Mercurial > dotfiles
diff .elisp/js2.el @ 27:614a83a1c5dd
Add js2-mode.
| author | Augie Fackler <durin42@gmail.com> |
|---|---|
| date | Tue, 30 Dec 2008 13:25:23 -0600 |
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new file mode 100644 --- /dev/null +++ b/.elisp/js2.el @@ -0,0 +1,11659 @@ +;;; js2.el -- an improved JavaScript editing mode +;;; +;;; This file was auto-generated on Mon Jun 16 01:46:45 2008 from files: +;;; js2-vars.el +;;; js2-util.el +;;; js2-scan.el +;;; js2-messages.el +;;; js2-ast.el +;;; js2-highlight.el +;;; js2-browse.el +;;; js2-parse.el +;;; js2-indent.el +;;; js2-mode.el + +;;; js2-mode.el --- an improved JavaScript editing mode + +;; Author: Steve Yegge (steve.yegge@gmail.com) +;; Version: 20080616 +;; Keywords: javascript languages + +;; This program is free software; you can redistribute it and/or +;; modify it under the terms of the GNU General Public License as +;; published by the Free Software Foundation; either version 2 of +;; the License, or (at your option) any later version. + +;; This program is distributed in the hope that it will be +;; useful, but WITHOUT ANY WARRANTY; without even the implied +;; warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR +;; PURPOSE. See the GNU General Public License for more details. + +;; You should have received a copy of the GNU General Public +;; License along with this program; if not, write to the Free +;; Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, +;; MA 02111-1307 USA + +;;; Commentary: + +;; This JavaScript editing mode supports: +;; +;; - the full JavaScript language through version 1.7 +;; - support for most Rhino and SpiderMonkey extensions from 1.5 to 1.7 +;; - accurate syntax highlighting using a recursive-descent parser +;; - syntax-error and strict-mode warning reporting +;; - "bouncing" line indentation to choose among alternate indentation points +;; - smart line-wrapping within comments (Emacs 22+) and strings +;; - code folding: +;; - show some or all function bodies as {...} +;; - show some or all block comments as /*...*/ +;; - context-sensitive menu bar and popup menus +;; - code browsing using the `imenu' package +;; - typing helpers (e.g. inserting matching braces/parens) +;; - many customization options +;; +;; It is only compatible with GNU Emacs versions 21 and higher (not XEmacs). +;; +;; Installation: +;; +;; - put `js2.el' somewhere in your emacs load path +;; - M-x byte-compile-file RET <path-to-js2.el> RET +;; Note: it will refuse to run unless byte-compiled +;; - add these lines to your .emacs file: +;; (autoload 'js2-mode "js2" nil t) +;; (add-to-list 'auto-mode-alist '("\\.js$" . js2-mode)) +;; +;; To customize how it works: +;; M-x customize-group RET js2-mode RET +;; +;; The variable `js2-mode-version' is a date stamp. When you upgrade +;; to a newer version, you must byte-compile the file again. +;; +;; Notes: +;; +;; This mode is different in many ways from standard Emacs language editing +;; modes, inasmuch as it attempts to be more like an IDE. If this drives +;; you crazy, it IS possible to customize it to be more like other Emacs +;; editing modes. Please customize the group `js2-mode' to see all of the +;; configuration options. +;; +;; Some of the functionality does not work in Emacs 21 -- upgrading to +;; Emacs 22 or higher will get you better results. If you byte-compiled +;; js2.el with Emacs 21, you should re-compile it for Emacs 22. +;; +;; Unlike cc-engine based language modes, js2-mode's line-indentation is not +;; customizable. It is a surprising amount of work to support customizable +;; indentation. The current compromise is that the tab key lets you cycle among +;; various likely indentation points, similar to the behavior of python-mode. +;; +;; This mode does not yet work with "multi-mode" modes such as mmm-mode +;; and mumamo, although it could possibly be made to do so with some effort. +;; This means that js2-mode is currently only useful for editing JavaScript +;; files, and not for editing JavaScript within <script> tags or templates. +;; +;; This code is part of a larger project, in progress, to enable writing +;; Emacs customizations in JavaScript. +;; +;; Please email bug reports and suggestions to the author, or submit them +;; at http://code.google.com/p/js2-mode/issues + +;; TODO: +;; - add unreachable-code warning (error?) using the inconsistent-return analysis +;; - labeled stmt length is now 1 +;; - "anonymous function does not always return a value" - use getter/setter name +;; - extend js2-missing-semi-one-line-override to handle catch (e) {return x} +;; - set a text prop on autoinserted delimiters and don't biff user-entered ones +;; - when inserting magic curlies, look for matching close-curly before inserting +;; - get more use out of the symbol table: +;; - jump to declaration (put hyperlinks on all non-decl var usages?) +;; - rename variable/function +;; - warn on unused var +;; - add some dabbrev-expansions for built-in keywords like finally, function +;; - add at least some completion support, e.g. for built-ins +;; - code formatting + +;;; Code: +;;; js2-vars.el -- byte-compiler support for js2-mode + +;; Author: Steve Yegge (steve.yegge@gmail.com) +;; Keywords: javascript languages + +;;; Code: + +(eval-when-compile + (require 'cl)) + +(eval-and-compile + (require 'cc-mode) ; (only) for `c-populate-syntax-table' + (require 'cc-langs) ; it's here in Emacs 21... + (require 'cc-engine)) ; for `c-paragraph-start' et. al. + +(defvar js2-emacs22 (>= emacs-major-version 22)) + +(defcustom js2-highlight-level 2 + "Amount of syntax highlighting to perform. +nil, zero or negative means none. +1 adds basic syntax highlighting. +2 adds highlighting of some Ecma built-in properties. +3 adds highlighting of many Ecma built-in functions." + :type 'integer + :group 'js2-mode) + +(defvar js2-mode-dev-mode-p nil + "Non-nil if running in development mode. Normally nil.") + +(defgroup js2-mode nil + "An improved JavaScript mode." + :group 'languages) + +(defcustom js2-basic-offset (if (and (boundp 'c-basic-offset) + (numberp c-basic-offset)) + c-basic-offset + 2) + "Number of spaces to indent nested statements. +Similar to `c-basic-offset'." + :group 'js2-mode + :type 'integer) +(make-variable-buffer-local 'js2-basic-offset) + +(defcustom js2-cleanup-whitespace t + "Non-nil to invoke `delete-trailing-whitespace' before saves." + :type 'boolean + :group 'js2-mode) + +(defcustom js2-move-point-on-right-click t + "Non-nil to move insertion point when you right-click. +This makes right-click context menu behavior a bit more intuitive, +since menu operations generally apply to the point. The exception +is if there is a region selection, in which case the point does -not- +move, so cut/copy/paste etc. can work properly. + +Note that IntelliJ moves the point, and Eclipse leaves it alone, +so this behavior is customizable." + :group 'js2-mode + :type 'boolean) + +(defcustom js2-mirror-mode t + "Non-nil to insert closing brackets, parens, etc. automatically." + :group 'js2-mode + :type 'boolean) + +(defcustom js2-auto-indent-flag t + "Automatic indentation with punctuation characters. If non-nil, the +current line is indented when certain punctuations are inserted." + :group 'js2-mode + :type 'boolean) + +(defcustom js2-bounce-indent-flag t + "Non-nil to have indent-line function choose among alternatives. +If nil, the indent-line function will indent to a predetermined column +based on heuristic guessing. If non-nil, then if the current line is +already indented to that predetermined column, indenting will choose +another likely column and indent to that spot. Repeated invocation of +the indent-line function will cycle among the computed alternatives. +See the function `js2-bounce-indent' for details." + :type 'boolean + :group 'js2-mode) + +(defcustom js2-indent-on-enter-key nil + "Non-nil to have Enter/Return key indent the line. +This is unusual for Emacs modes but common in IDEs like Eclipse." + :type 'boolean + :group 'js2-mode) + +(defcustom js2-enter-indents-newline t + "Non-nil to have Enter/Return key indent the newly-inserted line. +This is unusual for Emacs modes but common in IDEs like Eclipse." + :type 'boolean + :group 'js2-mode) + +(defcustom js2-rebind-eol-bol-keys t + "Non-nil to rebind beginning-of-line and end-of-line keys. +If non-nil, bounce between bol/eol and first/last non-whitespace char." + :group 'js2-mode + :type 'boolean) + +(defcustom js2-electric-keys '("{" "}" "(" ")" "[" "]" ":" ";" "," "*") + "Keys that auto-indent when `js2-auto-indent-flag' is non-nil. +Each value in the list is passed to `define-key'." + :type 'list + :group 'js2-mode) + +(defcustom js2-idle-timer-delay 0.2 + "Delay in secs before re-parsing after user makes changes. +Multiplied by `js2-dynamic-idle-timer-adjust', which see." + :type 'number + :group 'js2-mode) +(make-variable-buffer-local 'js2-idle-timer-delay) + +(defcustom js2-dynamic-idle-timer-adjust 0 + "Positive to adjust `js2-idle-timer-delay' based on file size. +The idea is that for short files, parsing is faster so we can be +more responsive to user edits without interfering with editing. +The buffer length in characters (typically bytes) is divided by +this value and used to multiply `js2-idle-timer-delay' for the +buffer. For example, a 21k file and 10k adjust yields 21k/10k +== 2, so js2-idle-timer-delay is multiplied by 2. +If `js2-dynamic-idle-timer-adjust' is 0 or negative, +`js2-idle-timer-delay' is not dependent on the file size." + :type 'number + :group 'js2-mode) + +(defcustom js2-mode-escape-quotes t + "Non-nil to disable automatic quote-escaping inside strings." + :type 'boolean + :group 'js2-mode) + +(defcustom js2-mode-squeeze-spaces t + "Non-nil to normalize whitespace when filling in comments. +Multiple runs of spaces are converted to a single space." + :type 'boolean + :group 'js2-mode) + +(defcustom js2-mode-show-parse-errors t + "True to highlight parse errors." + :type 'boolean + :group 'js2-mode) + +(defcustom js2-mode-show-strict-warnings t + "Non-nil to emit Ecma strict-mode warnings. +Some of the warnings can be individually disabled by other flags, +even if this flag is non-nil." + :type 'boolean + :group 'js2-mode) + +(defcustom js2-strict-trailing-comma-warning t + "Non-nil to warn about trailing commas in array literals. +Ecma-262 forbids them, but many browsers permit them. IE is the +big exception, and can produce bugs if you have trailing commas." + :type 'boolean + :group 'js2-mode) + +(defcustom js2-strict-missing-semi-warning t + "Non-nil to warn about semicolon auto-insertion after statement. +Technically this is legal per Ecma-262, but some style guides disallow +depending on it." + :type 'boolean + :group 'js2-mode) + +(defcustom js2-missing-semi-one-line-override nil + "Non-nil to permit missing semicolons in one-line functions. +In one-liner functions such as `function identity(x) {return x}' +people often omit the semicolon for a cleaner look. If you are +such a person, you can suppress the missing-semicolon warning +by setting this variable to t." + :type 'boolean + :group 'js2-mode) + +(defcustom js2-strict-inconsistent-return-warning t + "Non-nil to warn about mixing returns with value-returns. +It's perfectly legal to have a `return' and a `return foo' in the +same function, but it's often an indicator of a bug, and it also +interferes with type inference (in systems that support it.)" + :type 'boolean + :group 'js2-mode) + +(defcustom js2-strict-cond-assign-warning t + "Non-nil to warn about expressions like if (a = b). +This often should have been '==' instead of '='. If the warning +is enabled, you can suppress it on a per-expression basis by +parenthesizing the expression, e.g. if ((a = b)) ..." + :type 'boolean + :group 'js2-mode) + +(defcustom js2-strict-cond-assign-warning t + "Non-nil to warn about expressions like if (a = b). +This often should have been '==' instead of '='. If the warning +is enabled, you can suppress it on a per-expression basis by +parenthesizing the expression, e.g. if ((a = b)) ..." + :type 'boolean + :group 'js2-mode) + +(defcustom js2-strict-var-redeclaration-warning t + "Non-nil to warn about redeclaring variables in a script or function." + :type 'boolean + :group 'js2-mode) + +(defcustom js2-strict-var-hides-function-arg-warning t + "Non-nil to warn about a var decl hiding a function argument." + :type 'boolean + :group 'js2-mode) + +(defcustom js2-skip-preprocessor-directives nil + "Non-nil to treat lines beginning with # as comments. +Useful for viewing Mozilla JavaScript source code." + :type 'boolean + :group 'js2-mode) + +(defcustom js2-basic-offset c-basic-offset + "Functions like `c-basic-offset' in js2-mode buffers." + :type 'integer + :group 'js2-mode) +(make-variable-buffer-local 'js2-basic-offset) + +(defcustom js2-language-version 170 + "Configures what JavaScript language version to recognize. +Currently only 150, 160 and 170 are supported, corresponding +to JavaScript 1.5, 1.6 and 1.7, respectively. In a nutshell, +1.6 adds E4X support, and 1.7 adds let, yield, and Array +comprehensions." + :type 'integer + :group 'js2-mode) + +(defcustom js2-allow-keywords-as-property-names t + "If non-nil, you can use JavaScript keywords as object property names. +Examples: + + var foo = {int: 5, while: 6, continue: 7}; + foo.return = 8; + +Ecma-262 forbids this syntax, but many browsers support it." + :type 'boolean + :group 'js2-mode) + +(defcustom js2-instanceof-has-side-effects nil + "If non-nil, treats the instanceof operator as having side effects. +This is useful for xulrunner apps." + :type 'boolean + :group 'js2-mode) + +(defcustom js2-allow-rhino-new-expr-initializer nil + "Non-nil to support a Rhino's experimental syntactic construct. + +Rhino supports the ability to follow a `new' expression with an object +literal, which is used to set additional properties on the new object +after calling its constructor. Syntax: + + new <expr> [ ( arglist ) ] [initializer] + +Hence, this expression: + + new Object {a: 1, b: 2} + +results in an Object with properties a=1 and b=2. This syntax is +apparently not configurable in Rhino - it's currently always enabled, +as of Rhino version 1.7R2." + :type 'boolean + :group 'js2-mode) + +(defcustom js2-allow-member-expr-as-function-name nil + "Non-nil to support experimental Rhino syntax for function names. + +Rhino supports an experimental syntax configured via the Rhino Context +setting `allowMemberExprAsFunctionName'. The experimental syntax is: + + function <member-expr> ( [ arg-list ] ) { <body> } + +Where member-expr is a non-parenthesized 'member expression', which +is anything at the grammar level of a new-expression or lower, meaning +any expression that does not involve infix or unary operators. + +When <member-expr> is not a simple identifier, then it is syntactic +sugar for assigning the anonymous function to the <member-expr>. Hence, +this code: + + function a.b().c[2] (x, y) { ... } + +is rewritten as: + + a.b().c[2] = function(x, y) {...} + +which doesn't seem particularly useful, but Rhino permits it." + :type 'boolean + :group 'js2-mode) + +(defvar js2-mode-version 20080616 + "Release number for `js2-mode'.") + +;; scanner variables + +;; We record the start and end position of each token. +(defvar js2-token-beg 1) +(make-variable-buffer-local 'js2-token-beg) +(defvar js2-token-end -1) +(make-variable-buffer-local 'js2-token-end) + +(defvar js2-EOF_CHAR -1 + "Represents end of stream. Distinct from js2-EOF token type.") + +;; I originally used symbols to represent tokens, but Rhino uses +;; ints and then sets various flag bits in them, so ints it is. +;; The upshot is that we need a `js2-' prefix in front of each name. +(defvar js2-ERROR -1) +(defvar js2-EOF 0) +(defvar js2-EOL 1) +(defvar js2-ENTERWITH 2) ; begin interpreter bytecodes +(defvar js2-LEAVEWITH 3) +(defvar js2-RETURN 4) +(defvar js2-GOTO 5) +(defvar js2-IFEQ 6) +(defvar js2-IFNE 7) +(defvar js2-SETNAME 8) +(defvar js2-BITOR 9) +(defvar js2-BITXOR 10) +(defvar js2-BITAND 11) +(defvar js2-EQ 12) +(defvar js2-NE 13) +(defvar js2-LT 14) +(defvar js2-LE 15) +(defvar js2-GT 16) +(defvar js2-GE 17) +(defvar js2-LSH 18) +(defvar js2-RSH 19) +(defvar js2-URSH 20) +(defvar js2-ADD 21) ; infix plus +(defvar js2-SUB 22) ; infix minus +(defvar js2-MUL 23) +(defvar js2-DIV 24) +(defvar js2-MOD 25) +(defvar js2-NOT 26) +(defvar js2-BITNOT 27) +(defvar js2-POS 28) ; unary plus +(defvar js2-NEG 29) ; unary minus +(defvar js2-NEW 30) +(defvar js2-DELPROP 31) +(defvar js2-TYPEOF 32) +(defvar js2-GETPROP 33) +(defvar js2-GETPROPNOWARN 34) +(defvar js2-SETPROP 35) +(defvar js2-GETELEM 36) +(defvar js2-SETELEM 37) +(defvar js2-CALL 38) +(defvar js2-NAME 39) ; an identifier +(defvar js2-NUMBER 40) +(defvar js2-STRING 41) +(defvar js2-NULL 42) +(defvar js2-THIS 43) +(defvar js2-FALSE 44) +(defvar js2-TRUE 45) +(defvar js2-SHEQ 46) ; shallow equality (===) +(defvar js2-SHNE 47) ; shallow inequality (!==) +(defvar js2-REGEXP 48) +(defvar js2-BINDNAME 49) +(defvar js2-THROW 50) +(defvar js2-RETHROW 51) ; rethrow caught exception: catch (e if ) uses it +(defvar js2-IN 52) +(defvar js2-INSTANCEOF 53) +(defvar js2-LOCAL_LOAD 54) +(defvar js2-GETVAR 55) +(defvar js2-SETVAR 56) +(defvar js2-CATCH_SCOPE 57) +(defvar js2-ENUM_INIT_KEYS 58) +(defvar js2-ENUM_INIT_VALUES 59) +(defvar js2-ENUM_INIT_ARRAY 60) +(defvar js2-ENUM_NEXT 61) +(defvar js2-ENUM_ID 62) +(defvar js2-THISFN 63) +(defvar js2-RETURN_RESULT 64) ; to return previously stored return result +(defvar js2-ARRAYLIT 65) ; array literal +(defvar js2-OBJECTLIT 66) ; object literal +(defvar js2-GET_REF 67) ; *reference +(defvar js2-SET_REF 68) ; *reference = something +(defvar js2-DEL_REF 69) ; delete reference +(defvar js2-REF_CALL 70) ; f(args) = something or f(args)++ +(defvar js2-REF_SPECIAL 71) ; reference for special properties like __proto +(defvar js2-YIELD 72) ; JS 1.7 yield pseudo keyword + +;; XML support +(defvar js2-DEFAULTNAMESPACE 73) +(defvar js2-ESCXMLATTR 74) +(defvar js2-ESCXMLTEXT 75) +(defvar js2-REF_MEMBER 76) ; Reference for x.@y, x..y etc. +(defvar js2-REF_NS_MEMBER 77) ; Reference for x.ns::y, x..ns::y etc. +(defvar js2-REF_NAME 78) ; Reference for @y, @[y] etc. +(defvar js2-REF_NS_NAME 79) ; Reference for ns::y, @ns::y@[y] etc. + +(defvar js2-first-bytecode js2-ENTERWITH) +(defvar js2-last-bytecode js2-REF_NS_NAME) + +(defvar js2-TRY 80) +(defvar js2-SEMI 81) ; semicolon +(defvar js2-LB 82) ; left and right brackets +(defvar js2-RB 83) +(defvar js2-LC 84) ; left and right curly-braces +(defvar js2-RC 85) +(defvar js2-LP 86) ; left and right parens +(defvar js2-RP 87) +(defvar js2-COMMA 88) ; comma operator + +(defvar js2-ASSIGN 89) ; simple assignment (=) +(defvar js2-ASSIGN_BITOR 90) ; |= +(defvar js2-ASSIGN_BITXOR 91) ; ^= +(defvar js2-ASSIGN_BITAND 92) ; &= +(defvar js2-ASSIGN_LSH 93) ; <<= +(defvar js2-ASSIGN_RSH 94) ; >>= +(defvar js2-ASSIGN_URSH 95) ; >>>= +(defvar js2-ASSIGN_ADD 96) ; += +(defvar js2-ASSIGN_SUB 97) ; -= +(defvar js2-ASSIGN_MUL 98) ; *= +(defvar js2-ASSIGN_DIV 99) ; /= +(defvar js2-ASSIGN_MOD 100) ; %= + +(defvar js2-first-assign js2-ASSIGN) +(defvar js2-last-assign js2-ASSIGN_MOD) + +(defvar js2-HOOK 101) ; conditional (?:) +(defvar js2-COLON 102) +(defvar js2-OR 103) ; logical or (||) +(defvar js2-AND 104) ; logical and (&&) +(defvar js2-INC 105) ; increment/decrement (++ --) +(defvar js2-DEC 106) +(defvar js2-DOT 107) ; member operator (.) +(defvar js2-FUNCTION 108) ; function keyword +(defvar js2-EXPORT 109) ; export keyword +(defvar js2-IMPORT 110) ; import keyword +(defvar js2-IF 111) ; if keyword +(defvar js2-ELSE 112) ; else keyword +(defvar js2-SWITCH 113) ; switch keyword +(defvar js2-CASE 114) ; case keyword +(defvar js2-DEFAULT 115) ; default keyword +(defvar js2-WHILE 116) ; while keyword +(defvar js2-DO 117) ; do keyword +(defvar js2-FOR 118) ; for keyword +(defvar js2-BREAK 119) ; break keyword +(defvar js2-CONTINUE 120) ; continue keyword +(defvar js2-VAR 121) ; var keyword +(defvar js2-WITH 122) ; with keyword +(defvar js2-CATCH 123) ; catch keyword +(defvar js2-FINALLY 124) ; finally keyword +(defvar js2-VOID 125) ; void keyword +(defvar js2-RESERVED 126) ; reserved keywords + +(defvar js2-EMPTY 127) + +;; Types used for the parse tree - never returned by scanner. + +(defvar js2-BLOCK 128) ; statement block +(defvar js2-LABEL 129) ; label +(defvar js2-TARGET 130) +(defvar js2-LOOP 131) +(defvar js2-EXPR_VOID 132) ; expression statement in functions +(defvar js2-EXPR_RESULT 133) ; expression statement in scripts +(defvar js2-JSR 134) +(defvar js2-SCRIPT 135) ; top-level node for entire script +(defvar js2-TYPEOFNAME 136) ; for typeof(simple-name) +(defvar js2-USE_STACK 137) +(defvar js2-SETPROP_OP 138) ; x.y op= something +(defvar js2-SETELEM_OP 139) ; x[y] op= something +(defvar js2-LOCAL_BLOCK 140) +(defvar js2-SET_REF_OP 141) ; *reference op= something + +;; For XML support: +(defvar js2-DOTDOT 142) ; member operator (..) +(defvar js2-COLONCOLON 143) ; namespace::name +(defvar js2-XML 144) ; XML type +(defvar js2-DOTQUERY 145) ; .() -- e.g., x.emps.emp.(name == "terry") +(defvar js2-XMLATTR 146) ; @ +(defvar js2-XMLEND 147) + +;; Optimizer-only tokens +(defvar js2-TO_OBJECT 148) +(defvar js2-TO_DOUBLE 149) + +(defvar js2-GET 150) ; JS 1.5 get pseudo keyword +(defvar js2-SET 151) ; JS 1.5 set pseudo keyword +(defvar js2-LET 152) ; JS 1.7 let pseudo keyword +(defvar js2-CONST 153) +(defvar js2-SETCONST 154) +(defvar js2-SETCONSTVAR 155) +(defvar js2-ARRAYCOMP 156) +(defvar js2-LETEXPR 157) +(defvar js2-WITHEXPR 158) +(defvar js2-DEBUGGER 159) + +(defvar js2-COMMENT 160) ; not yet in Rhino + +(defvar js2-num-tokens (1+ js2-COMMENT)) + +(defconst js2-debug-print-trees nil) + +;; Rhino accepts any string or stream as input. +;; Emacs character processing works best in buffers, so we'll +;; assume the input is a buffer. JavaScript strings can be +;; copied into temp buffers before scanning them. + +(defmacro deflocal (name value comment) + `(progn + (defvar ,name ,value ,comment) + (make-variable-buffer-local ',name))) + +;; Buffer-local variables yield much cleaner code than using `defstruct'. +;; They're the Emacs equivalent of instance variables, more or less. + +(deflocal js2-ts-dirty-line nil + "Token stream buffer-local variable. +Indicates stuff other than whitespace since start of line.") + +(deflocal js2-ts-regexp-flags nil + "Token stream buffer-local variable.") + +(deflocal js2-ts-string "" + "Token stream buffer-local variable. +Last string scanned.") + +(deflocal js2-ts-number nil + "Token stream buffer-local variable. +Last literal number scanned.") + +(deflocal js2-ts-hit-eof nil + "Token stream buffer-local variable.") + +(deflocal js2-ts-line-start 0 + "Token stream buffer-local variable.") + +(deflocal js2-ts-lineno 1 + "Token stream buffer-local variable.") + +(deflocal js2-ts-line-end-char -1 + "Token stream buffer-local variable.") + +(deflocal js2-ts-cursor 1 ; emacs buffers are 1-indexed + "Token stream buffer-local variable. +Current scan position.") + +(deflocal js2-ts-is-xml-attribute nil + "Token stream buffer-local variable.") + +(deflocal js2-ts-xml-is-tag-content nil + "Token stream buffer-local variable.") + +(deflocal js2-ts-xml-open-tags-count 0 + "Token stream buffer-local variable.") + +(deflocal js2-ts-string-buffer nil + "Token stream buffer-local variable. +List of chars built up while scanning various tokens.") + +(deflocal js2-ts-comment-type nil + "Token stream buffer-local variable.") + +;;; Parser variables + +(defvar js2-parsed-errors nil + "List of errors produced during scanning/parsing.") +(make-variable-buffer-local 'js2-parsed-errors) + +(defvar js2-parsed-warnings nil + "List of warnings produced during scanning/parsing.") +(make-variable-buffer-local 'js2-parsed-warnings) + +(defvar js2-recover-from-parse-errors t + "Non-nil to continue parsing after a syntax error. + +In recovery mode, the AST will be built in full, and any error +nodes will be flagged with appropriate error information. If +this flag is nil, a syntax error will result in an error being +signaled. + +The variable is automatically buffer-local, because different +modes that use the parser will need different settings.") +(make-variable-buffer-local 'js2-recover-from-parse-errors) + +(defvar js2-parse-hook nil + "List of callbacks for receiving parsing progress.") +(make-variable-buffer-local 'js2-parse-hook) + +(defvar js2-parse-finished-hook nil + "List of callbacks to notify when parsing finishes. +Not called if parsing was interrupted.") + +(defvar js2-is-eval-code nil + "True if we're evaluating code in a string. +If non-nil, the tokenizer will record the token text, and the AST nodes +will record their source text. Off by default for IDE modes, since the +text is available in the buffer.") +(make-variable-buffer-local 'js2-is-eval-code) + +(defvar js2-parse-ide-mode t + "Non-nil if the parser is being used for `js2-mode'. +If non-nil, the parser will set text properties for fontification +and the syntax-table. The value should be nil when using the +parser as a frontend to an interpreter or byte compiler.") + +;;; Parser instance variables (buffer-local vars for js2-parse) + +(defconst js2-clear-ti-mask #xFFFF + "Mask to clear token information bits.") + +(defconst js2-ti-after-eol (lsh 1 16) + "Flag: first token of the source line.") + +(defconst js2-ti-check-label (lsh 1 17) + "Flag: indicates to check for label.") + +;; Inline Rhino's CompilerEnvirons vars as buffer-locals. + +(defvar js2-compiler-generate-debug-info t) +(make-variable-buffer-local 'js2-compiler-generate-debug-info) + +(defvar js2-compiler-use-dynamic-scope nil) +(make-variable-buffer-local 'js2-compiler-use-dynamic-scope) + +(defvar js2-compiler-reserved-keywords-as-identifier nil) +(make-variable-buffer-local 'js2-compiler-reserved-keywords-as-identifier) + +(defvar js2-compiler-xml-available t) +(make-variable-buffer-local 'js2-compiler-xml-available) + +(defvar js2-compiler-optimization-level 0) +(make-variable-buffer-local 'js2-compiler-optimization-level) + +(defvar js2-compiler-generating-source t) +(make-variable-buffer-local 'js2-compiler-generating-source) + +(defvar js2-compiler-strict-mode nil) +(make-variable-buffer-local 'js2-compiler-strict-mode) + +(defvar js2-compiler-report-warning-as-error nil) +(make-variable-buffer-local 'js2-compiler-report-warning-as-error) + +(defvar js2-compiler-generate-observer-count nil) +(make-variable-buffer-local 'js2-compiler-generate-observer-count) + +(defvar js2-compiler-activation-names nil) +(make-variable-buffer-local 'js2-compiler-activation-names) + +;; SKIP: sourceURI + +;; There's a compileFunction method in Context.java - may need it. +(defvar js2-called-by-compile-function nil + "True if `js2-parse' was called by `js2-compile-function'. +Will only be used when we finish implementing the interpreter.") +(make-variable-buffer-local 'js2-called-by-compile-function) + +;; SKIP: ts (we just call `js2-init-scanner' and use its vars) + +(defvar js2-current-flagged-token js2-EOF) +(make-variable-buffer-local 'js2-current-flagged-token) + +(defvar js2-current-token js2-EOF) +(make-variable-buffer-local 'js2-current-token) + +;; SKIP: node factory - we're going to just call functions directly, +;; and eventually go to a unified AST format. + +(defvar js2-nesting-of-function 0) +(make-variable-buffer-local 'js2-nesting-of-function) + +(defvar js2-recorded-assignments nil) +(make-variable-buffer-local 'js2-assignments-from-parse) + +;; SKIP: decompiler +;; SKIP: encoded-source + +;;; These variables are per-function and should be saved/restored +;;; during function parsing. + +(defvar js2-current-script-or-fn nil) +(make-variable-buffer-local 'js2-current-script-or-fn) + +(defvar js2-current-scope nil) +(make-variable-buffer-local 'js2-current-scope) + +(defvar js2-nesting-of-with 0) +(make-variable-buffer-local 'js2-nesting-of-with) + +(defvar js2-label-set nil + "An alist mapping label names to nodes.") +(make-variable-buffer-local 'js2-label-set) + +(defvar js2-loop-set nil) +(make-variable-buffer-local 'js2-loop-set) + +(defvar js2-loop-and-switch-set nil) +(make-variable-buffer-local 'js2-loop-and-switch-set) + +(defvar js2-has-return-value nil) +(make-variable-buffer-local 'js2-has-return-value) + +(defvar js2-end-flags 0) +(make-variable-buffer-local 'js2-end-flags) + +;;; end of per function variables + +;; Without 2-token lookahead, labels are a problem. +;; These vars store the token info of the last matched name, +;; iff it wasn't the last matched token. Only valid in some contexts. +(defvar js2-prev-name-token-start nil) +(defvar js2-prev-name-token-string nil) + +(defsubst js2-save-name-token-data (pos name) + (setq js2-prev-name-token-start pos + js2-prev-name-token-string name)) + +;; These flags enumerate the possible ways a statement/function can +;; terminate. These flags are used by endCheck() and by the Parser to +;; detect inconsistent return usage. +;; +;; END_UNREACHED is reserved for code paths that are assumed to always be +;; able to execute (example: throw, continue) +;; +;; END_DROPS_OFF indicates if the statement can transfer control to the +;; next one. Statement such as return dont. A compound statement may have +;; some branch that drops off control to the next statement. +;; +;; END_RETURNS indicates that the statement can return (without arguments) +;; END_RETURNS_VALUE indicates that the statement can return a value. +;; +;; A compound statement such as +;; if (condition) { +;; return value; +;; } +;; Will be detected as (END_DROPS_OFF | END_RETURN_VALUE) by endCheck() + +(defconst js2-end-unreached #x0) +(defconst js2-end-drops-off #x1) +(defconst js2-end-returns #x2) +(defconst js2-end-returns-value #x4) +(defconst js2-end-yields #x8) + +;; Rhino awkwardly passes a statementLabel parameter to the +;; statementHelper() function, the main statement parser, which +;; is then used by quite a few of the sub-parsers. We just make +;; it a buffer-local variable and make sure it's cleaned up properly. +(defvar js2-labeled-stmt nil) ; type `js2-labeled-stmt-node' +(make-variable-buffer-local 'js2-labeled-stmt) + +;; Similarly, Rhino passes an inForInit boolean through about half +;; the expression parsers. We use a dynamically-scoped variable, +;; which makes it easier to funcall the parsers individually without +;; worrying about whether they take the parameter or not. +(defvar js2-in-for-init nil) +(make-variable-buffer-local 'js2-in-for-init) + +(defvar js2-temp-name-counter 0) +(make-variable-buffer-local 'js2-temp-name-counter) + +(defvar js2-parse-stmt-count 0) +(make-variable-buffer-local 'js2-parse-stmt-count) + +(defsubst js2-get-next-temp-name () + (format "$%d" (incf js2-temp-name-counter))) + +(defvar js2-parse-interruptable-p t + "Set this to nil to force parse to continue until finished. +This will mostly be useful for interpreters.") + +(defvar js2-statements-per-pause 50 + "Pause after this many statements to check for user input. +If user input is pending, stop the parse and discard the tree. +This makes for a smoother user experience for large files. +You may have to wait a second or two before the highlighting +and error-reporting appear, but you can always type ahead if +you wish. This appears to be more or less how Eclipse, IntelliJ +and other editors work.") + +(defvar js2-record-comments t + "Instructs the scanner to record comments in `js2-scanned-comments'.") +(make-variable-buffer-local 'js2-record-comments) + +(defvar js2-scanned-comments nil + "List of all comments from the current parse.") +(make-variable-buffer-local 'js2-scanned-comments) + +(defun js2-underline-color (color) + "Return a legal value for the :underline face attribute based on COLOR." + ;; In XEmacs the :underline attribute can only be a boolean. + ;; In GNU it can be the name of a colour. + (if (featurep 'xemacs) + (if color t nil) + color)) + +(defcustom js2-mode-indent-inhibit-undo nil + "Non-nil to disable collection of Undo information when indenting lines. +Some users have requested this behavior. It's nil by default because +other Emacs modes don't work this way." + :type 'boolean + :group 'js2-mode) + +(defcustom js2-mode-indent-ignore-first-tab nil + "If non-nil, ignore first TAB keypress if we look indented properly. +It's fairly common for users to navigate to an already-indented line +and press TAB for reassurance that it's been indented. For this class +of users, we want the first TAB press on a line to be ignored if the +line is already indented to one of the precomputed alternatives. + +This behavior is only partly implemented. If you TAB-indent a line, +navigate to another line, and then navigate back, it fails to clear +the last-indented variable, so it thinks you've already hit TAB once, +and performs the indent. A full solution would involve getting on the +point-motion hooks for the entire buffer. If we come across another +use cases that requires watching point motion, I'll consider doing it. + +If you set this variable to nil, then the TAB key will always change +the indentation of the current line, if more than one alternative +indentation spot exists." + :type 'boolean + :group 'js2-mode) + +(defvar js2-indent-hook nil + "A hook for user-defined indentation rules. + +Functions on this hook should expect two arguments: (LIST INDEX) +The LIST argument is the list of computed indentation points for +the current line. INDEX is the list index of the indentation point +that `js2-bounce-indent' plans to use. If INDEX is nil, then the +indent function is not going to change the current line indentation. + +If a hook function on this list returns a non-nil value, then +`js2-bounce-indent' assumes the hook function has performed its own +indentation, and will do nothing. If all hook functions on the list +return nil, then `js2-bounce-indent' will use its computed indentation +and reindent the line. + +When hook functions on this hook list are called, the variable +`js2-mode-ast' may or may not be set, depending on whether the +parse tree is available. If the variable is nil, you can pass a +callback to `js2-mode-wait-for-parse', and your callback will be +called after the new parse tree is built. This can take some time +in large files.") + +(defface js2-warning-face + `((((class color) (background light)) + (:underline ,(js2-underline-color "orange"))) + (((class color) (background dark)) + (:underline ,(js2-underline-color "orange"))) + (t (:underline t))) + "Face for JavaScript warnings." + :group 'js2-mode) + +(defface js2-error-face + `((((class color) (background light)) + (:foreground "red")) + (((class color) (background dark)) + (:foreground "red")) + (t (:foreground "red"))) + "Face for JavaScript errors." + :group 'js2-mode) + +(defface js2-jsdoc-tag-face + '((t :foreground "SlateGray")) + "Face used to highlight @whatever tags in jsdoc comments." + :group 'js2-mode) + +(defface js2-jsdoc-type-face + '((t :foreground "SteelBlue")) + "Face used to highlight {FooBar} types in jsdoc comments." + :group 'js2-mode) + +(defface js2-jsdoc-value-face + '((t :foreground "PeachPuff3")) + "Face used to highlight tag values in jsdoc comments." + :group 'js2-mode) + +(defface js2-function-param-face + '((t :foreground "SeaGreen")) + "Face used to highlight function parameters in javascript." + :group 'js2-mode) + +(defface js2-instance-member-face + '((t :foreground "DarkOrchid")) + "Face used to highlight instance variables in javascript. +Not currently used." + :group 'js2-mode) + +(defface js2-private-member-face + '((t :foreground "PeachPuff3")) + "Face used to highlight calls to private methods in javascript. +Not currently used." + :group 'js2-mode) + +(defface js2-private-function-call-face + '((t :foreground "goldenrod")) + "Face used to highlight calls to private functions in javascript. +Not currently used." + :group 'js2-mode) + +(defface js2-jsdoc-html-tag-name-face + (if js2-emacs22 + '((((class color) (min-colors 88) (background light)) + (:foreground "rosybrown")) + (((class color) (min-colors 8) (background dark)) + (:foreground "yellow")) + (((class color) (min-colors 8) (background light)) + (:foreground "magenta"))) + '((((type tty pc) (class color) (background light)) + (:foreground "magenta")) + (((type tty pc) (class color) (background dark)) + (:foreground "yellow")) + (t (:foreground "RosyBrown")))) + "Face used to highlight jsdoc html tag names" + :group 'js2-mode) + +(defface js2-jsdoc-html-tag-delimiter-face + (if js2-emacs22 + '((((class color) (min-colors 88) (background light)) + (:foreground "dark khaki")) + (((class color) (min-colors 8) (background dark)) + (:foreground "green")) + (((class color) (min-colors 8) (background light)) + (:foreground "green"))) + '((((type tty pc) (class color) (background light)) + (:foreground "green")) + (((type tty pc) (class color) (background dark)) + (:foreground "green")) + (t (:foreground "dark khaki")))) + "Face used to highlight brackets in jsdoc html tags." + :group 'js2-mode) + +(defface js2-external-variable-face + '((t :foreground "orange")) + "Face used to highlight assignments to undeclared variables. +An undeclared variable is any variable not declared with var or let +in the current scope or any lexically enclosing scope. If you assign +to such a variable, then you are either expecting it to originate from +another file, or you've got a potential bug." + :group 'js2-mode) + +(defcustom js2-highlight-external-variables t + "Non-nil to higlight assignments to undeclared variables." + :type 'boolean + :group 'js2-mode) + +(defvar js2-mode-map + (let ((map (make-sparse-keymap)) + keys) + (define-key map [mouse-1] #'js2-mode-show-node) + (define-key map "\C-m" #'js2-enter-key) + (when js2-rebind-eol-bol-keys + (define-key map "\C-a" #'js2-beginning-of-line) + (define-key map "\C-e" #'js2-end-of-line)) + (define-key map "\C-c\C-e" #'js2-mode-hide-element) + (define-key map "\C-c\C-s" #'js2-mode-show-element) + (define-key map "\C-c\C-a" #'js2-mode-show-all) + (define-key map "\C-c\C-f" #'js2-mode-toggle-hide-functions) + (define-key map "\C-c\C-t" #'js2-mode-toggle-hide-comments) + (define-key map "\C-c\C-o" #'js2-mode-toggle-element) + (define-key map "\C-c\C-w" #'js2-mode-toggle-warnings-and-errors) + (define-key map (kbd "C-c C-'") #'js2-next-error) + ;; also define user's preference for next-error, if available + (if (setq keys (where-is-internal #'next-error)) + (define-key map (car keys) #'js2-next-error)) + (define-key map (or (car (where-is-internal #'mark-defun)) + (kbd "M-C-h")) + #'js2-mark-defun) + (define-key map (or (car (where-is-internal #'narrow-to-defun)) + (kbd "C-x nd")) + #'js2-narrow-to-defun) + (define-key map [down-mouse-3] #'js2-mouse-3) + (when js2-auto-indent-flag + (mapc (lambda (key) + (define-key map key #'js2-insert-and-indent)) + js2-electric-keys)) + + (define-key map [menu-bar javascript] + (cons "JavaScript" (make-sparse-keymap "JavaScript"))) + + (define-key map [menu-bar javascript customize-js2-mode] + '(menu-item "Customize js2-mode" js2-mode-customize + :help "Customize the behavior of this mode")) + + (define-key map [menu-bar javascript js2-force-refresh] + '(menu-item "Force buffer refresh" js2-mode-reset + :help "Re-parse the buffer from scratch")) + + (define-key map [menu-bar javascript separator-2] + '("--")) + + (define-key map [menu-bar javascript next-error] + '(menu-item "Next warning or error" js2-next-error + :enabled (and js2-mode-ast + (or (js2-ast-root-errors js2-mode-ast) + (js2-ast-root-warnings js2-mode-ast))) + :help "Move to next warning or error")) + + (define-key map [menu-bar javascript display-errors] + '(menu-item "Show errors and warnings" js2-mode-display-warnings-and-errors + :visible (not js2-mode-show-parse-errors) + :help "Turn on display of warnings and errors")) + + (define-key map [menu-bar javascript hide-errors] + '(menu-item "Hide errors and warnings" js2-mode-hide-warnings-and-errors + :visible js2-mode-show-parse-errors + :help "Turn off display of warnings and errors")) + + (define-key map [menu-bar javascript separator-1] + '("--")) + + (define-key map [menu-bar javascript js2-toggle-function] + '(menu-item "Show/collapse element" js2-mode-toggle-element + :help "Hide or show function body or comment")) + + (define-key map [menu-bar javascript show-comments] + '(menu-item "Show block comments" js2-mode-toggle-hide-comments + :visible js2-mode-comments-hidden + :help "Expand all hidden block comments")) + + (define-key map [menu-bar javascript hide-comments] + '(menu-item "Hide block comments" js2-mode-toggle-hide-comments + :visible (not js2-mode-comments-hidden) + :help "Show block comments as /*...*/")) + + (define-key map [menu-bar javascript show-all-functions] + '(menu-item "Show function bodies" js2-mode-toggle-hide-functions + :visible js2-mode-functions-hidden + :help "Expand all hidden function bodies")) + + (define-key map [menu-bar javascript hide-all-functions] + '(menu-item "Hide function bodies" js2-mode-toggle-hide-functions + :visible (not js2-mode-functions-hidden) + :help "Show {...} for all top-level function bodies")) + + map) + "Keymap used in `js2-mode' buffers.") + +(defconst js2-mode-identifier-re "[a-zA-Z_$][a-zA-Z0-9_$]*") + +(defvar js2-mode-//-comment-re "^\\(\\s-*\\)//.+" + "Matches a //-comment line. Must be first non-whitespace on line. +First match-group is the leading whitespace.") + +(defvar js2-mode-ast nil "Private variable.") +(make-variable-buffer-local 'js2-mode-ast) + +(defvar js2-mode-hook nil) + +(defvar js2-mode-parse-timer nil "Private variable.") +(make-variable-buffer-local 'js2-mode-parse-timer) + +(defvar js2-mode-buffer-dirty-p nil "Private variable.") +(make-variable-buffer-local 'js2-mode-buffer-dirty-p) + +(defvar js2-mode-parsing nil "Private variable.") +(make-variable-buffer-local 'js2-mode-parsing) + +(defvar js2-mode-node-overlay nil) +(make-variable-buffer-local 'js2-mode-node-overlay) + +(defvar js2-mode-show-overlay js2-mode-dev-mode-p + "Debug: Non-nil to highlight AST nodes on mouse-down.") + +(defvar js2-mode-fontifications nil "Private variable") +(make-variable-buffer-local 'js2-mode-fontifications) + +(defvar js2-mode-deferred-properties nil "Private variable") +(make-variable-buffer-local 'js2-mode-deferred-properties) + +(defvar js2-imenu-recorder nil "Private variable") +(make-variable-buffer-local 'js2-imenu-recorder) + +(defvar js2-imenu-function-map nil "Private variable") +(make-variable-buffer-local 'js2-imenu-function-map) + +(defvar js2-paragraph-start + "\\(@[a-zA-Z]+\\>\\|$\\)") + +;; Note that we also set a 'c-in-sws text property in html comments, +;; so that `c-forward-sws' and `c-backward-sws' work properly. +(defvar js2-syntactic-ws-start + "\\s \\|/[*/]\\|[\n\r]\\|\\\\[\n\r]\\|\\s!\\|<!--\\|^\\s-*-->") + +(defvar js2-syntactic-ws-end + "\\s \\|[\n\r/]\\|\\s!") + +(defvar js2-syntactic-eol + (concat "\\s *\\(/\\*[^*\n\r]*" + "\\(\\*+[^*\n\r/][^*\n\r]*\\)*" + "\\*+/\\s *\\)*" + "\\(//\\|/\\*[^*\n\r]*" + "\\(\\*+[^*\n\r/][^*\n\r]*\\)*$" + "\\|\\\\$\\|$\\)") + "Copied from java-mode. Needed for some cc-engine functions.") + +(defvar js2-comment-prefix-regexp + "//+\\|\\**") + +(defvar js2-comment-start-skip + "\\(//+\\|/\\*+\\)\\s *") + +(defvar js2-mode-verbose-parse-p js2-mode-dev-mode-p + "Non-nil to emit status messages during parsing.") + +(defvar js2-mode-functions-hidden nil "private variable") +(defvar js2-mode-comments-hidden nil "private variable") + +(defvar js2-mode-syntax-table + (let ((table (make-syntax-table))) + (c-populate-syntax-table table) + table) + "Syntax table used in js2-mode buffers.") + +(defvar js2-mode-abbrev-table nil + "Abbrev table in use in `js2-mode' buffers.") +(define-abbrev-table 'js2-mode-abbrev-table ()) + +(defvar js2-mode-must-byte-compile (not js2-mode-dev-mode-p) + "Non-nil to have `js2-mode' signal an error if not byte-compiled.") + +(defvar js2-mode-pending-parse-callbacks nil + "List of functions waiting to be notified that parse is finished.") + +(defvar js2-mode-last-indented-line -1) + +(eval-when-compile + (defvar c-paragraph-start nil) + (defvar c-paragraph-separate nil) + (defvar c-syntactic-ws-start nil) + (defvar c-syntactic-ws-end nil) + (defvar c-syntactic-eol nil) + (defvar running-xemacs nil) + (defvar font-lock-mode nil) + (defvar font-lock-keywords nil)) + +(eval-when-compile + (if (< emacs-major-version 22) + (defun c-setup-paragraph-variables () nil))) + +(provide 'js2-vars) + +;;; js2-vars.el ends here +;;; js2-util.el -- JavaScript utilities + +;; Author: Steve Yegge (steve.yegge@gmail.com) +;; Keywords: javascript languages + +;;; Code + +(eval-when-compile + (require 'cl)) + + +;; Emacs21 compatibility, plus some stuff to avoid runtime dependency on CL + +(unless (fboundp #'looking-back) + (defun looking-back (regexp &optional limit greedy) + "Return non-nil if text before point matches regular expression REGEXP. +Like `looking-at' except matches before point, and is slower. +LIMIT if non-nil speeds up the search by specifying a minimum +starting position, to avoid checking matches that would start +before LIMIT. + +If GREEDY is non-nil, extend the match backwards as far as possible, +stopping when a single additional previous character cannot be part +of a match for REGEXP." + (let ((start (point)) + (pos + (save-excursion + (and (re-search-backward (concat "\\(?:" regexp "\\)\\=") limit t) + (point))))) + (if (and greedy pos) + (save-restriction + (narrow-to-region (point-min) start) + (while (and (> pos (point-min)) + (save-excursion + (goto-char pos) + (backward-char 1) + (looking-at (concat "\\(?:" regexp "\\)\\'")))) + (setq pos (1- pos))) + (save-excursion + (goto-char pos) + (looking-at (concat "\\(?:" regexp "\\)\\'"))))) + (not (null pos))))) + +(unless (fboundp #'copy-overlay) + (defun copy-overlay (o) + "Return a copy of overlay O." + (let ((o1 (make-overlay (overlay-start o) (overlay-end o) + ;; FIXME: there's no easy way to find the + ;; insertion-type of the two markers. + (overlay-buffer o))) + (props (overlay-properties o))) + (while props + (overlay-put o1 (pop props) (pop props))) + o1))) + +(unless (fboundp #'remove-overlays) + (defun remove-overlays (&optional beg end name val) + "Clear BEG and END of overlays whose property NAME has value VAL. +Overlays might be moved and/or split. +BEG and END default respectively to the beginning and end of buffer." + (unless beg (setq beg (point-min))) + (unless end (setq end (point-max))) + (if (< end beg) + (setq beg (prog1 end (setq end beg)))) + (save-excursion + (dolist (o (overlays-in beg end)) + (when (eq (overlay-get o name) val) + ;; Either push this overlay outside beg...end + ;; or split it to exclude beg...end + ;; or delete it entirely (if it is contained in beg...end). + (if (< (overlay-start o) beg) + (if (> (overlay-end o) end) + (progn + (move-overlay (copy-overlay o) + (overlay-start o) beg) + (move-overlay o end (overlay-end o))) + (move-overlay o (overlay-start o) beg)) + (if (> (overlay-end o) end) + (move-overlay o end (overlay-end o)) + (delete-overlay o)))))))) + +;; we don't want a runtime dependency on the CL package, so define +;; our own versions of these functions. + +(defun js2-delete-if (predicate list) + "Remove all items satisfying PREDICATE in LIST." + (loop for item in list + if (not (funcall predicate item)) + collect item)) + +(defun js2-position (element list) + "Find 0-indexed position of ELEMENT in LIST comparing with `eq'. +Returns nil if element is not found in the list." + (let ((count 0) + found) + (while (and list (not found)) + (if (eq element (car list)) + (setq found t) + (setq count (1+ count) + list (cdr list)))) + (if found count))) + +(defun js2-find-if (predicate list) + "Find first item satisfying PREDICATE in LIST." + (let (result) + (while (and list (not result)) + (if (funcall predicate (car list)) + (setq result (car list))) + (setq list (cdr list))) + result)) + +;;; end Emacs 21 compat + +(defmacro js2-time (form) + "Evaluate FORM, discard result, and return elapsed time in sec" + (let ((beg (make-symbol "--js2-time-beg--")) + (delta (make-symbol "--js2-time-end--"))) + `(let ((,beg (current-time)) + ,delta) + ,form + (/ (truncate (* (- (float-time (current-time)) + (float-time ,beg))) + 10000) + 10000.0)))) + +(def-edebug-spec js2-time t) + +(defsubst neq (expr1 expr2) + "Return (not (eq expr1 expr2))." + (not (eq expr1 expr2))) + +(defsubst js2-same-line (pos) + "Return t if POS is on the same line as current point." + (and (>= pos (point-at-bol)) + (<= pos (point-at-eol)))) + +(defsubst js2-same-line-2 (p1 p2) + "Return t if p1 is on the same line as p2." + (save-excursion + (goto-char p1) + (js2-same-line p2))) + +(defun js2-code-bug () + "Signal an error when we encounter an unexpected code path." + (error "failed assertion")) + +;; I'd like to associate errors with nodes, but for now the +;; easiest thing to do is get the context info from the last token. +(defsubst js2-record-parse-error (msg &optional arg pos len) + (push (list (list msg arg) + (or pos js2-token-beg) + (or len (- js2-token-end js2-token-beg))) + js2-parsed-errors)) + +(defsubst js2-report-error (msg &optional msg-arg pos len) + "Signal a syntax error or record a parse error." + (if js2-recover-from-parse-errors + (js2-record-parse-error msg msg-arg pos len) + (signal 'js2-syntax-error + (list msg + js2-ts-lineno + (save-excursion + (goto-char js2-ts-cursor) + (current-column)) + js2-ts-hit-eof)))) + +(defsubst js2-report-warning (msg &optional msg-arg pos len) + (if js2-compiler-report-warning-as-error + (js2-report-error msg msg-arg pos len) + (push (list (list msg msg-arg) + (or pos js2-token-beg) + (or len (- js2-token-end js2-token-beg))) + js2-parsed-warnings))) + +(defsubst js2-add-strict-warning (msg-id &optional msg-arg beg end) + (if js2-compiler-strict-mode + (js2-report-warning msg-id msg-arg beg + (and beg end (- end beg))))) + +(put 'js2-syntax-error 'error-conditions + '(error syntax-error js2-syntax-error)) +(put 'js2-syntax-error 'error-message "Syntax error") + +(put 'js2-parse-error 'error-conditions + '(error parse-error js2-parse-error)) +(put 'js2-parse-error 'error-message "Parse error") + +(defmacro js2-clear-flag (flags flag) + `(setq ,flags (logand ,flags (lognot ,flag)))) + +(defmacro js2-set-flag (flags flag) + "Logical-or FLAG into FLAGS." + `(setq ,flags (logior ,flags ,flag))) + +(defsubst js2-flag-set-p (flags flag) + (/= 0 (logand flags flag))) + +(defsubst js2-flag-not-set-p (flags flag) + (zerop (logand flags flag))) + +;; Stolen shamelessly from James Clark's nxml-mode. +(defmacro js2-with-unmodifying-text-property-changes (&rest body) + "Evaluate BODY without any text property changes modifying the buffer. +Any text properties changes happen as usual but the changes are not treated as +modifications to the buffer." + (let ((modified (make-symbol "modified"))) + `(let ((,modified (buffer-modified-p)) + (inhibit-read-only t) + (inhibit-modification-hooks t) + (buffer-undo-list t) + (deactivate-mark nil) + ;; Apparently these avoid file locking problems. + (buffer-file-name nil) + (buffer-file-truename nil)) + (unwind-protect + (progn ,@body) + (unless ,modified + (restore-buffer-modified-p nil)))))) + +(put 'js2-with-unmodifying-text-property-changes 'lisp-indent-function 0) +(def-edebug-spec js2-with-unmodifying-text-property-changes t) + +(defmacro js2-with-underscore-as-word-syntax (&rest body) + "Evaluate BODY with the _ character set to be word-syntax." + (let ((old-syntax (make-symbol "old-syntax"))) + `(let ((,old-syntax (string (char-syntax ?_)))) + (unwind-protect + (progn + (modify-syntax-entry ?_ "w" js2-mode-syntax-table) + ,@body) + (modify-syntax-entry ?_ ,old-syntax js2-mode-syntax-table))))) + +(put 'js2-with-underscore-as-word-syntax 'lisp-indent-function 0) +(def-edebug-spec js2-with-underscore-as-word-syntax t) + +(defmacro with-buffer (buf form) + "Executes FORM in buffer BUF. +BUF can be a buffer name or a buffer object. +If the buffer doesn't exist, it's created." + `(let ((buffer (gentemp))) + (setq buffer + (if (stringp ,buf) + (get-buffer-create ,buf) + ,buf)) + (save-excursion + (set-buffer buffer) + ,form))) + +(defsubst char-is-uppercase (c) + "Return t if C is an uppercase character. +Handles unicode and latin chars properly." + (/= c (downcase c))) + +(defsubst char-is-lowercase (c) + "Return t if C is an uppercase character. +Handles unicode and latin chars properly." + (/= c (upcase c))) + +(put 'with-buffer 'lisp-indent-function 1) +(def-edebug-spec with-buffer t) + +(provide 'js2-util) + +;;; js2-util.el ends here +;;; js2-scan.el --- JavaScript scanner + +;; Author: Steve Yegge (steve.yegge@gmail.com) +;; Keywords: javascript languages + +;;; Commentary: + +;; A port of Mozilla Rhino's scanner. +;; Corresponds to Rhino files Token.java and TokenStream.java. + +;;; Code: + + +(eval-when-compile + (require 'cl)) + +(defvar js2-tokens nil + "List of all defined token names.") ; intialized below + +(defvar js2-token-names + (let* ((names (make-vector js2-num-tokens -1)) + (case-fold-search nil) ; only match js2-UPPER_CASE + (syms (apropos-internal "^js2-\\(?:[A-Z_]+\\)"))) + (loop for sym in syms + for i from 0 + do + (unless (or (memq sym '(js2-EOF_CHAR js2-ERROR)) + (not (boundp sym))) + (aset names (symbol-value sym) ; code, e.g. 152 + (substring (symbol-name sym) 4)) ; name, e.g. "LET" + (push sym js2-tokens))) + names) + "Vector mapping int values to token string names, sans `js2-' prefix.") + +(defun js2-token-name (tok) + "Return a string name for TOK, a token symbol or code. +Signals an error if it's not a recognized token." + (let ((code tok)) + (if (symbolp tok) + (setq code (symbol-value tok))) + (if (eq code -1) + "ERROR" + (if (and (numberp code) + (not (minusp code)) + (< code js2-num-tokens)) + (aref js2-token-names code) + (error "Invalid token: %s" code))))) + +(defsubst js2-token-sym (tok) + "Return symbol for TOK given its code, e.g. 'js2-LP for code 86." + (intern (js2-token-name tok))) + +(defvar js2-token-codes + (let ((table (make-hash-table :test 'eq :size 256))) + (loop for name across js2-token-names + for sym = (intern (concat "js2-" name)) + do + (puthash sym (symbol-value sym) table)) + ;; clean up a few that are "wrong" in Rhino's token codes + (puthash 'js2-DELETE js2-DELPROP table) + table) + "Hashtable mapping token symbols to their bytecodes.") + +(defsubst js2-token-code (sym) + "Return code for token symbol SYM, e.g. 86 for 'js2-LP." + (or (gethash sym js2-token-codes) + (error "Invalid token symbol: %s " sym))) ; signal code bug + +(defsubst js2-report-scan-error (msg &optional no-throw beg len) + (setq js2-token-end js2-ts-cursor) + (js2-report-error msg nil + (or beg js2-token-beg) + (or len (- js2-token-end js2-token-beg))) + (unless no-throw + (throw 'return js2-ERROR))) + +(defsubst js2-get-string-from-buffer () + "Reverse the char accumulator and return it as a string." + (setq js2-token-end js2-ts-cursor) + (if js2-ts-string-buffer + (apply #'string (nreverse js2-ts-string-buffer)) + "")) + +;; TODO: could potentially avoid a lot of consing by allocating a +;; char buffer the way Rhino does. +(defsubst js2-add-to-string (c) + (push c js2-ts-string-buffer)) + +;; Note that when we "read" the end-of-file, we advance js2-ts-cursor +;; to (1+ (point-max)), which lets the scanner treat end-of-file like +;; any other character: when it's not part of the current token, we +;; unget it, allowing it to be read again by the following call. +(defsubst js2-unget-char () + (decf js2-ts-cursor)) + +;; Rhino distinguishes \r and \n line endings. We don't need to +;; because we only scan from Emacs buffers, which always use \n. +(defsubst js2-get-char () + "Read and return the next character from the input buffer. +Increments `js2-ts-lineno' if the return value is a newline char. +Updates `js2-ts-cursor' to the point after the returned char. +Returns `js2-EOF_CHAR' if we hit the end of the buffer. +Also updates `js2-ts-hit-eof' and `js2-ts-line-start' as needed." + (let (c) + ;; check for end of buffer + (if (>= js2-ts-cursor (point-max)) + (setq js2-ts-hit-eof t + js2-ts-cursor (1+ js2-ts-cursor) + c js2-EOF_CHAR) ; return value + + ;; otherwise read next char + (setq c (char-before (incf js2-ts-cursor))) + + ;; if we read a newline, update counters + (if (= c ?\n) + (setq js2-ts-line-start js2-ts-cursor + js2-ts-lineno (1+ js2-ts-lineno))) + + ;; TODO: skip over format characters + c))) + +(defsubst js2-read-unicode-escape () + "Read a \\uNNNN sequence from the input. +Assumes the ?\ and ?u have already been read. +Returns the unicode character, or nil if it wasn't a valid character. +Doesn't change the values of any scanner variables." + ;; I really wish I knew a better way to do this, but I can't + ;; find the Emacs function that takes a 16-bit int and converts + ;; it to a Unicode/utf-8 character. So I basically eval it with (read). + ;; Have to first check that it's 4 hex characters or it may stop + ;; the read early. + (ignore-errors + (let ((s (buffer-substring-no-properties js2-ts-cursor + (+ 4 js2-ts-cursor)))) + (if (string-match "[a-zA-Z0-9]\\{4\\}" s) + (read (concat "?\\u" s)))))) + +(defsubst js2-match-char (test) + "Consume and return next character if it matches TEST, a character. +Returns nil and consumes nothing if TEST is not the next character." + (let ((c (js2-get-char))) + (if (eq c test) + t + (js2-unget-char) + nil))) + +(defsubst js2-peek-char () + (prog1 + (js2-get-char) + (js2-unget-char))) + +(defsubst js2-java-identifier-start-p (c) + (or + (memq c '(?$ ?_)) + (char-is-uppercase c) + (char-is-lowercase c))) + +(defsubst js2-java-identifier-part-p (c) + "Implementation of java.lang.Character.isJavaIdentifierPart()" + ;; TODO: make me Unicode-friendly. See comments above. + (or + (memq c '(?$ ?_)) + (char-is-uppercase c) + (char-is-lowercase c) + (and (>= c ?0) (<= c ?9)))) + +(defsubst js2-alpha-p (c) + ;; Use 'Z' < 'a' + (if (<= c ?Z) + (<= ?A c) + (and (<= ?a c) + (<= c ?z)))) + +(defsubst js2-digit-p (c) + (and (<= ?0 c) (<= c ?9))) + +(defsubst js2-js-space-p (c) + (if (<= c 127) + (memq c '(#x20 #x9 #xC #xB)) + (or + (eq c #xA0) + ;; TODO: change this nil to check for Unicode space character + nil))) + +(defsubst js2-skip-line () + "Skip to end of line" + (let (c) + (while (and (/= js2-EOF_CHAR (setq c (js2-get-char))) + (/= c ?\n))) + (js2-unget-char) + (setq js2-token-end js2-ts-cursor))) + +(defun js2-init-scanner (&optional buf line) + "Create token stream for BUF starting on LINE. +BUF defaults to current-buffer and line defaults to 1. + +A buffer can only have one scanner active at a time, which yields +dramatically simpler code than using a defstruct. If you need to +have simultaneous scanners in a buffer, copy the regions to scan +into temp buffers." + (save-excursion + (when buf + (set-buffer buf)) + (setq js2-ts-dirty-line nil + js2-ts-regexp-flags nil + js2-ts-string "" + js2-ts-number nil + js2-ts-hit-eof nil + js2-ts-line-start 0 + js2-ts-lineno (or line 1) + js2-ts-line-end-char -1 + js2-ts-cursor (point-min) + js2-ts-is-xml-attribute nil + js2-ts-xml-is-tag-content nil + js2-ts-xml-open-tags-count 0 + js2-ts-string-buffer nil))) + +;; This function uses the cached op, string and number fields in +;; TokenStream; if getToken has been called since the passed token +;; was scanned, the op or string printed may be incorrect. +(defun js2-token-to-string (token) + ;; Not sure where this function is used in Rhino. Not tested. + (if (not js2-debug-print-trees) + "" + (let ((name (js2-token-name token))) + (cond + ((memq token (list js2-STRING js2-REGEXP js2-NAME)) + (concat name " `" js2-ts-string "'")) + ((eq token js2-NUMBER) + (format "NUMBER %g" js2-ts-number)) + (t + name))))) + +(defconst js2-keywords + '(break + case catch const continue + debugger default delete do + else enum + false finally for function + if in instanceof import + let + new null + return + switch + this throw true try typeof + var void + while with + yield)) + +;; Token names aren't exactly the same as the keywords, unfortunately. +;; E.g. enum isn't in the tokens, and delete is js2-DELPROP. +(defconst js2-kwd-tokens + (let ((table (make-vector js2-num-tokens nil)) + (tokens + (list js2-BREAK + js2-CASE js2-CATCH js2-CONST js2-CONTINUE + js2-DEBUGGER js2-DEFAULT js2-DELPROP js2-DO + js2-ELSE + js2-FALSE js2-FINALLY js2-FOR js2-FUNCTION + js2-IF js2-IN js2-INSTANCEOF js2-IMPORT + js2-LET + js2-NEW js2-NULL + js2-RETURN + js2-SWITCH + js2-THIS js2-THROW js2-TRUE js2-TRY js2-TYPEOF + js2-VAR + js2-WHILE js2-WITH + js2-YIELD))) + (dolist (i tokens) + (aset table i 'font-lock-keyword-face)) + (aset table js2-STRING 'font-lock-string-face) + (aset table js2-REGEXP 'font-lock-string-face) + (aset table js2-COMMENT 'font-lock-comment-face) + (aset table js2-THIS 'font-lock-builtin-face) + (aset table js2-VOID 'font-lock-constant-face) + (aset table js2-NULL 'font-lock-constant-face) + (aset table js2-TRUE 'font-lock-constant-face) + (aset table js2-FALSE 'font-lock-constant-face) + table) + "Vector whose values are non-nil for tokens that are keywords. +The values are default faces to use for highlighting the keywords.") + +(defconst js2-reserved-words + '(abstract + boolean byte + char class + double + enum extends + final float + goto + implements int interface + long + native + package private protected public + short static super synchronized + throws transient + volatile)) + +(defconst js2-keyword-names + (let ((table (make-hash-table :test 'equal))) + (loop for k in js2-keywords + do (puthash + (symbol-name k) ; instanceof + (intern (concat "js2-" + (upcase (symbol-name k)))) ; js2-INSTANCEOF + table)) + table) + "JavaScript keywords by name, mapped to their symbols.") + +(defconst js2-reserved-word-names + (let ((table (make-hash-table :test 'equal))) + (loop for k in js2-reserved-words + do + (puthash (symbol-name k) 'js2-RESERVED table)) + table) + "JavaScript reserved words by name, mapped to 'js2-RESERVED.") + +(defsubst js2-collect-string (buf) + "Convert BUF, a list of chars, to a string. +Reverses BUF before converting." + (cond + ((stringp buf) + buf) + ((null buf) ; for emacs21 compat + "") + (t + (if buf + (apply #'string (nreverse buf)) + "")))) + +(defun js2-string-to-keyword (s) + "Return token for S, a string, if S is a keyword or reserved word. +Returns a symbol such as 'js2-BREAK, or nil if not keyword/reserved." + (or (gethash s js2-keyword-names) + (gethash s js2-reserved-word-names))) + +(defsubst js2-ts-set-char-token-bounds () + "Used when next token is one character." + (setq js2-token-beg (1- js2-ts-cursor) + js2-token-end js2-ts-cursor)) + +(defsubst js2-ts-return (token) + "Return an N-character TOKEN from `js2-get-token'. +Updates `js2-token-end' accordingly." + (setq js2-token-end js2-ts-cursor) + (throw 'return token)) + +(defsubst js2-x-digit-to-int (c accumulator) + "Build up a hex number. +If C is a hexadecimal digit, return ACCUMULATOR * 16 plus +corresponding number. Otherwise return -1." + (catch 'return + (catch 'check + ;; Use 0..9 < A..Z < a..z + (cond + ((<= c ?9) + (decf c ?0) + (if (<= 0 c) + (throw 'check nil))) + ((<= c ?F) + (when (<= ?A c) + (decf c (- ?A 10)) + (throw 'check nil))) + ((<= c ?f) + (when (<= ?a c) + (decf c (- ?a 10)) + (throw 'check nil)))) + (throw 'return -1)) + (logior c (lsh accumulator 4)))) + +(defun js2-get-token () + "Return next JavaScript token, an int such as js2-RETURN." + (let (c + c1 + identifier-start + is-unicode-escape-start + contains-escape + escape-val + escape-start + str + result + base + is-integer + quote-char + val + look-for-slash + continue) + (catch 'return + (while t + ;; Eat whitespace, possibly sensitive to newlines. + (setq continue t) + (while continue + (setq c (js2-get-char)) + (cond + ((eq c js2-EOF_CHAR) + (js2-ts-set-char-token-bounds) + (throw 'return js2-EOF)) + ((eq c ?\n) + (js2-ts-set-char-token-bounds) + (setq js2-ts-dirty-line nil) + (throw 'return js2-EOL)) + ((not (js2-js-space-p c)) + (if (/= c ?-) ; in case end of HTML comment + (setq js2-ts-dirty-line t)) + (setq continue nil)))) + + ;; Assume the token will be 1 char - fixed up below. + (js2-ts-set-char-token-bounds) + + (when (eq c ?@) + (throw 'return js2-XMLATTR)) + + ;; identifier/keyword/instanceof? + ;; watch out for starting with a <backslash> + (cond + ((eq c ?\\) + (setq c (js2-get-char)) + (if (eq c ?u) + (setq identifier-start t + is-unicode-escape-start t + js2-ts-string-buffer nil) + (setq identifier-start nil) + (js2-unget-char) + (setq c ?\\))) + (t + (when (setq identifier-start (js2-java-identifier-start-p c)) + (setq js2-ts-string-buffer nil) + (js2-add-to-string c)))) + + (when identifier-start + (setq contains-escape is-unicode-escape-start) + (catch 'break + (while t + (if is-unicode-escape-start + ;; strictly speaking we should probably push-back + ;; all the bad characters if the <backslash>uXXXX + ;; sequence is malformed. But since there isn't a + ;; correct context(is there?) for a bad Unicode + ;; escape sequence in an identifier, we can report + ;; an error here. + (progn + (setq escape-val 0) + (dotimes (i 4) + (setq c (js2-get-char) + escape-val (js2-x-digit-to-int c escape-val)) + ;; Next check takes care of c < 0 and bad escape + (if (minusp escape-val) + (throw 'break nil))) + (if (minusp escape-val) + (js2-report-scan-error "msg.invalid.escape" t)) + (js2-add-to-string escape-val) + (setq is-unicode-escape-start nil)) + (setq c (js2-get-char)) + (cond + ((eq c ?\\) + (setq c (js2-get-char)) + (if (eq c ?u) + (setq is-unicode-escape-start t + contains-escape t) + (js2-report-scan-error "msg.illegal.character" t))) + (t + (if (or (eq c js2-EOF_CHAR) + (not (js2-java-identifier-part-p c))) + (throw 'break nil)) + (js2-add-to-string c)))))) + (js2-unget-char) + + (setq str (js2-get-string-from-buffer)) + (unless contains-escape + ;; OPT we shouldn't have to make a string (object!) to + ;; check if it's a keyword. + + ;; Return the corresponding token if it's a keyword + (when (setq result (js2-string-to-keyword str)) + (if (and (< js2-language-version 170) + (memq result '(js2-LET js2-YIELD))) + ;; LET and YIELD are tokens only in 1.7 and later + (setq result 'js2-NAME)) + (if (neq result js2-RESERVED) + (throw 'return (js2-token-code result))) + (js2-report-warning "msg.reserved.keyword" str))) + + ;; If we want to intern these as Rhino does, just use (intern str) + (setq js2-ts-string str) + (throw 'return js2-NAME)) ; end identifier/kwd check + + ;; is it a number? + (when (or (js2-digit-p c) + (and (eq c ?.) (js2-digit-p (js2-peek-char)))) + (setq js2-ts-string-buffer nil + base 10) + (when (eq c ?0) + (setq c (js2-get-char)) + (cond + ((or (eq c ?x) (eq c ?X)) + (setq base 16) + (setq c (js2-get-char))) + ((js2-digit-p c) + (setq base 8)) + (t + (js2-add-to-string ?0)))) + + (if (eq base 16) + (while (<= 0 (js2-x-digit-to-int c 0)) + (js2-add-to-string c) + (setq c (js2-get-char))) + (while (and (<= ?0 c) (<= c ?9)) + ;; We permit 08 and 09 as decimal numbers, which + ;; makes our behavior a superset of the ECMA + ;; numeric grammar. We might not always be so + ;; permissive, so we warn about it. + (when (and (eq base 8) (>= c ?8)) + (js2-report-warning "msg.bad.octal.literal" + (if (eq c ?8) "8" "9")) + (setq base 10)) + (js2-add-to-string c) + (setq c (js2-get-char)))) + + (setq is-integer t) + + (when (and (eq base 10) (memq c '(?. ?e ?E))) + (setq is-integer nil) + (when (eq c ?.) + (loop do + (js2-add-to-string c) + (setq c (js2-get-char)) + while (js2-digit-p c))) + (when (memq c '(?e ?E)) + (js2-add-to-string c) + (setq c (js2-get-char)) + (when (memq c '(?+ ?-)) + (js2-add-to-string c) + (setq c (js2-get-char))) + (unless (js2-digit-p c) + (js2-report-scan-error "msg.missing.exponent" t)) + (loop do + (js2-add-to-string c) + (setq c (js2-get-char)) + while (js2-digit-p c)))) + + (js2-unget-char) + (setq js2-ts-string (js2-get-string-from-buffer) + js2-ts-number + (if (and (eq base 10) (not is-integer)) + (string-to-number js2-ts-string) + ;; TODO: call runtime number-parser. Some of it is in + ;; js2-util.el, but I need to port ScriptRuntime.stringToNumber. + (string-to-number js2-ts-string))) + (throw 'return js2-NUMBER)) + + ;; is it a string? + (when (memq c '(?\" ?\')) + ;; We attempt to accumulate a string the fast way, by + ;; building it directly out of the reader. But if there + ;; are any escaped characters in the string, we revert to + ;; building it out of a string buffer. + (setq quote-char c + js2-ts-string-buffer nil + c (js2-get-char)) + (catch 'break + (while (/= c quote-char) + (catch 'continue + (when (or (eq c ?\n) (eq c js2-EOF_CHAR)) + (js2-unget-char) + (setq js2-token-end js2-ts-cursor) + (js2-report-error "msg.unterminated.string.lit") + (throw 'return js2-STRING)) + + (when (eq c ?\\) + ;; We've hit an escaped character + (setq c (js2-get-char)) + (case c + (?b (setq c ?\b)) + (?f (setq c ?\f)) + (?n (setq c ?\n)) + (?r (setq c ?\r)) + (?t (setq c ?\t)) + (?v (setq c ?\v)) + (?u + (setq c1 (js2-read-unicode-escape)) + (if js2-parse-ide-mode + (if c1 + (progn + ;; just copy the string in IDE-mode + (js2-add-to-string ?\\) + (js2-add-to-string ?u) + (dotimes (i 3) + (js2-add-to-string (js2-get-char))) + (setq c (js2-get-char))) ; added at end of loop + ;; flag it as an invalid escape + (js2-report-warning "msg.invalid.escape" + nil (- js2-ts-cursor 2) 6)) + ;; Get 4 hex digits; if the u escape is not + ;; followed by 4 hex digits, use 'u' + the + ;; literal character sequence that follows. + (js2-add-to-string ?u) + (setq escape-val 0) + (dotimes (i 4) + (setq c (js2-get-char) + escape-val (js2-x-digit-to-int c escape-val)) + (if (minusp escape-val) + (throw 'continue nil)) + (js2-add-to-string c)) + ;; prepare for replace of stored 'u' sequence by escape value + (setq js2-ts-string-buffer (nthcdr 5 js2-ts-string-buffer) + c escape-val))) + (?x + ;; Get 2 hex digits, defaulting to 'x'+literal + ;; sequence, as above. + (setq c (js2-get-char) + escape-val (js2-x-digit-to-int c 0)) + (if (minusp escape-val) + (progn + (js2-add-to-string ?x) + (throw 'continue nil)) + (setq c1 c + c (js2-get-char) + escape-val (js2-x-digit-to-int c escape-val)) + (if (minusp escape-val) + (progn + (js2-add-to-string ?x) + (js2-add-to-string c1) + (throw 'continue nil)) + ;; got 2 hex digits + (setq c escape-val)))) + (?\n + ;; Remove line terminator after escape to follow + ;; SpiderMonkey and C/C++ + (setq c (js2-get-char)) + (throw 'continue nil)) + (t + (when (and (<= ?0 c) (< c ?8)) + (setq val (- c ?0) + c (js2-get-char)) + (when (and (<= ?0 c) (< c ?8)) + (setq val (- (+ (* 8 val) c) ?0) + c (js2-get-char)) + (when (and (<= ?0 c) + (< c ?8) + (< val #o37)) + ;; c is 3rd char of octal sequence only + ;; if the resulting val <= 0377 + (setq val (- (+ (* 8 val) c) ?0) + c (js2-get-char)))) + (js2-unget-char) + (setq c val))))) + (js2-add-to-string c) + (setq c (js2-get-char))))) + (setq js2-ts-string (js2-get-string-from-buffer)) + (throw 'return js2-STRING)) + + (case c + (?\; + (throw 'return js2-SEMI)) + (?\[ + (throw 'return js2-LB)) + (?\] + (throw 'return js2-RB)) + (?{ + (throw 'return js2-LC)) + (?} + (throw 'return js2-RC)) + (?\( + (throw 'return js2-LP)) + (?\) + (throw 'return js2-RP)) + (?, + (throw 'return js2-COMMA)) + (?? + (throw 'return js2-HOOK)) + (?: + (if (js2-match-char ?:) + (js2-ts-return js2-COLONCOLON) + (throw 'return js2-COLON))) + (?. + (if (js2-match-char ?.) + (js2-ts-return js2-DOTDOT) + (if (js2-match-char ?\() + (js2-ts-return js2-DOTQUERY) + (throw 'return js2-DOT)))) + (?| + (if (js2-match-char ?|) + (throw 'return js2-OR) + (if (js2-match-char ?=) + (js2-ts-return js2-ASSIGN_BITOR) + (throw 'return js2-BITOR)))) + (?^ + (if (js2-match-char ?=) + (js2-ts-return js2-ASSIGN_BITOR) + (throw 'return js2-BITXOR))) + (?& + (if (js2-match-char ?&) + (throw 'return js2-AND) + (if (js2-match-char ?=) + (js2-ts-return js2-ASSIGN_BITAND) + (throw 'return js2-BITAND)))) + (?= + (if (js2-match-char ?=) + (if (js2-match-char ?=) + (js2-ts-return js2-SHEQ) + (throw 'return js2-EQ)) + (throw 'return js2-ASSIGN))) + (?! + (if (js2-match-char ?=) + (if (js2-match-char ?=) + (js2-ts-return js2-SHNE) + (js2-ts-return js2-NE)) + (throw 'return js2-NOT))) + (?< + ;; NB:treat HTML begin-comment as comment-till-eol + (when (js2-match-char ?!) + (when (js2-match-char ?-) + (when (js2-match-char ?-) + (js2-skip-line) + (setq js2-ts-comment-type 'html) + (throw 'return js2-COMMENT))) + (js2-unget-char)) + + (if (js2-match-char ?<) + (if (js2-match-char ?=) + (js2-ts-return js2-ASSIGN_LSH) + (js2-ts-return js2-LSH)) + (if (js2-match-char ?=) + (js2-ts-return js2-LE) + (throw 'return js2-LT)))) + (?> + (if (js2-match-char ?>) + (if (js2-match-char ?>) + (if (js2-match-char ?=) + (js2-ts-return js2-ASSIGN_URSH) + (js2-ts-return js2-URSH)) + (if (js2-match-char ?=) + (js2-ts-return js2-ASSIGN_RSH) + (js2-ts-return js2-RSH))) + (if (js2-match-char ?=) + (js2-ts-return js2-GE) + (throw 'return js2-GT)))) + (?* + (if (js2-match-char ?=) + (js2-ts-return js2-ASSIGN_MUL) + (throw 'return js2-MUL))) + + (?/ + ;; is it a // comment? + (when (js2-match-char ?/) + (setq js2-token-beg (- js2-ts-cursor 2)) + (js2-skip-line) + (setq js2-ts-comment-type 'line) + (throw 'return js2-COMMENT)) + + ;; is it a /* comment? + (when (js2-match-char ?*) + (setq look-for-slash nil + js2-token-beg (- js2-ts-cursor 2) + js2-ts-comment-type + (if (js2-match-char ?*) + (progn + (setq look-for-slash t) + 'jsdoc) + 'block)) + (while t + (setq c (js2-get-char)) + (cond + ((eq c js2-EOF_CHAR) + (setq js2-token-end (1- js2-ts-cursor)) + (js2-report-error "msg.unterminated.comment") + (throw 'return js2-COMMENT)) + ((eq c ?*) + (setq look-for-slash t)) + ((eq c ?/) + (if look-for-slash + (js2-ts-return js2-COMMENT))) + (t + (setq look-for-slash nil + js2-token-end js2-ts-cursor))))) + + (if (js2-match-char ?=) + (js2-ts-return js2-ASSIGN_DIV) + (throw 'return js2-DIV))) + + (?# + (when js2-skip-preprocessor-directives + (js2-skip-line) + (setq js2-ts-comment-type 'preprocessor + js2-token-end js2-ts-cursor) + (throw 'return js2-COMMENT)) + (throw 'return js2-ERROR)) + + (?% + (if (js2-match-char ?=) + (js2-ts-return js2-ASSIGN_MOD) + (throw 'return js2-MOD))) + (?~ + (throw 'return js2-BITNOT)) + (?+ + (if (js2-match-char ?=) + (js2-ts-return js2-ASSIGN_ADD) + (if (js2-match-char ?+) + (js2-ts-return js2-INC) + (throw 'return js2-ADD)))) + (?- + (cond + ((js2-match-char ?=) + (setq c js2-ASSIGN_SUB)) + ((js2-match-char ?-) + (unless js2-ts-dirty-line + ;; treat HTML end-comment after possible whitespace + ;; after line start as comment-until-eol + (when (js2-match-char ?>) + (js2-skip-line) + (setq js2-ts-comment-type 'html) + (throw 'return js2-COMMENT))) + (setq c js2-DEC)) + (t + (setq c js2-SUB))) + (setq js2-ts-dirty-line t) + (js2-ts-return c)) + + (otherwise + (js2-report-scan-error "msg.illegal.character"))))))) + +(defun js2-read-regexp (start-token) + "Called by parser when it gets / or /= in literal context." + (let (c + err + in-class ; inside a '[' .. ']' character-class + flags + (continue t)) + (setq js2-token-beg js2-ts-cursor + js2-ts-string-buffer nil + js2-ts-regexp-flags nil) + + (if (eq start-token js2-ASSIGN_DIV) + ;; mis-scanned /= + (js2-add-to-string ?=) + (if (neq start-token js2-DIV) + (error "failed assertion"))) + + (while (and (not err) + (or (/= (setq c (js2-get-char)) ?/) + in-class)) + (cond + ((or (= c ?\n) + (= c js2-EOF_CHAR)) + (setq js2-token-end (1- js2-ts-cursor) + err t + js2-ts-string (js2-collect-string js2-ts-string-buffer)) + (js2-report-error "msg.unterminated.re.lit")) + (t (cond + ((= c ?\\) + (js2-add-to-string c) + (setq c (js2-get-char))) + + ((= c ?\[) + (setq in-class t)) + + ((= c ?\]) + (setq in-class nil))) + (js2-add-to-string c)))) + + (unless err + (while continue + (cond + ((js2-match-char ?g) + (push ?g flags)) + ((js2-match-char ?i) + (push ?i flags)) + ((js2-match-char ?m) + (push ?m flags)) + (t + (setq continue nil)))) + (if (js2-alpha-p (js2-peek-char)) + (js2-report-scan-error "msg.invalid.re.flag" t + js2-ts-cursor 1)) + (setq js2-ts-string (js2-collect-string js2-ts-string-buffer) + js2-ts-regexp-flags (js2-collect-string flags) + js2-token-end js2-ts-cursor) + ;; tell `parse-partial-sexp' to ignore this range of chars + (put-text-property js2-token-beg js2-token-end 'syntax-class '(2))))) + +(defun js2-get-first-xml-token () + (setq js2-ts-xml-open-tags-count 0 + js2-ts-is-xml-attribute nil + js2-ts-xml-is-tag-content nil) + (js2-unget-char) + (js2-get-next-xml-token)) + +(defsubst js2-xml-discard-string () + "Throw away the string in progress and flag an XML parse error." + (setq js2-ts-string-buffer nil + js2-ts-string nil) + (js2-report-scan-error "msg.XML.bad.form" t)) + +(defun js2-get-next-xml-token () + (setq js2-ts-string-buffer nil ; for recording the XML + js2-token-beg js2-ts-cursor) + (let (c result) + (setq result + (catch 'return + (while t + (setq c (js2-get-char)) + (cond + ((= c js2-EOF_CHAR) + (throw 'return js2-ERROR)) + + (js2-ts-xml-is-tag-content + (case c + (?> + (js2-add-to-string c) + (setq js2-ts-xml-is-tag-content nil + js2-ts-is-xml-attribute nil)) + (?/ + (js2-add-to-string c) + (when (eq ?> (js2-peek-char)) + (setq c (js2-get-char)) + (js2-add-to-string c) + (setq js2-ts-xml-is-tag-content nil) + (decf js2-ts-xml-open-tags-count))) + (?{ + (js2-unget-char) + (setq js2-ts-string (js2-get-string-from-buffer)) + (throw 'return js2-XML)) + ((?\' ?\") + (js2-add-to-string c) + (unless (js2-read-quoted-string c) + (throw 'return js2-ERROR))) + (?= + (js2-add-to-string c) + (setq js2-ts-is-xml-attribute t)) + ((? ?\t ?\r ?\n) + (js2-add-to-string c)) + (t + (js2-add-to-string c) + (setq js2-ts-is-xml-attribute nil))) + (when (and (not js2-ts-xml-is-tag-content) + (zerop js2-ts-xml-open-tags-count)) + (setq js2-ts-string (js2-get-string-from-buffer)) + (throw 'return js2-XMLEND))) + + (t + ;; else not tag content + (case c + (?< + (js2-add-to-string c) + (setq c (js2-peek-char)) + (case c + (?! + (setq c (js2-get-char)) ;; skip ! + (js2-add-to-string c) + (setq c (js2-peek-char)) + (case c + (?- + (setq c (js2-get-char)) ;; skip - + (js2-add-to-string c) + (if (eq c ?-) + (progn + (js2-add-to-string c) + (unless (js2-read-xml-comment) + (throw 'return js2-ERROR))) + (js2-xml-discard-string) + (throw 'return js2-ERROR))) + (?\[ + (setq c (js2-get-char)) ;; skip [ + (js2-add-to-string c) + (if (and (= (js2-get-char) ?C) + (= (js2-get-char) ?D) + (= (js2-get-char) ?A) + (= (js2-get-char) ?T) + (= (js2-get-char) ?A) + (= (js2-get-char) ?\[)) + (progn + (js2-add-to-string ?C) + (js2-add-to-string ?D) + (js2-add-to-string ?A) + (js2-add-to-string ?T) + (js2-add-to-string ?A) + (js2-add-to-string ?\[) + (unless (js2-read-cdata) + (throw 'return js2-ERROR))) + (js2-xml-discard-string) + (throw 'return js2-ERROR))) + (t + (unless (js2-read-entity) + (throw 'return js2-ERROR))))) + (?? + (setq c (js2-get-char)) ;; skip ? + (js2-add-to-string c) + (unless (js2-read-PI) + (throw 'return js2-ERROR))) + (?/ + ;; end tag + (setq c (js2-get-char)) ;; skip / + (js2-add-to-string c) + (when (zerop js2-ts-xml-open-tags-count) + (js2-xml-discard-string) + (throw 'return js2-ERROR)) + (setq js2-ts-xml-is-tag-content t) + (decf js2-ts-xml-open-tags-count)) + (t + ;; start tag + (setq js2-ts-xml-is-tag-content t) + (incf js2-ts-xml-open-tags-count)))) + (?{ + (js2-unget-char) + (setq js2-ts-string (js2-get-string-from-buffer)) + (throw 'return js2-XML)) + (t + (js2-add-to-string c)))))))) + (setq js2-token-end js2-ts-cursor) + result)) + +(defun js2-read-quoted-string (quote) + (let (c) + (catch 'return + (while (/= (setq c (js2-get-char)) js2-EOF_CHAR) + (js2-add-to-string c) + (if (eq c quote) + (throw 'return t))) + (js2-xml-discard-string) ;; throw away string in progress + nil))) + +(defun js2-read-xml-comment () + (let ((c (js2-get-char))) + (catch 'return + (while (/= c js2-EOF_CHAR) + (catch 'continue + (js2-add-to-string c) + (when (and (eq c ?-) (eq ?- (js2-peek-char))) + (setq c (js2-get-char)) + (js2-add-to-string c) + (if (eq (js2-peek-char) ?>) + (progn + (setq c (js2-get-char)) ;; skip > + (js2-add-to-string c) + (throw 'return t)) + (throw 'continue nil))) + (setq c (js2-get-char)))) + (js2-xml-discard-string) + nil))) + +(defun js2-read-cdata () + (let ((c (js2-get-char))) + (catch 'return + (while (/= c js2-EOF_CHAR) + (catch 'continue + (js2-add-to-string c) + (when (and (eq c ?\]) (eq (js2-peek-char) ?\])) + (setq c (js2-get-char)) + (js2-add-to-string c) + (if (eq (js2-peek-char) ?>) + (progn + (setq c (js2-get-char)) ;; Skip > + (js2-add-to-string c) + (throw 'return t)) + (throw 'continue nil))) + (setq c (js2-get-char)))) + (js2-xml-discard-string) + nil))) + +(defun js2-read-entity () + (let ((decl-tags 1) + c) + (catch 'return + (while (/= js2-EOF_CHAR (setq c (js2-get-char))) + (js2-add-to-string c) + (case c + (?< + (incf decl-tags)) + (?> + (decf decl-tags) + (if (zerop decl-tags) + (throw 'return t))))) + (js2-xml-discard-string) + nil))) + +(defun js2-read-PI () + "Scan an XML processing instruction." + (let (c) + (catch 'return + (while (/= js2-EOF_CHAR (setq c (js2-get-char))) + (js2-add-to-string c) + (when (and (eq c ??) (eq (js2-peek-char) ?>)) + (setq c (js2-get-char)) ;; Skip > + (js2-add-to-string c) + (throw 'return t))) + (js2-xml-discard-string) + nil))) + +(defun js2-scanner-get-line () + "Return the text of the current scan line." + (buffer-substring (point-at-bol) (point-at-eol))) + +(provide 'js2-scan) + +;;; js2-scan.el ends here +;;; js2-messages: localizable messages for js2-mode + +;; Author: Steve Yegge (steve.yegge@gmail.com) +;; Keywords: javascript languages + +;;; Commentary: + +;; Messages are copied from Rhino's Messages.properties. +;; Many of the Java-specific messages have been elided. +;; Add any js2-specific ones at the end, so we can keep +;; this file synced with changes to Rhino's. +;; +;; TODO: +;; - move interpreter messages into separate file + +;;; Code: + +(defvar js2-message-table + (make-hash-table :test 'equal :size 250) + "Contains localized messages for js2-mode.") + +;; TODO: construct this hashtable at compile-time. +(defmacro js2-msg (key &rest strings) + `(puthash ,key (funcall #'concat ,@strings) + js2-message-table)) + +(defun js2-get-msg (msg-key) + "Look up a localized message. +MSG-KEY is a list of (MSG ARGS). If the message takes parameters, +the correct number of ARGS must be provided." + (let* ((key (if (listp msg-key) (car msg-key) msg-key)) + (args (if (listp msg-key) (cdr msg-key))) + (msg (gethash key js2-message-table))) + (if msg + (apply #'format msg args) + key))) ; default to showing the key + +(js2-msg "msg.dup.parms" + "Duplicate parameter name '%s'.") + +(js2-msg "msg.too.big.jump" + "Program too complex: jump offset too big.") + +(js2-msg "msg.too.big.index" + "Program too complex: internal index exceeds 64K limit.") + +(js2-msg "msg.while.compiling.fn" + "Encountered code generation error while compiling function '%s': %s") + +(js2-msg "msg.while.compiling.script" + "Encountered code generation error while compiling script: %s") + +;; Context +(js2-msg "msg.ctor.not.found" + "Constructor for '%s' not found.") + +(js2-msg "msg.not.ctor" + "'%s' is not a constructor.") + +;; FunctionObject +(js2-msg "msg.varargs.ctor" + "Method or constructor '%s' must be static " + "with the signature (Context cx, Object[] args, " + "Function ctorObj, boolean inNewExpr) " + "to define a variable arguments constructor.") + +(js2-msg "msg.varargs.fun" + "Method '%s' must be static with the signature " + "(Context cx, Scriptable thisObj, Object[] args, Function funObj) " + "to define a variable arguments function.") + +(js2-msg "msg.incompat.call" + "Method '%s' called on incompatible object.") + +(js2-msg "msg.bad.parms" + "Unsupported parameter type '%s' in method '%s'.") + +(js2-msg "msg.bad.method.return" + "Unsupported return type '%s' in method '%s'.") + +(js2-msg "msg.bad.ctor.return" + "Construction of objects of type '%s' is not supported.") + +(js2-msg "msg.no.overload" + "Method '%s' occurs multiple times in class '%s'.") + +(js2-msg "msg.method.not.found" + "Method '%s' not found in '%s'.") + +;; IRFactory + +(js2-msg "msg.bad.for.in.lhs" + "Invalid left-hand side of for..in loop.") + +(js2-msg "msg.mult.index" + "Only one variable allowed in for..in loop.") + +(js2-msg "msg.bad.for.in.destruct" + "Left hand side of for..in loop must be an array of " + "length 2 to accept key/value pair.") + +(js2-msg "msg.cant.convert" + "Can't convert to type '%s'.") + +(js2-msg "msg.bad.assign.left" + "Invalid assignment left-hand side.") + +(js2-msg "msg.bad.decr" + "Invalid decerement operand.") + +(js2-msg "msg.bad.incr" + "Invalid increment operand.") + +(js2-msg "msg.bad.yield" + "yield must be in a function.") + +(js2-msg "msg.yield.parenthesized" + "yield expression must be parenthesized.") + +;; NativeGlobal +(js2-msg "msg.cant.call.indirect" + "Function '%s' must be called directly, and not by way of a " + "function of another name.") + +(js2-msg "msg.eval.nonstring" + "Calling eval() with anything other than a primitive " + "string value will simply return the value. " + "Is this what you intended?") + +(js2-msg "msg.eval.nonstring.strict" + "Calling eval() with anything other than a primitive " + "string value is not allowed in strict mode.") + +(js2-msg "msg.bad.destruct.op" + "Invalid destructuring assignment operator") + +;; NativeCall +(js2-msg "msg.only.from.new" + "'%s' may only be invoked from a `new' expression.") + +(js2-msg "msg.deprec.ctor" + "The '%s' constructor is deprecated.") + +;; NativeFunction +(js2-msg "msg.no.function.ref.found" + "no source found to decompile function reference %s") + +(js2-msg "msg.arg.isnt.array" + "second argument to Function.prototype.apply must be an array") + +;; NativeGlobal +(js2-msg "msg.bad.esc.mask" + "invalid string escape mask") + +;; NativeRegExp +(js2-msg "msg.bad.quant" + "Invalid quantifier %s") + +(js2-msg "msg.overlarge.backref" + "Overly large back reference %s") + +(js2-msg "msg.overlarge.min" + "Overly large minimum %s") + +(js2-msg "msg.overlarge.max" + "Overly large maximum %s") + +(js2-msg "msg.zero.quant" + "Zero quantifier %s") + +(js2-msg "msg.max.lt.min" + "Maximum %s less than minimum") + +(js2-msg "msg.unterm.quant" + "Unterminated quantifier %s") + +(js2-msg "msg.unterm.paren" + "Unterminated parenthetical %s") + +(js2-msg "msg.unterm.class" + "Unterminated character class %s") + +(js2-msg "msg.bad.range" + "Invalid range in character class.") + +(js2-msg "msg.trail.backslash" + "Trailing \\ in regular expression.") + +(js2-msg "msg.re.unmatched.right.paren" + "unmatched ) in regular expression.") + +(js2-msg "msg.no.regexp" + "Regular expressions are not available.") + +(js2-msg "msg.bad.backref" + "back-reference exceeds number of capturing parentheses.") + +(js2-msg "msg.bad.regexp.compile" + "Only one argument may be specified if the first " + "argument to RegExp.prototype.compile is a RegExp object.") + +;; Parser +(js2-msg "msg.got.syntax.errors" + "Compilation produced %s syntax errors.") + +(js2-msg "msg.var.redecl" + "TypeError: redeclaration of var %s.") + +(js2-msg "msg.const.redecl" + "TypeError: redeclaration of const %s.") + +(js2-msg "msg.let.redecl" + "TypeError: redeclaration of variable %s.") + +(js2-msg "msg.parm.redecl" + "TypeError: redeclaration of formal parameter %s.") + +(js2-msg "msg.fn.redecl" + "TypeError: redeclaration of function %s.") + +(js2-msg "msg.let.decl.not.in.block" + "SyntaxError: let declaration not directly within block") + +;; NodeTransformer +(js2-msg "msg.dup.label" + "duplicated label") + +(js2-msg "msg.undef.label" + "undefined label") + +(js2-msg "msg.bad.break" + "unlabelled break must be inside loop or switch") + +(js2-msg "msg.continue.outside" + "continue must be inside loop") + +(js2-msg "msg.continue.nonloop" + "continue can only use labels of iteration statements") + +(js2-msg "msg.bad.throw.eol" + "Line terminator is not allowed between the throw " + "keyword and throw expression.") + +(js2-msg "msg.no.paren.parms" + "missing ( before function parameters.") + +(js2-msg "msg.no.parm" + "missing formal parameter") + +(js2-msg "msg.no.paren.after.parms" + "missing ) after formal parameters") + +(js2-msg "msg.no.brace.body" + "missing '{' before function body") + +(js2-msg "msg.no.brace.after.body" + "missing } after function body") + +(js2-msg "msg.no.paren.cond" + "missing ( before condition") + +(js2-msg "msg.no.paren.after.cond" + "missing ) after condition") + +(js2-msg "msg.no.semi.stmt" + "missing ; before statement") + +(js2-msg "msg.missing.semi" + "missing ; after statement") + +(js2-msg "msg.no.name.after.dot" + "missing name after . operator") + +(js2-msg "msg.no.name.after.coloncolon" + "missing name after :: operator") + +(js2-msg "msg.no.name.after.dotdot" + "missing name after .. operator") + +(js2-msg "msg.no.name.after.xmlAttr" + "missing name after .@") + +(js2-msg "msg.no.bracket.index" + "missing ] in index expression") + +(js2-msg "msg.no.paren.switch" + "missing ( before switch expression") + +(js2-msg "msg.no.paren.after.switch" + "missing ) after switch expression") + +(js2-msg "msg.no.brace.switch" + "missing '{' before switch body") + +(js2-msg "msg.bad.switch" + "invalid switch statement") + +(js2-msg "msg.no.colon.case" + "missing : after case expression") + +(js2-msg "msg.double.switch.default" + "double default label in the switch statement") + +(js2-msg "msg.no.while.do" + "missing while after do-loop body") + +(js2-msg "msg.no.paren.for" + "missing ( after for") + +(js2-msg "msg.no.semi.for" + "missing ; after for-loop initializer") + +(js2-msg "msg.no.semi.for.cond" + "missing ; after for-loop condition") + +(js2-msg "msg.in.after.for.name" + "missing in after for") + +(js2-msg "msg.no.paren.for.ctrl" + "missing ) after for-loop control") + +(js2-msg "msg.no.paren.with" + "missing ( before with-statement object") + +(js2-msg "msg.no.paren.after.with" + "missing ) after with-statement object") + +(js2-msg "msg.no.paren.after.let" + "missing ( after let") + +(js2-msg "msg.no.paren.let" + "missing ) after variable list") + +(js2-msg "msg.no.curly.let" + "missing } after let statement") + +(js2-msg "msg.bad.return" + "invalid return") + +(js2-msg "msg.no.brace.block" + "missing } in compound statement") + +(js2-msg "msg.bad.label" + "invalid label") + +(js2-msg "msg.bad.var" + "missing variable name") + +(js2-msg "msg.bad.var.init" + "invalid variable initialization") + +(js2-msg "msg.no.colon.cond" + "missing : in conditional expression") + +(js2-msg "msg.no.paren.arg" + "missing ) after argument list") + +(js2-msg "msg.no.bracket.arg" + "missing ] after element list") + +(js2-msg "msg.bad.prop" + "invalid property id") + +(js2-msg "msg.no.colon.prop" + "missing : after property id") + +(js2-msg "msg.no.brace.prop" + "missing } after property list") + +(js2-msg "msg.no.paren" + "missing ) in parenthetical") + +(js2-msg "msg.reserved.id" + "identifier is a reserved word") + +(js2-msg "msg.no.paren.catch" + "missing ( before catch-block condition") + +(js2-msg "msg.bad.catchcond" + "invalid catch block condition") + +(js2-msg "msg.catch.unreachable" + "any catch clauses following an unqualified catch are unreachable") + +(js2-msg "msg.no.brace.try" + "missing '{' before try block") + +(js2-msg "msg.no.brace.catchblock" + "missing '{' before catch-block body") + +(js2-msg "msg.try.no.catchfinally" + "'try' without 'catch' or 'finally'") + +(js2-msg "msg.no.return.value" + "function %s does not always return a value") + +(js2-msg "msg.anon.no.return.value" + "anonymous function does not always return a value") + +(js2-msg "msg.return.inconsistent" + "return statement is inconsistent with previous usage") + +(js2-msg "msg.generator.returns" + "TypeError: generator function '%s' returns a value") + +(js2-msg "msg.anon.generator.returns" + "TypeError: anonymous generator function returns a value") + +(js2-msg "msg.syntax" + "syntax error") + +(js2-msg "msg.unexpected.eof" + "Unexpected end of file") + +(js2-msg "msg.XML.bad.form" + "illegally formed XML syntax") + +(js2-msg "msg.XML.not.available" + "XML runtime not available") + +(js2-msg "msg.too.deep.parser.recursion" + "Too deep recursion while parsing") + +(js2-msg "msg.no.side.effects" + "Code has no side effects") + +(js2-msg "msg.extra.trailing.comma" + "Trailing comma is not legal in an ECMA-262 object initializer") + +(js2-msg "msg.array.trailing.comma" + "Trailing comma yields different behavior across browsers") + +(js2-msg "msg.equal.as.assign" + (concat "Test for equality (==) mistyped as assignment (=)?" + " (parenthesize to suppress warning)")) + +(js2-msg "msg.var.hides.arg" + "Variable %s hides argument") + +(js2-msg "msg.destruct.assign.no.init" + "Missing = in destructuring declaration") + +;; ScriptRuntime +(js2-msg "msg.no.properties" + "%s has no properties.") + +(js2-msg "msg.invalid.iterator" + "Invalid iterator value") + +(js2-msg "msg.iterator.primitive" + "__iterator__ returned a primitive value") + +(js2-msg "msg.assn.create.strict" + "Assignment to undeclared variable %s") + +(js2-msg "msg.ref.undefined.prop" + "Reference to undefined property '%s'") + +(js2-msg "msg.prop.not.found" + "Property %s not found.") + +(js2-msg "msg.invalid.type" + "Invalid JavaScript value of type %s") + +(js2-msg "msg.primitive.expected" + "Primitive type expected (had %s instead)") + +(js2-msg "msg.namespace.expected" + "Namespace object expected to left of :: (found %s instead)") + +(js2-msg "msg.null.to.object" + "Cannot convert null to an object.") + +(js2-msg "msg.undef.to.object" + "Cannot convert undefined to an object.") + +(js2-msg "msg.cyclic.value" + "Cyclic %s value not allowed.") + +(js2-msg "msg.is.not.defined" + "'%s' is not defined.") + +(js2-msg "msg.undef.prop.read" + "Cannot read property '%s' from %s") + +(js2-msg "msg.undef.prop.write" + "Cannot set property '%s' of %s to '%s'") + +(js2-msg "msg.undef.prop.delete" + "Cannot delete property '%s' of %s") + +(js2-msg "msg.undef.method.call" + "Cannot call method '%s' of %s") + +(js2-msg "msg.undef.with" + "Cannot apply 'with' to %s") + +(js2-msg "msg.isnt.function" + "%s is not a function, it is %s.") + +(js2-msg "msg.isnt.function.in" + "Cannot call property %s in object %s. " + "It is not a function, it is '%s'.") + +(js2-msg "msg.function.not.found" + "Cannot find function %s.") + +(js2-msg "msg.function.not.found.in" + "Cannot find function %s in object %s.") + +(js2-msg "msg.isnt.xml.object" + "%s is not an xml object.") + +(js2-msg "msg.no.ref.to.get" + "%s is not a reference to read reference value.") + +(js2-msg "msg.no.ref.to.set" + "%s is not a reference to set reference value to %s.") + +(js2-msg "msg.no.ref.from.function" + "Function %s can not be used as the left-hand " + "side of assignment or as an operand of ++ or -- operator.") + +(js2-msg "msg.bad.default.value" + "Object's getDefaultValue() method returned an object.") + +(js2-msg "msg.instanceof.not.object" + "Can't use instanceof on a non-object.") + +(js2-msg "msg.instanceof.bad.prototype" + "'prototype' property of %s is not an object.") + +(js2-msg "msg.bad.radix" + "illegal radix %s.") + +;; ScriptableObject +(js2-msg "msg.default.value" + "Cannot find default value for object.") + +(js2-msg "msg.zero.arg.ctor" + "Cannot load class '%s' which has no zero-parameter constructor.") + +(js2-msg "msg.ctor.multiple.parms" + "Can't define constructor or class %s since more than " + "one constructor has multiple parameters.") + +(js2-msg "msg.extend.scriptable" + "%s must extend ScriptableObject in order to define property %s.") + +(js2-msg "msg.bad.getter.parms" + "In order to define a property, getter %s must have zero " + "parameters or a single ScriptableObject parameter.") + +(js2-msg "msg.obj.getter.parms" + "Expected static or delegated getter %s to take " + "a ScriptableObject parameter.") + +(js2-msg "msg.getter.static" + "Getter and setter must both be static or neither be static.") + +(js2-msg "msg.setter.return" + "Setter must have void return type: %s") + +(js2-msg "msg.setter2.parms" + "Two-parameter setter must take a ScriptableObject as " + "its first parameter.") + +(js2-msg "msg.setter1.parms" + "Expected single parameter setter for %s") + +(js2-msg "msg.setter2.expected" + "Expected static or delegated setter %s to take two parameters.") + +(js2-msg "msg.setter.parms" + "Expected either one or two parameters for setter.") + +(js2-msg "msg.setter.bad.type" + "Unsupported parameter type '%s' in setter '%s'.") + +(js2-msg "msg.add.sealed" + "Cannot add a property to a sealed object: %s.") + +(js2-msg "msg.remove.sealed" + "Cannot remove a property from a sealed object: %s.") + +(js2-msg "msg.modify.sealed" + "Cannot modify a property of a sealed object: %s.") + +(js2-msg "msg.modify.readonly" + "Cannot modify readonly property: %s.") + +;; TokenStream +(js2-msg "msg.missing.exponent" + "missing exponent") + +(js2-msg "msg.caught.nfe" + "number format error") + +(js2-msg "msg.unterminated.string.lit" + "unterminated string literal") + +(js2-msg "msg.unterminated.comment" + "unterminated comment") + +(js2-msg "msg.unterminated.re.lit" + "unterminated regular expression literal") + +(js2-msg "msg.invalid.re.flag" + "invalid flag after regular expression") + +(js2-msg "msg.no.re.input.for" + "no input for %s") + +(js2-msg "msg.illegal.character" + "illegal character") + +(js2-msg "msg.invalid.escape" + "invalid Unicode escape sequence") + +(js2-msg "msg.bad.namespace" + "not a valid default namespace statement. " + "Syntax is: default xml namespace = EXPRESSION;") + +;; TokensStream warnings +(js2-msg "msg.bad.octal.literal" + "illegal octal literal digit %s; " + "interpreting it as a decimal digit") + +(js2-msg "msg.reserved.keyword" + "illegal usage of future reserved keyword %s; " + "interpreting it as ordinary identifier") + +(js2-msg "msg.script.is.not.constructor" + "Script objects are not constructors.") + +;; Arrays +(js2-msg "msg.arraylength.bad" + "Inappropriate array length.") + +;; Arrays +(js2-msg "msg.arraylength.too.big" + "Array length %s exceeds supported capacity limit.") + +;; URI +(js2-msg "msg.bad.uri" + "Malformed URI sequence.") + +;; Number +(js2-msg "msg.bad.precision" + "Precision %s out of range.") + +;; NativeGenerator +(js2-msg "msg.send.newborn" + "Attempt to send value to newborn generator") + +(js2-msg "msg.already.exec.gen" + "Already executing generator") + +(js2-msg "msg.StopIteration.invalid" + "StopIteration may not be changed to an arbitrary object.") + +;; Interpreter +(js2-msg "msg.yield.closing" + "Yield from closing generator") + +(provide 'js2-messages) +;;; js2-ast.el --- JavaScript syntax tree node definitions + +;; Author: Steve Yegge (steve.yegge@gmail.com) +;; Keywords: javascript languages + +;;; Code: + +(eval-and-compile + (require 'cl)) + + +;; flags for ast node property 'member-type (used for e4x operators) +(defvar js2-property-flag #x1 "property access: element is valid name") +(defvar js2-attribute-flag #x2 "x.@y or x..@y") +(defvar js2-descendants-flag #x4 "x..y or x..@i") + +(defsubst js2-relpos (pos anchor) + "Convert POS to be relative to ANCHOR. +If POS is nil, returns nil." + (and pos (- pos anchor))) + +(defsubst js2-make-pad (indent) + (if (zerop indent) + "" + (make-string (* indent js2-basic-offset) ? ))) + +(defsubst js2-visit-ast (node callback) + "Visit every node in ast NODE with visitor CALLBACK. + +CALLBACK is a function that takes two arguments: (NODE END-P). It is +called twice: once to visit the node, and again after all the node's +children have been processed. The END-P argument is nil on the first +call and non-nil on the second call. The return value of the callback +affects the traversal: if non-nil, the children of NODE are processed. +If the callback returns nil, or if the node has no children, then the +callback is called immediately with a non-nil END-P argument. + +The node traversal is approximately lexical-order, although there +are currently no guarantees around this." + (let ((vfunc (get (aref node 0) 'js2-visitor))) + ;; visit the node + (when (funcall callback node nil) + ;; visit the kids + (cond + ((eq vfunc 'js2-visit-none) + nil) ; don't even bother calling it + ;; Each AST node type has to define a `js2-visitor' function + ;; that takes a node and a callback, and calls `js2-visit-ast' + ;; on each child of the node. + (vfunc + (funcall vfunc node callback)) + (t + (error "%s does not define a visitor-traversal function" + (aref node 0))))) + ;; call the end-visit + (funcall callback node t))) + +(defstruct (js2-node + (:constructor nil)) ; abstract + "Base AST node type." + (type -1) ; token type + (pos -1) ; start position of this AST node in parsed input + (len 1) ; num characters spanned by the node + props ; optional node property list (an alist) + parent) ; link to parent node; null for root + +(defsubst js2-node-get-prop (node prop &optional default) + (or (cadr (assoc prop (js2-node-props node))) default)) + +(defsubst js2-node-set-prop (node prop value) + (setf (js2-node-props node) + (cons (list prop value) (js2-node-props node)))) + +(defsubst js2-fixup-starts (n nodes) + "Adjust the start positions of NODES to be relative to N. +Any node in the list may be nil, for convenience." + (dolist (node nodes) + (when node + (setf (js2-node-pos node) (- (js2-node-pos node) + (js2-node-pos n)))))) + +(defsubst js2-node-add-children (parent &rest nodes) + "Set parent node of NODES to PARENT, and return PARENT. +Does nothing if we're not recording parent links. +If any given node in NODES is nil, doesn't record that link." + (js2-fixup-starts parent nodes) + (dolist (node nodes) + (and node + (setf (js2-node-parent node) parent)))) + +;; Non-recursive since it's called a frightening number of times. +(defsubst js2-node-abs-pos (n) + (let ((pos (js2-node-pos n))) + (while (setq n (js2-node-parent n)) + (setq pos (+ pos (js2-node-pos n)))) + pos)) + +(defsubst js2-node-abs-end (n) + "Return absolute buffer position of end of N." + (+ (js2-node-abs-pos n) (js2-node-len n))) + +;; It's important to make sure block nodes have a lisp list for the +;; child nodes, to limit printing recursion depth in an AST that +;; otherwise consists of defstruct vectors. Emacs will crash printing +;; a sufficiently large vector tree. + +(defstruct (js2-block-node + (:include js2-node) + (:constructor nil) + (:constructor make-js2-block-node (&key (type js2-BLOCK) + (pos js2-token-beg) + len + props + kids))) + "A block of statements." + kids) ; a lisp list of the child statement nodes + +(put 'cl-struct-js2-block-node 'js2-visitor 'js2-visit-block) +(put 'cl-struct-js2-block-node 'js2-printer 'js2-print-block) + +(defsubst js2-visit-block (ast callback) + "Visit the `js2-block-node' children of AST." + (dolist (kid (js2-block-node-kids ast)) + (js2-visit-ast kid callback))) + +(defun js2-print-block (n i) + (let ((pad (js2-make-pad i))) + (insert pad "{\n") + (dolist (kid (js2-block-node-kids n)) + (js2-print-ast kid (1+ i))) + (insert pad "}"))) + +(defstruct (js2-scope + (:include js2-block-node) + (:constructor nil) + (:constructor make-js2-scope (&key (type js2-BLOCK) + (pos js2-token-beg) + len + kids))) + ;; The symbol-table is a LinkedHashMap<String,Symbol> in Rhino. + ;; I don't have one of those handy, so I'll use an alist for now. + ;; It's as fast as an emacs hashtable for up to about 50 elements, + ;; and is much lighter-weight to construct (both CPU and mem). + ;; The keys are interned strings (symbols) for faster lookup. + ;; Should switch to hybrid alist/hashtable eventually. + symbol-table ; an alist of (symbol . js2-symbol) + parent-scope ; a `js2-scope' + top) ; top-level `js2-scope' (script/function) + +(put 'cl-struct-js2-scope 'js2-visitor 'js2-visit-none) +(put 'cl-struct-js2-scope 'js2-printer 'js2-print-none) + +(defun js2-scope-set-parent-scope (scope parent) + (setf (js2-scope-parent-scope scope) parent + (js2-scope-top scope) (if (null parent) + scope + (js2-scope-top parent)))) + +(defun js2-node-get-enclosing-scope (node) + "Return the innermost `js2-scope' node surrounding NODE. +Returns nil if there is no enclosing scope node." + (let ((parent (js2-node-parent node))) + (while (not (js2-scope-p parent)) + (setq parent (js2-node-parent parent))) + parent)) + +(defun js2-get-defining-scope (scope name) + "Search up scope chain from SCOPE looking for NAME, a string or symbol. +Returns `js2-scope' in which NAME is defined, or nil if not found." + (let ((sym (if (symbolp name) + name + (intern name))) + table + result + (continue t)) + (while (and scope continue) + (if (and (setq table (js2-scope-symbol-table scope)) + (assq sym table)) + (setq continue nil + result scope) + (setq scope (js2-scope-parent-scope scope)))) + result)) + +(defsubst js2-scope-get-symbol (scope name) + "Return symbol table entry for NAME in SCOPE. +NAME can be a string or symbol. Returns a `js2-symbol' or nil if not found." + (and (js2-scope-symbol-table scope) + (cdr (assq (if (symbolp name) + name + (intern name)) + (js2-scope-symbol-table scope))))) + +(defsubst js2-scope-put-symbol (scope name symbol) + "Enter SYMBOL into symbol-table for SCOPE under NAME. +NAME can be a lisp symbol or string. SYMBOL is a `js2-symbol'." + (let* ((table (js2-scope-symbol-table scope)) + (sym (if (symbolp name) name (intern name))) + (entry (assq sym table))) + (if entry + (setcdr entry symbol) + (push (cons sym symbol) + (js2-scope-symbol-table scope))))) + +(defstruct (js2-symbol + (:constructor nil) + (:constructor make-js2-symbol (decl-type name &optional ast-node))) + "A symbol table entry." + ;; One of js2-FUNCTION, js2-LP (for parameters), js2-VAR, + ;; js2-LET, or js2-CONST + decl-type + name ; string + ast-node) ; a `js2-node' + +(defstruct (js2-error-node + (:include js2-node) + (:constructor nil) ; silence emacs21 byte-compiler + (:constructor make-js2-error-node (&key (type js2-ERROR) + (pos js2-token-beg) + len))) + "AST node representing a parse error.") + +(put 'cl-struct-js2-error-node 'js2-visitor 'js2-visit-none) +(put 'cl-struct-js2-error-node 'js2-printer 'js2-print-none) + +(defstruct (js2-script-node + (:include js2-scope) + (:constructor nil) + (:constructor make-js2-script-node (&key (type js2-SCRIPT) + (pos js2-token-beg) + len + var-decls + fun-decls))) + functions ; lisp list of nested functions + regexps ; lisp list of (string . flags) + symbols ; alist (every symbol gets unique index) + (param-count 0) + var-names ; vector of string names + consts ; bool-vector matching var-decls + (temp-number 0)) ; for generating temp variables + +(put 'cl-struct-js2-script-node 'js2-visitor 'js2-visit-block) +(put 'cl-struct-js2-script-node 'js2-printer 'js2-print-script) + +(defun js2-print-script (node indent) + (dolist (kid (js2-block-node-kids node)) + (js2-print-ast kid indent))) + +(defstruct (js2-ast-root + (:include js2-script-node) + (:constructor nil) + (:constructor make-js2-ast-root (&key (type js2-SCRIPT) + (pos js2-token-beg) + len + buffer))) + "The root node of a js2 AST." + buffer ; the source buffer from which the code was parsed + comments ; a lisp list of comments, ordered by start position + errors ; a lisp list of errors found during parsing + warnings ; a lisp list of warnings found during parsing + node-count) ; number of nodes in the tree, including the root + +(put 'cl-struct-js2-ast-root 'js2-visitor 'js2-visit-ast-root) +(put 'cl-struct-js2-ast-root 'js2-printer 'js2-print-script) + +(defun js2-visit-ast-root (ast callback) + (dolist (kid (js2-ast-root-kids ast)) + (js2-visit-ast kid callback)) + (dolist (comment (js2-ast-root-comments ast)) + (js2-visit-ast comment callback))) + +(defstruct (js2-comment-node + (:include js2-node) + (:constructor nil) + (:constructor make-js2-comment-node (&key (type js2-COMMENT) + (pos js2-token-beg) + len + (format js2-ts-comment-type)))) + format) ; 'line, 'block, 'jsdoc or 'html + +(put 'cl-struct-js2-comment-node 'js2-visitor 'js2-visit-none) +(put 'cl-struct-js2-comment-node 'js2-printer 'js2-print-comment) + +(defun js2-print-comment (n i) + ;; We really ought to link end-of-line comments to their nodes. + ;; Or maybe we could add a new comment type, 'endline. + (insert (js2-make-pad i) + (js2-node-string n))) + +(defstruct (js2-expr-stmt-node + (:include js2-node) + (:constructor nil) + (:constructor make-js2-expr-stmt-node (&key (type js2-EXPR_VOID) + (pos js2-ts-cursor) + len + expr))) + "An expression statement." + expr) + +(defsubst js2-expr-stmt-node-set-has-result (node) + "Change the node type to `js2-EXPR_RESULT'. Used for code generation." + (setf (js2-node-type node) js2-EXPR_RESULT)) + +(put 'cl-struct-js2-expr-stmt-node 'js2-visitor 'js2-visit-expr-stmt-node) +(put 'cl-struct-js2-expr-stmt-node 'js2-printer 'js2-print-expr-stmt-node) + +(defun js2-visit-expr-stmt-node (n v) + (js2-visit-ast (js2-expr-stmt-node-expr n) v)) + +(defun js2-print-expr-stmt-node (n indent) + (js2-print-ast (js2-expr-stmt-node-expr n) indent) + (insert ";\n")) + +(defstruct (js2-loop-node + (:include js2-scope) + (:constructor nil)) + "Abstract supertype of loop nodes." + body ; a `js2-block-node' + lp ; position of left-paren, nil if omitted + rp) ; position of right-paren, nil if omitted + +(defstruct (js2-do-node + (:include js2-loop-node) + (:constructor nil) + (:constructor make-js2-do-node (&key (type js2-DO) + (pos js2-token-beg) + len + body + condition + while-pos + lp + rp))) + "AST node for do-loop." + condition ; while (expression) + while-pos) ; buffer position of 'while' keyword + +(put 'cl-struct-js2-do-node 'js2-visitor 'js2-visit-do-node) +(put 'cl-struct-js2-do-node 'js2-printer 'js2-print-do-node) + +(defun js2-visit-do-node (n v) + (js2-visit-ast (js2-do-node-body n) v) + (js2-visit-ast (js2-do-node-condition n) v)) + +(defun js2-print-do-node (n i) + (let ((pad (js2-make-pad i))) + (insert pad "do {\n") + (dolist (kid (js2-block-node-kids (js2-do-node-body n))) + (js2-print-ast kid (1+ i))) + (insert pad "} while (") + (js2-print-ast (js2-do-node-condition n) 0) + (insert ");\n"))) + +(defstruct (js2-while-node + (:include js2-loop-node) + (:constructor nil) + (:constructor make-js2-while-node (&key (type js2-WHILE) + (pos js2-token-beg) + len + body + condition + lp + rp))) + "AST node for while-loop." + condition) ; while-condition + +(put 'cl-struct-js2-while-node 'js2-visitor 'js2-visit-while-node) +(put 'cl-struct-js2-while-node 'js2-printer 'js2-print-while-node) + +(defun js2-visit-while-node (n v) + (js2-visit-ast (js2-while-node-condition n) v) + (js2-visit-ast (js2-while-node-body n) v)) + +(defun js2-print-while-node (n i) + (let ((pad (js2-make-pad i))) + (insert pad "while (") + (js2-print-ast (js2-while-node-condition n) 0) + (insert ") {\n") + (js2-print-body (js2-while-node-body n) (1+ i)) + (insert pad "}\n"))) + +(defstruct (js2-for-node + (:include js2-loop-node) + (:constructor nil) + (:constructor make-js2-for-node (&key (type js2-FOR) + (pos js2-ts-cursor) + len + body + init + condition + update + lp + rp))) + "AST node for a C-style for-loop." + init ; initialization expression + condition ; loop condition + update) ; update clause + +(put 'cl-struct-js2-for-node 'js2-visitor 'js2-visit-for-node) +(put 'cl-struct-js2-for-node 'js2-printer 'js2-print-for-node) + +(defun js2-visit-for-node (n v) + (js2-visit-ast (js2-for-node-init n) v) + (js2-visit-ast (js2-for-node-condition n) v) + (js2-visit-ast (js2-for-node-update n) v) + (js2-visit-ast (js2-for-node-body n) v)) + +(defun js2-print-for-node (n i) + (let ((pad (js2-make-pad i))) + (insert pad "for (") + (js2-print-ast (js2-for-node-init n) 0) + (insert "; ") + (js2-print-ast (js2-for-node-condition n) 0) + (insert "; ") + (js2-print-ast (js2-for-node-update n) 0) + (insert ") {\n") + (js2-print-body (js2-for-node-body n) (1+ i)) + (insert pad "}\n"))) + +(defstruct (js2-for-in-node + (:include js2-loop-node) + (:constructor nil) + (:constructor make-js2-for-in-node (&key (type js2-FOR) + (pos js2-ts-cursor) + len + body + iterator + object + in-pos + each-pos + foreach-p + lp + rp))) + "AST node for a for..in loop." + iterator ; [var] foo in ... + object ; object over which we're iterating + in-pos ; buffer position of 'in' keyword + each-pos ; buffer position of 'each' keyword, if foreach-p + foreach-p) ; t if it's a for-each loop + +(put 'cl-struct-js2-for-in-node 'js2-visitor 'js2-visit-for-in-node) +(put 'cl-struct-js2-for-in-node 'js2-printer 'js2-print-for-in-node) + +(defun js2-visit-for-in-node (n v) + (js2-visit-ast (js2-for-in-node-iterator n) v) + (js2-visit-ast (js2-for-in-node-object n) v) + (js2-visit-ast (js2-for-in-node-body n) v)) + +(defun js2-print-for-in-node (n i) + (let ((pad (js2-make-pad i)) + (foreach (js2-for-in-node-foreach-p n))) + (insert pad "for ") + (if foreach + (insert "each ")) + (insert "(") + (js2-print-ast (js2-for-in-node-iterator n) 0) + (insert " in ") + (js2-print-ast (js2-for-in-node-object n) 0) + (insert ") {\n") + (js2-print-body (js2-for-in-node-body n) (1+ i)) + (insert pad "}\n"))) + +(defstruct (js2-return-node + (:include js2-node) + (:constructor nil) + (:constructor make-js2-return-node (&key (type js2-RETURN) + (pos js2-ts-cursor) + len + retval))) + "AST node for a return statement." + retval) ; expression to return, or 'undefined + +(put 'cl-struct-js2-return-node 'js2-visitor 'js2-visit-return-node) +(put 'cl-struct-js2-return-node 'js2-printer 'js2-print-return-node) + +(defun js2-visit-return-node (n v) + (if (js2-return-node-retval n) + (js2-visit-ast (js2-return-node-retval n) v))) + +(defun js2-print-return-node (n i) + (insert (js2-make-pad i) "return") + (when (js2-return-node-retval n) + (insert " ") + (js2-print-ast (js2-return-node-retval n) 0)) + (insert ";\n")) + +(defstruct (js2-if-node + (:include js2-node) + (:constructor nil) + (:constructor make-js2-if-node (&key (type js2-IF) + (pos js2-ts-cursor) + len + condition + then-part + else-pos + else-part + lp + rp))) + "AST node for an if-statement." + condition ; expression + then-part ; statement or block + else-pos ; optional buffer position of 'else' keyword + else-part ; optional statement or block + lp ; position of left-paren, nil if omitted + rp) ; position of right-paren, nil if omitted + +(put 'cl-struct-js2-if-node 'js2-visitor 'js2-visit-if-node) +(put 'cl-struct-js2-if-node 'js2-printer 'js2-print-if-node) + +(defun js2-visit-if-node (n v) + (js2-visit-ast (js2-if-node-condition n) v) + (js2-visit-ast (js2-if-node-then-part n) v) + (if (js2-if-node-else-part n) + (js2-visit-ast (js2-if-node-else-part n) v))) + +(defun js2-print-if-node (n i) + (let ((pad (js2-make-pad i)) + (then-part (js2-if-node-then-part n)) + (else-part (js2-if-node-else-part n))) + (insert pad "if (") + (js2-print-ast (js2-if-node-condition n) 0) + (insert ") {\n") + (js2-print-body then-part (1+ i)) + (insert pad "}") + (cond + ((not else-part) + (insert "\n")) + ((js2-if-node-p else-part) + (insert " else ") + (js2-print-body else-part i)) + (t + (insert " else {\n") + (js2-print-body else-part (1+ i)) + (insert pad "}\n"))))) + +(defstruct (js2-try-node + (:include js2-node) + (:constructor nil) + (:constructor make-js2-try-node (&key (type js2-TRY) + (pos js2-ts-cursor) + len + try-block + catch-clauses + finally-block))) + "AST node for a try-statement." + try-block + catch-clauses ; a lisp list of `js2-catch-node' + finally-block) ; a `js2-finally-node' + +(put 'cl-struct-js2-try-node 'js2-visitor 'js2-visit-try-node) +(put 'cl-struct-js2-try-node 'js2-printer 'js2-print-try-node) + +(defun js2-visit-try-node (n v) + (js2-visit-ast (js2-try-node-try-block n) v) + (dolist (clause (js2-try-node-catch-clauses n)) + (js2-visit-ast clause v)) + (if (js2-try-node-finally-block n) + (js2-visit-ast (js2-try-node-finally-block n) v))) + +(defun js2-print-try-node (n i) + (let ((pad (js2-make-pad i)) + (catches (js2-try-node-catch-clauses n)) + (finally (js2-try-node-finally-block n))) + (insert pad "try {\n") + (js2-print-body (js2-try-node-try-block n) (1+ i)) + (insert pad "}") + (when catches + (dolist (catch catches) + (js2-print-ast catch i))) + (if finally + (js2-print-ast finally i) + (insert "\n")))) + +(defstruct (js2-catch-node + (:include js2-node) + (:constructor nil) + (:constructor make-js2-catch-node (&key (type js2-CATCH) + (pos js2-ts-cursor) + len + var-name + guard-kwd + guard-expr + block + lp + rp))) + "AST node for a catch clause." + var-name ; a `js2-name-node' + guard-kwd ; relative buffer position of "if" in "catch (x if ...)" + guard-expr ; catch condition, a `js2-node' + block ; statements, a `js2-block-node' + lp ; buffer position of left-paren, nil if omitted + rp) ; buffer position of right-paren, nil if omitted + +(put 'cl-struct-js2-catch-node 'js2-visitor 'js2-visit-catch-node) +(put 'cl-struct-js2-catch-node 'js2-printer 'js2-print-catch-node) + +(defun js2-visit-catch-node (n v) + (js2-visit-ast (js2-catch-node-var-name n) v) + (when (js2-catch-node-guard-kwd n) + (js2-visit-ast (js2-catch-node-guard-expr n) v)) + (js2-visit-ast (js2-catch-node-block n) v)) + +(defun js2-print-catch-node (n i) + (let ((pad (js2-make-pad i)) + (guard-kwd (js2-catch-node-guard-kwd n)) + (guard-expr (js2-catch-node-guard-expr n))) + (insert " catch (") + (js2-print-ast (js2-catch-node-var-name n) 0) + (when guard-kwd + (insert " if ") + (js2-print-ast guard-expr 0)) + (insert ") {\n") + (js2-print-body (js2-catch-node-block n) (1+ i)) + (insert pad "}"))) + +(defstruct (js2-finally-node + (:include js2-node) + (:constructor nil) + (:constructor make-js2-finally-node (&key (type js2-FINALLY) + (pos js2-ts-cursor) + len + body))) + "AST node for a finally clause." + body) ; a `js2-node', often but not always a block node + +(put 'cl-struct-js2-finally-node 'js2-visitor 'js2-visit-finally-node) +(put 'cl-struct-js2-finally-node 'js2-printer 'js2-print-finally-node) + +(defun js2-visit-finally-node (n v) + (js2-visit-ast (js2-finally-node-body n) v)) + +(defun js2-print-finally-node (n i) + (let ((pad (js2-make-pad i))) + (insert " finally {\n") + (js2-print-body (js2-finally-node-body n) (1+ i)) + (insert pad "}\n"))) + +(defstruct (js2-switch-node + (:include js2-node) + (:constructor nil) + (:constructor make-js2-switch-node (&key (type js2-SWITCH) + (pos js2-ts-cursor) + len + discriminant + cases + lp + rp))) + "AST node for a switch statement." + discriminant ; a `js2-node' (switch expression) + cases ; a lisp list of `js2-case-node' + lp ; position of open-paren for discriminant, nil if omitted + rp) ; position of close-paren for discriminant, nil if omitted + +(put 'cl-struct-js2-switch-node 'js2-visitor 'js2-visit-switch-node) +(put 'cl-struct-js2-switch-node 'js2-printer 'js2-print-switch-node) + +(defun js2-visit-switch-node (n v) + (js2-visit-ast (js2-switch-node-discriminant n) v) + (dolist (c (js2-switch-node-cases n)) + (js2-visit-ast c v))) + +(defun js2-print-switch-node (n i) + (let ((pad (js2-make-pad i)) + (cases (js2-switch-node-cases n))) + (insert pad "switch (") + (js2-print-ast (js2-switch-node-discriminant n) 0) + (insert ") {\n") + (dolist (case cases) + (js2-print-ast case i)) + (insert pad "}\n"))) + +(defstruct (js2-case-node + (:include js2-block-node) + (:constructor nil) + (:constructor make-js2-case-node (&key (type js2-CASE) + (pos js2-ts-cursor) + len + kids + expr))) + "AST node for a case clause of a switch statement." + expr) ; the case expression (nil for default) + +(put 'cl-struct-js2-case-node 'js2-visitor 'js2-visit-case-node) +(put 'cl-struct-js2-case-node 'js2-printer 'js2-print-case-node) + +(defun js2-visit-case-node (n v) + (if (js2-case-node-expr n) ; nil for default: case + (js2-visit-ast (js2-case-node-expr n) v)) + (js2-visit-block n v)) + +(defun js2-print-case-node (n i) + (let ((pad (js2-make-pad i)) + (expr (js2-case-node-expr n))) + (insert pad) + (if (null expr) + (insert "default:\n") + (insert "case ") + (js2-print-ast expr 0) + (insert ":\n")) + (dolist (kid (js2-case-node-kids n)) + (js2-print-ast kid (1+ i))))) + +(defstruct (js2-throw-node + (:include js2-node) + (:constructor nil) + (:constructor make-js2-throw-node (&key (type js2-THROW) + (pos js2-ts-cursor) + len + expr))) + "AST node for a throw statement." + expr) ; the expression to throw + +(put 'cl-struct-js2-throw-node 'js2-visitor 'js2-visit-throw-node) +(put 'cl-struct-js2-throw-node 'js2-printer 'js2-print-throw-node) + +(defun js2-visit-throw-node (n v) + (js2-visit-ast (js2-throw-node-expr n) v)) + +(defun js2-print-throw-node (n i) + (insert (js2-make-pad i) "throw ") + (js2-print-ast (js2-throw-node-expr n) 0) + (insert ";\n")) + +(defstruct (js2-with-node + (:include js2-node) + (:constructor nil) + (:constructor make-js2-with-node (&key (type js2-WITH) + (pos js2-ts-cursor) + len + object + body + lp + rp))) + "AST node for a with-statement." + object + body + lp ; buffer position of left-paren around object, nil if omitted + rp) ; buffer position of right-paren around object, nil if omitted + +(put 'cl-struct-js2-with-node 'js2-visitor 'js2-visit-with-node) +(put 'cl-struct-js2-with-node 'js2-printer 'js2-print-with-node) + +(defun js2-visit-with-node (n v) + (js2-visit-ast (js2-with-node-object n) v) + (js2-visit-ast (js2-with-node-body n) v)) + +(defun js2-print-with-node (n i) + (let ((pad (js2-make-pad i))) + (insert pad "with (") + (js2-print-ast (js2-with-node-object n) 0) + (insert ") {\n") + (js2-print-body (js2-with-node-body n) (1+ i)) + (insert pad "}\n"))) + +(defstruct (js2-label-node + (:include js2-node) + (:constructor nil) + (:constructor make-js2-label-node (&key (type js2-LABEL) + (pos js2-ts-cursor) + len + name))) + "AST node for a statement label or case label." + name ; a string + loop) ; for validating and code-generating continue-to-label + +(put 'cl-struct-js2-label-node 'js2-visitor 'js2-visit-none) +(put 'cl-struct-js2-label-node 'js2-printer 'js2-print-label) + +(defun js2-print-label (n i) + (insert (js2-make-pad i) + (js2-label-node-name n) + ":\n")) + +(defstruct (js2-labeled-stmt-node + (:include js2-node) + (:constructor nil) + ;; type needs to be in `js2-side-effecting-tokens' to avoid spurious + ;; no-side-effects warnings, hence js2-EXPR_RESULT. + (:constructor make-js2-labeled-stmt-node (&key (type js2-EXPR_RESULT) + (pos js2-ts-cursor) + len + labels + stmt))) + "AST node for a statement with one or more labels. +Multiple labels for a statement are collapsed into the labels field." + labels ; lisp list of `js2-label-node' + stmt) ; the statement these labels are for + +(put 'cl-struct-js2-labeled-stmt-node 'js2-visitor 'js2-visit-labeled-stmt) +(put 'cl-struct-js2-labeled-stmt-node 'js2-printer 'js2-print-labeled-stmt) + +(defun js2-get-label-by-name (lbl-stmt name) + "Return a `js2-label-node' by NAME from LBL-STMT's labels list. +Returns nil if no such label is in the list." + (let ((label-list (js2-labeled-stmt-node-labels lbl-stmt)) + result) + (while (and label-list (not result)) + (if (string= (js2-label-node-name (car label-list)) name) + (setq result (car label-list)) + (setq label-list (cdr label-list)))) + result)) + +(defun js2-visit-labeled-stmt (n v) + (dolist (label (js2-labeled-stmt-node-labels n)) + (js2-visit-ast label v)) + (js2-visit-ast (js2-labeled-stmt-node-stmt n) v)) + +(defun js2-print-labeled-stmt (n i) + (dolist (label (js2-labeled-stmt-node-labels n)) + (js2-print-ast label i)) + (js2-print-ast (js2-labeled-stmt-node-stmt n) (1+ i))) + +(defun js2-labeled-stmt-node-contains (node label) + "Return t if NODE contains LABEL in its label set. +NODE is a `js2-labels-node'. LABEL is an identifier." + (loop for nl in (js2-labeled-stmt-node-labels node) + if (string= label (js2-label-node-name nl)) + return t + finally return nil)) + +(defsubst js2-labeled-stmt-node-add-label (node label) + "Add a `js2-label-node' to the label set for this statement." + (setf (js2-labeled-stmt-node-labels node) + (nconc (js2-labeled-stmt-node-labels node) (list label)))) + +(defstruct (js2-jump-node + (:include js2-node) + (:constructor nil)) + "Abstract supertype of break and continue nodes." + label ; `js2-name-node' for location of label identifier, if present + target) ; target js2-labels-node or loop/switch statement + +(defun js2-visit-jump-node (n v) + ;; we don't visit the target, since it's a back-link + (if (js2-jump-node-label n) + (js2-visit-ast (js2-jump-node-label n) v))) + +(defstruct (js2-break-node + (:include js2-jump-node) + (:constructor nil) + (:constructor make-js2-break-node (&key (type js2-BREAK) + (pos js2-ts-cursor) + len + label + target))) + "AST node for a break statement. +The label field is a `js2-name-node', possibly nil, for the named label +if provided. E.g. in 'break foo', it represents 'foo'. The target field +is the target of the break - a label node or enclosing loop/switch statement.") + +(put 'cl-struct-js2-break-node 'js2-visitor 'js2-visit-jump-node) +(put 'cl-struct-js2-break-node 'js2-printer 'js2-print-break-node) + +(defun js2-print-break-node (n i) + (insert (js2-make-pad i) "break") + (when (js2-break-node-label n) + (insert " ") + (js2-print-ast (js2-break-node-label n) 0)) + (insert ";\n")) + +(defstruct (js2-continue-node + (:include js2-jump-node) + (:constructor nil) + (:constructor make-js2-continue-node (&key (type js2-CONTINUE) + (pos js2-ts-cursor) + len + label + target))) + "AST node for a continue statement. +The label field is the user-supplied enclosing label name, a `js2-name-node'. +It is nil if continue specifies no label. The target field is the jump target: +a `js2-label-node' or the innermost enclosing loop.") + +(put 'cl-struct-js2-continue-node 'js2-visitor 'js2-visit-jump-node) +(put 'cl-struct-js2-continue-node 'js2-printer 'js2-print-continue-node) + +(defun js2-print-continue-node (n i) + (insert (js2-make-pad i) "continue") + (when (js2-continue-node-label n) + (insert " ") + (js2-print-ast (js2-continue-node-label n) 0)) + (insert ";\n")) + +(defstruct (js2-function-node + (:include js2-script-node) + (:constructor nil) + (:constructor make-js2-function-node (&key (type js2-FUNCTION) + (pos js2-ts-cursor) + len + (ftype 'FUNCTION) + (form 'FUNCTION_STATEMENT) + (name "") + params + body + lp + rp))) + "AST node for a function declaration. +The `params' field is a lisp list of nodes. Each node is either a simple +`js2-name-node', or if it's a destructuring-assignment parameter, a +`js2-array-node' or `js2-object-node'." + ftype ; FUNCTION, GETTER or SETTER + form ; FUNCTION_{STATEMENT|EXPRESSION|EXPRESSION_STATEMENT} + name ; function name (a `js2-name-node', or nil if anonymous) + params ; a lisp list of destructuring forms or simple name nodes + body ; a `js2-block-node' + lp ; position of arg-list open-paren, or nil if omitted + rp ; position of arg-list close-paren, or nil if omitted + ignore-dynamic ; ignore value of the dynamic-scope flag (interpreter only) + needs-activation ; t if we need an activation object for this frame + is-generator ; t if this function contains a yield + member-expr) ; nonstandard Ecma extension from Rhino + +(put 'cl-struct-js2-function-node 'js2-visitor 'js2-visit-function-node) +(put 'cl-struct-js2-function-node 'js2-printer 'js2-print-function-node) + +(defun js2-visit-function-node (n v) + (if (js2-function-node-name n) + (js2-visit-ast (js2-function-node-name n) v)) + (dolist (p (js2-function-node-params n)) + (js2-visit-ast p v)) + (js2-visit-ast (js2-function-node-body n) v)) + +(defun js2-print-function-node (n i) + (let ((pad (js2-make-pad i)) + (getter (js2-node-get-prop n 'GETTER_SETTER)) + (name (js2-function-node-name n)) + (params (js2-function-node-params n)) + (body (js2-function-node-body n)) + (expr (eq (js2-function-node-form n) 'FUNCTION_EXPRESSION))) + (unless getter + (insert pad "function")) + (when name + (insert " ") + (js2-print-ast name 0)) + (insert "(") + (loop with len = (length params) + for param in params + for count from 1 + do + (js2-print-ast param 0) + (if (< count len) + (insert ", "))) + (insert ") {") + (unless expr + (insert "\n")) + ;; TODO: fix this to be smarter about indenting, etc. + (js2-print-body body (1+ i)) + (insert pad "}") + (unless expr + (insert "\n")))) + +(defsubst js2-function-name (node) + "Return function name for NODE, a `js2-function-node', or nil if anonymous." + (and (js2-function-node-name node) + (js2-name-node-name (js2-function-node-name node)))) + +;; Having this be an expression node makes it more flexible. +;; There are IDE contexts, such as indentation in a for-loop initializer, +;; that work better if you assume it's an expression. Whenever we have +;; a standalone var/const declaration, we just wrap with an expr stmt. +;; Eclipse apparently screwed this up and now has two versions, expr and stmt. +(defstruct (js2-var-decl-node + (:include js2-node) + (:constructor nil) + (:constructor make-js2-var-decl-node (&key (type js2-VAR) + (pos js2-token-beg) + len + kids + decl-type))) + "AST node for a variable declaration list (VAR, CONST or LET). +The node bounds differ depending on the declaration type. For VAR or +CONST declarations, the bounds include the var/const keyword. For LET +declarations, the node begins at the position of the first child." + kids ; a lisp list of `js2-var-init-node' structs. + decl-type) ; js2-VAR, js2-CONST or js2-LET + +(put 'cl-struct-js2-var-decl-node 'js2-visitor 'js2-visit-var-decl) +(put 'cl-struct-js2-var-decl-node 'js2-printer 'js2-print-var-decl) + +(defun js2-visit-var-decl (n v) + (dolist (kid (js2-var-decl-node-kids n)) + (js2-visit-ast kid v))) + +(defun js2-print-var-decl (n i) + (let ((pad (js2-make-pad i)) + (tt (js2-var-decl-node-decl-type n))) + (insert pad) + (insert (cond + ((= tt js2-VAR) "var ") + ((= tt js2-LET) "") ; handled by parent let-{expr/stmt} + ((= tt js2-CONST) "const ") + (t + (error "malformed var-decl node")))) + (loop with kids = (js2-var-decl-node-kids n) + with len = (length kids) + for kid in kids + for count from 1 + do + (js2-print-ast kid 0) + (if (< count len) + (insert ", "))))) + +(defstruct (js2-var-init-node + (:include js2-node) + (:constructor nil) + (:constructor make-js2-var-init-node (&key (type js2-VAR) + (pos js2-ts-cursor) + len + target + initializer))) + "AST node for a variable declaration. +The type field will be js2-CONST for a const decl." + target ; `js2-name-node', `js2-object-node', or `js2-array-node' + initializer) ; initializer expression, a `js2-node' + +(put 'cl-struct-js2-var-init-node 'js2-visitor 'js2-visit-var-init-node) +(put 'cl-struct-js2-var-init-node 'js2-printer 'js2-print-var-init-node) + +(defun js2-visit-var-init-node (n v) + (js2-visit-ast (js2-var-init-node-target n) v) + (if (js2-var-init-node-initializer n) + (js2-visit-ast (js2-var-init-node-initializer n) v))) + +(defun js2-print-var-init-node (n i) + (let ((pad (js2-make-pad i)) + (name (js2-var-init-node-target n)) + (init (js2-var-init-node-initializer n))) + (insert pad) + (js2-print-ast name 0) + (when init + (insert " = ") + (js2-print-ast init 0)))) + +(defstruct (js2-cond-node + (:include js2-node) + (:constructor nil) + (:constructor make-js2-cond-node (&key (type js2-HOOK) + (pos js2-ts-cursor) + len + test-expr + true-expr + false-expr + q-pos + c-pos))) + "AST node for the ternary operator" + test-expr + true-expr + false-expr + q-pos ; buffer position of ? + c-pos) ; buffer position of : + +(put 'cl-struct-js2-cond-node 'js2-visitor 'js2-visit-cond-node) +(put 'cl-struct-js2-cond-node 'js2-printer 'js2-print-cond-node) + +(defun js2-visit-cond-node (n v) + (js2-visit-ast (js2-cond-node-test-expr n) v) + (js2-visit-ast (js2-cond-node-true-expr n) v) + (js2-visit-ast (js2-cond-node-false-expr n) v)) + +(defun js2-print-cond-node (n i) + (let ((pad (js2-make-pad i))) + (insert pad) + (js2-print-ast (js2-cond-node-test-expr n) 0) + (insert " ? ") + (js2-print-ast (js2-cond-node-true-expr n) 0) + (insert " : ") + (js2-print-ast (js2-cond-node-false-expr n) 0))) + +(defstruct (js2-infix-node + (:include js2-node) + (:constructor nil) + (:constructor make-js2-infix-node (&key type + (pos js2-ts-cursor) + len + op-pos + left + right))) + "Represents infix expressions. +Includes assignment ops like `|=', and the comma operator. +The type field inherited from `js2-node' holds the operator." + op-pos ; buffer position where operator begins + left ; any `js2-node' + right) ; any `js2-node' + +(put 'cl-struct-js2-infix-node 'js2-visitor 'js2-visit-infix-node) +(put 'cl-struct-js2-infix-node 'js2-printer 'js2-print-infix-node) + +(defun js2-visit-infix-node (n v) + (when (js2-infix-node-left n) + (js2-visit-ast (js2-infix-node-left n) v)) + (when (js2-infix-node-right n) + (js2-visit-ast (js2-infix-node-right n) v))) + +(defconst js2-operator-tokens + (let ((table (make-hash-table :test 'eq)) + (tokens + (list (cons js2-IN "in") + (cons js2-TYPEOF "typeof") + (cons js2-INSTANCEOF "instanceof") + (cons js2-DELPROP "delete") + (cons js2-COMMA ",") + (cons js2-COLON ":") + (cons js2-OR "||") + (cons js2-AND "&&") + (cons js2-INC "++") + (cons js2-DEC "--") + (cons js2-BITOR "|") + (cons js2-BITXOR "^") + (cons js2-BITAND "&") + (cons js2-EQ "==") + (cons js2-NE "!=") + (cons js2-LT "<") + (cons js2-LE "<=") + (cons js2-GT ">") + (cons js2-GE ">=") + (cons js2-LSH "<<") + (cons js2-RSH ">>") + (cons js2-URSH ">>>") + (cons js2-ADD "+") ; infix plus + (cons js2-SUB "-") ; infix minus + (cons js2-MUL "*") + (cons js2-DIV "/") + (cons js2-MOD "%") + (cons js2-NOT "!") + (cons js2-BITNOT "~") + (cons js2-POS "+") ; unary plus + (cons js2-NEG "-") ; unary minus + (cons js2-SHEQ "===") ; shallow equality + (cons js2-SHNE "!==") ; shallow inequality + (cons js2-ASSIGN "=") + (cons js2-ASSIGN_BITOR "|=") + (cons js2-ASSIGN_BITXOR "^=") + (cons js2-ASSIGN_BITAND "&=") + (cons js2-ASSIGN_LSH "<<=") + (cons js2-ASSIGN_RSH ">>=") + (cons js2-ASSIGN_URSH ">>>=") + (cons js2-ASSIGN_ADD "+=") + (cons js2-ASSIGN_SUB "-=") + (cons js2-ASSIGN_MUL "*=") + (cons js2-ASSIGN_DIV "/=") + (cons js2-ASSIGN_MOD "%=")))) + (loop for (k . v) in tokens do + (puthash k v table)) + table)) + +(defun js2-print-infix-node (n i) + (let* ((tt (js2-node-type n)) + (op (gethash tt js2-operator-tokens))) + (unless op + (error "unrecognized infix operator %s" (js2-node-type n))) + (insert (js2-make-pad i)) + (js2-print-ast (js2-infix-node-left n) 0) + (unless (= tt js2-COMMA) + (insert " ")) + (insert op) + (insert " ") + (js2-print-ast (js2-infix-node-right n) 0))) + +(defstruct (js2-assign-node + (:include js2-infix-node) + (:constructor nil) + (:constructor make-js2-assign-node (&key type + (pos js2-ts-cursor) + len + op-pos + left + right))) + "Represents any assignment. +The type field holds the actual assignment operator.") + +(put 'cl-struct-js2-assign-node 'js2-visitor 'js2-visit-infix-node) +(put 'cl-struct-js2-assign-node 'js2-printer 'js2-print-infix-node) + +(defstruct (js2-unary-node + (:include js2-node) + (:constructor nil) + (:constructor make-js2-unary-node (&key type ; required + (pos js2-ts-cursor) + len + operand))) + "AST node type for unary operator nodes. +The type field can be NOT, BITNOT, POS, NEG, INC, DEC, +TYPEOF, or DELPROP. For INC or DEC, a 'postfix node +property is added if the operator follows the operand." + operand) ; a `js2-node' expression + +(put 'cl-struct-js2-unary-node 'js2-visitor 'js2-visit-unary-node) +(put 'cl-struct-js2-unary-node 'js2-printer 'js2-print-unary-node) + +(defun js2-visit-unary-node (n v) + (js2-visit-ast (js2-unary-node-operand n) v)) + +(defun js2-print-unary-node (n i) + (let* ((tt (js2-node-type n)) + (op (gethash tt js2-operator-tokens)) + (postfix (js2-node-get-prop n 'postfix))) + (unless op + (error "unrecognized unary operator %s" tt)) + (insert (js2-make-pad i)) + (unless postfix + (insert op)) + (if (or (= tt js2-TYPEOF) + (= tt js2-DELPROP)) + (insert " ")) + (js2-print-ast (js2-unary-node-operand n) 0) + (when postfix + (insert op)))) + +(defstruct (js2-let-node + (:include js2-scope) + (:constructor nil) + (:constructor make-js2-let-node (&key (type js2-LETEXPR) + (pos js2-token-beg) + len + vars + body + lp + rp))) + "AST node for a let expression or a let statement. +Note that a let declaration such as let x=6, y=7 is a `js2-var-decl-node'." + vars ; a `js2-var-decl-node' + body ; a `js2-node' representing the expression or body block + lp + rp) + +(put 'cl-struct-js2-let-node 'js2-visitor 'js2-visit-let-node) +(put 'cl-struct-js2-let-node 'js2-printer 'js2-print-let-node) + +(defun js2-visit-let-node (n v) + (when (js2-let-node-vars n) + (js2-visit-ast (js2-let-node-vars n) v)) + (when (js2-let-node-body n) + (js2-visit-ast (js2-let-node-body n) v))) + +(defun js2-print-let-node (n i) + (insert (js2-make-pad i) "let (") + (js2-print-ast (js2-let-node-vars n) 0) + (insert ") ") + (js2-print-ast (js2-let-node-body n) i)) + +(defstruct (js2-keyword-node + (:include js2-node) + (:constructor nil) + (:constructor make-js2-keyword-node (&key type + (pos js2-token-beg) + (len (- js2-ts-cursor pos))))) + "AST node representing a literal keyword such as `null'. +Used for `null', `this', `true', `false' and `debugger'. +The node type is set to js2-NULL, js2-THIS, etc.") + +(put 'cl-struct-js2-keyword-node 'js2-visitor 'js2-visit-none) +(put 'cl-struct-js2-keyword-node 'js2-printer 'js2-print-keyword-node) + +(defun js2-print-keyword-node (n i) + (insert (js2-make-pad i) + (let ((tt (js2-node-type n))) + (cond + ((= tt 'js2-THIS) "this") + ((= tt 'js2-NULL) "null") + ((= tt 'js2-TRUE) "true") + ((= tt 'js2-FALSE) "false") + ((= tt 'js2-DEBUGGER) "debugger") + (t (error "Invalid keyword literal type: %d" tt)))))) + +(defsubst js2-this-node-p (node) + "Return t if this node is a `js2-literal-node' of type js2-THIS." + (eq (js2-node-type node) js2-THIS)) + +(defstruct (js2-new-node + (:include js2-node) + (:constructor nil) + (:constructor make-js2-new-node (&key (type js2-NEW) + (pos js2-token-beg) + len + target + args + initializer + lp + rp))) + "AST node for new-expression such as new Foo()." + target ; an identifier or reference + args ; a lisp list of argument nodes + lp ; position of left-paren, nil if omitted + rp ; position of right-paren, nil if omitted + initializer) ; experimental Rhino syntax: optional `js2-object-node' + +(put 'cl-struct-js2-new-node 'js2-visitor 'js2-visit-new-node) +(put 'cl-struct-js2-new-node 'js2-printer 'js2-print-new-node) + +(defun js2-visit-new-node (n v) + (js2-visit-ast (js2-new-node-target n) v) + (dolist (arg (js2-new-node-args n)) + (js2-visit-ast arg v)) + (when (js2-new-node-initializer n) + (js2-visit-ast (js2-new-node-initializer n) v))) + +(defun js2-print-new-node (n i) + (insert (js2-make-pad i) "new ") + (js2-print-ast (js2-new-node-target n)) + (insert "(") + (js2-print-list (js2-new-node-args n)) + (insert ")") + (when (js2-new-node-initializer n) + (insert " ") + (js2-print-ast (js2-new-node-initializer n)))) + +(defstruct (js2-name-node + (:include js2-node) + (:constructor nil) + (:constructor make-js2-name-node (&key (type js2-NAME) + (pos js2-token-beg) + (len (- js2-ts-cursor + js2-token-beg)) + (name js2-ts-string)))) + "AST node for a JavaScript identifier" + name ; a string + scope) ; a `js2-scope' (optional, used for codegen) + +(put 'cl-struct-js2-name-node 'js2-visitor 'js2-visit-none) +(put 'cl-struct-js2-name-node 'js2-printer 'js2-print-name-node) + +(defun js2-print-name-node (n i) + (insert (js2-make-pad i) + (js2-name-node-name n))) + +(defsubst js2-name-node-length (node) + "Return identifier length of NODE, a `js2-name-node'. +Returns 0 if NODE is nil or its identifier field is nil." + (if node + (length (js2-name-node-name node)) + 0)) + +(defstruct (js2-number-node + (:include js2-node) + (:constructor nil) + (:constructor make-js2-number-node (&key (type js2-NUMBER) + (pos js2-token-beg) + (len (- js2-ts-cursor + js2-token-beg)) + (value js2-ts-string) + (num-value js2-ts-number)))) + "AST node for a number literal." + value ; the original string, e.g. "6.02e23" + num-value) ; the parsed number value + +(put 'cl-struct-js2-number-node 'js2-visitor 'js2-visit-none) +(put 'cl-struct-js2-number-node 'js2-printer 'js2-print-number-node) + +(defun js2-print-number-node (n i) + (insert (js2-make-pad i) + (number-to-string (js2-number-node-value n)))) + +(defstruct (js2-regexp-node + (:include js2-node) + (:constructor nil) + (:constructor make-js2-regexp-node (&key (type js2-REGEXP) + (pos js2-token-beg) + (len (- js2-ts-cursor + js2-token-beg)) + value + flags))) + "AST node for a regular expression literal." + value ; the regexp string, without // delimiters + flags) ; a string of flags, e.g. `mi'. + +(put 'cl-struct-js2-regexp-node 'js2-visitor 'js2-visit-none) +(put 'cl-struct-js2-regexp-node 'js2-printer 'js2-print-regexp) + +(defun js2-print-regexp (n i) + (insert (js2-make-pad i) + "/" + (js2-regexp-node-value n) + "/") + (if (js2-regexp-node-flags n) + (insert (js2-regexp-node-flags n)))) + +(defstruct (js2-string-node + (:include js2-node) + (:constructor nil) + (:constructor make-js2-string-node (&key (type js2-STRING) + (pos js2-token-beg) + (len (- js2-ts-cursor + js2-token-beg)) + (value js2-ts-string)))) + "String literal. +Escape characters are not evaluated; e.g. \n is 2 chars in value field. +You can tell the quote type by looking at the first character." + value) ; the characters of the string, including the quotes + +(put 'cl-struct-js2-string-node 'js2-visitor 'js2-visit-none) +(put 'cl-struct-js2-string-node 'js2-printer 'js2-print-string-node) + +(defun js2-print-string-node (n i) + (insert (js2-make-pad i) + (js2-node-string n))) + +(defstruct (js2-array-node + (:include js2-node) + (:constructor nil) + (:constructor make-js2-array-node (&key (type js2-ARRAYLIT) + (pos js2-ts-cursor) + len + elems))) + "AST node for an array literal." + elems) ; list of expressions. [foo,,bar] yields a nil middle element. + +(put 'cl-struct-js2-array-node 'js2-visitor 'js2-visit-array-node) +(put 'cl-struct-js2-array-node 'js2-printer 'js2-print-array-node) + +(defun js2-visit-array-node (n v) + (dolist (e (js2-array-node-elems n)) + (when e ; can be nil, e.g. [a, ,b] + (js2-visit-ast e v)))) + +(defun js2-print-array-node (n i) + (insert (js2-make-pad i) "[") + (js2-print-list (js2-array-node-elems n)) + (insert "]")) + +(defstruct (js2-object-node + (:include js2-node) + (:constructor nil) + (:constructor make-js2-object-node (&key (type js2-OBJECTLIT) + (pos js2-ts-cursor) + len + elems))) + "AST node for an object literal expression." + elems) ; a lisp list of `js2-object-prop-node' + +(put 'cl-struct-js2-object-node 'js2-visitor 'js2-visit-object-node) +(put 'cl-struct-js2-object-node 'js2-printer 'js2-print-object-node) + +(defun js2-visit-object-node (n v) + (dolist (e (js2-object-node-elems n)) + (js2-visit-ast e v))) + +(defun js2-print-object-node (n i) + (insert (js2-make-pad i) "{") + (js2-print-list (js2-object-node-elems n)) + (insert "}")) + +(defstruct (js2-object-prop-node + (:include js2-infix-node) + (:constructor nil) + (:constructor make-js2-object-prop-node (&key (type js2-COLON) + (pos js2-ts-cursor) + len + left + right + op-pos))) + "AST node for an object literal prop:value entry. +The `left' field is the property: a name node, string node or number node. +The `right' field is a `js2-node' representing the initializer value.") + +(put 'cl-struct-js2-object-prop-node 'js2-visitor 'js2-visit-infix-node) +(put 'cl-struct-js2-object-prop-node 'js2-printer 'js2-print-object-prop-node) + +(defun js2-print-object-prop-node (n i) + (insert (js2-make-pad i)) + (js2-print-ast (js2-object-prop-node-left n) 0) + (insert ":") + (js2-print-ast (js2-object-prop-node-right n) 0)) + +(defstruct (js2-getter-setter-node + (:include js2-infix-node) + (:constructor nil) + (:constructor make-js2-getter-setter-node (&key type ; GET or SET + (pos js2-ts-cursor) + len + left + right))) + "AST node for a getter/setter property in an object literal. +The `left' field is the `js2-name-node' naming the getter/setter prop. +The `right' field is always an anonymous `js2-function-node' with a node +property `GETTER_SETTER' set to js2-GET or js2-SET. ") + +(put 'cl-struct-js2-getter-setter-node 'js2-visitor 'js2-visit-infix-node) +(put 'cl-struct-js2-getter-setter-node 'js2-printer 'js2-print-getter-setter) + +(defun js2-print-getter-setter (n i) + (let ((pad (js2-make-pad i)) + (left (js2-getter-setter-node-left n)) + (right (js2-getter-setter-node-right n))) + (insert pad) + (insert (if (= (js2-node-type n) js2-GET) "get " "set ")) + (js2-print-ast left 0) + (js2-print-ast right 0))) + +(defstruct (js2-prop-get-node + (:include js2-infix-node) + (:constructor nil) + (:constructor make-js2-prop-get-node (&key (type js2-GETPROP) + (pos js2-ts-cursor) + len + left + right))) + "AST node for a dotted property reference, e.g. foo.bar or foo().bar") + +(put 'cl-struct-js2-prop-get-node 'js2-visitor 'js2-visit-prop-get-node) +(put 'cl-struct-js2-prop-get-node 'js2-printer 'js2-print-prop-get-node) + +(defun js2-visit-prop-get-node (n v) + (when (js2-prop-get-node-left n) + (js2-visit-ast (js2-prop-get-node-left n) v)) + (when (js2-prop-get-node-right n) + (js2-visit-ast (js2-prop-get-node-right n) v))) + +(defun js2-print-prop-get-node (n i) + (insert (js2-make-pad i)) + (js2-print-ast (js2-prop-get-node-left n) 0) + (insert ".") + (js2-print-ast (js2-prop-get-node-right n) 0)) + +(defstruct (js2-elem-get-node + (:include js2-node) + (:constructor nil) + (:constructor make-js2-elem-get-node (&key (type js2-GETELEM) + (pos js2-ts-cursor) + len + target + element + lb + rb))) + "AST node for an array index expression such as foo[bar]." + target ; a `js2-node' - the expression preceding the "." + element ; a `js2-node' - the expression in brackets + lb ; position of left-bracket, nil if omitted + rb) ; position of right-bracket, nil if omitted + +(put 'cl-struct-js2-elem-get-node 'js2-visitor 'js2-visit-elem-get-node) +(put 'cl-struct-js2-elem-get-node 'js2-printer 'js2-print-elem-get-node) + +(defun js2-visit-elem-get-node (n v) + (when (js2-elem-get-node-target n) + (js2-visit-ast (js2-elem-get-node-target n) v)) + (when (js2-elem-get-node-element n) + (js2-visit-ast (js2-elem-get-node-element n) v))) + +(defun js2-print-elem-get-node (n i) + (insert (js2-make-pad i)) + (js2-print-ast (js2-elem-get-node-target n) 0) + (insert "[") + (js2-print-ast (js2-elem-get-node-element n) 0) + (insert "]")) + +(defstruct (js2-call-node + (:include js2-node) + (:constructor nil) + (:constructor make-js2-call-node (&key (type js2-CALL) + (pos js2-ts-cursor) + len + target + args + lp + rp))) + "AST node for a JavaScript function call." + target ; a `js2-node' evaluating to the function to call + args ; a lisp list of `js2-node' arguments + lp ; position of open-paren, or nil if missing + rp) ; position of close-paren, or nil if missing + +(put 'cl-struct-js2-call-node 'js2-visitor 'js2-visit-call-node) +(put 'cl-struct-js2-call-node 'js2-printer 'js2-print-call-node) + +(defun js2-visit-call-node (n v) + (js2-visit-ast (js2-call-node-target n) v) + (dolist (arg (js2-call-node-args n)) + (js2-visit-ast arg v))) + +(defun js2-print-call-node (n i) + (insert (js2-make-pad i)) + (js2-print-ast (js2-call-node-target n) 0) + (insert "(") + (js2-print-list (js2-call-node-args n)) + (insert ")")) + +(defstruct (js2-yield-node + (:include js2-node) + (:constructor nil) + (:constructor make-js2-yield-node (&key (type js2-YIELD) + (pos js2-ts-cursor) + len + value))) + "AST node for yield statement or expression." + value) ; optional: value to be yielded + +(put 'cl-struct-js2-yield-node 'js2-visitor 'js2-visit-yield-node) +(put 'cl-struct-js2-yield-node 'js2-printer 'js2-print-yield-node) + +(defun js2-visit-yield-node (n v) + (js2-visit-ast (js2-yield-node-value n) v)) + +(defun js2-print-yield-node (n i) + (insert (js2-make-pad i)) + (insert "yield") + (when (js2-yield-node-value n) + (insert " ") + (js2-print-ast (js2-yield-node-value n) 0))) + +(defstruct (js2-paren-node + (:include js2-node) + (:constructor nil) + (:constructor make-js2-paren-node (&key (type js2-LP) + (pos js2-ts-cursor) + len + expr))) + "AST node for a parenthesized expression. +In particular, used when the parens are syntactically optional, +as opposed to required parens such as those enclosing an if-conditional." + expr) ; `js2-node' + +(put 'cl-struct-js2-paren-node 'js2-visitor 'js2-visit-paren-node) +(put 'cl-struct-js2-paren-node 'js2-printer 'js2-print-paren-node) + +(defun js2-visit-paren-node (n v) + (js2-visit-ast (js2-paren-node-expr n) v)) + +(defun js2-print-paren-node (n i) + (insert (js2-make-pad i)) + (insert "(") + (js2-print-ast (js2-paren-node-expr n) 0) + (insert ")")) + +(defstruct (js2-array-comp-node + (:include js2-scope) + (:constructor nil) + (:constructor make-js2-array-comp-node (&key (type js2-ARRAYCOMP) + (pos js2-ts-cursor) + len + result + loops + filter + if-pos + lp + rp))) + "AST node for an Array comprehension such as [[x,y] for (x in foo) for (y in bar)]." + result ; result expression (just after left-bracket) + loops ; a lisp list of `js2-array-comp-loop-node' + filter ; guard/filter expression + if-pos ; buffer pos of 'if' keyword, if present, else nil + lp ; buffer position of if-guard left-paren, or nil if not present + rp) ; buffer position of if-guard right-paren, or nil if not present + +(put 'cl-struct-js2-array-comp-node 'js2-visitor 'js2-visit-array-comp-node) +(put 'cl-struct-js2-array-comp-node 'js2-printer 'js2-print-array-comp-node) + +(defun js2-visit-array-comp-node (n v) + (js2-visit-ast (js2-array-comp-node-result n) v) + (dolist (l (js2-array-comp-node-loops n)) + (js2-visit-ast l v)) + (if (js2-array-comp-node-filter n) + (js2-visit-ast (js2-array-comp-node-filter n) v))) + +(defun js2-print-array-comp-node (n i) + (let ((pad (js2-make-pad i)) + (result (js2-array-comp-node-result n)) + (loops (js2-array-comp-node-loops n)) + (filter (js2-array-comp-node-filter n))) + (insert pad "[") + (js2-print-ast result 0) + (dolist (l loops) + (insert " ") + (js2-print-ast l 0)) + (when filter + (insert " if (") + (js2-print-ast filter 0)) + (insert ")]"))) + +(defstruct (js2-array-comp-loop-node + (:include js2-for-in-node) + (:constructor nil) + (:constructor make-js2-array-comp-loop-node (&key (type js2-FOR) + (pos js2-ts-cursor) + len + iterator + object + in-pos + foreach-p + each-pos + lp + rp))) + "AST subtree for each 'for (foo in bar)' loop in an array comprehension.") + +(put 'cl-struct-js2-array-comp-loop-node 'js2-visitor 'js2-visit-array-comp-loop) +(put 'cl-struct-js2-array-comp-loop-node 'js2-printer 'js2-print-array-comp-loop) + +(defun js2-visit-array-comp-loop (n v) + (js2-visit-ast (js2-array-comp-loop-node-iterator n) v) + (js2-visit-ast (js2-array-comp-loop-node-object n) v)) + +(defun js2-print-array-comp-loop (n i) + (insert "for (") + (js2-print-ast (js2-array-comp-loop-node-iterator n) 0) + (insert " in ") + (js2-print-ast (js2-array-comp-loop-node-object n) 0) + (insert ")")) + +(defstruct (js2-empty-expr-node + (:include js2-node) + (:constructor nil) + (:constructor make-js2-empty-expr-node (&key (type js2-EMPTY) + (pos js2-token-beg) + len))) + "AST node for an empty expression.") + +(put 'cl-struct-js2-empty-expr-node 'js2-visitor 'js2-visit-none) +(put 'cl-struct-js2-empty-expr-node 'js2-printer 'js2-print-none) + +(defstruct (js2-xml-node + (:include js2-block-node) + (:constructor nil) + (:constructor make-js2-xml-node (&key (type js2-XML) + (pos js2-token-beg) + len + kids))) + "AST node for initial parse of E4X literals. +The kids field is a list of XML fragments, each a `js2-string-node' or +a `js2-xml-js-expr-node'. Equivalent to Rhino's XmlLiteral node.") + +(put 'cl-struct-js2-xml-node 'js2-visitor 'js2-visit-block) +(put 'cl-struct-js2-xml-node 'js2-printer 'js2-print-xml-node) + +(defun js2-print-xml-node (n i) + (dolist (kid (js2-xml-node-kids n)) + (js2-print-ast kid i))) + +(defstruct (js2-xml-js-expr-node + (:include js2-xml-node) + (:constructor nil) + (:constructor make-js2-xml-js-expr-node (&key (type js2-XML) + (pos js2-ts-cursor) + len + expr))) + "AST node for an embedded JavaScript {expression} in an E4X literal. +The start and end fields correspond to the curly-braces." + expr) ; a `js2-expr-node' of some sort + +(put 'cl-struct-js2-xml-js-expr-node 'js2-visitor 'js2-visit-xml-js-expr) +(put 'cl-struct-js2-xml-js-expr-node 'js2-printer 'js2-print-xml-js-expr) + +(defun js2-visit-xml-js-expr (n v) + (js2-visit-ast (js2-xml-js-expr-node-expr n) v)) + +(defun js2-print-xml-js-expr (n i) + (insert (js2-make-pad i)) + (insert "{") + (js2-print-ast (js2-xml-js-expr-node-expr n) 0) + (insert "}")) + +(defstruct (js2-xml-dot-query-node + (:include js2-infix-node) + (:constructor nil) + (:constructor make-js2-xml-dot-query-node (&key (type js2-DOTQUERY) + (pos js2-ts-cursor) + op-pos + len + left + right + rp))) + "AST node for an E4X foo.(bar) filter expression. +Note that the left-paren is automatically the character immediately +following the dot (.) in the operator. No whitespace is permitted +between the dot and the lp by the scanner." + rp) + +(put 'cl-struct-js2-xml-dot-query-node 'js2-visitor 'js2-visit-infix-node) +(put 'cl-struct-js2-xml-dot-query-node 'js2-printer 'js2-print-xml-dot-query) + +(defun js2-print-xml-dot-query (n i) + (insert (js2-make-pad i)) + (js2-print-ast (js2-xml-dot-query-node-left n) 0) + (insert ".(") + (js2-print-ast (js2-xml-dot-query-node-right n) 0) + (insert ")")) + +(defstruct (js2-xml-ref-node + (:include js2-node) + (:constructor nil)) ; abstract + "Base type for E4X XML attribute-access or property-get expressions. +Such expressions can take a variety of forms. The general syntax has +three parts: + + - (optional) an @ (specifying an attribute access) + - (optional) a namespace (a `js2-name-node') and double-colon + - (required) either a `js2-name-node' or a bracketed [expression] + +The property-name expressions (examples: ns::name, @name) are +represented as `js2-xml-prop-ref' nodes. The bracketed-expression +versions (examples: ns::[name], @[name]) become `js2-xml-elem-ref' nodes. + +This node type (or more specifically, its subclasses) will sometimes +be the right-hand child of a `js2-prop-get-node' or a +`js2-infix-node' of type `js2-DOTDOT', the .. xml-descendants operator. +The `js2-xml-ref-node' may also be a standalone primary expression with +no explicit target, which is valid in certain expression contexts such as + + company..employee.(@id < 100) + +in this case, the @id is a `js2-xml-ref' that is part of an infix '<' +expression whose parent is a `js2-xml-dot-query-node'." + namespace + at-pos + colon-pos) + +(defsubst js2-xml-ref-node-attr-access-p (node) + "Return non-nil if this expression began with an @-token." + (and (numberp (js2-xml-ref-node-at-pos node)) + (plusp (js2-xml-ref-node-at-pos node)))) + +(defstruct (js2-xml-prop-ref-node + (:include js2-xml-ref-node) + (:constructor nil) + (:constructor make-js2-xml-prop-ref-node (&key (type js2-REF_NAME) + (pos js2-token-beg) + len + propname + namespace + at-pos + colon-pos))) + "AST node for an E4X XML [expr] property-ref expression. +The JavaScript syntax is an optional @, an optional ns::, and a name. + + [ '@' ] [ name '::' ] name + +Examples include name, ns::name, ns::*, *::name, *::*, @attr, @ns::attr, +@ns::*, @*::attr, @*::*, and @*. + +The node starts at the @ token, if present. Otherwise it starts at the +namespace name. The node bounds extend through the closing right-bracket, +or if it is missing due to a syntax error, through the end of the index +expression." + propname) + +(put 'cl-struct-js2-xml-prop-ref-node 'js2-visitor 'js2-visit-xml-prop-ref-node) +(put 'cl-struct-js2-xml-prop-ref-node 'js2-printer 'js2-print-xml-prop-ref-node) + +(defun js2-visit-xml-prop-ref-node (n v) + (if (js2-xml-prop-ref-node-namespace n) + (js2-visit-ast (js2-xml-prop-ref-node-namespace n) v)) + (if (js2-xml-prop-ref-node-propname n) + (js2-visit-ast (js2-xml-prop-ref-node-propname n) v))) + +(defun js2-print-xml-prop-ref-node (n i) + (insert (js2-make-pad i)) + (if (js2-xml-ref-node-attr-access-p n) + (insert "@")) + (when (js2-xml-prop-ref-node-namespace n) + (js2-print-ast (js2-xml-prop-ref-node-namespace n) 0) + (insert "::")) + (if (js2-xml-prop-ref-node-propname n) + (js2-print-ast (js2-xml-prop-ref-node-propname n) 0))) + +(defstruct (js2-xml-elem-ref-node + (:include js2-xml-ref-node) + (:constructor nil) + (:constructor make-js2-xml-elem-ref-node (&key (type js2-REF_MEMBER) + (pos js2-token-beg) + len + expr + lb + rb + namespace + at-pos + colon-pos))) + "AST node for an E4X XML [expr] member-ref expression. +Syntax: + + [ '@' ] [ name '::' ] '[' expr ']' + +Examples include ns::[expr], @ns::[expr], @[expr], *::[expr] and @*::[expr]. + +Note that the form [expr] (i.e. no namespace or attribute-qualifier) +is not a legal E4X XML element-ref expression, since it's already used +for standard JavaScript element-get array indexing. Hence, a +`js2-xml-elem-ref-node' always has either the attribute-qualifier, a +non-nil namespace node, or both. + +The node starts at the @ token, if present. Otherwise it starts +at the namespace name. The node bounds extend through the closing +right-bracket, or if it is missing due to a syntax error, through the +end of the index expression." + expr ; the bracketed index expression + lb + rb) + +(put 'cl-struct-js2-xml-elem-ref-node 'js2-visitor 'js2-visit-xml-elem-ref-node) +(put 'cl-struct-js2-xml-elem-ref-node 'js2-printer 'js2-print-xml-elem-ref-node) + +(defun js2-visit-xml-elem-ref-node (n v) + (if (js2-xml-elem-ref-node-namespace n) + (js2-visit-ast (js2-xml-elem-ref-node-namespace n) v)) + (if (js2-xml-elem-ref-node-expr n) + (js2-visit-ast (js2-xml-elem-ref-node-expr n) v))) + +(defun js2-print-xml-elem-ref-node (n i) + (insert (js2-make-pad i)) + (if (js2-xml-ref-node-attr-access-p n) + (insert "@")) + (when (js2-xml-elem-ref-node-namespace n) + (js2-print-ast (js2-xml-elem-ref-node-namespace n) 0) + (insert "::")) + (insert "[") + (if (js2-xml-elem-ref-node-expr n) + (js2-print-ast (js2-xml-elem-ref-node-expr n) 0)) + (insert "]")) + +;;; Placeholder nodes for when we try parsing the XML literals structurally. + +(defstruct (js2-xml-start-tag-node + (:include js2-xml-node) + (:constructor nil) + (:constructor make-js2-xml-start-tag-node (&key (type js2-XML) + (pos js2-ts-cursor) + len + name + attrs + kids + empty-p))) + "AST node for an XML start-tag. Not currently used. +The `kids' field is a lisp list of child content nodes." + name ; a `js2-xml-name-node' + attrs ; a lisp list of `js2-xml-attr-node' + empty-p) ; t if this is an empty element such as <foo bar="baz"/> + +(put 'cl-struct-js2-xml-start-tag-node 'js2-visitor 'js2-visit-xml-start-tag) +(put 'cl-struct-js2-xml-start-tag-node 'js2-printer 'js2-print-xml-start-tag) + +(defun js2-visit-xml-start-tag (n v) + (js2-visit-ast (js2-xml-start-tag-node-name n) v) + (dolist (attr (js2-xml-start-tag-node-attrs n)) + (js2-visit-ast attr v)) + (js2-visit-block n v)) + +(defun js2-print-xml-start-tag (n i) + (insert (js2-make-pad i) "<") + (js2-print-ast (js2-xml-start-tag-node-name n) 0) + (when (js2-xml-start-tag-node-attrs n) + (insert " ") + (js2-print-list (js2-xml-start-tag-node-attrs n) " ")) + (insert ">")) + +;; I -think- I'm going to make the parent node the corresponding start-tag, +;; and add the end-tag to the kids list of the parent as well. +(defstruct (js2-xml-end-tag-node + (:include js2-xml-node) + (:constructor nil) + (:constructor make-js2-xml-end-tag-node (&key (type js2-XML) + (pos js2-ts-cursor) + len + name))) + "AST node for an XML end-tag. Not currently used." + name) ; a `js2-xml-name-node' + +(put 'cl-struct-js2-xml-end-tag-node 'js2-visitor 'js2-visit-xml-end-tag) +(put 'cl-struct-js2-xml-end-tag-node 'js2-printer 'js2-print-xml-end-tag) + +(defun js2-visit-xml-end-tag (n v) + (js2-visit-ast (js2-xml-end-tag-node-name n) v)) + +(defun js2-print-xml-end-tag (n i) + (insert (js2-make-pad i)) + (insert "</") + (js2-print-ast (js2-xml-end-tag-node-name n) 0) + (insert ">")) + +(defstruct (js2-xml-name-node + (:include js2-xml-node) + (:constructor nil) + (:constructor make-js2-xml-name-node (&key (type js2-XML) + (pos js2-ts-cursor) + len + namespace + kids))) + "AST node for an E4X XML name. Not currently used. +Any XML name can be qualified with a namespace, hence the namespace field. +Further, any E4X name can be comprised of arbitrary JavaScript {} expressions. +The kids field is a list of `js2-name-node' and `js2-xml-js-expr-node'. +For a simple name, the kids list has exactly one node, a `js2-name-node'." + namespace) ; a `js2-string-node' + +(put 'cl-struct-js2-xml-name-node 'js2-visitor 'js2-visit-xml-name-node) +(put 'cl-struct-js2-xml-name-node 'js2-printer 'js2-print-xml-name-node) + +(defun js2-visit-xml-name-node (n v) + (js2-visit-ast (js2-xml-name-node-namespace n) v)) + +(defun js2-print-xml-name-node (n i) + (insert (js2-make-pad i)) + (when (js2-xml-name-node-namespace n) + (js2-print-ast (js2-xml-name-node-namespace n) 0) + (insert "::")) + (dolist (kid (js2-xml-name-node-kids n)) + (js2-print-ast kid 0))) + +(defstruct (js2-xml-pi-node + (:include js2-xml-node) + (:constructor nil) + (:constructor make-js2-xml-pi-node (&key (type js2-XML) + (pos js2-ts-cursor) + len + name + attrs))) + "AST node for an E4X XML processing instruction. Not currently used." + name ; a `js2-xml-name-node' + attrs) ; a list of `js2-xml-attr-node' + +(put 'cl-struct-js2-xml-pi-node 'js2-visitor 'js2-visit-xml-pi-node) +(put 'cl-struct-js2-xml-pi-node 'js2-printer 'js2-print-xml-pi-node) + +(defun js2-visit-xml-pi-node (n v) + (js2-visit-ast (js2-xml-pi-node-name n) v) + (dolist (attr (js2-xml-pi-node-attrs n)) + (js2-visit-ast attr v))) + +(defun js2-print-xml-pi-node (n i) + (insert (js2-make-pad i) "<?") + (js2-print-ast (js2-xml-pi-node-name n)) + (when (js2-xml-pi-node-attrs n) + (insert " ") + (js2-print-list (js2-xml-pi-node-attrs n))) + (insert "?>")) + +(defstruct (js2-xml-cdata-node + (:include js2-xml-node) + (:constructor nil) + (:constructor make-js2-xml-cdata-node (&key (type js2-XML) + (pos js2-ts-cursor) + len + content))) + "AST node for a CDATA escape section. Not currently used." + content) ; a `js2-string-node' with node-property 'quote-type 'cdata + +(put 'cl-struct-js2-xml-cdata-node 'js2-visitor 'js2-visit-xml-cdata-node) +(put 'cl-struct-js2-xml-cdata-node 'js2-printer 'js2-print-xml-cdata-node) + +(defun js2-visit-xml-cdata-node (n v) + (js2-visit-ast (js2-xml-cdata-node-content n) v)) + +(defun js2-print-xml-cdata-node (n i) + (insert (js2-make-pad i)) + (js2-print-ast (js2-xml-cdata-node-content n))) + +(defstruct (js2-xml-attr-node + (:include js2-xml-node) + (:constructor nil) + (:constructor make-js2-attr-node (&key (type js2-XML) + (pos js2-ts-cursor) + len + name + value + eq-pos + quote-type))) + "AST node representing a foo='bar' XML attribute value. Not yet used." + name ; a `js2-xml-name-node' + value ; a `js2-xml-name-node' + eq-pos ; buffer position of "=" sign + quote-type) ; 'single or 'double + +(put 'cl-struct-js2-xml-attr-node 'js2-visitor 'js2-visit-xml-attr-node) +(put 'cl-struct-js2-xml-attr-node 'js2-printer 'js2-print-xml-attr-node) + +(defun js2-visit-xml-attr-node (n v) + (js2-visit-ast (js2-xml-attr-node-name n) v) + (js2-visit-ast (js2-xml-attr-node-value n) v)) + +(defun js2-print-xml-attr-node (n i) + (let ((quote (if (eq (js2-xml-attr-node-quote-type n) 'single) + "'" + "\""))) + (insert (js2-make-pad i)) + (js2-print-ast (js2-xml-attr-node-name n) 0) + (insert "=" quote) + (js2-print-ast (js2-xml-attr-node-value n) 0) + (insert quote))) + +(defstruct (js2-xml-text-node + (:include js2-xml-node) + (:constructor nil) + (:constructor make-js2-text-node (&key (type js2-XML) + (pos js2-ts-cursor) + len + content))) + "AST node for an E4X XML text node. Not currently used." + content) ; a lisp list of `js2-string-node' and `js2-xml-js-expr-node' + +(put 'cl-struct-js2-xml-text-node 'js2-visitor 'js2-visit-xml-text-node) +(put 'cl-struct-js2-xml-text-node 'js2-printer 'js2-print-xml-text-node) + +(defun js2-visit-xml-text-node (n v) + (js2-visit-ast (js2-xml-text-node-content n) v)) + +(defun js2-print-xml-text-node (n i) + (insert (js2-make-pad i)) + (dolist (kid (js2-xml-text-node-content n)) + (js2-print-ast kid))) + +(defstruct (js2-xml-comment-node + (:include js2-xml-node) + (:constructor nil) + (:constructor make-js2-xml-comment-node (&key (type js2-XML) + (pos js2-ts-cursor) + len))) + "AST node for E4X XML comment. Not currently used.") + +(put 'cl-struct-js2-xml-comment-node 'js2-visitor 'js2-visit-none) +(put 'cl-struct-js2-xml-comment-node 'js2-printer 'js2-print-xml-comment) + +(defun js2-print-xml-comment (n i) + (insert (js2-make-pad i) + (js2-node-string n))) + +;;; Node utilities + +(defsubst js2-node-line (n) + "Fetch the source line number at the start of node N. +This is O(n) in the length of the source buffer; use prudently." + (1+ (count-lines (point-min) (js2-node-abs-pos n)))) + +(defsubst js2-block-node-kid (n i) + "Return child I of node N, or nil if there aren't that many." + (nth i (js2-block-node-kids n))) + +(defsubst js2-block-node-first (n) + "Return first child of block node N, or nil if there is none." + (first (js2-block-node-kids n))) + +(defun js2-node-root (n) + "Return the root of the AST containing N. +If N has no parent pointer, returns N." + (let ((parent (js2-node-parent n))) + (if parent + (js2-node-root parent) + n))) + +(defun js2-node-position-in-parent (node &optional parent) + "Return the position of NODE in parent's block-kids list. +PARENT can be supplied if known. Positioned returned is zero-indexed. +Returns 0 if NODE is not a child of a block statement, or if NODE +is not a statement node." + (let ((p (or parent (js2-node-parent node))) + (i 0)) + (if (not (js2-block-node-p p)) + i + (or (js2-position node (js2-block-node-kids p)) + 0)))) + +(defsubst js2-node-short-name (n) + "Return the short name of node N as a string, e.g. `js2-if-node'." + (substring (symbol-name (aref n 0)) + (length "cl-struct-"))) + +(defsubst js2-node-child-list (node) + "Return the child list for NODE, a lisp list of nodes. +Works for block nodes, array nodes, obj literals, funarg lists, +var decls and try nodes (for catch clauses). Note that you should call +`js2-block-node-kids' on the function body for the body statements. +Returns nil for zero-length child lists or unsupported nodes." + (cond + ((js2-function-node-p node) + (js2-function-node-params node)) + ((js2-block-node-p node) + (js2-block-node-kids node)) + ((js2-try-node-p node) + (js2-try-node-catch-clauses node)) + ((js2-array-node-p node) + (js2-array-node-elems node)) + ((js2-object-node-p node) + (js2-object-node-elems node)) + ((js2-call-node-p node) + (js2-call-node-args node)) + ((js2-new-node-p node) + (js2-new-node-args node)) + ((js2-var-decl-node-p node) + (js2-var-decl-node-kids node)) + (t + nil))) + +(defsubst js2-node-set-child-list (node kids) + "Set the child list for NODE to KIDS." + (cond + ((js2-function-node-p node) + (setf (js2-function-node-params node) kids)) + ((js2-block-node-p node) + (setf (js2-block-node-kids node) kids)) + ((js2-try-node-p node) + (setf (js2-try-node-catch-clauses node) kids)) + ((js2-array-node-p node) + (setf (js2-array-node-elems node) kids)) + ((js2-object-node-p node) + (setf (js2-object-node-elems node) kids)) + ((js2-call-node-p node) + (setf (js2-call-node-args node) kids)) + ((js2-new-node-p node) + (setf (js2-new-node-args node) kids)) + ((js2-var-decl-node-p node) + (setf (js2-var-decl-node-kids node) kids)) + (t + (error "Unsupported node type: %s" (js2-node-short-name node)))) + kids) + +;; All because Common Lisp doesn't support multiple inheritance for defstructs. +(defconst js2-paren-expr-nodes + '(cl-struct-js2-array-comp-loop-node + cl-struct-js2-array-comp-node + cl-struct-js2-call-node + cl-struct-js2-catch-node + cl-struct-js2-do-node + cl-struct-js2-elem-get-node + cl-struct-js2-for-in-node + cl-struct-js2-for-node + cl-struct-js2-function-node + cl-struct-js2-if-node + cl-struct-js2-let-node + cl-struct-js2-new-node + cl-struct-js2-paren-node + cl-struct-js2-switch-node + cl-struct-js2-while-node + cl-struct-js2-with-node + cl-struct-js2-xml-dot-query-node) + "Node types that can have a parenthesized child expression. +In particular, nodes that respond to `js2-node-lp' and `js2-node-rp'.") + +(defsubst js2-paren-expr-node-p (node) + "Return t for nodes that typically have a parenthesized child expression. +Useful for computing the indentation anchors for arg-lists and conditions. +Note that it may return a false positive, for instance when NODE is +a `js2-new-node' and there are no arguments or parentheses." + (memq (aref node 0) js2-paren-expr-nodes)) + +;; Fake polymorphism... yech. +(defsubst js2-node-lp (node) + "Return relative left-paren position for NODE, if applicable. +For `js2-elem-get-node' structs, returns left-bracket position. +Note that the position may be nil in the case of a parse error." + (cond + ((js2-elem-get-node-p node) + (js2-elem-get-node-lb node)) + ((js2-loop-node-p node) + (js2-loop-node-lp node)) + ((js2-function-node-p node) + (js2-function-node-lp node)) + ((js2-if-node-p node) + (js2-if-node-lp node)) + ((js2-new-node-p node) + (js2-new-node-lp node)) + ((js2-call-node-p node) + (js2-call-node-lp node)) + ((js2-paren-node-p node) + (js2-node-pos node)) + ((js2-switch-node-p node) + (js2-switch-node-lp node)) + ((js2-catch-node-p node) + (js2-catch-node-lp node)) + ((js2-let-node-p node) + (js2-let-node-lp node)) + ((js2-array-comp-node-p node) + (js2-array-comp-node-lp node)) + ((js2-with-node-p node) + (js2-with-node-lp node)) + ((js2-xml-dot-query-node-p node) + (1+ (js2-infix-node-op-pos node))) + (t + (error "Unsupported node type: %s" (js2-node-short-name node))))) + +;; Fake polymorphism... blech. +(defsubst js2-node-rp (node) + "Return relative right-paren position for NODE, if applicable. +For `js2-elem-get-node' structs, returns right-bracket position. +Note that the position may be nil in the case of a parse error." + (cond + ((js2-elem-get-node-p node) + (js2-elem-get-node-lb node)) + ((js2-loop-node-p node) + (js2-loop-node-rp node)) + ((js2-function-node-p node) + (js2-function-node-rp node)) + ((js2-if-node-p node) + (js2-if-node-rp node)) + ((js2-new-node-p node) + (js2-new-node-rp node)) + ((js2-call-node-p node) + (js2-call-node-rp node)) + ((js2-paren-node-p node) + (+ (js2-node-pos node) (js2-node-len node))) + ((js2-switch-node-p node) + (js2-switch-node-rp node)) + ((js2-catch-node-p node) + (js2-catch-node-rp node)) + ((js2-let-node-p node) + (js2-let-node-rp node)) + ((js2-array-comp-node-p node) + (js2-array-comp-node-rp node)) + ((js2-with-node-p node) + (js2-with-node-rp node)) + ((js2-xml-dot-query-node-p node) + (1+ (js2-xml-dot-query-node-rp node))) + (t + (error "Unsupported node type: %s" (js2-node-short-name node))))) + +(defsubst js2-node-first-child (node) + "Returns the first element of `js2-node-child-list' for NODE." + (car (js2-node-child-list node))) + +(defsubst js2-node-last-child (node) + "Returns the last element of `js2-node-last-child' for NODE." + (car (last (js2-node-child-list node)))) + +(defun js2-node-prev-sibling (node) + "Return the previous statement in parent. +Works for parents supported by `js2-node-child-list'. +Returns nil if NODE is not in the parent, or PARENT is +not a supported node, or if NODE is the first child." + (let* ((p (js2-node-parent node)) + (kids (js2-node-child-list p)) + (sib (car kids))) + (while (and kids + (neq node (cadr kids))) + (setq kids (cdr kids) + sib (car kids))) + sib)) + +(defun js2-node-next-sibling (node) + "Return the next statement in parent block. +Returns nil if NODE is not in the block, or PARENT is not +a block node, or if NODE is the last statement." + (let* ((p (js2-node-parent node)) + (kids (js2-node-child-list p))) + (while (and kids + (neq node (car kids))) + (setq kids (cdr kids))) + (cadr kids))) + +(defun js2-node-find-child-before (pos parent &optional after) + "Find the last child that starts before POS in parent. +If AFTER is non-nil, returns first child starting after POS. +POS is an absolute buffer position. PARENT is any node +supported by `js2-node-child-list'. +Returns nil if no applicable child is found." + (let ((kids (if (js2-function-node-p parent) + (js2-block-node-kids (js2-function-node-body parent)) + (js2-node-child-list parent))) + (beg (if (js2-function-node-p parent) + (js2-node-abs-pos (js2-function-node-body parent)) + (js2-node-abs-pos parent))) + kid + result + fn + (continue t)) + (setq fn (if after '> '<)) + (while (and kids continue) + (setq kid (car kids)) + (if (funcall fn (+ beg (js2-node-pos kid)) pos) + (setq result kid + continue (if after nil t)) + (setq continue (if after t nil))) + (setq kids (cdr kids))) + result)) + +(defun js2-node-find-child-after (pos parent) + "Find first child that starts after POS in parent. +POS is an absolute buffer position. PARENT is any node +supported by `js2-node-child-list'. +Returns nil if no applicable child is found." + (js2-node-find-child-before pos parent 'after)) + +(defun js2-node-replace-child (pos parent new-node) + "Replace node at index POS in PARENT with NEW-NODE. +Only works for parents supported by `js2-node-child-list'." + (let ((kids (js2-node-child-list parent)) + (i 0)) + (while (< i pos) + (setq kids (cdr kids) + i (1+ i))) + (setcar kids new-node) + (js2-node-add-children parent new-node))) + +(defun js2-node-buffer (n) + "Return the buffer associated with AST N. +Returns nil if the buffer is not set as a property on the root +node, or if parent links were not recorded during parsing." + (let ((root (js2-node-root n))) + (and root + (js2-ast-root-p root) + (js2-ast-root-buffer root)))) + +(defsubst js2-block-node-push (n kid) + "Push js2-node KID onto the end of js2-block-node N's child list. +KID is always added to the -end- of the kids list. +Function also calls `js2-node-add-children' to add the parent link." + (let ((kids (js2-node-child-list n))) + (if kids + (setcdr kids (nconc (cdr kids) (list kid))) + (js2-node-set-child-list n (list kid))) + (js2-node-add-children n kid))) + +(defun js2-node-string (node) + (let ((buf (js2-node-buffer node)) + pos) + (unless buf + (error "No buffer available for node %s" node)) + (save-excursion + (set-buffer buf) + (buffer-substring-no-properties (setq pos (js2-node-abs-pos node)) + (+ pos (js2-node-len node)))))) + +;; Container for storing the node we're looking for in a traversal. +(defvar js2-discovered-node nil) +(make-variable-buffer-local 'js2-discovered-node) + +;; Keep track of absolute node position during traversals. +(defvar js2-visitor-offset nil) +(make-variable-buffer-local 'js2-visitor-offset) + +(defvar js2-node-search-point nil) +(make-variable-buffer-local 'js2-node-search-point) + +(when js2-mode-dev-mode-p + (defun js2-find-node-at-point () + (interactive) + (let ((node (js2-node-at-point))) + (message "%s" (or node "No node found at point")))) + (defun js2-node-name-at-point () + (interactive) + (let ((node (js2-node-at-point))) + (message "%s" (if node + (js2-node-short-name node) + "No node found at point."))))) + +(defun js2-node-at-point (&optional pos skip-comments) + "Return AST node at POS, a buffer position, defaulting to current point. +The `js2-mode-ast' variable must be set to the current parse tree. +Signals an error if the AST (`js2-mode-ast') is nil. +Always returns a node - if it can't find one, it returns the root. +If SKIP-COMMENTS is non-nil, comment nodes are ignored." + (let ((ast js2-mode-ast) + result) + (unless ast + (error "No JavaScript AST available")) + ;; Look through comments first, since they may be inside nodes that + ;; would otherwise report a match. + (setq pos (or pos (point)) + result (if (> pos (js2-node-abs-end ast)) + ast + (if (not skip-comments) + (js2-comment-at-point pos)))) + (unless result + (setq js2-discovered-node nil + js2-visitor-offset 0 + js2-node-search-point pos) + (unwind-protect + (catch 'js2-visit-done + (js2-visit-ast ast #'js2-node-at-point-visitor)) + (setq js2-visitor-offset nil + js2-node-search-point nil)) + (setq result js2-discovered-node)) + ;; may have found a comment beyond end of last child node, + ;; since visiting the ast-root looks at the comment-list last. + (if (and skip-comments + (js2-comment-node-p result)) + (setq result nil)) + (or result js2-mode-ast))) + +(defun js2-node-at-point-visitor (node end-p) + (let ((rel-pos (js2-node-pos node)) + abs-pos + abs-end + (point js2-node-search-point)) + (cond + (end-p + ;; this evaluates to a non-nil return value, even if it's zero + (decf js2-visitor-offset rel-pos)) + ;; we already looked for comments before visiting, and don't want them now + ((js2-comment-node-p node) + nil) + (t + (setq abs-pos (incf js2-visitor-offset rel-pos) + ;; we only want to use the node if the point is before + ;; the last character position in the node, so we decrement + ;; the absolute end by 1. + abs-end (+ abs-pos (js2-node-len node) -1)) + (cond + ;; If this node starts after search-point, stop the search. + ((> abs-pos point) + (throw 'js2-visit-done nil)) + ;; If this node ends before the search-point, don't check kids. + ((> point abs-end) + nil) + (t + ;; Otherwise point is within this node, possibly in a child. + (setq js2-discovered-node node) + t)))))) ; keep processing kids to look for more specific match + +(defsubst js2-block-comment-p (node) + "Return non-nil if NODE is a comment node of format `jsdoc' or `block'." + (and (js2-comment-node-p node) + (memq (js2-comment-node-format node) '(jsdoc block)))) + +;; TODO: put the comments in a vector and binary-search them instead +(defun js2-comment-at-point (&optional pos) + "Look through scanned comment nodes for one containing POS. +POS is a buffer position that defaults to current point. +Function returns nil if POS was not in any comment node." + (let ((ast js2-mode-ast) + (x (or pos (point))) + beg + end) + (unless ast + (error "No JavaScript AST available")) + (catch 'done + ;; Comments are stored in lexical order. + (dolist (comment (js2-ast-root-comments ast) nil) + (setq beg (js2-node-abs-pos comment) + end (+ beg (js2-node-len comment))) + (if (and (>= x beg) + (<= x end)) + (throw 'done comment)))))) + +(defun js2-mode-find-parent-fn (node) + "Find function enclosing NODE. +Returns nil if NODE is not inside a function." + (setq node (js2-node-parent node)) + (while (and node (not (js2-function-node-p node))) + (setq node (js2-node-parent node))) + (and (js2-function-node-p node) node)) + +(defun js2-mode-find-enclosing-fn (node) + "Find function or root enclosing NODE." + (if (js2-ast-root-p node) + node + (setq node (js2-node-parent node)) + (while (not (or (js2-ast-root-p node) + (js2-function-node-p node))) + (setq node (js2-node-parent node))) + node)) + +(defun js2-mode-find-enclosing-node (beg end) + "Find script or function fully enclosing BEG and END." + (let ((node (js2-node-at-point beg)) + pos + (continue t)) + (while continue + (if (or (js2-ast-root-p node) + (and (js2-function-node-p node) + (<= (setq pos (js2-node-abs-pos node)) beg) + (>= (+ pos (js2-node-len node)) end))) + (setq continue nil) + (setq node (js2-node-parent node)))) + node)) + +(defun js2-node-parent-script-or-fn (node) + "Find script or function immediately enclosing NODE. +If NODE is the ast-root, returns nil." + (if (js2-ast-root-p node) + nil + (setq node (js2-node-parent node)) + (while (and node (not (or (js2-function-node-p node) + (js2-script-node-p node)))) + (setq node (js2-node-parent node))) + node)) + +(defsubst js2-nested-function-p (node) + "Return t if NODE is a nested function, or is inside a nested function." + (js2-function-node-p (if (js2-function-node-p node) + (js2-node-parent-script-or-fn node) + (js2-node-parent-script-or-fn + (js2-node-parent-script-or-fn node))))) + +(defsubst js2-mode-shift-kids (kids start offset) + (dolist (kid kids) + (if (> (js2-node-pos kid) start) + (incf (js2-node-pos kid) offset)))) + +(defsubst js2-mode-shift-children (parent start offset) + "Update start-positions of all children of PARENT beyond START." + (let ((root (js2-node-root parent))) + (js2-mode-shift-kids (js2-node-child-list parent) start offset) + (js2-mode-shift-kids (js2-ast-root-comments root) start offset))) + +(defsubst js2-node-is-descendant (node ancestor) + "Return t if NODE is a descendant of ANCESTOR." + (while (and node + (neq node ancestor)) + (setq node (js2-node-parent node))) + node) + +;;; visitor infrastructure + +(defun js2-visit-none (node callback) + "Visitor for AST node that have no node children." + nil) + +(defun js2-print-none (node indent) + "Visitor for AST node with no printed representation.") + +(defun js2-print-body (node indent) + "Print a statement, or a block without braces." + (if (js2-block-node-p node) + (dolist (kid (js2-block-node-kids node)) + (js2-print-ast kid indent)) + (js2-print-ast node indent))) + +(defun js2-print-list (args &optional delimiter) + (loop with len = (length args) + for arg in args + for count from 1 + do + (js2-print-ast arg 0) + (if (< count len) + (insert (or delimiter ", "))))) + +(defun js2-print-tree (ast) + "Prints an AST to the current buffer. +Makes `js2-ast-parent-nodes' available to the printer functions." + (let ((max-lisp-eval-depth (max max-lisp-eval-depth 1500))) + (js2-print-ast ast))) + +(defun js2-print-ast (node &optional indent) + "Helper function for printing AST nodes. +Requires `js2-ast-parent-nodes' to be non-nil. +You should use `js2-print-tree' instead of this function." + (let ((printer (get (aref node 0) 'js2-printer)) + (i (or indent 0)) + (pos (js2-node-abs-pos node))) + ;; TODO: wedge comments in here somewhere + (if printer + (funcall printer node i)))) + +(defconst js2-side-effecting-tokens + (let ((tokens (make-bool-vector js2-num-tokens nil))) + (dolist (tt (list js2-ASSIGN + js2-ASSIGN_ADD + js2-ASSIGN_BITAND + js2-ASSIGN_BITOR + js2-ASSIGN_BITXOR + js2-ASSIGN_DIV + js2-ASSIGN_LSH + js2-ASSIGN_MOD + js2-ASSIGN_MUL + js2-ASSIGN_RSH + js2-ASSIGN_SUB + js2-ASSIGN_URSH + js2-BLOCK + js2-BREAK + js2-CALL + js2-CATCH + js2-CATCH_SCOPE + js2-CONST + js2-CONTINUE + js2-DEBUGGER + js2-DEC + js2-DELPROP + js2-DEL_REF + js2-DO + js2-ELSE + js2-EMPTY + js2-ENTERWITH + js2-EXPORT + js2-EXPR_RESULT + js2-FINALLY + js2-FOR + js2-FUNCTION + js2-GOTO + js2-IF + js2-IFEQ + js2-IFNE + js2-IMPORT + js2-INC + js2-JSR + js2-LABEL + js2-LEAVEWITH + js2-LET + js2-LETEXPR + js2-LOCAL_BLOCK + js2-LOOP + js2-NEW + js2-REF_CALL + js2-RETHROW + js2-RETURN + js2-RETURN_RESULT + js2-SEMI + js2-SETELEM + js2-SETELEM_OP + js2-SETNAME + js2-SETPROP + js2-SETPROP_OP + js2-SETVAR + js2-SET_REF + js2-SET_REF_OP + js2-SWITCH + js2-TARGET + js2-THROW + js2-TRY + js2-VAR + js2-WHILE + js2-WITH + js2-WITHEXPR + js2-YIELD)) + (aset tokens tt t)) + (if js2-instanceof-has-side-effects + (aset tokens js2-INSTANCEOF t)) + tokens)) + +(defun js2-node-has-side-effects (node) + "Return t if NODE has side effects." + (when node ; makes it easier to handle malformed expressions + (let ((tt (js2-node-type node))) + (cond + ;; This doubtless needs some work, since EXPR_VOID is used + ;; in several ways in Rhino, and I may not have caught them all. + ;; I'll wait for people to notice incorrect warnings. + ((and (= tt js2-EXPR_VOID) + (js2-expr-stmt-node-p node)) ; but not if EXPR_RESULT + (js2-node-has-side-effects (js2-expr-stmt-node-expr node))) + + ((= tt js2-COMMA) + (js2-node-has-side-effects (js2-infix-node-right node))) + + ((or (= tt js2-AND) + (= tt js2-OR)) + (or (js2-node-has-side-effects (js2-infix-node-right node)) + (js2-node-has-side-effects (js2-infix-node-left node)))) + + ((= tt js2-HOOK) + (and (js2-node-has-side-effects (js2-cond-node-true-expr node)) + (js2-node-has-side-effects (js2-cond-node-false-expr node)))) + + ((js2-paren-node-p node) + (js2-node-has-side-effects (js2-paren-node-expr node))) + + ((= tt js2-ERROR) ; avoid cascaded error messages + nil) + (t + (aref js2-side-effecting-tokens tt)))))) + +(defun js2-member-expr-leftmost-name (node) + "For an expr such as foo.bar.baz, return leftmost node foo. +NODE is any `js2-node' object. If it represents a member expression, +which is any sequence of property gets, element-gets, function calls, +or xml descendants/filter operators, then we look at the lexically +leftmost (first) node in the chain. If it is a name-node we return it. +Note that NODE can be a raw name-node and it will be returned as well. +If NODE is not a name-node or member expression, or if it is a member +expression whose leftmost target is not a name node, returns nil." + (let ((continue t) + result) + (while (and continue (not result)) + (cond + ((js2-name-node-p node) + (setq result node)) + ((js2-prop-get-node-p node) + (setq node (js2-prop-get-node-left node))) + ;; TODO: handle call-nodes, xml-nodes, others? + (t + (setq continue nil)))) + result)) + +(defconst js2-stmt-node-types + (list js2-BLOCK + js2-BREAK + js2-CONTINUE + js2-DEFAULT ; e4x "default xml namespace" statement + js2-DO + js2-EXPR_RESULT + js2-EXPR_VOID + js2-FOR + js2-IF + js2-RETURN + js2-SWITCH + js2-THROW + js2-TRY + js2-WHILE + js2-WITH) + "Node types that only appear in statement contexts. +The list does not include nodes that always appear as the child +of another specific statement type, such as switch-cases, +catch and finally blocks, and else-clauses. The list also excludes +nodes like yield, let and var, which may appear in either expression +or statement context, and in the latter context always have a +`js2-expr-stmt-node' parent. Finally, the list does not include +functions or scripts, which are treated separately from statements +by the JavaScript parser and runtime.") + +(defun js2-stmt-node-p (node) + "Heuristic for figuring out if NODE is a statement. +Some node types can appear in either an expression context or a +statement context, e.g. let-nodes, yield-nodes, and var-decl nodes. +For these node types in a statement context, the parent will be a +`js2-expr-stmt-node'. +Functions aren't included in the check." + (memq (js2-node-type node) js2-stmt-node-types)) + +(defsubst js2-mode-find-first-stmt (node) + "Search upward starting from NODE looking for a statement. +For purposes of this function, a `js2-function-node' counts." + (while (not (or (js2-stmt-node-p node) + (js2-function-node-p node))) + (setq node (js2-node-parent node))) + node) + +(defun js2-node-parent-stmt (node) + "Return the node's first ancestor that is a statement. +Returns nil if NODE is a `js2-ast-root'. Note that any expression +appearing in a statement context will have a parent that is a +`js2-expr-stmt-node' that will be returned by this function." + (let ((parent (js2-node-parent node))) + (if (or (null parent) + (js2-stmt-node-p parent) + (and (js2-function-node-p parent) + (neq (js2-function-node-form parent) 'FUNCTION_EXPRESSION))) + parent + (js2-node-parent-stmt parent)))) + +;; Roshan James writes: +;; Does consistent-return analysis on the function body when strict mode is +;; enabled. +;; +;; function (x) { return (x+1) } +;; +;; is ok, but +;; +;; function (x) { if (x < 0) return (x+1); } +;; +;; is not because the function can potentially return a value when the +;; condition is satisfied and if not, the function does not explicitly +;; return a value. +;; +;; This extends to checking mismatches such as "return" and "return <value>" +;; used in the same function. Warnings are not emitted if inconsistent +;; returns exist in code that can be statically shown to be unreachable. +;; Ex. +;; function (x) { while (true) { ... if (..) { return value } ... } } +;; +;; emits no warning. However if the loop had a break statement, then a +;; warning would be emitted. +;; +;; The consistency analysis looks at control structures such as loops, ifs, +;; switch, try-catch-finally blocks, examines the reachable code paths and +;; warns the user about an inconsistent set of termination possibilities. +;; +;; These flags enumerate the possible ways a statement/function can +;; terminate. These flags are used by endCheck() and by the Parser to +;; detect inconsistent return usage. +;; +;; END_UNREACHED is reserved for code paths that are assumed to always be +;; able to execute (example: throw, continue) +;; +;; END_DROPS_OFF indicates if the statement can transfer control to the +;; next one. Statement such as return dont. A compound statement may have +;; some branch that drops off control to the next statement. +;; +;; END_RETURNS indicates that the statement can return with no value. +;; END_RETURNS_VALUE indicates that the statement can return a value. +;; +;; A compound statement such as +;; if (condition) { +;; return value; +;; } +;; Will be detected as (END_DROPS_OFF | END_RETURN_VALUE) by endCheck() + +(defconst js2-END_UNREACHED 0) +(defconst js2-END_DROPS_OFF 1) +(defconst js2-END_RETURNS 2) +(defconst js2-END_RETURNS_VALUE 4) +(defconst js2-END_YIELDS 8) + +(defun js2-has-consistent-return-usage (node) + "Check that every return usage in a function body is consistent. +Returns t if the function satisfies strict mode requirement." + (let ((n (js2-end-check node))) + ;; either it doesn't return a value in any branch... + (or (js2-flag-not-set-p n js2-END_RETURNS_VALUE) + ;; or it returns a value (or is unreached) at every branch + (js2-flag-not-set-p n (logior js2-END_DROPS_OFF + js2-END_RETURNS + js2-END_YIELDS))))) + +(defun js2-end-check-if (node) + "Returns in the then and else blocks must be consistent with each other. +If there is no else block, then the return statement can fall through. +Returns logical OR of END_* flags" + (let ((th (js2-if-node-then-part node)) + (el (js2-if-node-else-part node))) + (if (null th) + js2-END_UNREACHED + (logior (js2-end-check th) (if el + (js2-end-check el) + js2-END_DROPS_OFF))))) + +(defun js2-end-check-switch (node) + "Consistency of return statements is checked between the case statements. +If there is no default, then the switch can fall through. If there is a +default, we check to see if all code paths in the default return or if +there is a code path that can fall through. +Returns logical OR of END_* flags." + (let ((rv js2-END_UNREACHED) + default-case) + ;; examine the cases + (catch 'break + (dolist (c (js2-switch-node-cases node)) + (if (js2-case-node-expr c) + (js2-set-flag rv (js2-end-check-block c)) + (setq default-case c) + (throw 'break nil)))) + + ;; we don't care how the cases drop into each other + (js2-clear-flag rv js2-END_DROPS_OFF) + + ;; examine the default + (js2-set-flag rv (if default-case + (js2-end-check default-case) + js2-END_DROPS_OFF)) + rv)) + +(defun js2-end-check-try (node) + "If the block has a finally, return consistency is checked in the +finally block. If all code paths in the finally return, then the +returns in the try-catch blocks don't matter. If there is a code path +that does not return or if there is no finally block, the returns +of the try and catch blocks are checked for mismatch. +Returns logical OR of END_* flags." + (let ((finally (js2-try-node-finally-block node)) + rv) + ;; check the finally if it exists + (setq rv (if finally + (js2-end-check (js2-finally-node-body finally)) + js2-END_DROPS_OFF)) + + ;; If the finally block always returns, then none of the returns + ;; in the try or catch blocks matter. + (when (js2-flag-set-p rv js2-END_DROPS_OFF) + (js2-clear-flag rv js2-END_DROPS_OFF) + + ;; examine the try block + (js2-set-flag rv (js2-end-check (js2-try-node-try-block node))) + + ;; check each catch block + (dolist (cb (js2-try-node-catch-clauses node)) + (js2-set-flag rv (js2-end-check (js2-catch-node-block cb))))) + rv)) + +(defun js2-end-check-loop (node) + "Return statement in the loop body must be consistent. The default +assumption for any kind of a loop is that it will eventually terminate. +The only exception is a loop with a constant true condition. Code that +follows such a loop is examined only if one can statically determine +that there is a break out of the loop. + + for(... ; ... ; ...) {} + for(... in ... ) {} + while(...) { } + do { } while(...) + +Returns logical OR of END_* flags." + (let ((rv (js2-end-check (js2-loop-node-body node))) + (condition (cond + ((js2-while-node-p node) + (js2-while-node-condition node)) + ((js2-do-node-p node) + (js2-do-node-condition node)) + ((js2-for-node-p node) + (js2-for-node-condition node))))) + + ;; check to see if the loop condition is always true + (if (and condition + (eq (js2-always-defined-boolean-p condition) 'ALWAYS_TRUE)) + (js2-clear-flag rv js2-END_DROPS_OFF)) + + ;; look for effect of breaks + (js2-set-flag rv (js2-node-get-prop node + 'CONTROL_BLOCK_PROP + js2-END_UNREACHED)) + rv)) + +(defun js2-end-check-block (node) + "A general block of code is examined statement by statement. +If any statement (even a compound one) returns in all branches, then +subsequent statements are not examined. +Returns logical OR of END_* flags." + (let* ((rv js2-END_DROPS_OFF) + (kids (js2-block-node-kids node)) + (n (car kids))) + ;; Check each statment. If the statement can continue onto the next + ;; one (i.e. END_DROPS_OFF is set), then check the next statement. + (while (and n (js2-flag-set-p rv js2-END_DROPS_OFF)) + (js2-clear-flag rv js2-END_DROPS_OFF) + (js2-set-flag rv (js2-end-check n)) + (setq kids (cdr kids) + n (car kids))) + rv)) + +(defun js2-end-check-label (node) + "A labeled statement implies that there may be a break to the label. +The function processes the labeled statement and then checks the +CONTROL_BLOCK_PROP property to see if there is ever a break to the +particular label. +Returns logical OR of END_* flags." + (let ((rv (js2-end-check (js2-labeled-stmt-node-stmt node)))) + (logior rv (js2-node-get-prop node + 'CONTROL_BLOCK_PROP + js2-END_UNREACHED)))) + +(defun js2-end-check-break (node) + "When a break is encountered annotate the statement being broken +out of by setting its CONTROL_BLOCK_PROP property. +Returns logical OR of END_* flags." + (and (js2-break-node-target node) + (js2-node-set-prop (js2-break-node-target node) + 'CONTROL_BLOCK_PROP + js2-END_DROPS_OFF)) + js2-END_UNREACHED) + +(defun js2-end-check (node) + "Examine the body of a function, doing a basic reachability analysis. +Returns a combination of flags END_* flags that indicate +how the function execution can terminate. These constitute only the +pessimistic set of termination conditions. It is possible that at +runtime certain code paths will never be actually taken. Hence this +analysis will flag errors in cases where there may not be errors. +Returns logical OR of END_* flags" + (let (kid) + (cond + ((js2-break-node-p node) + (js2-end-check-break node)) + + ((js2-expr-stmt-node-p node) + (if (setq kid (js2-expr-stmt-node-expr node)) + (js2-end-check kid) + js2-END_DROPS_OFF)) + + ((or (js2-continue-node-p node) + (js2-throw-node-p node)) + js2-END_UNREACHED) + + ((js2-return-node-p node) + (if (setq kid (js2-return-node-retval node)) + js2-END_RETURNS_VALUE + js2-END_RETURNS)) + + ((js2-loop-node-p node) + (js2-end-check-loop node)) + + ((js2-switch-node-p node) + (js2-end-check-switch node)) + + ((js2-labeled-stmt-node-p node) + (js2-end-check-label node)) + + ((js2-if-node-p node) + (js2-end-check-if node)) + + ((js2-try-node-p node) + (js2-end-check-try node)) + + ((js2-block-node-p node) + (if (null (js2-block-node-kids node)) + js2-END_DROPS_OFF + (js2-end-check-block node))) + + ((js2-yield-node-p node) + js2-END_YIELDS) + + (t + js2-END_DROPS_OFF)))) + +(defun js2-always-defined-boolean-p (node) + "Check if NODE always evaluates to true or false in boolean context. +Returns 'ALWAYS_TRUE, 'ALWAYS_FALSE, or nil if it's neither always true +nor always false." + (let ((tt (js2-node-type node)) + num) + (cond + ((or (= tt js2-FALSE) (= tt js2-NULL)) + 'ALWAYS_FALSE) + ((= tt js2-TRUE) + 'ALWAYS_TRUE) + ((= tt js2-NUMBER) + (setq num (js2-number-node-num-value node)) + (if (and (not (eq num 0.0e+NaN)) + (not (zerop num))) + 'ALWAYS_TRUE + 'ALWAYS_FALSE)) + (t + nil)))) + +(provide 'js2-ast) + +;;; js2-ast.el ends here +;;; js2-highlight.el --- JavaScript syntax coloring support + +;; Author: Steve Yegge (steve.yegge@gmail.com) +;; Keywords: javascript languages + +;;; Code: + + +(defsubst js2-set-face (beg end face &optional record) + "Fontify a region. If RECORD is non-nil, record for later." + (when (plusp js2-highlight-level) + (setq beg (min (point-max) beg) + beg (max (point-min) beg) + end (min (point-max) end) + end (max (point-min) end)) + (if record + (push (list beg end face) js2-mode-fontifications) + (put-text-property beg end 'face face)))) + +(defsubst js2-set-kid-face (pos kid len face) + "Set-face on a child node. +POS is absolute buffer position of parent. +KID is the child node. +LEN is the length to fontify. +FACE is the face to fontify with." + (js2-set-face (+ pos (js2-node-pos kid)) + (+ pos (js2-node-pos kid) (js2-node-len kid)) + face)) + +(defsubst js2-fontify-kwd (start length) + (js2-set-face start (+ start length) 'font-lock-keyword-face)) + +(defsubst js2-clear-face (beg end) + (remove-text-properties beg end '(face nil + help-echo nil + point-entered nil + c-in-sws nil))) + +(defsubst js2-record-text-property (beg end prop value) + "Record a text property to set when parsing finishes." + (push (list beg end prop value) js2-mode-deferred-properties)) + +(defconst js2-ecma-global-props + (concat "^" + (regexp-opt + '("Infinity" "NaN" "undefined" "arguments") t) + "$") + "Value properties of the Ecma-262 Global Object. +Shown at or above `js2-highlight-level' 2.") + +;; might want to add the name "arguments" to this list? +(defconst js2-ecma-object-props + (concat "^" + (regexp-opt + '("prototype" "__proto__" "__parent__") t) + "$") + "Value properties of the Ecma-262 Object constructor. +Shown at or above `js2-highlight-level' 2.") + +(defconst js2-ecma-global-funcs + (concat + "^" + (regexp-opt + '("decodeURI" "decodeURIComponent" "encodeURI" "encodeURIComponent" + "eval" "isFinite" "isNaN" "parseFloat" "parseInt") t) + "$") + "Function properties of the Ecma-262 Global object. +Shown at or above `js2-highlight-level' 2.") + +(defconst js2-ecma-number-props + (concat "^" + (regexp-opt '("MAX_VALUE" "MIN_VALUE" "NaN" + "NEGATIVE_INFINITY" + "POSITIVE_INFINITY") t) + "$") + "Properties of the Ecma-262 Number constructor. +Shown at or above `js2-highlight-level' 2.") + +(defconst js2-ecma-date-props "^\\(parse\\|UTC\\)$" + "Properties of the Ecma-262 Date constructor. +Shown at or above `js2-highlight-level' 2.") + + +(defconst js2-ecma-math-props + (concat "^" + (regexp-opt + '("E" "LN10" "LN2" "LOG2E" "LOG10E" "PI" "SQRT1_2" "SQRT2") + t) + "$") + "Properties of the Ecma-262 Math object. +Shown at or above `js2-highlight-level' 2.") + + +(defconst js2-ecma-math-funcs + (concat "^" + (regexp-opt + '("abs" "acos" "asin" "atan" "atan2" "ceil" "cos" "exp" "floor" + "log" "max" "min" "pow" "random" "round" "sin" "sqrt" "tan") t) + "$") + "Function properties of the Ecma-262 Math object. +Shown at or above `js2-highlight-level' 2.") + +(defconst js2-ecma-function-props + (concat + "^" + (regexp-opt + '(;; properties of the Object prototype object + "hasOwnProperty" "isPrototypeOf" "propertyIsEnumerable" + "toLocaleString" "toString" "valueOf" + ;; properties of the Function prototype object + "apply" "call" + ;; properties of the Array prototype object + "concat" "join" "pop" "push" "reverse" "shift" "slice" "sort" + "splice" "unshift" + ;; properties of the String prototype object + "charAt" "charCodeAt" "fromCharCode" "indexOf" "lastIndexOf" + "localeCompare" "match" "replace" "search" "split" "substring" + "toLocaleLowerCase" "toLocaleUpperCase" "toLowerCase" + "toUpperCase" + ;; properties of the Number prototype object + "toExponential" "toFixed" "toPrecision" + ;; properties of the Date prototype object + "getDate" "getDay" "getFullYear" "getHours" "getMilliseconds" + "getMinutes" "getMonth" "getSeconds" "getTime" + "getTimezoneOffset" "getUTCDate" "getUTCDay" "getUTCFullYear" + "getUTCHours" "getUTCMilliseconds" "getUTCMinutes" "getUTCMonth" + "getUTCSeconds" "setDate" "setFullYear" "setHours" + "setMilliseconds" "setMinutes" "setMonth" "setSeconds" "setTime" + "setUTCDate" "setUTCFullYear" "setUTCHours" "setUTCMilliseconds" + "setUTCMinutes" "setUTCMonth" "setUTCSeconds" "toDateString" + "toLocaleDateString" "toLocaleString" "toLocaleTimeString" + "toTimeString" "toUTCString" + ;; properties of the RegExp prototype object + "exec" "test" + ;; SpiderMonkey/Rhino extensions, versions 1.5+ + "toSource" "__defineGetter__" "__defineSetter__" + "__lookupGetter__" "__lookupSetter__" "__noSuchMethod__" + "every" "filter" "forEach" "lastIndexOf" "map" "some") + t) + "$") + "Built-in functions defined by Ecma-262 and SpiderMonkey extensions. +Shown at or above `js2-highlight-level' 3.") + +(defsubst js2-parse-highlight-prop-get (parent target prop call-p) + (let ((target-name (and target + (js2-name-node-p target) + (js2-name-node-name target))) + (prop-name (if prop (js2-name-node-name prop))) + (level1 (>= js2-highlight-level 1)) + (level2 (>= js2-highlight-level 2)) + (level3 (>= js2-highlight-level 3)) + pos + face) + (when level2 + (if call-p + (cond + ((and target prop) + (cond + ((and level3 (string-match js2-ecma-function-props prop-name)) + (setq face 'font-lock-builtin-face)) + ((and target-name prop) + (cond + ((string= target-name "Date") + (if (string-match js2-ecma-date-props prop-name) + (setq face 'font-lock-builtin-face))) + ((string= target-name "Math") + (if (string-match js2-ecma-math-funcs prop-name) + (setq face 'font-lock-builtin-face))))))) + (prop + (if (string-match js2-ecma-global-funcs prop-name) + (setq face 'font-lock-builtin-face)))) + (cond + ((and target prop) + (cond + ((string= target-name "Number") + (if (string-match js2-ecma-number-props prop-name) + (setq face 'font-lock-constant-face))) + ((string= target-name "Math") + (if (string-match js2-ecma-math-props prop-name) + (setq face 'font-lock-constant-face))))) + (prop + (if (string-match js2-ecma-object-props prop-name) + (setq face 'font-lock-constant-face))))) + (when face + (js2-set-face (setq pos (+ (js2-node-pos parent) ; absolute + (js2-node-pos prop))) ; relative + (+ pos (js2-node-len prop)) + face))))) + +(defun js2-parse-highlight-member-expr-node (node) + "Perform syntax highlighting of EcmaScript built-in properties. +The variable `js2-highlight-level' governs this highighting." + (let (face target prop name pos end parent call-p callee) + (cond + ;; case 1: simple name, e.g. foo + ((js2-name-node-p node) + (setq name (js2-name-node-name node)) + ;; possible for name to be nil in rare cases - saw it when + ;; running js2-mode on an elisp buffer. Might as well try to + ;; make it so js2-mode never barfs. + (when name + (setq face (if (string-match js2-ecma-global-props name) + 'font-lock-constant-face)) + (when face + (setq pos (js2-node-pos node) + end (+ pos (js2-node-len node))) + (js2-set-face pos end face)))) + + ;; case 2: property access or function call + ((or (js2-prop-get-node-p node) + ;; highlight function call if expr is a prop-get node + ;; or a plain name (i.e. unqualified function call) + (and (setq call-p (js2-call-node-p node)) + (setq callee (js2-call-node-target node)) ; separate setq! + (or (js2-prop-get-node-p callee) + (js2-name-node-p callee)))) + (setq parent node + node (if call-p callee node)) + (if (and call-p (js2-name-node-p callee)) + (setq prop callee) + (setq target (js2-prop-get-node-left node) + prop (js2-prop-get-node-right node))) + (cond + ((js2-name-node-p target) + (if (js2-name-node-p prop) + ;; case 2a: simple target, simple prop name, e.g. foo.bar + (js2-parse-highlight-prop-get parent target prop call-p) + ;; case 2b: simple target, complex name, e.g. foo.x[y] + (js2-parse-highlight-prop-get parent target nil call-p))) + ((js2-name-node-p prop) + ;; case 2c: complex target, simple name, e.g. x[y].bar + (js2-parse-highlight-prop-get parent target prop call-p))))))) + +(defun js2-parse-highlight-member-expr-fn-name (expr) + "Highlight the `baz' in function foo.bar.baz(args) {...}. +This is experimental Rhino syntax. EXPR is the foo.bar.baz member expr. +We currently only handle the case where the last component is a prop-get +of a simple name. Called before EXPR has a parent node." + (let (pos + (name (and (js2-prop-get-node-p expr) + (js2-prop-get-node-right expr)))) + (when (js2-name-node-p name) + (js2-set-face (setq pos (+ (js2-node-pos expr) ; parent is absolute + (js2-node-pos name))) + (+ pos (js2-node-len name)) + 'font-lock-function-name-face + 'record)))) + +;; source: http://jsdoc.sourceforge.net/ +;; Note - this syntax is for Google's enhanced jsdoc parser that +;; allows type specifications, and needs work before entering the wild. + +(defconst js2-jsdoc-param-tag-regexp + (concat "^\\s-*\\*+\\s-*\\(@" + "\\(?:param\\|argument\\)" + "\\)" + "\\s-*\\({[^}]+}\\)?" ; optional type + "\\s-*\\([a-zA-Z0-9_$]+\\)?" ; name + "\\>") + "Matches jsdoc tags with optional type and optional param name.") + +(defconst js2-jsdoc-typed-tag-regexp + (concat "^\\s-*\\*+\\s-*\\(@\\(?:" + (regexp-opt + '("requires" "return" "returns" "throw" "throws")) + "\\)\\)\\s-*\\({[^}]+}\\)?") + "Matches jsdoc tags with optional type.") + +(defconst js2-jsdoc-arg-tag-regexp + (concat "^\\s-*\\*+\\s-*\\(@\\(?:" + (regexp-opt + '("base" "extends" "member" "type" "version")) + "\\)\\)\\s-+\\([^ \t]+\\)") + "Matches jsdoc tags with a single argument.") + +(defconst js2-jsdoc-empty-tag-regexp + (concat "^\\s-*\\*+\\s-*\\(@\\(?:" + (regexp-opt + '("addon" "author" "class" "constructor" "deprecated" "exec" + "exception" "fileoverview" "final" "ignore" "private")) + "\\)\\)\\s-*") + "Matches empty jsdoc tags.") + +(defconst js2-jsdoc-link-tag-regexp + "{\\(@link\\)\\s-+\\([^#}\n]+\\)\\(#.+\\)?}" + "Matches a jsdoc link tag.") + +(defconst js2-jsdoc-see-tag-regexp + "^\\s-*\\*+\\s-*\\(@see\\)\\s-+\\([^#}\n]+\\)\\(#.+\\)?" + "Matches a jsdoc @see tag.") + +(defconst js2-jsdoc-html-tag-regexp + "\\(</?\\)\\([a-zA-Z]+\\)\\s-*\\(/?>\\)" + "Matches a simple (no attributes) html start- or end-tag.") + +(defsubst js2-jsdoc-highlight-helper () + (js2-set-face (match-beginning 1) + (match-end 1) + 'js2-jsdoc-tag-face) + (if (match-beginning 2) + (if (save-excursion + (goto-char (match-beginning 2)) + (= (char-after) ?{)) + (js2-set-face (1+ (match-beginning 2)) + (1- (match-end 2)) + 'js2-jsdoc-type-face) + (js2-set-face (match-beginning 2) + (match-end 2) + 'js2-jsdoc-value-face))) + (if (match-beginning 3) + (js2-set-face (match-beginning 3) + (match-end 3) + 'js2-jsdoc-value-face))) + +(defun js2-highlight-jsdoc (ast) + "Highlight doc comment tags." + (let ((comments (js2-ast-root-comments ast)) + beg end) + (save-excursion + (dolist (node comments) + (when (eq (js2-comment-node-format node) 'jsdoc) + (setq beg (js2-node-abs-pos node) + end (+ beg (js2-node-len node))) + (save-restriction + (narrow-to-region beg end) + (dolist (re (list js2-jsdoc-param-tag-regexp + js2-jsdoc-typed-tag-regexp + js2-jsdoc-arg-tag-regexp + js2-jsdoc-link-tag-regexp + js2-jsdoc-see-tag-regexp + js2-jsdoc-empty-tag-regexp)) + (goto-char beg) + (while (re-search-forward re nil t) + (js2-jsdoc-highlight-helper))) + ;; simple highlighting for html tags + (goto-char beg) + (while (re-search-forward js2-jsdoc-html-tag-regexp nil t) + (js2-set-face (match-beginning 1) + (match-end 1) + 'js2-jsdoc-html-tag-delimiter-face) + (js2-set-face (match-beginning 2) + (match-end 2) + 'js2-jsdoc-html-tag-name-face) + (js2-set-face (match-beginning 3) + (match-end 3) + 'js2-jsdoc-html-tag-delimiter-face)))))))) + +(defun js2-highlight-assign-targets (node left right) + "Highlight function properties and external variables." + (let (leftpos end name) + ;; highlight vars and props assigned function values + (when (js2-function-node-p right) + (cond + ;; var foo = function() {...} + ((js2-name-node-p left) + (setq name left)) + + ;; foo.bar.baz = function() {...} + ((and (js2-prop-get-node-p left) + (js2-name-node-p (js2-prop-get-node-right left))) + (setq name (js2-prop-get-node-right left)))) + + (when name + (js2-set-face (setq leftpos (js2-node-abs-pos name)) + (+ leftpos (js2-node-len name)) + 'font-lock-function-name-face + 'record))) + + ;; save variable assignments so we can check for undeclared later + ;; (can't do it here since var decls can come at end of script) + (when (and js2-highlight-external-variables + (setq name (js2-member-expr-leftmost-name left))) + (push (list name js2-current-scope + (setq leftpos (js2-node-abs-pos name)) + (setq end (+ leftpos (js2-node-len name)))) + js2-recorded-assignments)))) + +(defun js2-highlight-undeclared-vars () + "After entire parse is finished, look for undeclared variable assignments. +Have to wait until entire buffer is parsed, since JavaScript permits var +decls to occur after they're used. + +We currently use a simple heuristic to rule out complaining about built-ins: +if the name is capitalized we don't highlight it. This could be improved a +bit by declaring all the Ecma global object, constructor and function names +in a hashtable, but we'd still wind up complaining about all the DHTML +builtins, the Mozilla builtins, etc." + (let (name first-char) + (dolist (entry js2-recorded-assignments) + (destructuring-bind (name-node scope pos end) entry + (setq name (js2-name-node-name name-node) + first-char (aref name 0)) + (unless (or (and (>= first-char ?A) (<= first-char ?Z)) + (js2-get-defining-scope scope name)) + (js2-set-face pos end 'js2-external-variable-face 'record) + (js2-record-text-property pos end 'help-echo "Undeclared variable") + (js2-record-text-property pos end 'point-entered #'js2-echo-help)))) + (setq js2-recorded-assignments nil))) + +(provide 'js2-highlight) + +;;; js2-highlight.el ends here +;;; js2-browse.el --- browsing/hierarchy support for js2-mode + +;; Author: Steve Yegge (steve.yegge@gmail.com) +;; Keywords: javascript languages + +;; Commentary: +;; +;; We currently only support imenu, but eventually should support speedbar and +;; possibly other browsing mechanisms. +;; +;; The basic strategy is to identify function assignment targets of the form +;; `foo.bar.baz', convert them to (list foo bar baz <position>), and push the +;; list into `js2-imenu-recorder'. The lists are merged into a trie-like tree +;; for imenu after parsing is finished. +;; +;; A `foo.bar.baz' assignment target may be expressed in many ways in +;; JavaScript, and the general problem is undecidable. However, several forms +;; are readily recognizable at parse-time; the forms we attempt to recognize +;; include: +;; +;; function foo() -- function declaration +;; foo = function() -- function expression assigned to variable +;; foo.bar.baz = function() -- function expr assigned to nested property-get +;; foo = {bar: function()} -- fun prop in object literal assigned to var +;; foo = {bar: {baz: function()}} -- inside nested object literal +;; foo.bar = {baz: function()}} -- obj lit assigned to nested prop get +;; a.b = {c: {d: function()}} -- nested obj lit assigned to nested prop get +;; foo = {get bar() {...}} -- getter/setter in obj literal +;; function foo() {function bar() {...}} -- nested function +;; foo['a'] = function() -- fun expr assigned to deterministic element-get +;; +;; This list boils down to a few forms that can be combined recursively. +;; Top-level named function declarations include both the left-hand (name) +;; and the right-hand (function value) expressions needed to produce an imenu +;; entry. The other "right-hand" forms we need to look for are: +;; - functions declared as props/getters/setters in object literals +;; - nested named function declarations +;; The "left-hand" expressions that functions can be assigned to include: +;; - local/global variables +;; - nested property-get expressions like a.b.c.d +;; - element gets like foo[10] or foo['bar'] where the index +;; expression can be trivially converted to a property name. They +;; effectively then become property gets. +;; +;; All the different definition types are canonicalized into the form +;; foo.bar.baz = position-of-function-keyword +;; +;; We need to build a trie-like structure for imenu. As an example, +;; consider the following JavaScript code: +;; +;; a = function() {...} // function at position 5 +;; b = function() {...} // function at position 25 +;; foo = function() {...} // function at position 100 +;; foo.bar = function() {...} // function at position 200 +;; foo.bar.baz = function() {...} // function at position 300 +;; foo.bar.zab = function() {...} // function at position 400 +;; +;; During parsing we accumulate an entry for each definition in +;; the variable `js2-imenu-recorder', like so: +;; +;; '((a 5) +;; (b 25) +;; (foo 100) +;; (foo bar 200) +;; (foo bar baz 300) +;; (foo bar zab 400)) +;; +;; After parsing these entries are merged into this alist-trie: +;; +;; '((a . 1) +;; (b . 2) +;; (foo (<definition> . 3) +;; (bar (<definition> . 6) +;; (baz . 100) +;; (zab . 200)))) +;; +;; Note the wacky need for a <definition> name. The token can be anything +;; that isn't a valid JavaScript identifier, because you might make foo +;; a function and then start setting properties on it that are also functions. + +;;; Code: + + +(defsubst js2-prop-node-name (node) + "Return the name of a node that may be a property-get/property-name. +If NODE is not a valid name-node, string-node or integral number-node, +returns nil. Otherwise returns the string name/value of the node." + (cond + ((js2-name-node-p node) + (js2-name-node-name node)) + ((js2-string-node-p node) + (js2-string-node-value node)) + ((and (js2-number-node-p node) + (string-match "^[0-9]+$" (js2-number-node-value node))) + (js2-number-node-value node)) + ((js2-this-node-p node) + "this"))) + +(defsubst js2-node-qname-component (node) + "Test function: return the name of this node, if it contributes to a qname. +Returns nil if the node doesn't contribute." + (copy-sequence + (or (js2-prop-node-name node) + (if (and (js2-function-node-p node) + (js2-function-node-name node)) + (js2-name-node-name (js2-function-node-name node)))))) + +(defsubst js2-record-function-qname (fn-node qname) + "Associate FN-NODE with its QNAME for later lookup. +This is used in postprocessing the chain list. When we find a chain +whose first element is a js2-THIS keyword node, we look up the parent +function and see (using this map) whether it is the tail of a chain. +If so, we replace the this-node with a copy of the parent's qname." + (unless js2-imenu-function-map + (setq js2-imenu-function-map (make-hash-table :test 'eq))) + (puthash fn-node qname js2-imenu-function-map)) + +(defun js2-record-imenu-functions (node &optional var) + "Record function definitions for imenu. +NODE is a function node or an object literal. +VAR, if non-nil, is the expression that NODE is being assigned to." + (when js2-parse-ide-mode + (let ((fun-p (js2-function-node-p node)) + qname left fname-node pos) + (cond + ;; non-anonymous function declaration? + ((and fun-p + (not var) + (setq fname-node (js2-function-node-name node))) + (push (setq qname (list fname-node (js2-node-pos node))) + js2-imenu-recorder) + (js2-record-function-qname node qname)) + + ;; for remaining forms, compute left-side tree branch first + ((and var (setq qname (js2-compute-nested-prop-get var))) + (cond + ;; foo.bar.baz = function + (fun-p + (push (nconc qname (list (js2-node-pos node))) + js2-imenu-recorder) + (js2-record-function-qname node qname)) + ;; foo.bar.baz = object-literal + ;; look for nested functions: {a: {b: function() {...} }} + ((js2-object-node-p node) + (js2-record-object-literal node qname)))))))) + +(defun js2-compute-nested-prop-get (node) + "If NODE is of form foo.bar.baz, return component nodes as a list. +Otherwise returns nil. Element-gets can be treated as property-gets +if the index expression is a name, a string, or a positive integer." + (let (left right head) + (cond + ((or (js2-name-node-p node) + (js2-this-node-p node)) + (list node)) + ;; foo.bar.baz is parenthesized as (foo.bar).baz => right operand is a leaf + ((js2-prop-get-node-p node) ; includes elem-get nodes + (setq left (js2-prop-get-node-left node) + right (js2-prop-get-node-right node)) + (if (and (or (js2-prop-get-node-p left) ; left == foo.bar + (js2-name-node-p left) + (js2-this-node-p left)) ; or left == foo + (or (js2-name-node-p right) ; .bar + (js2-string-node-p right) ; ['bar'] + (and (js2-number-node-p right) ; [10] + (string-match "^[0-9]+$" + (js2-number-node-value right))))) + (if (setq head (js2-compute-nested-prop-get left)) + (nconc head (list right)))))))) + +(defun js2-record-object-literal (node qname) + "Recursively process an object literal looking for functions. +NODE is an object literal that is the right-hand child of an assignment +expression. QNAME is a list of nodes representing the assignment target, +e.g. for foo.bar.baz = {...}, QNAME is (foo-node bar-node baz-node). +We do a depth-first traversal of NODE. Any functions we find are prefixed +with QNAME plus the property name of the function and appended to the +variable `js2-imenu-recorder'." + ;; Elements are relative to parent position, which is still absolute, + ;; since the parser passes the assignment target and value expressions + ;; to us before they are added as children of the assignment node. + (let ((pos (js2-node-pos node)) + left right) + (dolist (e (js2-object-node-elems node)) ; e is a `js2-object-prop-node' + (setq left (js2-infix-node-left e)) + (cond + ;; foo: function() {...} + ((js2-function-node-p (setq right (js2-infix-node-right e))) + (when (js2-prop-node-name left) + ;; As a policy decision, we record the position of the property, + ;; not the position of the `function' keyword, since the property + ;; is effectively the name of the function. + (push (append qname (list left) (list (+ pos (js2-node-pos e)))) + js2-imenu-recorder) + (js2-record-function-qname right qname))) + ;; foo: {object-literal} -- add foo to qname and recurse + ((js2-object-node-p right) + (js2-record-object-literal right + (append qname (list (js2-infix-node-left e))))))))) + +(defsubst js2-node-top-level-decl-p (node) + "Return t if NODE's name is defined in the top-level scope. +Also returns t if NODE's name is not defined in any scope, since it implies +that it's an external variable, which must also be in the top-level scope." + (let* ((name (js2-prop-node-name node)) + (this-scope (js2-node-get-enclosing-scope node)) + defining-scope) + (cond + ((js2-this-node-p node) + nil) + ((null this-scope) + t) + ((setq defining-scope (js2-get-defining-scope this-scope name)) + (js2-ast-root-p defining-scope)) + (t t)))) + +(defun js2-browse-postprocess-chains (chains) + "Modify function-declaration name chains after parsing finishes. +Some of the information is only available after the parse tree is complete. +For instance, following a 'this' reference requires a parent function node." + (let (result head fn parent-chain p elem) + (dolist (chain chains) + ;; examine the head of each node to get its defining scope + (setq head (car chain)) + (cond + ;; if top-level/external, keep as-is + ((js2-node-top-level-decl-p head) + (push chain result)) + ;; check for a this-reference + ((eq (js2-node-type head) js2-THIS) + (setq fn (js2-node-parent-script-or-fn head)) + ;; if there is no parent function, or if the parent function + ;; is nested, discard the head node and keep the rest of the chain. + (if (or (null fn) (js2-nested-function-p fn)) + (push (cdr chain) result) + ;; else look up parent in function-map. If not found, discard chain. + (when (setq parent-chain (and js2-imenu-function-map + (gethash fn js2-imenu-function-map))) + ;; else discard head node and prefix parent fn qname, which is + ;; the parent-chain sans tail, to this chain. + (push (append (butlast parent-chain) (cdr chain)) result)))))) + ;; finally replace each node in each chain with its name. + (dolist (chain result) + (setq p chain) + (while p + (if (js2-node-p (setq elem (car p))) + (setcar p (js2-node-qname-component elem))) + (setq p (cdr p)))) + result)) + +;; Merge name chains into a trie-like tree structure of nested lists. +;; To simplify construction of the trie, we first build it out using the rule +;; that the trie consists of lists of pairs. Each pair is a 2-element array: +;; [key, num-or-list]. The second element can be a number; if so, this key +;; is a leaf-node with only one value. (I.e. there is only one declaration +;; associated with the key at this level.) Otherwise the second element is +;; a list of pairs, with the rule applied recursively. This symmetry permits +;; a simple recursive formulation. +;; +;; js2-mode is building the data structure for imenu. The imenu documentation +;; claims that it's the structure above, but in practice it wants the children +;; at the same list level as the key for that level, which is how I've drawn +;; the "Expected final result" above. We'll postprocess the trie to remove the +;; list wrapper around the children at each level. +;; +;; A completed nested imenu-alist entry looks like this: +;; '(("foo" +;; ("<definition>" . 7) +;; ("bar" +;; ("a" . 40) +;; ("b" . 60)))) +;; +;; In particular, the documentation for `imenu--index-alist' says that +;; a nested sub-alist element looks like (INDEX-NAME SUB-ALIST). +;; The sub-alist entries immediately follow INDEX-NAME, the head of the list. + +(defsubst js2-treeify (lst) + "Convert (a b c d) to (a ((b ((c d)))))" + (if (null (cddr lst)) ; list length <= 2 + lst + (list (car lst) (list (js2-treeify (cdr lst)))))) + +(defun js2-build-alist-trie (chains trie) + "Merge declaration name chains into a trie-like alist structure for imenu. +CHAINS is the qname chain list produced during parsing. TRIE is a +list of elements built up so far." + (let (head tail pos branch kids) + (dolist (chain chains) + (setq head (car chain) + tail (cdr chain) + pos (if (numberp (car tail)) (car tail)) + branch (js2-find-if (lambda (n) + (string= (car n) head)) + trie) + kids (second branch)) + (cond + ;; case 1: this key isn't in the trie yet + ((null branch) + (if trie + (setcdr (last trie) (list (js2-treeify chain))) + (setq trie (list (js2-treeify chain))))) + + ;; case 2: key is present with a single number entry: replace w/ list + ;; ("a1" 10) + ("a1" 20) => ("a1" (("<definition>" 10) + ;; ("<definition>" 20))) + ((numberp kids) + (setcar (cdr branch) + (list (list "<definition-1>" kids) + (if pos + (list "<definition-2>" pos) + (js2-treeify tail))))) + + ;; case 3: key is there (with kids), and we're a number entry + (pos + (setcdr (last kids) + (list + (list (format "<definition-%d>" + (1+ (loop for kid in kids + count (eq ?< (aref (car kid) 0))))) + pos)))) + + ;; case 4: key is there with kids, need to merge in our chain + (t + (js2-build-alist-trie (list tail) kids)))) + trie)) + +(defun js2-flatten-trie (trie) + "Convert TRIE to imenu-format. +Recurses through nodes, and for each one whose second element is a list, +appends the list's flattened elements to the current element. Also +changes the tails into conses. For instance, this pre-flattened trie + +'(a ((b 20) + (c ((d 30) + (e 40))))) + +becomes + +'(a (b . 20) + (c (d . 30) + (e . 40))) + +Note that the root of the trie has no key, just a list of chains. +This is also true for the value of any key with multiple children, +e.g. key 'c' in the example above." + (cond + ((listp (car trie)) + (mapcar #'js2-flatten-trie trie)) + (t + (if (numberp (second trie)) + (cons (car trie) (second trie)) + ;; else pop list and append its kids + (apply #'append (list (car trie)) (js2-flatten-trie (cdr trie))))))) + +(defun js2-build-imenu-index () + "Turn `js2-imenu-recorder' into an imenu data structure." + (unless (eq js2-imenu-recorder 'empty) + (let* ((chains (js2-browse-postprocess-chains js2-imenu-recorder)) + (result (js2-build-alist-trie chains nil))) + (js2-flatten-trie result)))) + +(defun js2-test-print-chains (chains) + "Print a list of qname chains. +Each element of CHAINS is a list of the form (NODE [NODE *] pos); +i.e. one or more nodes, and an integer position as the list tail." + (mapconcat (lambda (chain) + (concat "(" + (mapconcat (lambda (elem) + (if (js2-node-p elem) + (or (js2-node-qname-component elem) + "nil") + (number-to-string elem))) + chain + " ") + ")")) + chains + "\n")) + + +(provide 'js2-browse) + +;;; js2-browse.el ends here +;;; js2-parse.el --- JavaScript parser + +;; Author: Steve Yegge (steve.yegge@gmail.com) +;; Keywords: javascript languages + +;; Commentary: + +;; This is based on Rhino's parser and tries to follow its code +;; structure as closely as practical, so that changes to the Rhino +;; parser can easily be propagated into this code. However, Rhino +;; does not currently generate a usable AST representation, at least +;; from an IDE perspective, so we build our own more suitable AST. + +;; The AST node structures are defined in `js2-ast.el'. +;; Every parser function that creates and returns an AST node has +;; the following responsibilities: + +;; 1) set the node start to the absolute buffer start position +;; 2) set the node length to include any closing chars (RC, SEMI) +;; 3) fix up any child-node starts to be relative to this node +;; 4) set any field positions (e.g. keywords) relative to this node +;; 5) report any child nodes with `js2-node-add-children' +;; (note that this call fixes up start positions by default) + +;; The resulting AST has all node start positions relative to the +;; parent nodes; only the root has an absolute start position. + +;; Note: fontification is done inline while parsing. It used to be +;; done in a second pass over the AST, but doing it inline is about +;; twice as fast. Most of the fontification happens when tokens are +;; scanned, and the parser has a few spots that perform extra +;; fontification. In addition to speed, a second benefit of inline +;; parsing is that if a long parse is interrupted, everything parsed +;; so far is still fontified. + +;; The editing mode that uses this parser, `js2-mode', directs the +;; parser to check periodically for user input. If user input +;; arrives, the parse is abandoned, except for the highlighting that +;; has occurred so far, and a re-parse is rescheduled for when Emacs +;; becomes idle again. This works pretty well, but could be better. +;; In particular, when the user input has not resulted in changes to +;; the buffer (for instance, navigation input), the parse tree built +;; so far should not be discarded, and the parse should continue where +;; it left off. It will be some work to create what amounts to a +;; continuation, but it should not be unreasonably difficult. + +;; TODO: +;; - make non-editing input restart parse at previous continuation +;; - in Eclipse, sibling nodes never overlap start/end ranges +;; - for getters, prop name and function nodes overlap +;; - should write a debug tree visitor to look for overlaps +;; - mark array and object literals as "destructuring" (node prop?) +;; so we can syntax-highlight them properly. +;; - figure out a way not to store value in string/name nodes +;; - needs a solution for synthetic nodes + +;;; Code + +(eval-and-compile + (require 'cl)) ; for delete-if + + +(defconst js2-version "1.7.0" + "Version of JavaScript supported, plus minor js2 version.") + +(defmacro js2-record-face (face) + "Record a style run of FACE for the current token." + `(js2-set-face js2-token-beg js2-token-end ,face 'record)) + +(defsubst js2-node-end (n) + "Computes the absolute end of node N. +Use with caution! Assumes `js2-node-pos' is -absolute-, which +is only true until the node is added to its parent; i.e., while parsing." + (+ (js2-node-pos n) + (js2-node-len n))) + +(defsubst js2-record-comment () + (push (make-js2-comment-node :len (- js2-token-end js2-token-beg) + :format js2-ts-comment-type) + js2-scanned-comments) + (when js2-parse-ide-mode + (js2-record-face 'font-lock-comment-face) + (when (memq js2-ts-comment-type '(html preprocessor)) + ;; Tell cc-engine the bounds of the comment. + (put-text-property js2-token-beg (1- js2-token-end) 'c-in-sws t)))) + +;; This function is called depressingly often, so it should be fast. +;; Most of the time it's looking at the same token it peeked before. +(defsubst js2-peek-token () + "Returns the next token without consuming it. +If previous token was consumed, calls scanner to get new token. +If previous token was -not- consumed, returns it (idempotent). + +This function will not return a newline (js2-EOL) - instead, it +gobbles newlines until it finds a non-newline token, and flags +that token as appearing just after a newline. + +This function will also not return a js2-COMMENT. Instead, it +records comments found in `js2-scanned-comments'. If the token +returned by this function immediately follows a jsdoc comment, +the token is flagged as such. + +Note that this function always returned the un-flagged token! +The flags, if any, are saved in `js2-current-flagged-token'." + (if (/= js2-current-flagged-token js2-EOF) ; last token not consumed + js2-current-token ; most common case - return already-peeked token + (let ((tt (js2-get-token)) ; call scanner + saw-eol + face) + ;; process comments and whitespace + (while (or (= tt js2-EOL) + (= tt js2-COMMENT)) + (if (= tt js2-EOL) + (setq saw-eol t) + (setq saw-eol nil) + (if js2-record-comments + (js2-record-comment))) + (setq tt (js2-get-token))) ; call scanner + + (setq js2-current-token tt + js2-current-flagged-token (if saw-eol + (logior tt js2-ti-after-eol) + tt)) + ;; perform lexical fontification as soon as token is scanned + (when js2-parse-ide-mode + (cond + ((minusp tt) + (js2-record-face 'js2-error-face)) + ((setq face (aref js2-kwd-tokens tt)) + (js2-record-face face)) + ((and (= tt js2-NAME) + (equal js2-ts-string "undefined")) + (js2-record-face 'font-lock-constant-face)))) + tt))) ; return unflagged token + +(defsubst js2-peek-flagged-token () + "Returns the current token along with any flags set for it." + (js2-peek-token) + js2-current-flagged-token) + +(defsubst js2-consume-token () + (setq js2-current-flagged-token js2-EOF)) + +(defsubst js2-next-token () + (prog1 + (js2-peek-token) + (js2-consume-token))) + +(defsubst js2-next-flagged-token () + (js2-peek-token) + (prog1 js2-current-flagged-token + (js2-consume-token))) + +(defsubst js2-match-token (match) + "Consume and return t if next token matches MATCH, a bytecode. +Returns nil and consumes nothing if MATCH is not the next token." + (if (/= (js2-peek-token) match) + nil + (js2-consume-token) + t)) + +(defsubst js2-valid-prop-name-token (tt) + (or (= tt js2-NAME) + (and js2-allow-keywords-as-property-names + (plusp tt) + (aref js2-kwd-tokens tt)))) + +(defsubst js2-match-prop-name () + "Consume token and return t if next token is a valid property name. +It's valid if it's a js2-NAME, or `js2-allow-keywords-as-property-names' +is non-nil and it's a keyword token." + (if (js2-valid-prop-name-token (js2-peek-token)) + (progn + (js2-consume-token) + t) + nil)) + +(defsubst js2-must-match-prop-name (msg-id &optional pos len) + (if (js2-match-prop-name) + t + (js2-report-error msg-id nil pos len) + nil)) + +(defsubst js2-peek-token-or-eol () + "Return js2-EOL if the current token immediately follows a newline. +Else returns the current token. Used in situations where we don't +consider certain token types valid if they are preceded by a newline. +One example is the postfix ++ or -- operator, which has to be on the +same line as its operand." + (let ((tt (js2-peek-token))) + ;; Check for last peeked token flags + (if (js2-flag-set-p js2-current-flagged-token js2-ti-after-eol) + js2-EOL + tt))) + +(defsubst js2-set-check-for-label () + (assert (= (logand js2-current-flagged-token js2-clear-ti-mask) js2-NAME)) + (js2-set-flag js2-current-flagged-token js2-ti-check-label)) + +(defsubst js2-must-match (token msg-id &optional pos len) + "Match next token to token code TOKEN, or record a syntax error. +MSG-ID is the error message to report if the match fails. +Returns t on match, nil if no match." + (if (js2-match-token token) + t + (js2-report-error msg-id nil pos len) + nil)) + +(defsubst js2-inside-function () + (plusp js2-nesting-of-function)) + +(defsubst js2-set-requires-activation () + (if (js2-function-node-p js2-current-script-or-fn) + (setf (js2-function-node-needs-activation js2-current-script-or-fn) t))) + +(defsubst js2-check-activation-name (name token) + (when (js2-inside-function) + ;; skip language-version 1.2 check from Rhino + (if (or (string= "arguments" name) + (and js2-compiler-activation-names ; only used in codegen + (gethash name js2-compiler-activation-names))) + (js2-set-requires-activation)))) + +(defsubst js2-set-is-generator () + (if (js2-function-node-p js2-current-script-or-fn) + (setf (js2-function-node-is-generator js2-current-script-or-fn) t))) + +(defsubst js2-must-have-xml () + (unless js2-compiler-xml-available + (js2-report-error "msg.XML.not.available"))) + +(defsubst js2-push-scope (scope) + "Push SCOPE, a `js2-scope', onto the lexical scope chain." + (assert (js2-scope-p scope)) + (assert (null (js2-scope-parent-scope scope))) + (assert (neq js2-current-scope scope)) + (setf (js2-scope-parent-scope scope) js2-current-scope + js2-current-scope scope)) + +(defsubst js2-pop-scope () + (setq js2-current-scope + (js2-scope-parent-scope js2-current-scope))) + +(defsubst js2-enter-loop (loop-node) + (push loop-node js2-loop-set) + (push loop-node js2-loop-and-switch-set) + (js2-push-scope loop-node) + ;; Tell the current labeled statement (if any) its statement, + ;; and set the jump target of the first label to the loop. + ;; These are used in `js2-parse-continue' to verify that the + ;; continue target is an actual labeled loop. (And for codegen.) + (when js2-labeled-stmt + (setf (js2-labeled-stmt-node-stmt js2-labeled-stmt) loop-node + (js2-label-node-loop (car (js2-labeled-stmt-node-labels + js2-labeled-stmt))) loop-node))) + +(defsubst js2-exit-loop () + (pop js2-loop-set) + (pop js2-loop-and-switch-set) + (js2-pop-scope)) + +(defsubst js2-enter-switch (switch-node) + (push switch-node js2-loop-and-switch-set)) + +(defsubst js2-exit-switch () + (pop js2-loop-and-switch-set)) + +(defun js2-parse (&optional buf cb) + "Tells the js2 parser to parse a region of JavaScript. + +BUF is a buffer or buffer name containing the code to parse. +Call `narrow-to-region' first to parse only part of the buffer. + +The returned AST root node is given some additional properties: + `node-count' - total number of nodes in the AST + `buffer' - BUF. The buffer it refers to may change or be killed, + so the value is not necessarily reliable. + +An optional callback CB can be specified to report parsing +progress. If `(functionp CB)' returns t, it will be called with +the current line number once before parsing begins, then again +each time the lexer reaches a new line number. + +CB can also be a list of the form `(symbol cb ...)' to specify +multiple callbacks with different criteria. Each symbol is a +criterion keyword, and the following element is the callback to +call + + :line - called whenever the line number changes + :token - called for each new token consumed + +The list of criteria could be extended to include entering or +leaving a statement, an expression, or a function definition." + (if (and cb (not (functionp cb))) + (error "criteria callbacks not yet implemented")) + (let ((inhibit-point-motion-hooks t) + (js2-compiler-xml-available (>= js2-language-version 160)) + ;; This is a recursive-descent parser, so give it a big stack. + (max-lisp-eval-depth (max max-lisp-eval-depth 3000)) + (max-specpdl-size (max max-specpdl-size 3000)) + (case-fold-search nil) + ast) + (or buf (setq buf (current-buffer))) + (save-excursion + (set-buffer buf) + (setq js2-scanned-comments nil + js2-parsed-errors nil + js2-parsed-warnings nil + js2-imenu-recorder nil + js2-imenu-function-map nil + js2-label-set nil) + (js2-init-scanner) + (setq ast (js2-with-unmodifying-text-property-changes + (js2-do-parse))) + (unless js2-ts-hit-eof + (js2-report-error "msg.got.syntax.errors" (length js2-parsed-errors))) + (setf (js2-ast-root-errors ast) js2-parsed-errors + (js2-ast-root-warnings ast) js2-parsed-warnings) + ;; if we didn't find any declarations, put a dummy in this list so we + ;; don't end up re-parsing the buffer in `js2-mode-create-imenu-index' + (unless js2-imenu-recorder + (setq js2-imenu-recorder 'empty)) + (run-hooks 'js2-parse-finished-hook) + ast))) + +;; Corresponds to Rhino's Parser.parse() method. +(defun js2-do-parse () + "Parse current buffer starting from current point. +Scanner should be initialized." + (let ((pos js2-ts-cursor) + (end js2-ts-cursor) ; in case file is empty + root n tt) + ;; initialize buffer-local parsing vars + (setf root (make-js2-ast-root :buffer (buffer-name) :pos pos) + js2-current-script-or-fn root + js2-current-scope root + js2-current-flagged-token js2-EOF + js2-nesting-of-function 0 + js2-labeled-stmt nil + js2-recorded-assignments nil) ; for js2-highlight + + (while (/= (setq tt (js2-peek-token)) js2-EOF) + (if (= tt js2-FUNCTION) + (progn + (js2-consume-token) + (setq n (js2-parse-function (if js2-called-by-compile-function + 'FUNCTION_EXPRESSION + 'FUNCTION_STATEMENT))) + (js2-record-imenu-functions n)) + ;; not a function - parse a statement + (setq n (js2-parse-statement))) + ;; add function or statement to script + (setq end (js2-node-end n)) + (js2-block-node-push root n)) + + ;; add comments to root in lexical order + (when js2-scanned-comments + ;; if we find a comment beyond end of normal kids, use its end + (setq end (max end (js2-node-end (first js2-scanned-comments)))) + (dolist (comment js2-scanned-comments) + (push comment (js2-ast-root-comments root)) + (js2-node-add-children root comment))) + + (setf (js2-node-len root) (- end pos)) + (js2-highlight-undeclared-vars) + root)) + +(defun js2-function-parser () + (js2-consume-token) + (js2-parse-function 'FUNCTION_EXPRESSION_STATEMENT)) + +(defun js2-parse-function-body (fn-node) + (js2-must-match js2-LC "msg.no.brace.body") + (let ((pos js2-token-beg) ; LC position + (pn (make-js2-block-node)) ; starts at LC position + tt + end) + (incf js2-nesting-of-function) + (unwind-protect + (while (not (or (= (setq tt (js2-peek-token)) js2-ERROR) + (= tt js2-EOF) + (= tt js2-RC))) + (js2-block-node-push pn (if (/= tt js2-FUNCTION) + (js2-parse-statement) + (js2-consume-token) + (js2-parse-function 'FUNCTION_STATEMENT)))) + (decf js2-nesting-of-function)) + (setq end js2-token-end) ; assume no curly and leave at current token + (if (js2-must-match js2-RC "msg.no.brace.after.body" pos) + (setq end js2-token-end)) + (setf (js2-node-pos pn) pos + (js2-node-len pn) (- end pos)) + (setf (js2-function-node-body fn-node) pn) + (js2-node-add-children fn-node pn) + pn)) + +(defun js2-parse-function-params (fn-node pos) + (if (js2-match-token js2-RP) + (setf (js2-function-node-rp fn-node) (- js2-token-beg pos)) + (let (params len param) + (loop for tt = (js2-peek-token) + do + (cond + ;; destructuring param + ((or (= tt js2-LB) (= tt js2-LC)) + (push (js2-parse-primary-expr) params)) + ;; simple name + (t + (js2-must-match js2-NAME "msg.no.parm") + (js2-record-face 'js2-function-param-face) + (setq param (js2-create-name-node)) + (js2-define-symbol js2-LP js2-ts-string param) + (push param params))) + while + (js2-match-token js2-COMMA)) + (if (js2-must-match js2-RP "msg.no.paren.after.parms") + (setf (js2-function-node-rp fn-node) (- js2-token-beg pos))) + (dolist (p params) + (js2-node-add-children fn-node p) + (push p (js2-function-node-params fn-node)))))) + +(defsubst js2-check-inconsistent-return-warning (fn-node name) + "Possibly show inconsistent-return warning. +Last token scanned is the close-curly for the function body." + (when (and js2-mode-show-strict-warnings + js2-strict-inconsistent-return-warning + (not (js2-has-consistent-return-usage + (js2-function-node-body fn-node)))) + ;; Have it extend from close-curly to bol or beginning of block. + (let ((pos (save-excursion + (goto-char js2-token-end) + (max (js2-node-abs-pos (js2-function-node-body fn-node)) + (point-at-bol)))) + (end js2-token-end)) + (if (plusp (js2-name-node-length name)) + (js2-add-strict-warning "msg.no.return.value" + (js2-name-node-name name) pos end) + (js2-add-strict-warning "msg.anon.no.return.value" nil pos end))))) + +(defun js2-parse-function (function-type) + "Function parser. FUNCTION-TYPE is a symbol." + (let ((pos js2-token-beg) ; start of 'function' keyword + name + name-beg + name-end + fn-node + lp + (synthetic-type function-type) + member-expr-node) + + ;; parse function name, expression, or non-name (anonymous) + (cond + ;; function foo(...) + ((js2-match-token js2-NAME) + (setq name (js2-create-name-node t) + name-beg js2-token-beg + name-end js2-token-end) + (unless (js2-match-token js2-LP) + (when js2-allow-member-expr-as-function-name + ;; function foo.bar(...) + (setq member-expr-node name + name nil + member-expr-node (js2-parse-member-expr-tail + nil member-expr-node))) + (js2-must-match js2-LP "msg.no.paren.parms"))) + + ((js2-match-token js2-LP) + nil) ; anonymous function: leave name as null + + (t + ;; function random-member-expr(...) + (when js2-allow-member-expr-as-function-name + ;; Note that memberExpr can not start with '(' like + ;; in function (1+2).toString(), because 'function (' already + ;; processed as anonymous function + (setq member-expr-node (js2-parse-member-expr))) + (js2-must-match js2-LP "msg.no.paren.parms"))) + + (if (= js2-current-token js2-LP) ; eventually matched LP? + (setq lp js2-token-beg)) + + (if member-expr-node + (progn + (setq synthetic-type 'FUNCTION_EXPRESSION) + (js2-parse-highlight-member-expr-fn-name member-expr-node)) + (if name + (js2-set-face name-beg name-end + 'font-lock-function-name-face 'record))) + + (if (and (neq synthetic-type 'FUNCTION_EXPRESSION) + (plusp (js2-name-node-length name))) + ;; Function statements define a symbol in the enclosing scope + (js2-define-symbol js2-FUNCTION (js2-name-node-name name) fn-node)) + + (setf fn-node (make-js2-function-node :pos pos + :name name + :form function-type + :lp (if lp (- lp pos)))) + + (if (or (js2-inside-function) (plusp js2-nesting-of-with)) + ;; 1. Nested functions are not affected by the dynamic scope flag + ;; as dynamic scope is already a parent of their scope. + ;; 2. Functions defined under the with statement also immune to + ;; this setup, in which case dynamic scope is ignored in favor + ;; of the with object. + (setf (js2-function-node-ignore-dynamic fn-node) t)) + + ;; dynamically bind all the per-function variables + (let ((js2-current-script-or-fn fn-node) + (js2-current-scope fn-node) + (js2-nesting-of-with 0) + (js2-end-flags 0) + js2-label-set + js2-loop-set + js2-loop-and-switch-set) + + ;; parse params and function body + (js2-parse-function-params fn-node pos) + (js2-parse-function-body fn-node) + (if name + (js2-node-add-children fn-node name)) + + (js2-check-inconsistent-return-warning fn-node name) + + ;; Function expressions define a name only in the body of the + ;; function, and only if not hidden by a parameter name + (if (and name + (eq synthetic-type 'FUNCTION_EXPRESSION) + (null (js2-scope-get-symbol js2-current-scope + (js2-name-node-name name)))) + (js2-define-symbol js2-FUNCTION + (js2-name-node-name name) + fn-node)) + (if (and name + (eq function-type 'FUNCTION_EXPRESSION_STATEMENT)) + (js2-record-imenu-functions fn-node))) + + (setf (js2-node-len fn-node) (- js2-ts-cursor pos) + (js2-function-node-member-expr fn-node) member-expr-node) ; may be nil + + ;; Rhino doesn't do this, but we need it for finding undeclared vars. + ;; We wait until after parsing the function to set its parent scope, + ;; since `js2-define-symbol' needs the defining-scope check to stop + ;; at the function boundary when checking for redeclarations. + (setf (js2-scope-parent-scope fn-node) js2-current-scope) + + fn-node)) + +(defun js2-parse-statements (&optional parent) + "Parse a statement list. Last token consumed must be js2-LC. + +PARENT can be a `js2-block-node', in which case the statements are +appended to PARENT. Otherwise a new `js2-block-node' is created +and returned. + +This function does not match the closing js2-RC: the caller +matches the RC so it can provide a suitable error message if not +matched. This means it's up to the caller to set the length of +the node to include the closing RC. The node start pos is set to +the absolute buffer start position, and the caller should fix it +up to be relative to the parent node. All children of this block +node are given relative start positions and correct lengths." + (let ((pn (or parent (make-js2-block-node))) + tt) + (setf (js2-node-pos pn) js2-token-beg) + (while (and (> (setq tt (js2-peek-token)) js2-EOF) + (/= tt js2-RC)) + (js2-block-node-push pn (js2-parse-statement))) + pn)) + +(defun js2-parse-statement () + (let (tt pn beg end) + + ;; coarse-grained user-interrupt check - needs work + (and js2-parse-interruptable-p + (zerop (% (incf js2-parse-stmt-count) + js2-statements-per-pause)) + (input-pending-p) + (throw 'interrupted t)) + + (setq pn (js2-statement-helper)) + + ;; no-side-effects warning check + (unless (js2-node-has-side-effects pn) + (setq end (js2-node-end pn)) + (save-excursion + (goto-char end) + (setq beg (max (js2-node-pos pn) (point-at-bol)))) + (js2-add-strict-warning "msg.no.side.effects" nil beg end)) + + pn)) + +;; These correspond to the switch cases in Parser.statementHelper +(defconst js2-parsers + (let ((parsers (make-vector js2-num-tokens + #'js2-parse-expr-stmt))) + (aset parsers js2-BREAK #'js2-parse-break) + (aset parsers js2-CONST #'js2-parse-const-var) + (aset parsers js2-CONTINUE #'js2-parse-continue) + (aset parsers js2-DEBUGGER #'js2-parse-debugger) + (aset parsers js2-DEFAULT #'js2-parse-default-xml-namespace) + (aset parsers js2-DO #'js2-parse-do) + (aset parsers js2-FOR #'js2-parse-for) + (aset parsers js2-FUNCTION #'js2-function-parser) + (aset parsers js2-IF #'js2-parse-if) + (aset parsers js2-LC #'js2-parse-block) + (aset parsers js2-LET #'js2-parse-let-stmt) + (aset parsers js2-NAME #'js2-parse-name-or-label) + (aset parsers js2-RETURN #'js2-parse-ret-yield) + (aset parsers js2-SEMI #'js2-parse-semi) + (aset parsers js2-SWITCH #'js2-parse-switch) + (aset parsers js2-THROW #'js2-parse-throw) + (aset parsers js2-TRY #'js2-parse-try) + (aset parsers js2-VAR #'js2-parse-const-var) + (aset parsers js2-WHILE #'js2-parse-while) + (aset parsers js2-WITH #'js2-parse-with) + (aset parsers js2-YIELD #'js2-parse-ret-yield) + parsers) + "A vector mapping token types to parser functions.") + +(defsubst js2-parse-warn-missing-semi (beg end) + (and js2-mode-show-strict-warnings + js2-strict-missing-semi-warning + (js2-add-strict-warning + "msg.missing.semi" nil + ;; back up to beginning of statement or line + (max beg (save-excursion + (goto-char end) + (point-at-bol))) + end))) + +(defconst js2-no-semi-insertion + (list js2-IF + js2-SWITCH + js2-WHILE + js2-DO + js2-FOR + js2-TRY + js2-WITH + js2-LC + js2-ERROR + js2-SEMI + js2-FUNCTION) + "List of tokens that don't do automatic semicolon insertion.") + +(defconst js2-autoinsert-semi-and-warn + (list js2-ERROR js2-EOF js2-RC)) + +(defun js2-statement-helper () + (let* ((tt (js2-peek-token)) + (first-tt tt) + (beg js2-token-beg) + (parser (if (= tt js2-ERROR) + #'js2-parse-semi + (aref js2-parsers tt))) + pn + tt-flagged) + ;; If the statement is set, then it's been told its label by now. + (and js2-labeled-stmt + (js2-labeled-stmt-node-stmt js2-labeled-stmt) + (setq js2-labeled-stmt nil)) + + (setq pn (funcall parser) + tt-flagged (js2-peek-flagged-token) + tt (logand tt-flagged js2-clear-ti-mask)) + + ;; Don't do auto semi insertion for certain statement types. + (unless (or (memq first-tt js2-no-semi-insertion) + (js2-labeled-stmt-node-p pn)) + (cond + ((= tt js2-SEMI) + ;; Consume ';' as a part of expression + (js2-consume-token) + ;; extend the node bounds to include the semicolon. + (setf (js2-node-len pn) (- js2-token-end beg))) + ((memq tt js2-autoinsert-semi-and-warn) + ;; Autoinsert ; + (js2-parse-warn-missing-semi beg (js2-node-end pn))) + (t + (if (js2-flag-not-set-p tt-flagged js2-ti-after-eol) + ;; Report error if no EOL or autoinsert ';' otherwise + (js2-report-error "msg.no.semi.stmt") + (js2-parse-warn-missing-semi beg (js2-node-end pn)))))) + pn)) + +(defun js2-parse-condition () + "Parse a parenthesized boolean expression, e.g. in an if- or while-stmt. +The parens are discarded and the expression node is returned. +The `pos' field of the return value is set to an absolute position +that must be fixed up by the caller. +Return value is a list (EXPR LP RP), with absolute paren positions." + (let (pn lp rp) + (if (js2-must-match js2-LP "msg.no.paren.cond") + (setq lp js2-token-beg)) + (setq pn (js2-parse-expr)) + (if (js2-must-match js2-RP "msg.no.paren.after.cond") + (setq rp js2-token-beg)) + ;; Report strict warning on code like "if (a = 7) ..." + (if (and js2-strict-cond-assign-warning + (js2-assign-node-p pn)) + (js2-add-strict-warning "msg.equal.as.assign" nil + (js2-node-pos pn) + (+ (js2-node-pos pn) + (js2-node-len pn)))) + (list pn lp rp))) + +(defun js2-parse-if () + "Parser for if-statement. Last matched token must be js2-IF." + (let ((pos js2-token-beg) + cond + if-true + if-false + else-pos + end + pn) + (js2-consume-token) + (setq cond (js2-parse-condition) + if-true (js2-parse-statement) + if-false (if (js2-match-token js2-ELSE) + (progn + (setq else-pos (- js2-token-beg pos)) + (js2-parse-statement))) + end (js2-node-end (or if-false if-true)) + pn (make-js2-if-node :pos pos + :len (- end pos) + :condition (car cond) + :then-part if-true + :else-part if-false + :else-pos else-pos + :lp (js2-relpos (second cond) pos) + :rp (js2-relpos (third cond) pos))) + (js2-node-add-children pn (car cond) if-true if-false) + pn)) + +(defun js2-parse-switch () + "Parser for if-statement. Last matched token must be js2-SWITCH." + (let ((pos js2-token-beg) + tt + pn + discriminant + has-default + case-expr + case-node + case-pos + cases + stmt + lp + rp) + (js2-consume-token) + (if (js2-must-match js2-LP "msg.no.paren.switch") + (setq lp js2-token-beg)) + (setq discriminant (js2-parse-expr) + pn (make-js2-switch-node :discriminant discriminant + :pos pos + :lp (js2-relpos lp pos))) + (js2-node-add-children pn discriminant) + (js2-enter-switch pn) + (unwind-protect + (progn + (if (js2-must-match js2-RP "msg.no.paren.after.switch") + (setf (js2-switch-node-rp pn) (- js2-token-beg pos))) + (js2-must-match js2-LC "msg.no.brace.switch") + (catch 'break + (while t + (setq tt (js2-next-token) + case-pos js2-token-beg) + (cond + ((= tt js2-RC) + (setf (js2-node-len pn) (- js2-token-end pos)) + (throw 'break nil)) ; done + + ((= tt js2-CASE) + (setq case-expr (js2-parse-expr)) + (js2-must-match js2-COLON "msg.no.colon.case")) + + ((= tt js2-DEFAULT) + (if has-default + (js2-report-error "msg.double.switch.default")) + (setq has-default t + case-expr nil) + (js2-must-match js2-COLON "msg.no.colon.case")) + + (t + (js2-report-error "msg.bad.switch") + (throw 'break nil))) + + (setq case-node (make-js2-case-node :pos case-pos + :len (- js2-token-end case-pos) + :expr case-expr)) + (js2-node-add-children case-node case-expr) + (while (and (/= (setq tt (js2-peek-token)) js2-RC) + (/= tt js2-CASE) + (/= tt js2-DEFAULT) + (/= tt js2-EOF)) + (setf stmt (js2-parse-statement) + (js2-node-len case-node) (- (js2-node-end stmt) case-pos)) + (js2-block-node-push case-node stmt)) + (push case-node cases))) + ;; add cases last, as pushing reverses the order to be correct + (dolist (kid cases) + (js2-node-add-children pn kid) + (push kid (js2-switch-node-cases pn))) + pn) ; return value + (js2-exit-switch)))) + +(defun js2-parse-while () + "Parser for while-statement. Last matched token must be js2-WHILE." + (let ((pos js2-token-beg) + (pn (make-js2-while-node)) + cond + body) + (js2-consume-token) + (js2-enter-loop pn) + (unwind-protect + (progn + (setf cond (js2-parse-condition) + (js2-while-node-condition pn) (car cond) + body (js2-parse-statement) + (js2-while-node-body pn) body + (js2-node-len pn) (- (js2-node-end body) pos) + (js2-while-node-lp pn) (js2-relpos (second cond) pos) + (js2-while-node-rp pn) (js2-relpos (third cond) pos)) + (js2-node-add-children pn body (car cond))) + (js2-exit-loop)) + pn)) + +(defun js2-parse-do () + "Parser for do-statement. Last matched token must be js2-DO." + (let ((pos js2-token-beg) + (pn (make-js2-do-node)) + cond + body + end) + (js2-consume-token) + (js2-enter-loop pn) + (unwind-protect + (progn + (setq body (js2-parse-statement)) + (js2-must-match js2-WHILE "msg.no.while.do") + (setf (js2-do-node-while-pos pn) (- js2-token-beg pos) + cond (js2-parse-condition) + (js2-do-node-condition pn) (car cond) + (js2-do-node-body pn) body + end js2-ts-cursor + (js2-do-node-lp pn) (js2-relpos (second cond) pos) + (js2-do-node-rp pn) (js2-relpos (third cond) pos)) + (js2-node-add-children pn (car cond) body)) + (js2-exit-loop)) + ;; Always auto-insert semicolon to follow SpiderMonkey: + ;; It is required by ECMAScript but is ignored by the rest of + ;; world; see bug 238945 + (if (js2-match-token js2-SEMI) + (setq end js2-ts-cursor)) + (setf (js2-node-len pn) (- end pos)) + pn)) + +(defun js2-parse-for () + "Parser for for-statement. Last matched token must be js2-FOR. +Parses for, for-in, and for each-in statements." + (let ((for-pos js2-token-beg) + pn + is-for-each + is-for-in + in-pos + each-pos + tmp-pos + init ; Node init is also foo in 'foo in object' + cond ; Node cond is also object in 'foo in object' + incr ; 3rd section of for-loop initializer + body + tt + lp + rp) + (js2-consume-token) + ;; See if this is a for each () instead of just a for () + (when (js2-match-token js2-NAME) + (if (string= "each" js2-ts-string) + (progn + (setq is-for-each t + each-pos (- js2-token-beg for-pos)) ; relative + (js2-record-face 'font-lock-keyword-face)) + (js2-report-error "msg.no.paren.for"))) + + (if (js2-must-match js2-LP "msg.no.paren.for") + (setq lp (- js2-token-beg for-pos))) + (setq tt (js2-peek-token)) + + ;; parse init clause + (let ((js2-in-for-init t)) ; set as dynamic variable + (cond + ((= tt js2-SEMI) + (setq init (make-js2-empty-expr-node))) + ((or (= tt js2-VAR) (= tt js2-LET)) + (js2-consume-token) + (setq init (js2-parse-variables tt js2-token-beg))) + (t + (setq init (js2-parse-expr))))) + + (if (js2-match-token js2-IN) + (setq is-for-in t + in-pos (- js2-token-beg for-pos) + cond (js2-parse-expr)) ; object over which we're iterating + ;; else ordinary for loop - parse cond and incr + (js2-must-match js2-SEMI "msg.no.semi.for") + (setq cond (if (= (js2-peek-token) js2-SEMI) + (make-js2-empty-expr-node) ; no loop condition + (js2-parse-expr))) + (js2-must-match js2-SEMI "msg.no.semi.for.cond") + (setq tmp-pos js2-token-end + incr (if (= (js2-peek-token) js2-RP) + (make-js2-empty-expr-node :pos tmp-pos) + (js2-parse-expr)))) + + (if (js2-must-match js2-RP "msg.no.paren.for.ctrl") + (setq rp (- js2-token-beg for-pos))) + (if (not is-for-in) + (setq pn (make-js2-for-node :init init + :condition cond + :update incr + :lp lp + :rp rp)) + ;; cond could be null if 'in obj' got eaten by the init node. + (if (js2-infix-node-p init) + ;; it was (foo in bar) instead of (var foo in bar) + (setq cond (js2-infix-node-right init) + init (js2-infix-node-left init)) + (if (and (js2-var-decl-node-p init) + (> (length (js2-var-decl-node-kids init)) 1)) + (js2-report-error "msg.mult.index"))) + + (setq pn (make-js2-for-in-node :iterator init + :object cond + :in-pos in-pos + :foreach-p is-for-each + :each-pos each-pos + :lp lp + :rp rp))) + (unwind-protect + (progn + (js2-enter-loop pn) + ;; We have to parse the body -after- creating the loop node, + ;; so that the loop node appears in the js2-loop-set, allowing + ;; break/continue statements to find the enclosing loop. + (setf body (js2-parse-statement) + (js2-loop-node-body pn) body + (js2-node-pos pn) for-pos + (js2-node-len pn) (- (js2-node-end body) for-pos)) + (js2-node-add-children pn init cond incr body)) + ;; finally + (js2-exit-loop)) + pn)) + +(defun js2-parse-try () + "Parser for try-statement. Last matched token must be js2-TRY." + (let ((try-pos js2-token-beg) + try-end + try-block + catch-blocks + finally-block + saw-default-catch + peek + var-name + catch-cond + catch-node + guard-kwd + catch-pos + finally-pos + pn + block + lp + rp) + (js2-consume-token) + (if (/= (js2-peek-token) js2-LC) + (js2-report-error "msg.no.brace.try")) + (setq try-block (js2-parse-statement) + try-end (js2-node-end try-block) + peek (js2-peek-token)) + (cond + ((= peek js2-CATCH) + (while (js2-match-token js2-CATCH) + (setq catch-pos js2-token-beg + guard-kwd nil + catch-cond nil + lp nil + rp nil) + (if saw-default-catch + (js2-report-error "msg.catch.unreachable")) + (if (js2-must-match js2-LP "msg.no.paren.catch") + (setq lp (- js2-token-beg catch-pos))) + + (js2-must-match js2-NAME "msg.bad.catchcond") + (setq var-name (js2-create-name-node)) + + (if (js2-match-token js2-IF) + (setq guard-kwd (- js2-token-beg catch-pos) + catch-cond (js2-parse-expr)) + (setq saw-default-catch t)) + + (if (js2-must-match js2-RP "msg.bad.catchcond") + (setq rp (- js2-token-beg catch-pos))) + (js2-must-match js2-LC "msg.no.brace.catchblock") + + (setq block (js2-parse-statements) + try-end (js2-node-end block) + catch-node (make-js2-catch-node :pos catch-pos + :var-name var-name + :guard-expr catch-cond + :guard-kwd guard-kwd + :block block + :lp lp + :rp rp)) + (if (js2-must-match js2-RC "msg.no.brace.after.body") + (setq try-end js2-token-beg)) + (setf (js2-node-len block) (- try-end (js2-node-pos block)) + (js2-node-len catch-node) (- try-end catch-pos)) + (js2-node-add-children catch-node var-name catch-cond block) + (push catch-node catch-blocks))) + + ((/= peek js2-FINALLY) + (js2-must-match js2-FINALLY "msg.try.no.catchfinally" + (js2-node-pos try-block) + (- (setq try-end (js2-node-end try-block)) + (js2-node-pos try-block))))) + + (when (js2-match-token js2-FINALLY) + (setq finally-pos js2-token-beg + block (js2-parse-statement) + try-end (js2-node-end block) + finally-block (make-js2-finally-node :pos finally-pos + :len (- try-end finally-pos) + :body block)) + (js2-node-add-children finally-block block)) + + (setq pn (make-js2-try-node :pos try-pos + :len (- try-end try-pos) + :try-block try-block + :finally-block finally-block)) + (js2-node-add-children pn try-block finally-block) + + ;; push them onto the try-node, which reverses and corrects their order + (dolist (cb catch-blocks) + (js2-node-add-children pn cb) + (push cb (js2-try-node-catch-clauses pn))) + pn)) + +(defun js2-parse-throw () + "Parser for throw-statement. Last matched token must be js2-THROW." + (let ((pos js2-token-beg) + expr + pn) + (js2-consume-token) + (if (= (js2-peek-token-or-eol) js2-EOL) + ;; ECMAScript does not allow new lines before throw expression, + ;; see bug 256617 + (js2-report-error "msg.bad.throw.eol")) + (setq expr (js2-parse-expr) + pn (make-js2-throw-node :pos pos + :len (- (js2-node-end expr) pos) + :expr expr)) + (js2-node-add-children pn expr) + pn)) + +(defsubst js2-match-jump-label-name (label-name) + "If break/continue specified a label, return that label's labeled stmt. +Returns the corresponding `js2-labeled-stmt-node', or if LABEL-NAME +does not match an existing label, reports an error and returns nil." + (let ((bundle (cdr (assoc label-name js2-label-set)))) + (if (null bundle) + (js2-report-error "msg.undef.label")) + bundle)) + +(defun js2-parse-break () + "Parser for break-statement. Last matched token must be js2-BREAK." + (let ((pos js2-token-beg) + (end js2-token-end) + break-target ; statement to break from + break-label ; in "break foo", name-node representing the foo + labels ; matching labeled statement to break to + pn) + (js2-consume-token) ; `break' + (when (eq (js2-peek-token-or-eol) js2-NAME) + (js2-consume-token) + (setq break-label (js2-create-name-node) + end (js2-node-end break-label) + ;; matchJumpLabelName only matches if there is one + labels (js2-match-jump-label-name js2-ts-string) + break-target (if labels (car (js2-labeled-stmt-node-labels labels))))) + + (unless (or break-target break-label) + ;; no break target specified - try for innermost enclosing loop/switch + (if (null js2-loop-and-switch-set) + (unless break-label + (js2-report-error "msg.bad.break" nil pos (length "break"))) + (setq break-target (car js2-loop-and-switch-set)))) + + (setq pn (make-js2-break-node :pos pos + :len (- end pos) + :label break-label + :target break-target)) + (js2-node-add-children pn break-label) ; but not break-target + pn)) + +(defun js2-parse-continue () + "Parser for continue-statement. Last matched token must be js2-CONTINUE." + (let ((pos js2-token-beg) + (end js2-token-end) + label ; optional user-specified label, a `js2-name-node' + labels ; current matching labeled stmt, if any + target ; the `js2-loop-node' target of this continue stmt + pn) + (js2-consume-token) ; `continue' + (when (= (js2-peek-token-or-eol) js2-NAME) + (js2-consume-token) + (setq label (js2-create-name-node) + end (js2-node-end label) + ;; matchJumpLabelName only matches if there is one + labels (js2-match-jump-label-name js2-ts-string))) + (cond + ((null labels) ; no current label to go to + (if (null js2-loop-set) ; no loop to continue to + (js2-report-error "msg.continue.outside" nil pos + (length "continue")) + (setq target (car js2-loop-set)))) ; innermost enclosing loop + (t + (if (js2-loop-node-p (js2-labeled-stmt-node-stmt labels)) + (setq target (js2-labeled-stmt-node-stmt labels)) + (js2-report-error "msg.continue.nonloop" nil pos (- end pos))))) + + (setq pn (make-js2-continue-node :pos pos + :len (- end pos) + :label label + :target target)) + (js2-node-add-children pn label) ; but not target - it's not our child + pn)) + +(defun js2-parse-with () + "Parser for with-statement. Last matched token must be js2-WITH." + (js2-consume-token) + (let ((pos js2-token-beg) + obj body pn lp rp) + + (if (js2-must-match js2-LP "msg.no.paren.with") + (setq lp js2-token-beg)) + + (setq obj (js2-parse-expr)) + + (if (js2-must-match js2-RP "msg.no.paren.after.with") + (setq rp js2-token-beg)) + + (let ((js2-nesting-of-with (1+ js2-nesting-of-with))) + (setq body (js2-parse-statement))) + + (setq pn (make-js2-with-node :pos pos + :len (- (js2-node-end body) pos) + :object obj + :body body + :lp (js2-relpos lp pos) + :rp (js2-relpos rp pos))) + (js2-node-add-children pn obj body) + pn)) + +(defun js2-parse-const-var () + "Parser for var- or const-statement. +Last matched token must be js2-CONST or js2-VAR." + (let ((tt (js2-peek-token)) + (pos js2-token-beg) + expr + pn) + (js2-consume-token) + (setq expr (js2-parse-variables tt js2-token-beg) + pn (make-js2-expr-stmt-node :pos pos + :len (- (js2-node-end expr) pos) + :expr expr)) + (js2-node-add-children pn expr) + pn)) + +(defsubst js2-wrap-with-expr-stmt (pos expr &optional add-child) + (let ((pn (make-js2-expr-stmt-node :pos pos + :len (js2-node-len expr) + :type (if (js2-inside-function) + js2-EXPR_VOID + js2-EXPR_RESULT) + :expr expr))) + (if add-child + (js2-node-add-children pn expr)) + pn)) + +(defun js2-parse-let-stmt () + "Parser for let-statement. Last matched token must be js2-LET." + (js2-consume-token) + (let ((pos js2-token-beg) + expr + pn) + (if (= (js2-peek-token) js2-LP) + ;; let expression in statement context + (setq expr (js2-parse-let pos 'statement) + pn (js2-wrap-with-expr-stmt pos expr t)) + ;; else we're looking at a statement like let x=6, y=7; + (setf expr (js2-parse-variables js2-LET pos) + pn (js2-wrap-with-expr-stmt pos expr t) + (js2-node-type pn) js2-EXPR_RESULT)) + pn)) + +(defun js2-parse-ret-yield () + (js2-parse-return-or-yield (js2-peek-token) nil)) + +(defconst js2-parse-return-stmt-enders + (list js2-SEMI js2-RC js2-EOF js2-EOL js2-ERROR js2-RB js2-RP js2-YIELD)) + +(defsubst js2-now-all-set (before after mask) + "Return whether or not the bits in the mask have changed to all set. +BEFORE is bits before change, AFTER is bits after change, and MASK is +the mask for bits. Returns t if all the bits in the mask are set in AFTER +but not BEFORE." + (and (/= (logand before mask) mask) + (= (logand after mask) mask))) + +(defun js2-parse-return-or-yield (tt expr-context) + (let ((pos js2-token-beg) + (end js2-token-end) + (before js2-end-flags) + (inside-function (js2-inside-function)) + e + ret + name) + (unless inside-function + (js2-report-error (if (eq tt js2-RETURN) + "msg.bad.return" + "msg.bad.yield"))) + (js2-consume-token) + ;; This is ugly, but we don't want to require a semicolon. + (unless (memq (js2-peek-token-or-eol) js2-parse-return-stmt-enders) + (setq e (js2-parse-expr) + end (js2-node-end e))) + (cond + ((eq tt js2-RETURN) + (js2-set-flag js2-end-flags (if (null e) + js2-end-returns + js2-end-returns-value)) + (setq ret (make-js2-return-node :pos pos + :len (- end pos) + :retval e)) + (js2-node-add-children ret e) + ;; See if we need a strict mode warning. + ;; TODO: The analysis done by `js2-has-consistent-return-usage' is + ;; more thorough and accurate than this before/after flag check. + ;; E.g. if there's a finally-block that always returns, we shouldn't + ;; show a warning generated by inconsistent returns in the catch blocks. + ;; Basically `js2-has-consistent-return-usage' needs to keep more state, + ;; so we know which returns/yields to highlight, and we should get rid of + ;; all the checking in `js2-parse-return-or-yield'. + (if (and js2-strict-inconsistent-return-warning + (js2-now-all-set before js2-end-flags + (logior js2-end-returns js2-end-returns-value))) + (js2-add-strict-warning "msg.return.inconsistent" nil pos end))) + (t + (unless (js2-inside-function) + (js2-report-error "msg.bad.yield")) + (js2-set-flag js2-end-flags js2-end-yields) + (setq ret (make-js2-yield-node :pos pos + :len (- end pos) + :value e)) + (js2-node-add-children ret e) + (unless expr-context + (setq e ret + ret (js2-wrap-with-expr-stmt pos e t)) + (js2-set-requires-activation) + (js2-set-is-generator)))) + + ;; see if we are mixing yields and value returns. + (when (and inside-function + (js2-now-all-set before js2-end-flags + (logior js2-end-yields js2-end-returns-value))) + (setq name (js2-function-name js2-current-script-or-fn)) + (if (zerop (length name)) + (js2-report-error "msg.anon.generator.returns" nil pos (- end pos)) + (js2-report-error "msg.generator.returns" name pos (- end pos)))) + + ret)) + +(defun js2-parse-debugger () + (js2-consume-token) + (make-js2-keyword-node :type js2-DEBUGGER)) + +(defun js2-parse-block () + "Parser for a curly-delimited statement block. +Last token matched must be js2-LC." + (let ((pos js2-token-beg) + (pn (make-js2-scope))) + (js2-consume-token) + (js2-push-scope pn) + (unwind-protect + (progn + (js2-parse-statements pn) + (js2-must-match js2-RC "msg.no.brace.block") + (setf (js2-node-len pn) (- js2-token-end pos))) + (js2-pop-scope)) + pn)) + +;; for js2-ERROR too, to have a node for error recovery to work on +(defun js2-parse-semi () + "Parse a statement or handle an error. +Last matched token is js-SEMI or js-ERROR." + (let ((tt (js2-peek-token)) pos len) + (js2-consume-token) + (if (eq tt js2-SEMI) + (make-js2-empty-expr-node :len 1) + (setq pos js2-token-beg + len (- js2-token-beg pos)) + (js2-report-error "msg.syntax" nil pos len) + (make-js2-error-node :pos pos :len len)))) + +(defun js2-parse-default-xml-namespace () + "Parse a `default xml namespace = <expr>' e4x statement." + (let ((pos js2-token-beg) + end len expr unary es) + (js2-consume-token) + (js2-must-have-xml) + (js2-set-requires-activation) + (setq len (- js2-ts-cursor pos)) + (unless (and (js2-match-token js2-NAME) + (string= js2-ts-string "xml")) + (js2-report-error "msg.bad.namespace" nil pos len)) + (unless (and (js2-match-token js2-NAME) + (string= js2-ts-string "namespace")) + (js2-report-error "msg.bad.namespace" nil pos len)) + (unless (js2-match-token js2-ASSIGN) + (js2-report-error "msg.bad.namespace" nil pos len)) + (setq expr (js2-parse-expr) + end (js2-node-end expr) + unary (make-js2-unary-node :type js2-DEFAULTNAMESPACE + :pos pos + :len (- end pos) + :operand expr)) + (js2-node-add-children unary expr) + (make-js2-expr-stmt-node :pos pos + :len (- end pos) + :expr unary))) + +(defun js2-record-label (label bundle) + ;; current token should be colon that `js2-parse-primary-expr' left untouched + (js2-consume-token) + (let ((name (js2-label-node-name label)) + labeled-stmt + dup) + (when (setq labeled-stmt (cdr (assoc name js2-label-set))) + ;; flag both labels if possible when used in editing mode + (if (and js2-parse-ide-mode + (setq dup (js2-get-label-by-name labeled-stmt name))) + (js2-report-error "msg.dup.label" nil + (js2-node-abs-pos dup) (js2-node-len dup))) + (js2-report-error "msg.dup.label" nil + (js2-node-pos label) (js2-node-len label))) + (js2-labeled-stmt-node-add-label bundle label) + (js2-node-add-children bundle label) + ;; Add one reference to the bundle per label in `js2-label-set' + (push (cons name bundle) js2-label-set))) + +(defun js2-parse-name-or-label () + "Parser for identifier or label. Last token matched must be js2-NAME. +Called when we found a name in a statement context. If it's a label, we gather +up any following labels and the next non-label statement into a +`js2-labeled-stmt-node' bundle and return that. Otherwise we parse an +expression and return it wrapped in a `js2-expr-stmt-node'." + (let ((pos js2-token-beg) + (end js2-token-end) + expr + stmt + pn + bundle + (continue t)) + ;; set check for label and call down to `js2-parse-primary-expr' + (js2-set-check-for-label) + (setq expr (js2-parse-expr)) + + (if (/= (js2-node-type expr) js2-LABEL) + ;; Parsed non-label expression - wrap with expression stmt. + (setq pn (js2-wrap-with-expr-stmt pos expr t)) + + ;; else parsed a label + (setq bundle (make-js2-labeled-stmt-node :pos pos)) + (js2-record-label expr bundle) + + ;; look for more labels + (while (and continue (= (js2-peek-token) js2-NAME)) + (js2-set-check-for-label) + (setq expr (js2-parse-expr)) + (if (/= (js2-node-type expr) js2-LABEL) + (setq stmt (js2-wrap-with-expr-stmt pos expr t) + continue nil) + (js2-record-label expr bundle))) + + ;; no more labels; now parse the labeled statement + (unwind-protect + (unless stmt + (let ((js2-labeled-stmt bundle)) ; bind dynamically + (setq stmt (js2-statement-helper)))) + ;; remove the labels for this statement from the global set + (dolist (label (js2-labeled-stmt-node-labels bundle)) + (setq js2-label-set (remove label js2-label-set)))) + + (setf (js2-labeled-stmt-node-stmt bundle) stmt) + (js2-node-add-children bundle stmt) + bundle))) + +(defun js2-parse-expr-stmt () + "Default parser in statement context, if no recognized statement found." + (js2-wrap-with-expr-stmt js2-token-beg (js2-parse-expr) t)) + +(defun js2-parse-variables (decl-type pos) + "Parse a comma-separated list of variable declarations. +Could be a 'var', 'const' or 'let' expression, possibly in a for-loop initializer. + +DECL-TYPE is a token value: either VAR, CONST, or LET depending on context. +For 'var' or 'const', the keyword should be the token last scanned. + +POS is the position where the node should start. It's sometimes the +var/const/let keyword, and other times the beginning of the first token +in the first variable declaration. + +Returns the parsed `js2-var-decl-node' expression node." + (let* ((result (make-js2-var-decl-node :decl-type decl-type + :pos pos)) + destructuring + kid-pos + tt + init + name + end + nbeg nend + vi + (continue t)) + ;; Example: + ;; var foo = {a: 1, b: 2}, bar = [3, 4]; + ;; var {b: s2, a: s1} = foo, x = 6, y, [s3, s4] = bar; + (while continue + (setq destructuring nil + name nil + tt (js2-peek-token) + kid-pos js2-token-beg + end js2-token-end + init nil) + (if (or (= tt js2-LB) (= tt js2-LC)) + ;; Destructuring assignment, e.g., var [a, b] = ... + (setq destructuring (js2-parse-primary-expr) + end (js2-node-end destructuring)) + ;; Simple variable name + (when (js2-must-match js2-NAME "msg.bad.var") + (setq name (js2-create-name-node) + nbeg js2-token-beg + nend js2-token-end + end nend) + (js2-define-symbol decl-type js2-ts-string name js2-in-for-init))) + + (when (js2-match-token js2-ASSIGN) + (setq init (js2-parse-assign-expr) + end (js2-node-end init)) + (if (and js2-parse-ide-mode + (or (js2-object-node-p init) + (js2-function-node-p init))) + (js2-record-imenu-functions init name))) + + (when name + (js2-set-face nbeg nend (if (js2-function-node-p init) + 'font-lock-function-name-face + 'font-lock-variable-name-face) + 'record)) + + (setq vi (make-js2-var-init-node :pos kid-pos + :len (- end kid-pos) + :type decl-type)) + (if destructuring + (progn + (if (and (null init) (not js2-in-for-init)) + (js2-report-error "msg.destruct.assign.no.init")) + (setf (js2-var-init-node-target vi) destructuring)) + (setf (js2-var-init-node-target vi) name)) + (setf (js2-var-init-node-initializer vi) init) + (js2-node-add-children vi name destructuring init) + + (js2-block-node-push result vi) + (unless (js2-match-token js2-COMMA) + (setq continue nil))) + + (setf (js2-node-len result) (- end pos)) + result)) + +(defun js2-parse-let (pos &optional stmt-p) + "Parse a let expression or statement. +A let-expression is of the form `let (vars) expr'. +A let-statment is of the form `let (vars) {statements}'. +The third form of let is a variable declaration list, handled +by `js2-parse-variables'." + (let ((pn (make-js2-let-node :pos pos)) + beg vars body) + (if (js2-must-match js2-LP "msg.no.paren.after.let") + (setf (js2-let-node-lp pn) (- js2-token-beg pos))) + (js2-push-scope pn) + (unwind-protect + (progn + (setq vars (js2-parse-variables js2-LET js2-token-beg)) + (if (js2-must-match js2-RP "msg.no.paren.let") + (setf (js2-let-node-rp pn) (- js2-token-beg pos))) + (if (and stmt-p (eq (js2-peek-token) js2-LC)) + ;; let statement + (progn + (js2-consume-token) + (setf beg js2-token-beg ; position stmt at LC + body (js2-parse-statements)) + (js2-must-match js2-RC "msg.no.curly.let") + (setf (js2-node-len body) (- js2-token-end beg) + (js2-node-len pn) (- js2-token-end pos) + (js2-let-node-body pn) body + (js2-node-type pn) js2-LET)) + ;; let expression + (setf body (js2-parse-expr) + (js2-node-len pn) (- (js2-node-end body) pos) + (js2-let-node-body pn) body)) + (js2-node-add-children pn vars body)) + (js2-pop-scope)) + pn)) + +(defsubst js2-define-new-symbol (decl-type name node) + (js2-scope-put-symbol js2-current-scope + name + (make-js2-symbol decl-type name node))) + +(defun js2-define-symbol (decl-type name &optional node ignore-not-in-block) + "Define a symbol in the current scope. +If NODE is non-nil, it is the AST node associated with the symbol." + (let* ((defining-scope (js2-get-defining-scope js2-current-scope name)) + (symbol (if defining-scope + (js2-scope-get-symbol defining-scope name))) + (sdt (if symbol (js2-symbol-decl-type symbol) -1))) + (cond + ((and symbol ; already defined + (or (= sdt js2-CONST) ; old version is const + (= decl-type js2-CONST) ; new version is const + ;; two let-bound vars in this block have same name + (and (= sdt js2-LET) + (eq defining-scope js2-current-scope)))) + (js2-report-error + (cond + ((= sdt js2-CONST) "msg.const.redecl") + ((= sdt js2-LET) "msg.let.redecl") + ((= sdt js2-VAR) "msg.var.redecl") + ((= sdt js2-FUNCTION) "msg.function.redecl") + (t "msg.parm.redecl")) + name)) + + ((= decl-type js2-LET) + (if (and (not ignore-not-in-block) + (or (= (js2-node-type js2-current-scope) js2-IF) + (js2-loop-node-p js2-current-scope))) + (js2-report-error "msg.let.decl.not.in.block") + (js2-define-new-symbol decl-type name node))) + + ((or (= decl-type js2-VAR) + (= decl-type js2-CONST) + (= decl-type js2-FUNCTION)) + (if symbol + (if (and js2-strict-var-redeclaration-warning (= sdt js2-VAR)) + (js2-add-strict-warning "msg.var.redecl" name) + (if (and js2-strict-var-hides-function-arg-warning (= sdt js2-LP)) + (js2-add-strict-warning "msg.var.hides.arg" name))) + (js2-define-new-symbol decl-type name node))) + + ((= decl-type js2-LP) + (if symbol + ;; must be duplicate parameter. Second parameter hides the + ;; first, so go ahead and add the second pararameter + (js2-report-warning "msg.dup.parms" name)) + (js2-define-new-symbol decl-type name node)) + + (t (js2-code-bug))))) + +(defun js2-parse-expr () + (let* ((pn (js2-parse-assign-expr)) + (pos (js2-node-pos pn)) + left + right + op-pos) + (while (js2-match-token js2-COMMA) + (setq op-pos (- js2-token-beg pos)) ; relative + (if (= (js2-peek-token) js2-YIELD) + (js2-report-error "msg.yield.parenthesized")) + (setq right (js2-parse-assign-expr) + left pn + pn (make-js2-infix-node :type js2-COMMA + :pos pos + :len (- js2-ts-cursor pos) + :op-pos op-pos + :left left + :right right)) + (js2-node-add-children pn left right)) + pn)) + +(defun js2-parse-assign-expr () + (let ((tt (js2-peek-token)) + (pos js2-token-beg) + pn + left + right + op-pos) + (if (= tt js2-YIELD) + (js2-parse-return-or-yield tt t) + ;; not yield - parse assignment expression + (setq pn (js2-parse-cond-expr) + tt (js2-peek-token)) + (when (and (<= js2-first-assign tt) + (<= tt js2-last-assign)) + (js2-consume-token) + (setq op-pos (- js2-token-beg pos) ; relative + left pn + right (js2-parse-assign-expr) + pn (make-js2-assign-node :type tt + :pos pos + :len (- (js2-node-end right) pos) + :op-pos op-pos + :left left + :right right)) + (when js2-parse-ide-mode + (js2-highlight-assign-targets pn left right) + (if (or (js2-function-node-p right) + (js2-object-node-p right)) + (js2-record-imenu-functions right left))) + ;; do this last so ide checks above can use absolute positions + (js2-node-add-children pn left right)) + pn))) + +(defun js2-parse-cond-expr () + (let ((pos js2-token-beg) + (pn (js2-parse-or-expr)) + test-expr + if-true + if-false + q-pos + c-pos) + (when (js2-match-token js2-HOOK) + (setq q-pos (- js2-token-beg pos) + if-true (js2-parse-assign-expr)) + (js2-must-match js2-COLON "msg.no.colon.cond") + (setq c-pos (- js2-token-beg pos) + if-false (js2-parse-assign-expr) + test-expr pn + pn (make-js2-cond-node :pos pos + :len (- (js2-node-end if-false) pos) + :test-expr test-expr + :true-expr if-true + :false-expr if-false + :q-pos q-pos + :c-pos c-pos)) + (js2-node-add-children pn test-expr if-true if-false)) + pn)) + +(defun js2-make-binary (type left parser) + "Helper for constructing a binary-operator AST node. +LEFT is the left-side-expression, already parsed, and the +binary operator should have just been matched. +PARSER is a function to call to parse the right operand, +or a `js2-node' struct if it has already been parsed." + (let* ((pos (js2-node-pos left)) + (op-pos (- js2-token-beg pos)) + (right (if (js2-node-p parser) + parser + (funcall parser))) + (pn (make-js2-infix-node :type type + :pos pos + :len (- (js2-node-end right) pos) + :op-pos op-pos + :left left + :right right))) + (js2-node-add-children pn left right) + pn)) + +(defun js2-parse-or-expr () + (let ((pn (js2-parse-and-expr))) + (when (js2-match-token js2-OR) + (setq pn (js2-make-binary js2-OR + pn + 'js2-parse-or-expr))) + pn)) + +(defun js2-parse-and-expr () + (let ((pn (js2-parse-bit-or-expr))) + (when (js2-match-token js2-AND) + (setq pn (js2-make-binary js2-AND + pn + 'js2-parse-and-expr))) + pn)) + +(defun js2-parse-bit-or-expr () + (let ((pn (js2-parse-bit-xor-expr))) + (while (js2-match-token js2-BITOR) + (setq pn (js2-make-binary js2-BITOR + pn + 'js2-parse-bit-xor-expr))) + pn)) + +(defun js2-parse-bit-xor-expr () + (let ((pn (js2-parse-bit-and-expr))) + (while (js2-match-token js2-BITXOR) + (setq pn (js2-make-binary js2-BITXOR + pn + 'js2-parse-bit-and-expr))) + pn)) + +(defun js2-parse-bit-and-expr () + (let ((pn (js2-parse-eq-expr))) + (while (js2-match-token js2-BITAND) + (setq pn (js2-make-binary js2-BITAND + pn + 'js2-parse-eq-expr))) + pn)) + +(defconst js2-parse-eq-ops + (list js2-EQ js2-NE js2-SHEQ js2-SHNE)) + +(defun js2-parse-eq-expr () + (let ((pn (js2-parse-rel-expr)) + tt) + (while (memq (setq tt (js2-peek-token)) js2-parse-eq-ops) + (js2-consume-token) + (setq pn (js2-make-binary tt + pn + 'js2-parse-rel-expr))) + pn)) + +(defconst js2-parse-rel-ops + (list js2-IN js2-INSTANCEOF js2-LE js2-LT js2-GE js2-GT)) + +(defun js2-parse-rel-expr () + (let ((pn (js2-parse-shift-expr)) + (continue t) + tt) + (while continue + (setq tt (js2-peek-token)) + (cond + ((and js2-in-for-init (= tt js2-IN)) + (setq continue nil)) + ((memq tt js2-parse-rel-ops) + (js2-consume-token) + (setq pn (js2-make-binary tt pn 'js2-parse-shift-expr))) + (t + (setq continue nil)))) + pn)) + +(defconst js2-parse-shift-ops + (list js2-LSH js2-URSH js2-RSH)) + +(defun js2-parse-shift-expr () + (let ((pn (js2-parse-add-expr)) + tt + (continue t)) + (while continue + (setq tt (js2-peek-token)) + (if (memq tt js2-parse-shift-ops) + (progn + (js2-consume-token) + (setq pn (js2-make-binary tt pn 'js2-parse-add-expr))) + (setq continue nil))) + pn)) + +(defun js2-parse-add-expr () + (let ((pn (js2-parse-mul-expr)) + tt + (continue t)) + (while continue + (setq tt (js2-peek-token)) + (if (or (= tt js2-ADD) (= tt js2-SUB)) + (progn + (js2-consume-token) + (setq pn (js2-make-binary tt pn 'js2-parse-mul-expr))) + (setq continue nil))) + pn)) + +(defconst js2-parse-mul-ops + (list js2-MUL js2-DIV js2-MOD)) + +(defun js2-parse-mul-expr () + (let ((pn (js2-parse-unary-expr)) + tt + (continue t)) + (while continue + (setq tt (js2-peek-token)) + (if (memq tt js2-parse-mul-ops) + (progn + (js2-consume-token) + (setq pn (js2-make-binary tt pn 'js2-parse-unary-expr))) + (setq continue nil))) + pn)) + +(defsubst js2-make-unary (type parser &rest args) + "Make a unary node of type TYPE. +PARSER is either a node (for postfix operators) or a function to call +to parse the operand (for prefix operators)." + (let* ((pos js2-token-beg) + (postfix (js2-node-p parser)) + (expr (if postfix + parser + (apply parser args))) + end + pn) + (if postfix ; e.g. i++ + (setq pos (js2-node-pos expr) + end js2-token-end) + (setq end (js2-node-end expr))) + (setq pn (make-js2-unary-node :type type + :pos pos + :len (- end pos) + :operand expr)) + (js2-node-add-children pn expr) + pn)) + +(defconst js2-incrementable-node-types + (list js2-NAME js2-GETPROP js2-GETELEM js2-GET_REF js2-CALL) + "Node types that can be the operand of a ++ or -- operator.") + +(defsubst js2-check-bad-inc-dec (tt beg end unary) + (unless (memq (js2-node-type (js2-unary-node-operand unary)) + js2-incrementable-node-types) + (js2-report-error (if (= tt js2-INC) + "msg.bad.incr" + "msg.bad.decr") + nil beg (- end beg)))) + +(defun js2-parse-unary-expr () + (let ((tt (js2-peek-token)) + pn expr beg end) + (cond + ((or (= tt js2-VOID) + (= tt js2-NOT) + (= tt js2-BITNOT) + (= tt js2-TYPEOF)) + (js2-consume-token) + (js2-make-unary tt 'js2-parse-unary-expr)) + + ((= tt js2-ADD) + (js2-consume-token) + ;; Convert to special POS token in decompiler and parse tree + (js2-make-unary js2-POS 'js2-parse-unary-expr)) + + ((= tt js2-SUB) + (js2-consume-token) + ;; Convert to special NEG token in decompiler and parse tree + (js2-make-unary js2-NEG 'js2-parse-unary-expr)) + + ((or (= tt js2-INC) + (= tt js2-DEC)) + (js2-consume-token) + (prog1 + (setq beg js2-token-beg + end js2-token-end + expr (js2-make-unary tt 'js2-parse-member-expr t)) + (js2-check-bad-inc-dec tt beg end expr))) + + ((= tt js2-DELPROP) + (js2-consume-token) + (js2-make-unary js2-DELPROP 'js2-parse-unary-expr)) + + ((= tt js2-ERROR) + (js2-consume-token) + (make-js2-error-node)) ; try to continue + + ((and (= tt js2-LT) + js2-compiler-xml-available) + ;; XML stream encountered in expression. + (js2-consume-token) + (js2-parse-member-expr-tail t (js2-parse-xml-initializer))) + (t + (setq pn (js2-parse-member-expr t) + ;; Don't look across a newline boundary for a postfix incop. + tt (js2-peek-token-or-eol)) + (when (or (= tt js2-INC) (= tt js2-DEC)) + (js2-consume-token) + (setf expr pn + pn (js2-make-unary tt expr)) + (js2-node-set-prop pn 'postfix t) + (js2-check-bad-inc-dec tt js2-token-beg js2-token-end pn)) + pn)))) + +(defun js2-parse-xml-initializer () + "Parse an E4X XML initializer. +I'm parsing it the way Rhino parses it, but without the tree-rewriting. +Then I'll postprocess the result, depending on whether we're in IDE +mode or codegen mode, and generate the appropriate rewritten AST. +IDE mode uses a rich AST that models the XML structure. Codegen mode +just concatenates everything and makes a new XML or XMLList out of it." + (let ((tt (js2-get-first-xml-token)) + pn-xml + pn + expr + kids + expr-pos + (continue t) + (first-token t)) + (when (not (or (= tt js2-XML) (= tt js2-XMLEND))) + (js2-report-error "msg.syntax")) + (setq pn-xml (make-js2-xml-node)) + (while continue + (if first-token + (setq first-token nil) + (setq tt (js2-get-next-xml-token))) + (cond + ;; js2-XML means we found a {expr} in the XML stream. + ;; The js2-ts-string is the XML up to the left-curly. + ((= tt js2-XML) + (push (make-js2-string-node :pos js2-token-beg + :len (- js2-ts-cursor js2-token-beg)) + kids) + (js2-must-match js2-LC "msg.syntax") + (setq expr-pos js2-ts-cursor + expr (if (eq (js2-peek-token) js2-RC) + (make-js2-empty-expr-node :pos expr-pos) + (js2-parse-expr))) + (js2-must-match js2-RC "msg.syntax") + (setq pn (make-js2-xml-js-expr-node :pos (js2-node-pos expr) + :len (js2-node-len expr) + :expr expr)) + (js2-node-add-children pn expr) + (push pn kids)) + + ;; a js2-XMLEND token means we hit the final close-tag. + ((= tt js2-XMLEND) + (push (make-js2-string-node :pos js2-token-beg + :len (- js2-ts-cursor js2-token-beg)) + kids) + (dolist (kid (nreverse kids)) + (js2-block-node-push pn-xml kid)) + (setf (js2-node-len pn-xml) (- js2-ts-cursor + (js2-node-pos pn-xml)) + continue nil)) + (t + (js2-report-error "msg.syntax") + (setq continue nil)))) + pn-xml)) + + +(defun js2-parse-argument-list () + "Parse an argument list and return it as a lisp list of nodes. +Returns the list in reverse order. Consumes the right-paren token." + (let (result) + (unless (js2-match-token js2-RP) + (loop do + (if (= (js2-peek-token) js2-YIELD) + (js2-report-error "msg.yield.parenthesized")) + (push (js2-parse-assign-expr) result) + while + (js2-match-token js2-COMMA)) + (js2-must-match js2-RP "msg.no.paren.arg") + result))) + +(defun js2-parse-member-expr (&optional allow-call-syntax) + (let ((tt (js2-peek-token)) + pn + pos + target + args + beg + end + init + tail) + (if (/= tt js2-NEW) + (setq pn (js2-parse-primary-expr)) + ;; parse a 'new' expression + (js2-consume-token) + (setq pos js2-token-beg + beg pos + target (js2-parse-member-expr) + end (js2-node-end target) + pn (make-js2-new-node :pos pos + :target target + :len (- end pos))) + (js2-node-add-children pn target) + (when (js2-match-token js2-LP) + ;; Add the arguments to pn, if any are supplied. + (setf beg pos ; start of "new" keyword + pos js2-token-beg + args (nreverse (js2-parse-argument-list)) + (js2-new-node-args pn) args + end js2-token-end + (js2-new-node-lp pn) (- pos beg) + (js2-new-node-rp pn) (- end 1 beg)) + (apply #'js2-node-add-children pn args)) + + (when (and js2-allow-rhino-new-expr-initializer + (js2-match-token js2-LC)) + (setf init (js2-parse-object-literal) + end (js2-node-end init) + (js2-new-node-initializer pn) init) + (js2-node-add-children pn init)) + + (setf (js2-node-len pn) (- beg pos))) ; end outer if + + (js2-parse-member-expr-tail allow-call-syntax pn))) + +(defun js2-parse-member-expr-tail (allow-call-syntax pn) + "Parse a chain of property/array accesses or function calls. +Includes parsing for E4X operators like `..' and `.@'. +If ALLOW-CALL-SYNTAX is nil, stops when we encounter a left-paren. +Returns an expression tree that includes PN, the parent node." + (let ((beg (js2-node-pos pn)) + tt + (continue t)) + (while continue + (setq tt (js2-peek-token)) + (cond + ((or (= tt js2-DOT) (= tt js2-DOTDOT)) + (setq pn (js2-parse-property-access tt pn))) + + ((= tt js2-DOTQUERY) + (setq pn (js2-parse-dot-query pn))) + + ((= tt js2-LB) + (setq pn (js2-parse-element-get pn))) + + ((= tt js2-LP) + (if allow-call-syntax + (setq pn (js2-parse-function-call pn)) + (setq continue nil))) + (t + (setq continue nil)))) + (if (>= js2-highlight-level 2) + (js2-parse-highlight-member-expr-node pn)) + pn)) + +(defun js2-parse-dot-query (pn) + "Parse a dot-query expression, e.g. foo.bar.(@name == 2) +Last token parsed must be `js2-DOTQUERY'." + (let ((pos (js2-node-pos pn)) + op-pos + expr + end) + (js2-consume-token) + (js2-must-have-xml) + (js2-set-requires-activation) + (setq op-pos js2-token-beg + expr (js2-parse-expr) + end (js2-node-end expr) + pn (make-js2-xml-dot-query-node :left pn + :pos pos + :op-pos op-pos + :right expr)) + (js2-node-add-children pn + (js2-xml-dot-query-node-left pn) + (js2-xml-dot-query-node-right pn)) + (if (js2-must-match js2-RP "msg.no.paren") + (setf (js2-xml-dot-query-node-rp pn) js2-token-beg + end js2-token-end)) + (setf (js2-node-len pn) (- end pos)) + pn)) + +(defun js2-parse-element-get (pn) + "Parse an element-get expression, e.g. foo[bar]. +Last token parsed must be `js2-RB'." + (let ((lb js2-token-beg) + (pos (js2-node-pos pn)) + rb + expr) + (js2-consume-token) + (setq expr (js2-parse-expr)) + (if (js2-must-match js2-RB "msg.no.bracket.index") + (setq rb js2-token-beg)) + (setq pn (make-js2-elem-get-node :target pn + :pos pos + :element expr + :lb (js2-relpos lb pos) + :rb (js2-relpos rb pos) + :len (- js2-token-end pos))) + (js2-node-add-children pn + (js2-elem-get-node-target pn) + (js2-elem-get-node-element pn)) + pn)) + +(defun js2-parse-function-call (pn) + (let (args + (pos (js2-node-pos pn))) + (js2-consume-token) + (setq pn (make-js2-call-node :pos pos + :target pn + :lp (- js2-token-beg pos))) + (js2-node-add-children pn (js2-call-node-target pn)) + + ;; Add the arguments to pn, if any are supplied. + (setf args (nreverse (js2-parse-argument-list)) + (js2-call-node-rp pn) (- js2-token-beg pos) + (js2-call-node-args pn) args) + (apply #'js2-node-add-children pn args) + + (setf (js2-node-len pn) (- js2-ts-cursor pos)) + pn)) + +(defun js2-parse-property-access (tt pn) + "Parse a property access, XML descendants access, or XML attr access." + (let ((member-type-flags 0) + (dot-pos js2-token-beg) + (dot-len (if (= tt js2-DOTDOT) 2 1)) + name + ref ; right side of . or .. operator + result) + (js2-consume-token) + (when (= tt js2-DOTDOT) + (js2-must-have-xml) + (setq member-type-flags js2-descendants-flag)) + (if (not js2-compiler-xml-available) + (progn + (js2-must-match-prop-name "msg.no.name.after.dot") + (setq name (js2-create-name-node t js2-GETPROP) + result (make-js2-prop-get-node :left pn + :pos js2-token-beg + :right name + :len (- js2-token-end + js2-token-beg))) + (js2-node-add-children result pn name) + result) + ;; otherwise look for XML operators + (setf result (if (= tt js2-DOT) + (make-js2-prop-get-node) + (make-js2-infix-node :type js2-DOTDOT)) + (js2-node-pos result) (js2-node-pos pn) + (js2-infix-node-op-pos result) dot-pos + (js2-infix-node-left result) pn ; do this after setting position + tt (js2-next-token)) + (cond + ;; needed for generator.throw() + ((= tt js2-THROW) + (js2-save-name-token-data js2-token-beg "throw") + (setq ref (js2-parse-property-name nil js2-ts-string member-type-flags))) + + ;; handles: name, ns::name, ns::*, ns::[expr] + ((js2-valid-prop-name-token tt) + (setq ref (js2-parse-property-name -1 js2-ts-string member-type-flags))) + + ;; handles: *, *::name, *::*, *::[expr] + ((= tt js2-MUL) + (js2-save-name-token-data js2-token-beg "*") + (setq ref (js2-parse-property-name nil "*" member-type-flags))) + + ;; handles: '@attr', '@ns::attr', '@ns::*', '@ns::[expr]', etc. + ((= tt js2-XMLATTR) + (setq result (js2-parse-attribute-access))) + + (t + (js2-report-error "msg.no.name.after.dot" nil dot-pos dot-len))) + + (if ref + (setf (js2-node-len result) (- (js2-node-end ref) + (js2-node-pos result)) + (js2-infix-node-right result) ref)) + (if (js2-infix-node-p result) + (js2-node-add-children result + (js2-infix-node-left result) + (js2-infix-node-right result))) + result))) + +(defun js2-parse-attribute-access () + "Parse an E4X XML attribute expression. +This includes expressions of the forms: + + @attr @ns::attr @ns::* + @* @*::attr @*::* + @[expr] @*::[expr] @ns::[expr] + +Called if we peeked an '@' token." + (let ((tt (js2-next-token)) + (at-pos js2-token-beg)) + (cond + ;; handles: @name, @ns::name, @ns::*, @ns::[expr] + ((js2-valid-prop-name-token tt) + (js2-parse-property-name at-pos js2-ts-string 0)) + + ;; handles: @*, @*::name, @*::*, @*::[expr] + ((= tt js2-MUL) + (js2-save-name-token-data js2-token-beg "*") + (js2-parse-property-name js2-token-beg "*" 0)) + + ;; handles @[expr] + ((= tt js2-LB) + (js2-parse-xml-elem-ref at-pos)) + + (t + (js2-report-error "msg.no.name.after.xmlAttr") + ;; Avoid cascaded errors that happen if we make an error node here. + (js2-save-name-token-data js2-token-beg "") + (js2-parse-property-name js2-token-beg "" 0))))) + +(defun js2-parse-property-name (at-pos s member-type-flags) + "Check if :: follows name in which case it becomes qualified name. + +AT-POS is a natural number if we just read an '@' token, else nil. +S is the name or string that was matched: an identifier, 'throw' or '*'. +MEMBER-TYPE-FLAGS is a bit set tracking whether we're a '.' or '..' child. + +Returns a `js2-xml-ref-node' if it's an attribute access, a child of a '..' +operator, or the name is followed by ::. For a plain name, returns a +`js2-name-node'. Returns a `js2-error-node' for malformed XML expressions." + (let ((pos (or at-pos js2-token-beg)) + colon-pos + (name (js2-create-name-node t js2-current-token)) + ns + tt + ref + pn) + (catch 'return + (when (js2-match-token js2-COLONCOLON) + (setq ns name + colon-pos js2-token-beg + tt (js2-next-token)) + (cond + ;; handles name::name + ((js2-valid-prop-name-token tt) + (setq name (js2-create-name-node))) + + ;; handles name::* + ((= tt js2-MUL) + (js2-save-name-token-data js2-token-beg "*") + (setq name (js2-create-name-node))) + + ;; handles name::[expr] + ((= tt js2-LB) + (throw 'return (js2-parse-xml-elem-ref at-pos ns colon-pos))) + + (t + (js2-report-error "msg.no.name.after.coloncolon")))) + + (if (and (null ns) (zerop member-type-flags)) + name + (prog1 + (setq pn + (make-js2-xml-prop-ref-node :pos pos + :len (- (js2-node-end name) pos) + :at-pos at-pos + :colon-pos colon-pos + :propname name)) + (js2-node-add-children pn name)))))) + +(defun js2-parse-xml-elem-ref (at-pos &optional namespace colon-pos) + "Parse the [expr] portion of an xml element reference. +For instance, @[expr], @*::[expr], or ns::[expr]." + (let* ((lb js2-token-beg) + (pos (or at-pos lb)) + rb + (expr (js2-parse-expr)) + (end (js2-node-end expr)) + pn) + (if (js2-must-match js2-RB "msg.no.bracket.index") + (setq rb js2-token-beg + end js2-token-end)) + (prog1 + (setq pn + (make-js2-xml-elem-ref-node :pos pos + :len (- end pos) + :namespace namespace + :colon-pos colon-pos + :at-pos at-pos + :expr expr + :lb (js2-relpos lb pos) + :rb (js2-relpos rb pos))) + (js2-node-add-children pn namespace expr)))) + +(defun js2-parse-primary-expr () + "Parses a literal (leaf) expression of some sort. +Includes complex literals such as functions, object-literals, +array-literals, array comprehensions and regular expressions." + (let ((tt-flagged (js2-next-flagged-token)) + pn ; parent node (usually return value) + tt + px-pos ; paren-expr pos + len + flags ; regexp flags + expr) + (setq tt js2-current-token) + (cond + ((= tt js2-FUNCTION) + (js2-parse-function 'FUNCTION_EXPRESSION)) + + ((= tt js2-LB) + (js2-parse-array-literal)) + + ((= tt js2-LC) + (js2-parse-object-literal)) + + ((= tt js2-LET) + (js2-parse-let js2-token-beg)) + + ((= tt js2-LP) + (setq px-pos js2-token-beg + expr (js2-parse-expr)) + (js2-must-match js2-RP "msg.no.paren") + (setq pn (make-js2-paren-node :pos px-pos + :expr expr + :len (- js2-token-end px-pos))) + (js2-node-add-children pn (js2-paren-node-expr pn)) + pn) + + ((= tt js2-XMLATTR) + (js2-must-have-xml) + (js2-parse-attribute-access)) + + ((= tt js2-NAME) + (js2-parse-name tt-flagged tt)) + + ((= tt js2-NUMBER) + (make-js2-number-node)) + + ((= tt js2-STRING) + (prog1 + (make-js2-string-node) + (js2-record-face 'font-lock-string-face))) + + ((or (= tt js2-DIV) (= tt js2-ASSIGN_DIV)) + ;; Got / or /= which in this context means a regexp literal + (setq px-pos js2-token-beg) + (js2-read-regexp tt) + (setq flags js2-ts-regexp-flags + js2-ts-regexp-flags nil) + (prog1 + (make-js2-regexp-node :pos px-pos + :len (- js2-ts-cursor px-pos) + :value js2-ts-string + :flags flags) + (js2-set-face px-pos js2-ts-cursor 'font-lock-string-face 'record))) + + ((or (= tt js2-NULL) + (= tt js2-THIS) + (= tt js2-FALSE) + (= tt js2-TRUE)) + (make-js2-keyword-node :type tt)) + + ((= tt js2-RESERVED) + (js2-report-error "msg.reserved.id") + (make-js2-name-node)) + + ((= tt js2-ERROR) + ;; the scanner or one of its subroutines reported the error. + (make-js2-error-node)) + + ((= tt js2-EOF) + (setq px-pos (point-at-bol) + len (- js2-ts-cursor px-pos)) + (js2-report-error "msg.unexpected.eof" nil px-pos len) + (make-js2-error-node :pos px-pos :len len)) + + (t + (js2-report-error "msg.syntax") + (make-js2-error-node))))) + +(defun js2-parse-name (tt-flagged tt) + (let ((name js2-ts-string) + (name-pos js2-token-beg)) + (if (and (js2-flag-set-p tt-flagged js2-ti-check-label) + (= (js2-peek-token) js2-COLON)) + (prog1 + ;; Do not consume colon, it is used as unwind indicator + ;; to return to statementHelper. + (make-js2-label-node :pos name-pos + :len (- js2-token-end name-pos) + :name name) + (js2-set-face name-pos + js2-token-end + 'font-lock-variable-name-face 'record)) + ;; Otherwise not a label, just a name. Unfortunately peeking + ;; the next token to check for a colon has biffed js2-token-beg + ;; and js2-token-end. We store the name's bounds in buffer vars + ;; and `js2-create-name-node' uses them. + (js2-save-name-token-data name-pos name) + (if js2-compiler-xml-available + (js2-parse-property-name nil name 0) + (js2-create-name-node 'check-activation))))) + +(defsubst js2-parse-warn-trailing-comma (msg pos elems comma-pos) + (js2-add-strict-warning + msg nil + ;; back up from comma to beginning of line or array/objlit + (max (if elems + (js2-node-pos (car elems)) + pos) + (save-excursion + (goto-char comma-pos) + (back-to-indentation) + (point))) + comma-pos)) + +(defun js2-parse-array-literal () + (let ((pos js2-token-beg) + (end js2-token-end) + (after-lb-or-comma t) + after-comma + tt + elems + pn + (continue t)) + (while continue + (setq tt (js2-peek-token)) + (cond + ;; comma + ((= tt js2-COMMA) + (js2-consume-token) + (setq after-comma js2-token-end) + (if (not after-lb-or-comma) + (setq after-lb-or-comma t) + (push nil elems))) + + ;; end of array + ((or (= tt js2-RB) + (= tt js2-EOF)) ; prevent infinite loop + (if (= tt js2-EOF) + (js2-report-error "msg.no.bracket.arg" nil pos) + (js2-consume-token)) + (setq continue nil + end js2-token-end + pn (make-js2-array-node :pos pos + :len (- js2-ts-cursor pos) + :elems (nreverse elems))) + (apply #'js2-node-add-children pn (js2-array-node-elems pn)) + (when after-comma + (js2-parse-warn-trailing-comma "msg.array.trailing.comma" + pos elems after-comma))) + + ;; array comp + ((and (>= js2-language-version 170) + (= tt js2-FOR) ; check for array comprehension + (not after-lb-or-comma) ; "for" can't follow a comma + elems ; must have at least 1 element + (not (cdr elems))) ; but no 2nd element + (setf continue nil + pn (js2-parse-array-comprehension (car elems) pos))) + + ;; another element + (t + (unless after-lb-or-comma + (js2-report-error "msg.no.bracket.arg")) + (push (js2-parse-assign-expr) elems) + (setq after-lb-or-comma nil + after-comma nil)))) + pn)) + +(defun js2-parse-array-comprehension (expr pos) + "Parse a JavaScript 1.7 Array Comprehension. +EXPR is the first expression after the opening left-bracket. +POS is the beginning of the LB token preceding EXPR. +We should have just parsed the 'for' keyword before calling this function." + (let (loops + filter + if-pos + result) + (while (= (js2-peek-token) js2-FOR) + (push (js2-parse-array-comp-loop) loops)) + (when (= (js2-peek-token) js2-IF) + (js2-consume-token) + (setq if-pos (- js2-token-beg pos) ; relative + filter (js2-parse-condition))) + (js2-must-match js2-RB "msg.no.bracket.arg" pos) + (setq result (make-js2-array-comp-node :pos pos + :len (- js2-ts-cursor pos) + :result expr + :loops (nreverse loops) + :filter (car filter) + :lp (js2-relpos (second filter) pos) + :rp (js2-relpos (third filter) pos) + :if-pos if-pos)) + (apply #'js2-node-add-children result expr (car filter) + (js2-array-comp-node-loops result)) + result)) + +(defun js2-parse-array-comp-loop () + "Parse a 'for [each] (foo in bar)' expression in an Array comprehension. +Last token peeked should be the initial FOR." + (let ((pos js2-token-beg) + (pn (make-js2-array-comp-loop-node)) + tt + iter + obj + foreach-p + in-pos + each-pos + lp + rp) + (assert (= (js2-next-token) js2-FOR)) ; consumes token + (js2-push-scope pn) + (unwind-protect + (progn + (when (js2-match-token js2-NAME) + (if (string= js2-ts-string "each") + (progn + (setq foreach-p t + each-pos (- js2-token-beg pos)) ; relative + (js2-record-face 'font-lock-keyword-face)) + (js2-report-error "msg.no.paren.for"))) + + (if (js2-must-match js2-LP "msg.no.paren.for") + (setq lp (- js2-token-beg pos))) + + (setq tt (js2-peek-token)) + (cond + ((or (= tt js2-LB) + (= tt js2-LC)) + ;; handle destructuring assignment + (setq iter (js2-parse-primary-expr))) + + ((js2-valid-prop-name-token tt) + (js2-consume-token) + (setq iter (js2-create-name-node))) + + (t + (js2-report-error "msg.bad.var"))) + + ;; Define as a let since we want the scope of the variable to + ;; be restricted to the array comprehension + (if (js2-name-node-p iter) + (js2-define-symbol js2-LET (js2-name-node-name iter) pn t)) + + (if (js2-must-match js2-IN "msg.in.after.for.name") + (setq in-pos (- js2-token-beg pos))) + + (setq obj (js2-parse-expr)) + (if (js2-must-match js2-RP "msg.no.paren.for.ctrl") + (setq rp (- js2-token-beg pos))) + + (setf (js2-node-pos pn) pos + (js2-node-len pn) (- js2-ts-cursor pos) + (js2-array-comp-loop-node-iterator pn) iter + (js2-array-comp-loop-node-object pn) obj + (js2-array-comp-loop-node-in-pos pn) in-pos + (js2-array-comp-loop-node-each-pos pn) each-pos + (js2-array-comp-loop-node-foreach-p pn) foreach-p + (js2-array-comp-loop-node-lp pn) lp + (js2-array-comp-loop-node-rp pn) rp) + (js2-node-add-children pn iter obj)) + (js2-pop-scope)) + pn)) + +(defun js2-parse-object-literal () + (let ((pos js2-token-beg) + tt + elems + result + after-comma + (continue t)) + (while continue + (setq tt (js2-peek-token)) + (cond + ;; {foo: ...}, {'foo': ...}, {get foo() {...}}, or {set foo(x) {...}} + ((or (js2-valid-prop-name-token tt) + (= tt js2-STRING)) + (setq after-comma nil + result (js2-parse-named-prop tt)) + (if (and (null result) + (not js2-recover-from-parse-errors)) + (setq continue nil) + (push result elems))) + + ;; {12: x} or {10.7: x} + ((= tt js2-NUMBER) + (js2-consume-token) + (setq after-comma nil) + (push (js2-parse-plain-property (make-js2-number-node)) elems)) + + ;; trailing comma + ((= tt js2-RC) + (setq continue nil) + (if after-comma + (js2-parse-warn-trailing-comma "msg.extra.trailing.comma" + pos elems after-comma))) + (t + (js2-report-error "msg.bad.prop") + (unless js2-recover-from-parse-errors + (setq continue nil)))) ; end switch + + (if (js2-match-token js2-COMMA) + (setq after-comma js2-token-end) + (setq continue nil))) ; end loop + + (js2-must-match js2-RC "msg.no.brace.prop") + (setq result (make-js2-object-node :pos pos + :len (- js2-ts-cursor pos) + :elems (nreverse elems))) + (apply #'js2-node-add-children result (js2-object-node-elems result)) + result)) + +(defun js2-parse-named-prop (tt) + "Parse a name, string, or getter/setter object property." + (js2-consume-token) + (let ((string-prop (and (= tt js2-STRING) + (make-js2-string-node))) + expr + (ppos js2-token-beg) + (pend js2-token-end) + (name (js2-create-name-node)) + (prop js2-ts-string)) + + (if (and (= tt js2-NAME) + (= (js2-peek-token) js2-NAME) + (or (string= prop "get") + (string= prop "set"))) + (progn + ;; getter/setter prop + (js2-consume-token) + (js2-set-face ppos pend 'font-lock-keyword-face 'record) ; get/set + (js2-record-face 'font-lock-function-name-face) ; for peeked name + (setq name (js2-create-name-node)) ; discard get/set & use peeked name + (js2-parse-getter-setter-prop ppos name (string= prop "get"))) + + ;; regular prop + (prog1 + (setq expr (js2-parse-plain-property (or string-prop name))) + (js2-set-face ppos pend + (if (js2-function-node-p + (js2-object-prop-node-right expr)) + 'font-lock-function-name-face + 'font-lock-variable-name-face) + 'record))))) + +(defun js2-parse-plain-property (prop) + "Parse a non-getter/setter property in an object literal. +PROP is the node representing the property: a number, name or string." + (js2-must-match js2-COLON "msg.no.colon.prop") + (let* ((pos (js2-node-pos prop)) + (colon (- js2-token-beg pos)) + (expr (js2-parse-assign-expr)) + (result (make-js2-object-prop-node + :pos pos + ;; don't include last consumed token in length + :len (- (+ (js2-node-pos expr) + (js2-node-len expr)) + pos) + :left prop + :right expr + :op-pos colon))) + (js2-node-add-children result prop expr) + result)) + +(defun js2-parse-getter-setter-prop (pos prop get-p) + "Parse getter or setter property in an object literal. +JavaScript syntax is: + + { get foo() {...}, set foo(x) {...} } + +POS is the start position of the `get' or `set' keyword. +PROP is the `js2-name-node' representing the property name. +GET-P is non-nil if the keyword was `get'." + (let ((type (if get-p js2-GET js2-SET)) + result + end + (fn (js2-parse-function 'FUNCTION_EXPRESSION))) + + ;; it has to be an anonymous function, as we already parsed the name + (if (/= (js2-node-type fn) js2-FUNCTION) + (js2-report-error "msg.bad.prop") + (if (plusp (length (js2-function-name fn))) + (js2-report-error "msg.bad.prop"))) + + (js2-node-set-prop fn 'GETTER_SETTER type) ; for codegen + (setq end (js2-node-end fn) + result (make-js2-getter-setter-node :type type + :pos pos + :len (- end pos) + :left prop + :right fn)) + (js2-node-add-children result prop fn) + result)) + +(defun js2-create-name-node (&optional check-activation-p token) + "Create a name node using the token info from last scanned name. +In some cases we need to either synthesize a name node, or we lost +the name token information by peeking. If the TOKEN parameter is +not `js2-NAME', then we use the token info saved in instance vars." + (let ((beg js2-token-beg) + (s js2-ts-string) + name) + (when (/= js2-current-token js2-NAME) + (setq beg (or js2-prev-name-token-start js2-ts-cursor) + s js2-prev-name-token-string + js2-prev-name-token-start nil + js2-prev-name-token-string nil)) + (setq name (make-js2-name-node :pos beg + :name s + :len (length s))) + (if check-activation-p + (js2-check-activation-name s (or token js2-NAME))) + name)) + +(provide 'js2-parse) + +;;; js2-parse.el ends here +;;; js2-indent.el --- indentation for js2-mode +;; +;; Copyright (C) 2008 Steve Yegge +;; Author: Steve Yegge (steve.yegge@gmail.com) +;; Maintainer: Steve Yegge (steve.yegge@gmail.com) + +;; Commentary: +;; +;; This indenter is based on Karl Landström's "javascript.el" indenter. +;; Karl cleverly deduces that the desired indentation level is often a +;; function of paren/bracket/brace nesting depth, which can be determined +;; quickly via the built-in `parse-partial-sexp' function. His indenter +;; then does some equally clever checks to see if we're in the context of a +;; substatement of a possibly braceless statement keyword such as if, while, +;; or finally. This approach yields pretty good results. +;; +;; The indenter is often "wrong", however, and needs to be overridden. +;; The right long-term solution is probably to emulate (or modify) +;; cc-engine, but it's thousands upon thousands of lines of code. Even +;; if you were to assume the accurate parse tree from `js2-parse' is +;; present, indentation is still thousands of lines of code (I've been +;; down that path) to handle every possible syntactic edge case, and in +;; any case, relying on the parse tree is undesirable because parsing is +;; slow. So you might as well go the cc-engine approach, but it's a +;; huge pile of work that I'm just not up for any time soon. +;; +;; In the meantime, the compromise solution is that we offer a +;; "bounce indenter", configured with `js2-bounce-indent-flag', which +;; cycles the current line indent among various likely guess points. +;; This approach is far from perfect, but should at least make it +;; slightly easier to move the line towards its desired indentation +;; when manually overriding Karl's heuristic nesting guesser. +;; +;; I've made miscellaneous tweaks to Karl's code to handle some Ecma +;; extensions such as `let' and Array comprehensions, and will likely +;; make further tweaks to it, but major kudos to Karl for coming up with +;; the initial approach, which packs a lot of punch for so little code. + +;;; Code: + +(defconst js-possibly-braceless-keyword-re + (regexp-opt + '("catch" "do" "else" "finally" "for" "if" "try" "while" "with" "let") + 'words) + "Regular expression matching keywords that are optionally +followed by an opening brace.") + +(defconst js-indent-operator-re + (concat "[-+*/%<>=&^|?:.]\\([^-+*/]\\|$\\)\\|" + (regexp-opt '("in" "instanceof") 'words)) + "Regular expression matching operators that affect indentation +of continued expressions.") + +;; This function has horrible results if you're typing an array +;; such as [[1, 2], [3, 4], [5, 6]]. Bounce indenting -really- sucks +;; in conjunction with electric-indent, so just disabling it. +(defsubst js2-code-at-bol-p () + "Return t if the first character on line is non-whitespace." + nil) +;; (not (memq (char-after (point-at-bol)) +;; '(? ?\t))))) + +(defun js2-insert-and-indent (key) + "Run command bound to key and indent current line. Runs the command +bound to KEY in the global keymap and indents the current line." + (interactive (list (this-command-keys))) + (let ((cmd (lookup-key (current-global-map) key))) + (if (commandp cmd) + (call-interactively cmd))) + ;; don't do the electric keys inside comments or strings, + ;; and don't do bounce-indent with them. + (let ((parse-state (parse-partial-sexp (point-min) (point))) + (js2-bounce-indent-flag (js2-code-at-bol-p))) + (unless (or (nth 3 parse-state) + (nth 4 parse-state)) + (indent-according-to-mode)))) + +(defun js-re-search-forward-inner (regexp &optional bound count) + "Auxiliary function for `js-re-search-forward'." + (let ((parse) + (saved-point (point-min))) + (while (> count 0) + (re-search-forward regexp bound) + (setq parse (parse-partial-sexp saved-point (point))) + (cond ((nth 3 parse) + (re-search-forward + (concat "\\([^\\]\\|^\\)" (string (nth 3 parse))) + (save-excursion (end-of-line) (point)) t)) + ((nth 7 parse) + (forward-line)) + ((or (nth 4 parse) + (and (eq (char-before) ?\/) (eq (char-after) ?\*))) + (re-search-forward "\\*/")) + (t + (setq count (1- count)))) + (setq saved-point (point)))) + (point)) + +(defun js-re-search-forward (regexp &optional bound noerror count) + "Search forward but ignore strings and comments. Invokes +`re-search-forward' but treats the buffer as if strings and +comments have been removed." + (let ((saved-point (point)) + (search-expr + (cond ((null count) + '(js-re-search-forward-inner regexp bound 1)) + ((< count 0) + '(js-re-search-backward-inner regexp bound (- count))) + ((> count 0) + '(js-re-search-forward-inner regexp bound count))))) + (condition-case err + (eval search-expr) + (search-failed + (goto-char saved-point) + (unless noerror + (error (error-message-string err))))))) + +(defun js-re-search-backward-inner (regexp &optional bound count) + "Auxiliary function for `js-re-search-backward'." + (let ((parse) + (saved-point (point-min))) + (while (> count 0) + (re-search-backward regexp bound) + (setq parse (parse-partial-sexp saved-point (point))) + (cond ((nth 3 parse) + (re-search-backward + (concat "\\([^\\]\\|^\\)" (string (nth 3 parse))) + (save-excursion (beginning-of-line) (point)) t)) + ((nth 7 parse) + (goto-char (nth 8 parse))) + ((or (nth 4 parse) + (and (eq (char-before) ?/) (eq (char-after) ?*))) + (re-search-backward "/\\*")) + (t + (setq count (1- count)))))) + (point)) + +(defun js-re-search-backward (regexp &optional bound noerror count) + "Search backward but ignore strings and comments. Invokes +`re-search-backward' but treats the buffer as if strings and +comments have been removed." + (let ((saved-point (point)) + (search-expr + (cond ((null count) + '(js-re-search-backward-inner regexp bound 1)) + ((< count 0) + '(js-re-search-forward-inner regexp bound (- count))) + ((> count 0) + '(js-re-search-backward-inner regexp bound count))))) + (condition-case err + (eval search-expr) + (search-failed + (goto-char saved-point) + (unless noerror + (error (error-message-string err))))))) + +(defun js-looking-at-operator-p () + "Return non-nil if text after point is an operator (that is not +a comma)." + (save-match-data + (and (looking-at js-indent-operator-re) + (or (not (looking-at ":")) + (save-excursion + (and (js-re-search-backward "[?:{]\\|\\<case\\>" nil t) + (looking-at "?"))))))) + +(defun js-continued-expression-p () + "Returns non-nil if the current line continues an expression." + (save-excursion + (back-to-indentation) + (or (js-looking-at-operator-p) + (and (js-re-search-backward "\n" nil t) + (progn + (skip-chars-backward " \t") + (backward-char) + (and (js-looking-at-operator-p) + (and (progn (backward-char) + (not (looking-at "\\*\\|++\\|--\\|/[/*]")))))))))) + +(defun js-end-of-do-while-loop-p () + "Returns non-nil if word after point is `while' of a do-while +statement, else returns nil. A braceless do-while statement +spanning several lines requires that the start of the loop is +indented to the same column as the current line." + (interactive) + (save-excursion + (save-match-data + (when (looking-at "\\s-*\\<while\\>") + (if (save-excursion + (skip-chars-backward "[ \t\n]*}") + (looking-at "[ \t\n]*}")) + (save-excursion + (backward-list) (backward-word 1) (looking-at "\\<do\\>")) + (js-re-search-backward "\\<do\\>" (point-at-bol) t) + (or (looking-at "\\<do\\>") + (let ((saved-indent (current-indentation))) + (while (and (js-re-search-backward "^[ \t]*\\<" nil t) + (/= (current-indentation) saved-indent))) + (and (looking-at "[ \t]*\\<do\\>") + (not (js-re-search-forward + "\\<while\\>" (point-at-eol) t)) + (= (current-indentation) saved-indent))))))))) + +(defun js-ctrl-statement-indentation () + "Returns the proper indentation of the current line if it +starts the body of a control statement without braces, else +returns nil." + (let (forward-sexp-function) ; temporarily unbind it + (save-excursion + (back-to-indentation) + (when (save-excursion + (and (not (js2-same-line (point-min))) + (not (looking-at "{")) + (js-re-search-backward "[[:graph:]]" nil t) + (not (looking-at "[{([]")) + (progn + (forward-char) + ;; scan-sexps sometimes throws an error + (ignore-errors (backward-sexp)) + (when (looking-at "(") (backward-word 1)) + (and (save-excursion + (skip-chars-backward " \t}" (point-at-bol)) + (bolp)) + (looking-at js-possibly-braceless-keyword-re) + (not (js-end-of-do-while-loop-p)))))) + (save-excursion + (goto-char (match-beginning 0)) + (+ (current-indentation) js2-basic-offset)))))) + +(defun js2-indent-in-array-comp (parse-status) + "Return non-nil if we think we're in an array comprehension. +In particular, return the buffer position of the first `for' kwd." + (let ((end (point))) + (when (nth 1 parse-status) + (save-excursion + (goto-char (nth 1 parse-status)) + (when (looking-at "\\[") + (forward-char 1) + (js2-forward-sws) + (if (looking-at "[[{]") + (let (forward-sexp-function) ; use lisp version + (forward-sexp) ; skip destructuring form + (js2-forward-sws) + (if (and (/= (char-after) ?,) ; regular array + (looking-at "for")) + (match-beginning 0))) + ;; to skip arbitrary expressions we need the parser, + ;; so we'll just guess at it. + (if (re-search-forward "[^,]* \\(for\\) " end t) + (match-beginning 1)))))))) + +(defun js2-array-comp-indentation (parse-status for-kwd) + (if (js2-same-line for-kwd) + ;; first continuation line + (save-excursion + (goto-char (nth 1 parse-status)) + (forward-char 1) + (skip-chars-forward " \t") + (current-column)) + (save-excursion + (goto-char for-kwd) + (current-column)))) + +(defun js-proper-indentation (parse-status) + "Return the proper indentation for the current line." + (save-excursion + (back-to-indentation) + (let ((ctrl-stmt-indent (js-ctrl-statement-indentation)) + (same-indent-p (looking-at "[]})]\\|\\<case\\>\\|\\<default\\>")) + (continued-expr-p (js-continued-expression-p)) + (bracket (nth 1 parse-status)) + beg) + (cond + ;; indent array comprehension continuation lines specially + ((and bracket + (not (js2-same-line bracket)) + (setq beg (js2-indent-in-array-comp parse-status)) + (>= (point) (save-excursion + (goto-char beg) + (point-at-bol)))) ; at or after first loop? + (js2-array-comp-indentation parse-status beg)) + + (ctrl-stmt-indent) + + (bracket + (goto-char bracket) + (cond + ((looking-at "[({[][ \t]*\\(/[/*]\\|$\\)") + (let ((p (parse-partial-sexp (point-at-bol) (point)))) + (when (save-excursion (skip-chars-backward " \t)") + (looking-at ")")) + (backward-list)) + (if (nth 1 p) + (progn (goto-char (1+ (nth 1 p))) + (skip-chars-forward " \t")) + (back-to-indentation)) + (cond (same-indent-p + (current-column)) + (continued-expr-p + (+ (current-column) (* 2 js2-basic-offset))) + (t + (+ (current-column) js2-basic-offset))))) + (t + (unless same-indent-p + (forward-char) + (skip-chars-forward " \t")) + (current-column)))) + + (continued-expr-p js2-basic-offset) + (t 0))))) + +(defun js2-lineup-comment (parse-status) + "Indent a multi-line block comment continuation line." + (let* ((beg (nth 8 parse-status)) + (first-line (js2-same-line beg)) + (offset (save-excursion + (goto-char beg) + (if (looking-at "/\\*") + (+ 1 (current-column)) + 0)))) + (unless first-line + (indent-line-to offset)))) + +(defun js2-backward-sws () + "Move backward through whitespace and comments." + (interactive) + (while (forward-comment -1))) + +(defun js2-forward-sws () + "Move forward through whitespace and comments." + (interactive) + (while (forward-comment 1))) + +(defsubst js2-current-indent (&optional pos) + "Return column of indentation on current line. +If POS is non-nil, go to that point and return indentation for that line." + (save-excursion + (if pos + (goto-char pos)) + (back-to-indentation) + (current-column))) + +(defsubst js2-arglist-close () + "Return non-nil if we're on a line beginning with a close-paren/brace." + (save-match-data + (save-excursion + (goto-char (point-at-bol)) + (js2-forward-sws) + (looking-at "[])}]")))) + +(defsubst js2-indent-looks-like-label-p () + (goto-char (point-at-bol)) + (js2-forward-sws) + (looking-at (concat js2-mode-identifier-re ":"))) + +(defun js2-indent-in-objlit-p (parse-status) + "Return non-nil if this looks like an object-literal entry." + (let ((start (nth 1 parse-status))) + (and + start + (save-excursion + (and (zerop (forward-line -1)) + (not (< (point) start)) ; crossed a {} boundary + (js2-indent-looks-like-label-p))) + (save-excursion + (js2-indent-looks-like-label-p))))) + +;; if prev line looks like foobar({ then we're passing an object +;; literal to a function call, and people pretty much always want to +;; de-dent back to the previous line, so move the 'basic-offset' +;; position to the front. +(defsubst js2-indent-objlit-arg-p (parse-status) + (save-excursion + (back-to-indentation) + (js2-backward-sws) + (and (eq (1- (point)) (nth 1 parse-status)) + (eq (char-before) ?{) + (progn + (forward-char -1) + (skip-chars-backward " \t") + (eq (char-before) ?\())))) + +(defsubst js2-indent-case-block-p () + (save-excursion + (back-to-indentation) + (js2-backward-sws) + (goto-char (point-at-bol)) + (skip-chars-forward " \t") + (save-match-data + (looking-at "case\\s-.+:")))) + +(defsubst js2-syntax-bol () + "Return the point at the first non-whitespace char on the line. +Returns `point-at-bol' if the line is empty." + (save-excursion + (beginning-of-line) + (skip-chars-forward " \t") + (point))) + +(defun js2-bounce-indent (normal-col parse-status) + "Cycle among alternate computed indentation positions. +PARSE-STATUS is the result of `parse-partial-sexp' from the beginning +of the buffer to the current point. NORMAL-COL is the indentation +column computed by the heuristic guesser based on current paren, +bracket, brace and statement nesting." + (let ((cur-indent (js2-current-indent)) + (old-buffer-undo-list buffer-undo-list) + ;; Emacs 21 only has `count-lines', not `line-number-at-pos' + (current-line (save-excursion + (forward-line 0) ; move to bol + (1+ (count-lines (point-min) (point))))) + positions + pos + anchor + arglist-cont + same-indent + prev-line-col + basic-offset + computed-pos) + ;; temporarily don't record undo info, if user requested this + (if js2-mode-indent-inhibit-undo + (setq buffer-undo-list t)) + (unwind-protect + (progn + ;; first likely point: indent from beginning of previous code line + (push (setq basic-offset + (+ (save-excursion + (back-to-indentation) + (js2-backward-sws) + (back-to-indentation) + (setq prev-line-col (current-column))) + js2-basic-offset)) + positions) + + ;; second likely point: indent from assign-expr RHS. This + ;; is just a crude guess based on finding " = " on the previous + ;; line containing actual code. + (setq pos (save-excursion + (save-match-data + (forward-line -1) + (goto-char (point-at-bol)) + (when (re-search-forward "\\s-+\\(=\\)\\s-+" + (point-at-eol) t) + (goto-char (match-end 1)) + (skip-chars-forward " \t\r\n") + (current-column))))) + (when pos + (incf pos js2-basic-offset) + (unless (member pos positions) + (push pos positions))) + + ;; third likely point: same indent as previous line of code. + ;; Make it the first likely point if we're not on an + ;; arglist-close line and previous line ends in a comma, or + ;; both this line and prev line look like object-literal + ;; elements. + (setq pos (save-excursion + (goto-char (point-at-bol)) + (js2-backward-sws) + (back-to-indentation) + (prog1 + (current-column) + ;; while we're here, look for trailing comma + (if (save-excursion + (goto-char (point-at-eol)) + (js2-backward-sws) + (eq (char-before) ?,)) + (setq arglist-cont (1- (point))))))) + (when pos + (if (and (or arglist-cont + (js2-indent-in-objlit-p parse-status)) + (not (js2-arglist-close))) + (setq same-indent pos)) + (unless (member pos positions) + (push pos positions))) + + ;; fourth likely position: first preceding code with less indentation + ;; than the immediately preceding code line. + (setq pos (save-excursion + (js2-backward-sws) + (back-to-indentation) + (setq anchor (current-column)) + (while (and (zerop (forward-line -1)) + (>= (progn + (back-to-indentation) + (current-column)) + anchor))) + (setq pos (current-column)))) + (unless (member pos positions) + (push pos positions)) + + ;; put nesting-heuristic position first in list, sort rest + (setq positions (nreverse (sort positions '<))) + (setq positions (cons normal-col (delete normal-col positions))) + + ;; comma-list continuation lines: prev line indent takes precedence + (if same-indent + (setq positions + (cons same-indent + (sort (delete same-indent positions) '<)))) + + ;; common special cases where we want to indent in from previous line + (if (or (js2-indent-case-block-p) + (js2-indent-objlit-arg-p parse-status)) + (setq positions + (cons basic-offset + (delete basic-offset positions)))) + + ;; record whether we're already sitting on one of the alternatives + (setq pos (member cur-indent positions)) + (cond + ;; case 0: we're one one of the alternatives and this is the + ;; first time they've pressed TAB on this line (best-guess). + ((and js2-mode-indent-ignore-first-tab + pos + ;; first time pressing TAB on this line? + (not (eq js2-mode-last-indented-line current-line))) + ;; do nothing + (setq computed-pos nil)) + ;; case 1: only one computed position => use it + ((null (cdr positions)) + (setq computed-pos 0)) + ;; case 2: not on any of the computed spots => use main spot + ((not pos) + (setq computed-pos 0)) + ;; case 3: on last position: cycle to first position + ((null (cdr pos)) + (setq computed-pos 0)) + ;; case 4: on intermediate position: cycle to next position + (t + (setq computed-pos (js2-position (second pos) positions)))) + + ;; see if any hooks want to indent; otherwise we do it + (loop with result = nil + for hook in js2-indent-hook + while (null result) + do + (setq result (funcall hook positions computed-pos)) + finally do + (unless (or result (null computed-pos)) + (indent-line-to (nth computed-pos positions))))) + + ;; finally + (if js2-mode-indent-inhibit-undo + (setq buffer-undo-list old-buffer-undo-list)) + ;; see commentary for `js2-mode-last-indented-line' + (setq js2-mode-last-indented-line current-line)))) + +(defsubst js2-1-line-comment-continuation-p () + "Return t if we're in a 1-line comment continuation. +If so, we don't ever want to use bounce-indent." + (save-excursion + (save-match-data + (and (progn + (forward-line 0) + (looking-at "\\s-*//")) + (progn + (forward-line -1) + (forward-line 0) + (when (looking-at "\\s-*$") + (js2-backward-sws) + (forward-line 0)) + (looking-at "\\s-*//")))))) + +(defun js2-indent-line () + "Indent the current line as JavaScript source text." + (interactive) + (let (parse-status + current-indent + offset + indent-col + moved + ;; don't whine about errors/warnings when we're indenting. + ;; This has to be set before calling parse-partial-sexp below. + (inhibit-point-motion-hooks t)) + (setq parse-status (save-excursion + (parse-partial-sexp (point-min) + (point-at-bol))) + offset (- (point) (save-excursion + (back-to-indentation) + (setq current-indent (current-column)) + (point)))) + (js2-with-underscore-as-word-syntax + (if (nth 4 parse-status) + (js2-lineup-comment parse-status) + (setq indent-col (js-proper-indentation parse-status)) + ;; see comments below about js2-mode-last-indented-line + (when + (cond + ;; bounce-indenting is disabled during electric-key indent. + ;; It doesn't work well on first line of buffer. + ((and js2-bounce-indent-flag + (not (js2-same-line (point-min))) + (not (js2-1-line-comment-continuation-p))) + (js2-bounce-indent indent-col parse-status) + (setq moved t)) + ;; just indent to the guesser's likely spot + ((/= current-indent indent-col) + (indent-line-to indent-col) + (setq moved t))) + (when (and moved (plusp offset)) + (forward-char offset))))))) + +(defun js2-indent-region (start end) + "Indent the region, but don't use bounce indenting." + (let ((js2-bounce-indent-flag nil) + (indent-region-function nil)) + (indent-region start end nil))) ; nil for byte-compiler + +(provide 'js2-indent) + +;;; js2-indent.el ends here + +(eval-when-compile + (require 'cl)) + +(require 'imenu) +(require 'cc-cmds) ; for `c-fill-paragraph' + + +;;;###autoload (add-to-list 'auto-mode-alist '("\\.js$" . js2-mode)) + +;;;###autoload +(defun js2-mode () + "Major mode for editing JavaScript code." + (interactive) + (js2-mode-check-compat) + (kill-all-local-variables) + (set-syntax-table js2-mode-syntax-table) + (use-local-map js2-mode-map) + (setq major-mode 'js2-mode + mode-name "JavaScript-IDE" + comment-start "//" ; used by comment-region; don't change it + comment-end "") + (setq local-abbrev-table js2-mode-abbrev-table) + (set (make-local-variable 'max-lisp-eval-depth) + (max max-lisp-eval-depth 3000)) + (set (make-local-variable 'indent-line-function) #'js2-indent-line) + (set (make-local-variable 'indent-region-function) #'js2-indent-region) + (set (make-local-variable 'fill-paragraph-function) #'js2-fill-paragraph) + (set (make-local-variable 'before-save-hook) #'js2-before-save) + (set (make-local-variable 'next-error-function) #'js2-next-error) + (set (make-local-variable 'beginning-of-defun-function) #'js2-beginning-of-defun) + (set (make-local-variable 'end-of-defun-function) #'js2-end-of-defun) + ;; We un-confuse `parse-partial-sexp' by setting syntax-table properties + ;; for characters inside regexp literals. + (set (make-local-variable 'parse-sexp-lookup-properties) t) + ;; this is necessary to make `show-paren-function' work properly + (set (make-local-variable 'parse-sexp-ignore-comments) t) + ;; needed for M-x rgrep, among other things + (put 'js2-mode 'find-tag-default-function #'js2-mode-find-tag) + + ;; some variables needed by cc-engine for paragraph-fill, etc. + (setq c-buffer-is-cc-mode t + c-comment-prefix-regexp js2-comment-prefix-regexp + c-paragraph-start js2-paragraph-start + c-paragraph-separate "$" + comment-start-skip js2-comment-start-skip + c-syntactic-ws-start js2-syntactic-ws-start + c-syntactic-ws-end js2-syntactic-ws-end + c-syntactic-eol js2-syntactic-eol) + (if js2-emacs22 + (c-setup-paragraph-variables)) + + ;; We do our own syntax highlighting based on the parse tree. + ;; However, we want minor modes that add keywords to highlight properly + ;; (examples: doxymacs, column-marker). We do this by not letting + ;; font-lock unfontify anything, and telling it to fontify after we + ;; re-parse and re-highlight the buffer. (We currently don't do any + ;; work with regions other than the whole buffer.) + (dolist (var '(font-lock-unfontify-buffer-function + font-lock-unfontify-region-function)) + (set (make-local-variable var) (lambda (&rest args) t))) + + ;; Don't let font-lock do syntactic (string/comment) fontification. + (set (make-local-variable #'font-lock-syntactic-face-function) + (lambda (state) nil)) + + ;; Experiment: make reparse-delay longer for longer files. + (if (plusp js2-dynamic-idle-timer-adjust) + (setq js2-idle-timer-delay + (* js2-idle-timer-delay + (/ (point-max) js2-dynamic-idle-timer-adjust)))) + + (add-hook 'change-major-mode-hook #'js2-mode-exit nil t) + (add-hook 'after-change-functions #'js2-mode-edit nil t) + (setq imenu-create-index-function #'js2-mode-create-imenu-index) + (imenu-add-to-menubar (concat "IM-" mode-name)) + (when js2-mirror-mode + (js2-enter-mirror-mode)) + (add-to-invisibility-spec '(js2-outline . t)) + (set (make-local-variable 'line-move-ignore-invisible) t) + (set (make-local-variable 'forward-sexp-function) #'js2-mode-forward-sexp) + (setq js2-mode-functions-hidden nil + js2-mode-comments-hidden nil + js2-mode-buffer-dirty-p t + js2-mode-parsing nil) + (js2-reparse) + (run-hooks 'js2-mode-hook)) + +(defun js2-mode-check-compat () + "Signal an error if we can't run with this version of Emacs." + (if (and js2-mode-must-byte-compile + (not (byte-code-function-p (symbol-function 'js2-mode)))) + (error "You must byte-compile js2-mode before using it.")) + (if (and (boundp 'running-xemacs) + running-xemacs) + (error "js2-mode is not compatible with XEmacs")) + (unless (>= emacs-major-version 21) + (error "js2-mode requires GNU Emacs version 21 or higher"))) + +(defun js2-mode-exit () + (interactive) + (when js2-mode-node-overlay + (delete-overlay js2-mode-node-overlay) + (setq js2-mode-node-overlay nil)) + (js2-remove-overlays) + (setq js2-mode-ast nil) + (remove-hook 'change-major-mode-hook #'js2-mode-exit t) + (remove-from-invisibility-spec '(js2-outline . t)) + (js2-mode-show-all) + (js2-with-unmodifying-text-property-changes + (js2-clear-face (point-min) (point-max)))) + +(defun js2-before-save () + "Clean up whitespace before saving file. +You can disable this by customizing `js2-cleanup-whitespace'." + (when js2-cleanup-whitespace + (let ((col (current-column))) + (delete-trailing-whitespace) + ;; don't change trailing whitespace on current line + (unless (eq (current-column) col) + (indent-to col))))) + +(defsubst js2-mode-reset-timer () + (if js2-mode-parse-timer + (cancel-timer js2-mode-parse-timer)) + (setq js2-mode-parsing nil) + (setq js2-mode-parse-timer + (run-with-idle-timer js2-idle-timer-delay nil #'js2-reparse))) + +(defun js2-mode-edit (beg end len) + "Schedule a new parse after buffer is edited." + (setq js2-mode-buffer-dirty-p t) + (js2-mode-hide-overlay) + (js2-mode-reset-timer)) + +(defun js2-mode-run-font-lock () + "Run `font-lock-fontify-buffer' after parsing/highlighting. +This is intended to allow modes that install their own font-lock keywords +to work with js2-mode. In practice it never seems to work for long. +Hopefully the Emacs maintainers can help figure out a way to make it work." + (when (and (boundp 'font-lock-keywords) + font-lock-keywords + (boundp 'font-lock-mode) + font-lock-mode) + ;; TODO: font-lock and jit-lock really really REALLY don't want to + ;; play nicely with js2-mode. They go out of their way to fail to + ;; provide any option for saying "look, fontify the goddamn buffer + ;; with just the keywords already". Argh. + (setq font-lock-defaults (list font-lock-keywords 'keywords-only)) + (let (font-lock-verbose) + (font-lock-default-fontify-buffer)))) + +(defun js2-reparse (&optional force) + "Re-parse current buffer after user finishes some data entry. +If we get any user input while parsing, including cursor motion, +we discard the parse and reschedule it. If FORCE is nil, then the +buffer will only rebuild its `js2-mode-ast' if the buffer is dirty." + (let (time + interrupted-p + (js2-compiler-strict-mode js2-mode-show-strict-warnings)) + (unless js2-mode-parsing + (setq js2-mode-parsing t) + (unwind-protect + (when (or js2-mode-buffer-dirty-p force) + (js2-remove-overlays) + (js2-with-unmodifying-text-property-changes + (setq js2-mode-buffer-dirty-p nil + js2-mode-fontifications nil + js2-mode-deferred-properties nil) + (if js2-mode-verbose-parse-p + (message "parsing...")) + (setq time + (js2-time + (setq interrupted-p + (catch 'interrupted + (setq js2-mode-ast (js2-parse)) + (js2-mode-fontify-regions) + (js2-mode-remove-suppressed-warnings) + (js2-mode-show-warnings) + (js2-mode-show-errors) + (js2-mode-run-font-lock) ; note: doesn't work + (if (>= js2-highlight-level 1) + (js2-highlight-jsdoc js2-mode-ast)) + nil)))) + (if interrupted-p + (progn + ;; unfinished parse => try again + (setq js2-mode-buffer-dirty-p t) + (js2-mode-reset-timer)) + (if js2-mode-verbose-parse-p + (message "Parse time: %s" time))))) + ;; finally + (setq js2-mode-parsing nil) + (unless interrupted-p + (setq js2-mode-parse-timer nil)))))) + +(defun js2-mode-show-node () + "Debugging aid: highlight selected AST node on mouse click." + (interactive) + (let ((node (js2-node-at-point)) + beg + end) + (when js2-mode-show-overlay + (if (null node) + (message "No node found at location %s" (point)) + (setq beg (js2-node-abs-pos node) + end (+ beg (js2-node-len node))) + (if js2-mode-node-overlay + (move-overlay js2-mode-node-overlay beg end) + (setq js2-mode-node-overlay (make-overlay beg end)) + (overlay-put js2-mode-node-overlay 'face 'highlight)) + (js2-with-unmodifying-text-property-changes + (put-text-property beg end 'point-left #'js2-mode-hide-overlay)) + (message "%s, parent: %s" + (js2-node-short-name node) + (if (js2-node-parent node) + (js2-node-short-name (js2-node-parent node)) + "nil")))))) + +(defun js2-mode-hide-overlay (&optional p1 p2) + "Remove the debugging overlay when the point moves." + (when js2-mode-node-overlay + (let ((beg (overlay-start js2-mode-node-overlay)) + (end (overlay-end js2-mode-node-overlay))) + ;; Sometimes we're called spuriously. + (unless (and p2 + (>= p2 beg) + (<= p2 end)) + (js2-with-unmodifying-text-property-changes + (remove-text-properties beg end '(point-left nil))) + (delete-overlay js2-mode-node-overlay) + (setq js2-mode-node-overlay nil))))) + +(defun js2-mode-reset () + "Debugging helper; resets everything." + (interactive) + (js2-mode-exit) + (js2-mode)) + +(defsubst js2-mode-show-warn-or-err (e face) + "Highlight a warning or error E with FACE. +E is a list of ((MSG-KEY MSG-ARG) BEG END)." + (let* ((key (first e)) + (beg (second e)) + (end (+ beg (third e))) + ;; Don't inadvertently go out of bounds. + (beg (max (point-min) (min beg (point-max)))) + (end (max (point-min) (min end (point-max)))) + (js2-highlight-level 3) ; so js2-set-face is sure to fire + (ovl (make-overlay beg end))) + (overlay-put ovl 'face face) + (overlay-put ovl 'js2 t) + (put-text-property beg end 'help-echo (js2-get-msg key)) + (put-text-property beg end 'point-entered #'js2-echo-error))) + +(defun js2-remove-overlays () + "Remove overlays from buffer that have a `js2' property." + (let ((beg (point-min)) + (end (point-max))) + (save-excursion + (dolist (o (overlays-in beg end)) + (when (overlay-get o 'js2) + (delete-overlay o)))))) + +(defun js2-mode-fontify-regions () + "Apply fontifications recorded during parsing." + ;; We defer clearing faces as long as possible to eliminate flashing. + (js2-clear-face (point-min) (point-max)) + ;; have to reverse the recorded fontifications so that errors and + ;; warnings overwrite the normal fontifications + (dolist (f (nreverse js2-mode-fontifications)) + (put-text-property (first f) (second f) 'face (third f))) + (setq js2-mode-fontifications nil) + (dolist (p js2-mode-deferred-properties) + (apply #'put-text-property p)) + (setq js2-mode-deferred-properties nil)) + +(defun js2-mode-show-errors () + "Highlight syntax errors." + (when js2-mode-show-parse-errors + (dolist (e (js2-ast-root-errors js2-mode-ast)) + (js2-mode-show-warn-or-err e 'js2-error-face)))) + +(defun js2-mode-remove-suppressed-warnings () + "Take suppressed warnings out of the AST warnings list. +This ensures that the counts and `next-error' are correct." + (setf (js2-ast-root-warnings js2-mode-ast) + (js2-delete-if + (lambda (e) + (let ((key (caar e))) + (or + (and (not js2-strict-trailing-comma-warning) + (string-match "trailing\\.comma" key)) + (and (not js2-strict-cond-assign-warning) + (string= key "msg.equal.as.assign")) + (and js2-missing-semi-one-line-override + (string= key "msg.missing.semi") + (let* ((beg (second e)) + (node (js2-node-at-point beg)) + (fn (js2-mode-find-parent-fn node)) + (body (and fn (js2-function-node-body fn))) + (lc (and body (js2-node-abs-pos body))) + (rc (and lc (+ lc (js2-node-len body))))) + (and fn + (or (null body) + (save-excursion + (goto-char beg) + (and (js2-same-line lc) + (js2-same-line rc)))))))))) + (js2-ast-root-warnings js2-mode-ast)))) + +(defun js2-mode-show-warnings () + "Highlight strict-mode warnings." + (when js2-mode-show-strict-warnings + (dolist (e (js2-ast-root-warnings js2-mode-ast)) + (js2-mode-show-warn-or-err e 'js2-warning-face)))) + +(defun js2-echo-error (old-point new-point) + "Called by point-motion hooks." + (let ((msg (get-text-property new-point 'help-echo))) + (if msg + (message msg)))) + +(defalias #'js2-echo-help #'js2-echo-error) + +(defun js2-enter-key () + "Handle user pressing the Enter key." + (interactive) + (let ((parse-status (save-excursion + (parse-partial-sexp (point-min) (point))))) + (cond + ;; check if we're inside a string + ((nth 3 parse-status) + (js2-mode-split-string parse-status)) + ;; check if inside a block comment + ((nth 4 parse-status) + (js2-mode-extend-comment)) + (t + ;; should probably figure out what the mode-map says we should do + (if js2-indent-on-enter-key + (let ((js2-bounce-indent-flag nil)) + (js2-indent-line))) + (insert "\n") + (if js2-enter-indents-newline + (let ((js2-bounce-indent-flag nil)) + (js2-indent-line))))))) + +(defun js2-mode-split-string (parse-status) + "Turn a newline in mid-string into a string concatenation." + (let* ((col (current-column)) + (quote-char (nth 3 parse-status)) + (quote-string (string quote-char)) + (string-beg (nth 8 parse-status)) + (indent (save-match-data + (or + (save-excursion + (back-to-indentation) + (if (looking-at "\\+") + (current-column))) + (save-excursion + (goto-char string-beg) + (if (looking-back "\\+\\s-+") + (goto-char (match-beginning 0))) + (current-column)))))) + (insert quote-char "\n") + (indent-to indent) + (insert "+ " quote-string) + (when (eolp) + (insert quote-string) + (backward-char 1)))) + +(defun js2-mode-extend-comment () + "When inside a comment block, add comment prefix." + (let (star single col first-line needs-close) + (save-excursion + (back-to-indentation) + (cond + ((looking-at "\\*[^/]") + (setq star t + col (current-column))) + ((looking-at "/\\*") + (setq star t + first-line t + col (1+ (current-column)))) + ((looking-at "//") + (setq single t + col (current-column))))) + ;; Heuristic for whether we need to close the comment: + ;; if we've got a parse error here, assume it's an unterminated + ;; comment. + (setq needs-close + (or + (eq (get-text-property (1- (point)) 'point-entered) + 'js2-echo-error) + ;; The heuristic above doesn't work well when we're + ;; creating a comment and there's another one downstream, + ;; as our parser thinks this one ends at the end of the + ;; next one. (You can have a /* inside a js block comment.) + ;; So just close it if the next non-ws char isn't a *. + (and first-line + (eolp) + (save-excursion + (skip-syntax-forward " ") + (not (eq (char-after) ?*)))))) + (insert "\n") + (cond + (star + (indent-to col) + (insert "* ") + (if (and first-line needs-close) + (save-excursion + (insert "\n") + (indent-to col) + (insert "*/")))) + (single + (when (save-excursion + (and (zerop (forward-line 1)) + (looking-at "\\s-*//"))) + (indent-to col) + (insert "// ")))))) + +(defun js2-fill-string (beg quote) + "Line-wrap a single-line string into a multi-line string. +BEG is the string beginning, QUOTE is the quote char." + (let* ((squote (string quote)) + (end (if (re-search-forward (concat "[^\\]" squote) + (point-at-eol) t) + (1+ (match-beginning 0)) + (point-at-eol))) + (tag (make-marker)) + (fill-column (- fill-column 4))) ; make room + (unwind-protect + (progn + (move-marker tag end) + (fill-paragraph nil) + (goto-char beg) + (while (not (js2-same-line tag)) + (goto-char (point-at-eol)) + (insert squote) + (when (zerop (forward-line 1)) + (back-to-indentation) + (if (looking-at (concat squote "\\s-*$")) + (progn + (setq end (point-at-eol)) + (forward-line -1) + (delete-region (point-at-eol) end)) + (insert "+ " squote))))) + (move-marker tag nil)))) + +(defun js2-fill-paragraph (arg) + "Fill paragraph after point. Prefix ARG means justify as well. +Has special handling for filling in comments and strings." + (let* ((parse-status (save-excursion + (parse-partial-sexp (point-min) (point)))) + (quote-char (or (nth 3 parse-status) + (save-match-data + (if (looking-at "[\"\']") + (char-after)))))) + (cond + (quote-char + (js2-fill-string (or (nth 8 parse-status) + (point)) + quote-char) + t) ; or fill-paragraph does evil things afterwards + ((nth 4 parse-status) ; in block comment? + (js2-fill-comment parse-status arg)) + (t + (fill-paragraph arg))))) + +(defun js2-fill-comment (parse-status arg) + "Fill-paragraph in a block comment." + (let* ((beg (nth 8 parse-status)) + (end (save-excursion + (goto-char beg) + (re-search-forward "[^\\]\\*/" nil t))) + indent + end-marker) + (when end + (setq end-marker (make-marker)) + (move-marker end-marker end)) + (when (and end js2-mode-squeeze-spaces) + (save-excursion + (save-restriction + (narrow-to-region beg end) + (goto-char (point-min)) + (while (re-search-forward "[ \t][ \t]+" nil t) + (replace-match " "))))) + ;; `c-fill-paragraph' doesn't indent the continuation stars properly + ;; if the comment isn't left-justified. They align to the first star + ;; on the first continuation line after the comment-open, so we make + ;; sure the first continuation line has the proper indentation. + (save-excursion + (goto-char beg) + (setq indent (1+ (current-column))) + (goto-char (point-at-eol)) + (skip-chars-forward " \t\r\n") + (indent-line-to indent) + + ;; Invoke `c-fill-paragraph' from the first continuation line, + ;; since it provides better results. Otherwise if you're on the + ;; last line, it doesn't prefix with stars the way you'd expect. + ;; TODO: write our own fill function that works in Emacs 21 + (c-fill-paragraph arg)) + + ;; last line is typically indented wrong, so fix it + (when end-marker + (save-excursion + (goto-char end-marker) + (js2-indent-line))))) + +(defun js2-beginning-of-line () + "Toggles point between bol and first non-whitespace char in line. +Also moves past comment delimiters when inside comments." + (interactive) + (let (node beg) + (cond + ((bolp) + (back-to-indentation)) + ((looking-at "//") + (skip-chars-forward "/ \t")) + ((and (eq (char-after) ?*) + (setq node (js2-comment-at-point)) + (memq (js2-comment-node-format node) '(jsdoc block)) + (save-excursion + (skip-chars-backward " \t") + (bolp))) + (skip-chars-forward "\* \t")) + (t + (goto-char (point-at-bol)))))) + +(defun js2-end-of-line () + "Toggles point between eol and last non-whitespace char in line." + (interactive) + (if (eolp) + (skip-chars-backward " \t") + (goto-char (point-at-eol)))) + +(defun js2-enter-mirror-mode() + "Turns on mirror mode, where quotes, brackets etc are mirrored automatically + on insertion." + (interactive) + (define-key js2-mode-map (read-kbd-macro "{") 'js2-mode-match-curly) + (define-key js2-mode-map (read-kbd-macro "}") 'js2-mode-magic-close-paren) + (define-key js2-mode-map (read-kbd-macro "\"") 'js2-mode-match-double-quote) + (define-key js2-mode-map (read-kbd-macro "'") 'js2-mode-match-single-quote) + (define-key js2-mode-map (read-kbd-macro "(") 'js2-mode-match-paren) + (define-key js2-mode-map (read-kbd-macro ")") 'js2-mode-magic-close-paren) + (define-key js2-mode-map (read-kbd-macro "[") 'js2-mode-match-bracket) + (define-key js2-mode-map (read-kbd-macro "]") 'js2-mode-magic-close-paren)) + +(defun js2-leave-mirror-mode() + "Turns off mirror mode." + (interactive) + (dolist (key '("{" "\"" "'" "(" ")" "[" "]")) + (define-key js2-mode-map (read-kbd-macro key) 'self-insert-command))) + +(defsubst js2-mode-inside-string () + "Return non-nil if inside a string. +Actually returns the quote character that begins the string." + (let ((parse-state (save-excursion + (parse-partial-sexp (point-min) (point))))) + (nth 3 parse-state))) + +(defsubst js2-mode-inside-comment-or-string () + "Return non-nil if inside a comment or string." + (or + (let ((comment-start + (save-excursion + (goto-char (point-at-bol)) + (if (re-search-forward "//" (point-at-eol) t) + (match-beginning 0))))) + (and comment-start + (<= comment-start (point)))) + (let ((parse-state (save-excursion + (parse-partial-sexp (point-min) (point))))) + (or (nth 3 parse-state) + (nth 4 parse-state))))) + +(defun js2-mode-match-curly (arg) + "Insert matching curly-brace." + (interactive "p") + (insert "{") + (if current-prefix-arg + (save-excursion + (insert "}")) + (unless (or (not (looking-at "\\s-*$")) + (js2-mode-inside-comment-or-string)) + (undo-boundary) + + ;; absolutely mystifying bug: when inserting the next "\n", + ;; the buffer-undo-list is given two new entries: the inserted range, + ;; and the incorrect position of the point. It's recorded incorrectly + ;; as being before the opening "{", not after it. But it's recorded + ;; as the correct value if you're debugging `js2-mode-match-curly' + ;; in edebug. I have no idea why it's doing this, but incrementing + ;; the inserted position fixes the problem, so that the undo takes us + ;; back to just after the user-inserted "{". + (insert "\n") + (ignore-errors + (incf (cadr buffer-undo-list))) + + (js2-indent-line) + (save-excursion + (insert "\n}") + (let ((js2-bounce-indent-flag (js2-code-at-bol-p))) + (js2-indent-line)))))) + +(defun js2-mode-match-bracket () + "Insert matching bracket." + (interactive) + (insert "[") + (unless (or (not (looking-at "\\s-*$")) + (js2-mode-inside-comment-or-string)) + (save-excursion + (insert "]")) + (when js2-auto-indent-flag + (let ((js2-bounce-indent-flag (js2-code-at-bol-p))) + (js2-indent-line))))) + +(defun js2-mode-match-paren () + "Insert matching paren unless already inserted." + (interactive) + (insert "(") + (unless (or (not (looking-at "\\s-*$")) + (js2-mode-inside-comment-or-string)) + (save-excursion + (insert ")")) + (when js2-auto-indent-flag + (let ((js2-bounce-indent-flag (js2-code-at-bol-p))) + (js2-indent-line))))) + +(defsubst js2-match-quote (quote-string) + (let ((start-quote (js2-mode-inside-string))) + (cond + ;; inside a comment - don't do quote-matching, since we can't + ;; reliably figure out if we're in a string inside the comment + ((js2-comment-at-point) + (insert quote-string)) + ((not start-quote) + ;; not in string => insert matched quotes + (insert quote-string) + ;; exception: if we're just before a word, don't double it. + (unless (looking-at "[^ \t\r\n]") + (save-excursion + (insert quote-string)))) + ((looking-at quote-string) + (if (looking-back "[^\\]\\\\") + (insert quote-string) + (forward-char 1))) + ((and js2-mode-escape-quotes + (save-excursion + (save-match-data + (re-search-forward quote-string (point-at-eol) t)))) + ;; inside terminated string, escape quote (unless already escaped) + (insert (if (looking-back "[^\\]\\\\") + quote-string + (concat "\\" quote-string)))) + (t + (insert quote-string))))) ; else terminate the string + +(defun js2-mode-match-single-quote () + "Insert matching single-quote." + (interactive) + (let ((parse-status (parse-partial-sexp (point-min) (point)))) + ;; don't match inside comments, since apostrophe is more common + (if (nth 4 parse-status) + (insert "'") + (js2-match-quote "'")))) + +(defun js2-mode-match-double-quote () + "Insert matching double-quote." + (interactive) + (js2-match-quote "\"")) + +(defun js2-mode-magic-close-paren () + "Skip over close-paren rather than inserting, where appropriate. +Uses some heuristics to try to figure out the right thing to do." + (interactive) + (let* ((parse-status (parse-partial-sexp (point-min) (point))) + (open-pos (nth 1 parse-status)) + (close last-input-char) + (open (cond + ((eq close 41) ; close-paren + 40) ; open-paren + ((eq close 93) ; close-bracket + 91) ; open-bracket + ((eq close ?}) + ?{) + (t nil)))) + (if (and (looking-at (string close)) + (eq open (char-after open-pos)) + (js2-same-line open-pos)) + (forward-char 1) + (insert (string close))) + (blink-matching-open))) + +(defun js2-mode-wait-for-parse (callback) + "Invoke CALLBACK when parsing is finished. +If parsing is already finished, calls CALLBACK immediately." + (if (not js2-mode-buffer-dirty-p) + (funcall callback) + (push callback js2-mode-pending-parse-callbacks) + (add-hook 'js2-parse-finished-hook #'js2-mode-parse-finished))) + +(defun js2-mode-parse-finished () + "Invoke callbacks in `js2-mode-pending-parse-callbacks'." + ;; We can't let errors propagate up, since it prevents the + ;; `js2-parse' method from completing normally and returning + ;; the ast, which makes things mysteriously not work right. + (unwind-protect + (dolist (cb js2-mode-pending-parse-callbacks) + (condition-case err + (funcall cb) + (error (message "%s" err)))) + (setq js2-mode-pending-parse-callbacks nil))) + +(defun js2-mode-flag-region (from to flag) + "Hide or show text from FROM to TO, according to FLAG. +If FLAG is nil then text is shown, while if FLAG is t the text is hidden. +Returns the created overlay if FLAG is non-nil." + (remove-overlays from to 'invisible 'js2-outline) + (when flag + (let ((o (make-overlay from to))) + (overlay-put o 'invisible 'js2-outline) + (overlay-put o 'isearch-open-invisible + 'js2-isearch-open-invisible) + o))) + +;; Function to be set as an outline-isearch-open-invisible' property +;; to the overlay that makes the outline invisible (see +;; `js2-mode-flag-region'). +(defun js2-isearch-open-invisible (overlay) + ;; We rely on the fact that isearch places point on the matched text. + (js2-mode-show-element)) + +(defun js2-mode-invisible-overlay-bounds (&optional pos) + "Return cons cell of bounds of folding overlay at POS. +Returns nil if not found." + (let ((overlays (overlays-at (or pos (point)))) + o) + (while (and overlays + (not o)) + (if (overlay-get (car overlays) 'invisible) + (setq o (car overlays)) + (setq overlays (cdr overlays)))) + (if o + (cons (overlay-start o) (overlay-end o))))) + +(defun js2-mode-function-at-point (&optional pos) + "Return the innermost function node enclosing current point. +Returns nil if point is not in a function." + (let ((node (js2-node-at-point pos))) + (while (and node (not (js2-function-node-p node))) + (setq node (js2-node-parent node))) + (if (js2-function-node-p node) + node))) + +(defun js2-mode-toggle-element () + "Hide or show the foldable element at the point." + (interactive) + (let (comment fn pos) + (save-excursion + (save-match-data + (cond + ;; /* ... */ comment? + ((js2-block-comment-p (setq comment (js2-comment-at-point))) + (if (js2-mode-invisible-overlay-bounds + (setq pos (+ 3 (js2-node-abs-pos comment)))) + (progn + (goto-char pos) + (js2-mode-show-element)) + (js2-mode-hide-element))) + + ;; //-comment? + ((save-excursion + (back-to-indentation) + (looking-at js2-mode-//-comment-re)) + (js2-mode-toggle-//-comment)) + + ;; function? + ((setq fn (js2-mode-function-at-point)) + (setq pos (and (js2-function-node-body fn) + (js2-node-abs-pos (js2-function-node-body fn)))) + (goto-char (1+ pos)) + (if (js2-mode-invisible-overlay-bounds) + (js2-mode-show-element) + (js2-mode-hide-element))) + (t + (message "Nothing at point to hide or show"))))))) + +(defun js2-mode-hide-element () + "Fold/hide contents of a block, showing ellipses. +Show the hidden text with \\[js2-mode-show-element]." + (interactive) + (if js2-mode-buffer-dirty-p + (js2-mode-wait-for-parse #'js2-mode-hide-element)) + (let (node body beg end) + (cond + ((js2-mode-invisible-overlay-bounds) + (message "already hidden")) + (t + (setq node (js2-node-at-point)) + (cond + ((js2-block-comment-p node) + (js2-mode-hide-comment node)) + (t + (while (and node (not (js2-function-node-p node))) + (setq node (js2-node-parent node))) + (if (and node + (setq body (js2-function-node-body node))) + (progn + (setq beg (js2-node-abs-pos body) + end (+ beg (js2-node-len body))) + (js2-mode-flag-region (1+ beg) (1- end) 'hide)) + (message "No collapsable element found at point")))))))) + +(defun js2-mode-show-element () + "Show the hidden element at current point." + (interactive) + (let ((bounds (js2-mode-invisible-overlay-bounds))) + (if bounds + (js2-mode-flag-region (car bounds) (cdr bounds) nil) + (message "Nothing to un-hide")))) + +(defun js2-mode-show-all () + "Show all of the text in the buffer." + (interactive) + (js2-mode-flag-region (point-min) (point-max) nil)) + +(defun js2-mode-toggle-hide-functions () + (interactive) + (if js2-mode-functions-hidden + (js2-mode-show-functions) + (js2-mode-hide-functions))) + +(defun js2-mode-hide-functions () + "Hides all non-nested function bodies in the buffer. +Use \\[js2-mode-show-all] to reveal them, or \\[js2-mode-show-element] +to open an individual entry." + (interactive) + (if js2-mode-buffer-dirty-p + (js2-mode-wait-for-parse #'js2-mode-hide-functions)) + (if (null js2-mode-ast) + (message "Oops - parsing failed") + (setq js2-mode-functions-hidden t) + (js2-visit-ast js2-mode-ast #'js2-mode-function-hider))) + +(defun js2-mode-function-hider (n endp) + (when (not endp) + (let ((tt (js2-node-type n)) + body beg end) + (cond + ((and (= tt js2-FUNCTION) + (setq body (js2-function-node-body n))) + (setq beg (js2-node-abs-pos body) + end (+ beg (js2-node-len body))) + (js2-mode-flag-region (1+ beg) (1- end) 'hide) + nil) ; don't process children of function + (t + t))))) ; keep processing other AST nodes + +(defun js2-mode-show-functions () + "Un-hide any folded function bodies in the buffer." + (interactive) + (setq js2-mode-functions-hidden nil) + (save-excursion + (goto-char (point-min)) + (while (/= (goto-char (next-overlay-change (point))) + (point-max)) + (dolist (o (overlays-at (point))) + (when (and (overlay-get o 'invisible) + (not (overlay-get o 'comment))) + (js2-mode-flag-region (overlay-start o) (overlay-end o) nil)))))) + +(defun js2-mode-hide-comment (n) + (let* ((head (if (eq (js2-comment-node-format n) 'jsdoc) + 3 ; /** + 2)) ; /* + (beg (+ (js2-node-abs-pos n) head)) + (end (- (+ beg (js2-node-len n)) head 2)) + (o (js2-mode-flag-region beg end 'hide))) + (overlay-put o 'comment t))) + +(defun js2-mode-toggle-hide-comments () + "Folds all block comments in the buffer. +Use \\[js2-mode-show-all] to reveal them, or \\[js2-mode-show-element] +to open an individual entry." + (interactive) + (if js2-mode-comments-hidden + (js2-mode-show-comments) + (js2-mode-hide-comments))) + +(defun js2-mode-hide-comments () + (interactive) + (if js2-mode-buffer-dirty-p + (js2-mode-wait-for-parse #'js2-mode-hide-comments)) + (if (null js2-mode-ast) + (message "Oops - parsing failed") + (setq js2-mode-comments-hidden t) + (dolist (n (js2-ast-root-comments js2-mode-ast)) + (let ((format (js2-comment-node-format n))) + (when (js2-block-comment-p n) + (js2-mode-hide-comment n)))) + (js2-mode-hide-//-comments))) + +(defsubst js2-mode-extend-//-comment (direction) + "Find start or end of a block of similar //-comment lines. +DIRECTION is -1 to look back, 1 to look forward. +INDENT is the indentation level to match. +Returns the end-of-line position of the furthest adjacent +//-comment line with the same indentation as the current line. +If there is no such matching line, returns current end of line." + (let ((pos (point-at-eol)) + (indent (current-indentation))) + (save-excursion + (save-match-data + (while (and (zerop (forward-line direction)) + (looking-at js2-mode-//-comment-re) + (eq indent (length (match-string 1)))) + (setq pos (point-at-eol))) + pos)))) + +(defun js2-mode-hide-//-comments () + "Fold adjacent 1-line comments, showing only snippet of first one." + (let (beg end) + (save-excursion + (save-match-data + (goto-char (point-min)) + (while (re-search-forward js2-mode-//-comment-re nil t) + (setq beg (point) + end (js2-mode-extend-//-comment 1)) + (unless (eq beg end) + (overlay-put (js2-mode-flag-region beg end 'hide) + 'comment t)) + (goto-char end) + (forward-char 1)))))) + +(defun js2-mode-toggle-//-comment () + "Fold or un-fold any multi-line //-comment at point. +Caller should have determined that this line starts with a //-comment." + (let* ((beg (point-at-eol)) + (end beg)) + (save-excursion + (goto-char end) + (if (js2-mode-invisible-overlay-bounds) + (js2-mode-show-element) + ;; else hide the comment + (setq beg (js2-mode-extend-//-comment -1) + end (js2-mode-extend-//-comment 1)) + (unless (eq beg end) + (overlay-put (js2-mode-flag-region beg end 'hide) + 'comment t)))))) + +(defun js2-mode-show-comments () + "Un-hide any hidden comments, leaving other hidden elements alone." + (interactive) + (setq js2-mode-comments-hidden nil) + (save-excursion + (goto-char (point-min)) + (while (/= (goto-char (next-overlay-change (point))) + (point-max)) + (dolist (o (overlays-at (point))) + (when (overlay-get o 'comment) + (js2-mode-flag-region (overlay-start o) (overlay-end o) nil)))))) + +(defun js2-mode-display-warnings-and-errors () + "Turn on display of warnings and errors." + (interactive) + (setq js2-mode-show-parse-errors t + js2-mode-show-strict-warnings t) + (js2-reparse 'force)) + +(defun js2-mode-hide-warnings-and-errors () + "Turn off display of warnings and errors." + (interactive) + (setq js2-mode-show-parse-errors nil + js2-mode-show-strict-warnings nil) + (js2-reparse 'force)) + +(defun js2-mode-toggle-warnings-and-errors () + "Toggle the display of warnings and errors. +Some users don't like having warnings/errors reported while they type." + (interactive) + (setq js2-mode-show-parse-errors (not js2-mode-show-parse-errors) + js2-mode-show-strict-warnings (not js2-mode-show-strict-warnings)) + (if (interactive-p) + (message "warnings and errors %s" + (if js2-mode-show-parse-errors + "enabled" + "disabled"))) + (js2-reparse 'force)) + +(defun js2-mode-customize () + (interactive) + (customize-group 'js2-mode)) + +(defun js2-mode-forward-sexp (&optional arg) + "Move forward across one statement or balanced expression. +With ARG, do it that many times. Negative arg -N means +move backward across N balanced expressions." + (interactive "p") + (setq arg (or arg 1)) + (if js2-mode-buffer-dirty-p + (js2-mode-wait-for-parse #'js2-mode-forward-sexp)) + (let (node end (start (point))) + (cond + ;; backward-sexp + ;; could probably make this "better" for some cases: + ;; - if in statement block (e.g. function body), go to parent + ;; - infix exprs like (foo in bar) - maybe go to beginning + ;; of infix expr if in the right-side expression? + ((and arg (minusp arg)) + (dotimes (i (- arg)) + (js2-backward-sws) + (forward-char -1) ; enter the node we backed up to + (setq node (js2-node-at-point (point) t)) + (goto-char (if node + (js2-node-abs-pos node) + (point-min))))) + (t + ;; forward-sexp + (js2-forward-sws) + (dotimes (i arg) + (js2-forward-sws) + (setq node (js2-node-at-point (point) t) + end (if node (+ (js2-node-abs-pos node) + (js2-node-len node)))) + (goto-char (or end (point-max)))))))) + +(defun js2-next-error (&optional arg reset) + "Move to next parse error. +Typically invoked via \\[next-error]. +ARG is the number of errors, forward or backward, to move. +RESET means start over from the beginning." + (interactive "p") + (if (or (null js2-mode-ast) + (and (null (js2-ast-root-errors js2-mode-ast)) + (null (js2-ast-root-warnings js2-mode-ast)))) + (message "No errors") + (when reset + (goto-char (point-min))) + (let* ((errs (copy-sequence + (append (js2-ast-root-errors js2-mode-ast) + (js2-ast-root-warnings js2-mode-ast)))) + (continue t) + (start (point)) + (count (or arg 1)) + (backward (minusp count)) + (sorter (if backward '> '<)) + (stopper (if backward '< '>)) + (count (abs count)) + all-errs + err) + ;; sort by start position + (setq errs (sort errs (lambda (e1 e2) + (funcall sorter (second e1) (second e2)))) + all-errs errs) + ;; find nth error with pos > start + (while (and errs continue) + (when (funcall stopper (cadar errs) start) + (setq err (car errs)) + (if (zerop (decf count)) + (setq continue nil))) + (setq errs (cdr errs))) + (if err + (goto-char (second err)) + ;; wrap around to first error + (goto-char (second (car all-errs))) + ;; if we were already on it, echo msg again + (if (= (point) start) + (js2-echo-error (point) (point))))))) + +(defun js2-mouse-3 () + "Make right-click move the point to the click location. +This makes right-click context menu operations a bit more intuitive. +The point will not move if the region is active, however, to avoid +destroying the region selection." + (interactive) + (when (and js2-move-point-on-right-click + (not mark-active)) + (let ((e last-input-event)) + (ignore-errors + (goto-char (cadadr e)))))) + +(defun js2-mode-create-imenu-index () + "Return an alist for `imenu--index-alist'." + ;; This is built up in `js2-parse-record-imenu' during parsing. + (when js2-mode-ast + ;; if we have an ast but no recorder, they're requesting a rescan + (unless js2-imenu-recorder + (js2-reparse 'force)) + (prog1 + (js2-build-imenu-index) + (setq js2-imenu-recorder nil + js2-imenu-function-map nil)))) + +(defun js2-mode-find-tag () + "Replacement for `find-tag-default'. +`find-tag-default' returns a ridiculous answer inside comments." + (let (beg end) + (js2-with-underscore-as-word-syntax + (save-excursion + (if (and (not (looking-at "[A-Za-z0-9_$]")) + (looking-back "[A-Za-z0-9_$]")) + (setq beg (progn (forward-word -1) (point)) + end (progn (forward-word 1) (point))) + (setq beg (progn (forward-word 1) (point)) + end (progn (forward-word -1) (point)))) + (replace-regexp-in-string + "[\"']" "" + (buffer-substring-no-properties beg end)))))) + +(defun js2-mode-forward-sibling () + "Move to the end of the sibling following point in parent. +Returns non-nil if successful, or nil if there was no following sibling." + (let* ((node (js2-node-at-point)) + (parent (js2-mode-find-enclosing-fn node)) + sib) + (when (setq sib (js2-node-find-child-after (point) parent)) + (goto-char (+ (js2-node-abs-pos sib) + (js2-node-len sib)))))) + +(defun js2-mode-backward-sibling () + "Move to the beginning of the sibling node preceding point in parent. +Parent is defined as the enclosing script or function." + (let* ((node (js2-node-at-point)) + (parent (js2-mode-find-enclosing-fn node)) + sib) + (when (setq sib (js2-node-find-child-before (point) parent)) + (goto-char (js2-node-abs-pos sib))))) + +(defun js2-beginning-of-defun () + "Go to line on which current function starts, and return non-nil. +If we're not in a function, go to beginning of previous script-level element." + (interactive) + (let ((parent (js2-node-parent-script-or-fn (js2-node-at-point))) + pos sib) + (cond + ((and (js2-function-node-p parent) + (not (eq (point) (setq pos (js2-node-abs-pos parent))))) + (goto-char pos)) + (t + (js2-mode-backward-sibling))))) + +(defun js2-end-of-defun () + "Go to the char after the last position of the current function. +If we're not in a function, skips over the next script-level element." + (interactive) + (let ((parent (js2-node-parent-script-or-fn (js2-node-at-point)))) + (if (not (js2-function-node-p parent)) + ;; punt: skip over next script-level element beyond point + (js2-mode-forward-sibling) + (goto-char (+ 1 (+ (js2-node-abs-pos parent) + (js2-node-len parent))))))) + +(defun js2-mark-defun (&optional allow-extend) + "Put mark at end of this function, point at beginning. +The function marked is the one that contains point. + +Interactively, if this command is repeated, +or (in Transient Mark mode) if the mark is active, +it marks the next defun after the ones already marked." + (interactive "p") + (let (extended) + (when (and allow-extend + (or (and (eq last-command this-command) (mark t)) + (and transient-mark-mode mark-active))) + (let ((sib (save-excursion + (goto-char (mark)) + (if (js2-mode-forward-sibling) + (point)))) + node) + (if sib + (progn + (set-mark sib) + (setq extended t)) + ;; no more siblings - try extending to enclosing node + (goto-char (mark t))))) + (when (not extended) + (let ((node (js2-node-at-point (point) t)) ; skip comments + ast fn stmt parent beg end) + (when (js2-ast-root-p node) + (setq ast node + node (or (js2-node-find-child-after (point) node) + (js2-node-find-child-before (point) node)))) + ;; only mark whole buffer if we can't find any children + (if (null node) + (setq node ast)) + (if (js2-function-node-p node) + (setq parent node) + (setq fn (js2-mode-find-enclosing-fn node) + stmt (if (or (null fn) + (js2-ast-root-p fn)) + (js2-mode-find-first-stmt node)) + parent (or stmt fn))) + (setq beg (js2-node-abs-pos parent) + end (+ beg (js2-node-len parent))) + (push-mark beg) + (goto-char end) + (exchange-point-and-mark))))) + +(defun js2-narrow-to-defun () + "Narrow to the function enclosing point." + (interactive) + (let* ((node (js2-node-at-point (point) t)) ; skip comments + (fn (if (js2-script-node-p node) + node + (js2-mode-find-enclosing-fn node))) + (beg (js2-node-abs-pos fn))) + (unless (js2-ast-root-p fn) + (narrow-to-region beg (+ beg (js2-node-len fn)))))) + +(defalias 'js2r 'js2-mode-reset) + +(provide 'js2-mode) + +;;; js2-mode.el ends here + + +;;; js2.el ends here