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| /* | |
| * JSHint, by JSHint Community. | |
| * | |
| * Licensed under the same slightly modified MIT license that JSLint is. | |
| * It stops evil-doers everywhere. | |
| * | |
| * JSHint is a derivative work of JSLint: | |
| * | |
| * Copyright (c) 2002 Douglas Crockford (www.JSLint.com) | |
| * | |
| * Permission is hereby granted, free of charge, to any person obtaining | |
| * a copy of this software and associated documentation files (the "Software"), | |
| * to deal in the Software without restriction, including without limitation | |
| * the rights to use, copy, modify, merge, publish, distribute, sublicense, | |
| * and/or sell copies of the Software, and to permit persons to whom | |
| * the Software is furnished to do so, subject to the following conditions: | |
| * | |
| * The above copyright notice and this permission notice shall be included | |
| * in all copies or substantial portions of the Software. | |
| * | |
| * The Software shall be used for Good, not Evil. | |
| * | |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
| * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING | |
| * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER | |
| * DEALINGS IN THE SOFTWARE. | |
| * | |
| * JSHint was forked from 2010-12-16 edition of JSLint. | |
| * | |
| */ | |
| /* | |
| JSHINT is a global function. It takes two parameters. | |
| var myResult = JSHINT(source, option); | |
| The first parameter is either a string or an array of strings. If it is a | |
| string, it will be split on '\n' or '\r'. If it is an array of strings, it | |
| is assumed that each string represents one line. The source can be a | |
| JavaScript text or a JSON text. | |
| The second parameter is an optional object of options which control the | |
| operation of JSHINT. Most of the options are booleans: They are all | |
| optional and have a default value of false. One of the options, predef, | |
| can be an array of names, which will be used to declare global variables, | |
| or an object whose keys are used as global names, with a boolean value | |
| that determines if they are assignable. | |
| If it checks out, JSHINT returns true. Otherwise, it returns false. | |
| If false, you can inspect JSHINT.errors to find out the problems. | |
| JSHINT.errors is an array of objects containing these members: | |
| { | |
| line : The line (relative to 0) at which the lint was found | |
| character : The character (relative to 0) at which the lint was found | |
| reason : The problem | |
| evidence : The text line in which the problem occurred | |
| raw : The raw message before the details were inserted | |
| a : The first detail | |
| b : The second detail | |
| c : The third detail | |
| d : The fourth detail | |
| } | |
| If a fatal error was found, a null will be the last element of the | |
| JSHINT.errors array. | |
| You can request a Function Report, which shows all of the functions | |
| and the parameters and vars that they use. This can be used to find | |
| implied global variables and other problems. The report is in HTML and | |
| can be inserted in an HTML <body>. | |
| var myReport = JSHINT.report(limited); | |
| If limited is true, then the report will be limited to only errors. | |
| You can request a data structure which contains JSHint's results. | |
| var myData = JSHINT.data(); | |
| It returns a structure with this form: | |
| { | |
| errors: [ | |
| { | |
| line: NUMBER, | |
| character: NUMBER, | |
| reason: STRING, | |
| evidence: STRING | |
| } | |
| ], | |
| functions: [ | |
| name: STRING, | |
| line: NUMBER, | |
| last: NUMBER, | |
| param: [ | |
| STRING | |
| ], | |
| closure: [ | |
| STRING | |
| ], | |
| var: [ | |
| STRING | |
| ], | |
| exception: [ | |
| STRING | |
| ], | |
| outer: [ | |
| STRING | |
| ], | |
| unused: [ | |
| STRING | |
| ], | |
| global: [ | |
| STRING | |
| ], | |
| label: [ | |
| STRING | |
| ] | |
| ], | |
| globals: [ | |
| STRING | |
| ], | |
| member: { | |
| STRING: NUMBER | |
| }, | |
| unuseds: [ | |
| { | |
| name: STRING, | |
| line: NUMBER | |
| } | |
| ], | |
| implieds: [ | |
| { | |
| name: STRING, | |
| line: NUMBER | |
| } | |
| ], | |
| urls: [ | |
| STRING | |
| ], | |
| json: BOOLEAN | |
| } | |
| Empty arrays will not be included. | |
| */ | |
| /*jshint | |
| evil: true, nomen: false, onevar: false, regexp: false, strict: true, boss: true | |
| */ | |
| /*members "\b", "\t", "\n", "\f", "\r", "!=", "!==", "\"", "%", | |
| "(begin)", "(breakage)", "(context)", "(error)", "(global)", | |
| "(identifier)", "(last)", "(line)", "(loopage)", "(name)", "(onevar)", | |
| "(params)", "(scope)", "(statement)", "(verb)", "*", "+", "++", "-", | |
| "--", "\/", "<", "<=", "==", "===", ">", ">=", $, $$, $A, $F, $H, $R, $break, | |
| $continue, $w, Abstract, Ajax, __filename, __dirname, ActiveXObject, Array, | |
| ArrayBuffer, ArrayBufferView, Autocompleter, Assets, Boolean, Builder, | |
| Buffer, Browser, COM, CScript, Canvas, CustomAnimation, Class, Control, | |
| Chain, Color, Cookie, Core, DataView, Date, Debug, Draggable, Draggables, | |
| Droppables, Document, DomReady, DOMReady, Drag, E, Enumerator, Enumerable, | |
| Element, Elements, Error, Effect, EvalError, Event, Events, FadeAnimation, | |
| Field, Flash, Float32Array, Float64Array, Form, FormField, Frame, Function, | |
| Fx, Group, Hash, HotKey, HTMLElement, HtmlTable, Iframe, IframeShim, Image, | |
| Int16Array, Int32Array, Int8Array, Insertion, InputValidator, JSON, Keyboard, | |
| Locale, LN10, LN2, LOG10E, LOG2E, MAX_VALUE, MIN_VALUE, Mask, Math, MenuItem, | |
| MoveAnimation, MooTools, Native, NEGATIVE_INFINITY, Number, Object, | |
| ObjectRange, Option, Options, OverText, PI, POSITIVE_INFINITY, | |
| PeriodicalExecuter, Point, Position, Prototype, RangeError, Rectangle, | |
| ReferenceError, RegExp, ResizeAnimation, Request, RotateAnimation, SQRT1_2, | |
| SQRT2, ScrollBar, Scriptaculous, Scroller, Slick, Slider, Selector, String, | |
| Style, SyntaxError, Sortable, Sortables, SortableObserver, Sound, Spinner, | |
| System, Swiff, Text, TextArea, Template, Timer, Tips, Type, TypeError, | |
| Toggle, Try, URI, URIError, URL, VBArray, WScript, Web, Window, XMLDOM, | |
| XMLHttpRequest, XPathEvaluator, XPathException, XPathExpression, | |
| XPathNamespace, XPathNSResolver, XPathResult, "\\", a, addEventListener, | |
| address, alert, apply, applicationCache, arguments, arity, asi, b, bitwise, | |
| block, blur, boolOptions, boss, browser, c, call, callee, caller, cases, | |
| charAt, charCodeAt, character, clearInterval, clearTimeout, close, closed, | |
| closure, comment, condition, confirm, console, constructor, content, couch, | |
| create, css, curly, d, data, datalist, dd, debug, decodeURI, | |
| decodeURIComponent, defaultStatus, defineClass, deserialize, devel, | |
| document, edition, else, emit, encodeURI, encodeURIComponent, entityify, | |
| eqeqeq, eqnull, errors, es5, escape, eval, event, evidence, evil, ex, | |
| exception, exec, exps, expr, exports, FileReader, first, floor, focus, | |
| forin, fragment, frames, from, fromCharCode, fud, funct, function, functions, | |
| g, gc, getComputedStyle, getRow, GLOBAL, global, globals, globalstrict, | |
| hasOwnProperty, help, history, i, id, identifier, immed, implieds, | |
| include, indent, indexOf, init, ins, instanceOf, isAlpha, | |
| isApplicationRunning, isArray, isDigit, isFinite, isNaN, join, jshint, | |
| JSHINT, json, jquery, jQuery, keys, label, labelled, last, laxbreak, | |
| latedef, lbp, led, left, length, line, load, loadClass, localStorage, | |
| location, log, loopfunc, m, match, maxerr, maxlen, member,message, meta, | |
| module, moveBy, moveTo, mootools, name, navigator, new, newcap, noarg, | |
| node, noempty, nomen, nonew, nud, onbeforeunload, onblur, onerror, onevar, | |
| onfocus, onload, onresize, onunload, open, openDatabase, openURL, opener, | |
| opera, outer, param, parent, parseFloat, parseInt, passfail, plusplus, | |
| predef, print, process, prompt, prototype, prototypejs, push, quit, range, | |
| raw, reach, reason, regexp, readFile, readUrl, removeEventListener, replace, | |
| report, require, reserved, resizeBy, resizeTo, resolvePath, resumeUpdates, | |
| respond, rhino, right, runCommand, scroll, screen, scrollBy, scrollTo, | |
| scrollbar, search, seal, send, serialize, setInterval, setTimeout, shift, | |
| slice, sort,spawn, split, stack, status, start, strict, sub, substr, supernew, | |
| shadow, supplant, sum, sync, test, toLowerCase, toString, toUpperCase, toint32, | |
| token, top, type, typeOf, Uint16Array, Uint32Array, Uint8Array, undef, | |
| unused, urls, value, valueOf, var, version, WebSocket, white, window, Worker | |
| */ | |
| /*global exports: false */ | |
| // We build the application inside a function so that we produce only a single | |
| // global variable. That function will be invoked immediately, and its return | |
| // value is the JSHINT function itself. | |
| var JSHINT = (function () { | |
| "use strict"; | |
| var anonname, // The guessed name for anonymous functions. | |
| // These are operators that should not be used with the ! operator. | |
| bang = { | |
| '<' : true, | |
| '<=' : true, | |
| '==' : true, | |
| '===': true, | |
| '!==': true, | |
| '!=' : true, | |
| '>' : true, | |
| '>=' : true, | |
| '+' : true, | |
| '-' : true, | |
| '*' : true, | |
| '/' : true, | |
| '%' : true | |
| }, | |
| // These are the JSHint boolean options. | |
| boolOptions = { | |
| asi : true, // if automatic semicolon insertion should be tolerated | |
| bitwise : true, // if bitwise operators should not be allowed | |
| boss : true, // if advanced usage of assignments should be allowed | |
| browser : true, // if the standard browser globals should be predefined | |
| couch : true, // if CouchDB globals should be predefined | |
| curly : true, // if curly braces around blocks should be required (even in if/for/while) | |
| debug : true, // if debugger statements should be allowed | |
| devel : true, // if logging globals should be predefined (console, alert, etc.) | |
| eqeqeq : true, // if === should be required | |
| eqnull : true, // if == null comparisons should be tolerated | |
| es5 : true, // if ES5 syntax should be allowed | |
| evil : true, // if eval should be allowed | |
| expr : true, // if ExpressionStatement should be allowed as Programs | |
| forin : true, // if for in statements must filter | |
| globalstrict: true, // if global "use strict"; should be allowed (also enables 'strict') | |
| immed : true, // if immediate invocations must be wrapped in parens | |
| jquery : true, // if jQuery globals should be predefined | |
| latedef : true, // if the use before definition should not be tolerated | |
| laxbreak : true, // if line breaks should not be checked | |
| loopfunc : true, // if functions should be allowed to be defined within loops | |
| mootools : true, // if MooTools globals should be predefined | |
| newcap : true, // if constructor names must be capitalized | |
| noarg : true, // if arguments.caller and arguments.callee should be disallowed | |
| node : true, // if the Node.js environment globals should be predefined | |
| noempty : true, // if empty blocks should be disallowed | |
| nonew : true, // if using `new` for side-effects should be disallowed | |
| nomen : true, // if names should be checked | |
| onevar : true, // if only one var statement per function should be allowed | |
| passfail : true, // if the scan should stop on first error | |
| plusplus : true, // if increment/decrement should not be allowed | |
| prototypejs : true, // if Prototype and Scriptaculous globals shoudl be predefined | |
| regexp : true, // if the . should not be allowed in regexp literals | |
| rhino : true, // if the Rhino environment globals should be predefined | |
| undef : true, // if variables should be declared before used | |
| shadow : true, // if variable shadowing should be tolerated | |
| strict : true, // require the "use strict"; pragma | |
| sub : true, // if all forms of subscript notation are tolerated | |
| supernew : true, // if `new function () { ... };` and `new Object;` should be tolerated | |
| white : true // if strict whitespace rules apply | |
| }, | |
| // browser contains a set of global names which are commonly provided by a | |
| // web browser environment. | |
| browser = { | |
| ArrayBuffer : false, | |
| ArrayBufferView : false, | |
| addEventListener: false, | |
| applicationCache: false, | |
| blur : false, | |
| clearInterval : false, | |
| clearTimeout : false, | |
| close : false, | |
| closed : false, | |
| DataView : false, | |
| defaultStatus : false, | |
| document : false, | |
| event : false, | |
| FileReader : false, | |
| Float32Array : false, | |
| Float64Array : false, | |
| focus : false, | |
| frames : false, | |
| getComputedStyle: false, | |
| HTMLElement : false, | |
| history : false, | |
| Int16Array : false, | |
| Int32Array : false, | |
| Int8Array : false, | |
| Image : false, | |
| length : false, | |
| localStorage : false, | |
| location : false, | |
| moveBy : false, | |
| moveTo : false, | |
| name : false, | |
| navigator : false, | |
| onbeforeunload : true, | |
| onblur : true, | |
| onerror : true, | |
| onfocus : true, | |
| onload : true, | |
| onresize : true, | |
| onunload : true, | |
| open : false, | |
| openDatabase : false, | |
| opener : false, | |
| Option : false, | |
| parent : false, | |
| print : false, | |
| removeEventListener: false, | |
| resizeBy : false, | |
| resizeTo : false, | |
| screen : false, | |
| scroll : false, | |
| scrollBy : false, | |
| scrollTo : false, | |
| setInterval : false, | |
| setTimeout : false, | |
| status : false, | |
| top : false, | |
| Uint16Array : false, | |
| Uint32Array : false, | |
| Uint8Array : false, | |
| WebSocket : false, | |
| window : false, | |
| Worker : false, | |
| XMLHttpRequest : false, | |
| XPathEvaluator : false, | |
| XPathException : false, | |
| XPathExpression : false, | |
| XPathNamespace : false, | |
| XPathNSResolver : false, | |
| XPathResult : false | |
| }, | |
| couch = { | |
| "require" : false, | |
| respond : false, | |
| getRow : false, | |
| emit : false, | |
| send : false, | |
| start : false, | |
| sum : false, | |
| log : false, | |
| exports : false, | |
| module : false | |
| }, | |
| devel = { | |
| alert : false, | |
| confirm : false, | |
| console : false, | |
| Debug : false, | |
| opera : false, | |
| prompt : false | |
| }, | |
| escapes = { | |
| '\b': '\\b', | |
| '\t': '\\t', | |
| '\n': '\\n', | |
| '\f': '\\f', | |
| '\r': '\\r', | |
| '"' : '\\"', | |
| '/' : '\\/', | |
| '\\': '\\\\' | |
| }, | |
| funct, // The current function | |
| functionicity = [ | |
| 'closure', 'exception', 'global', 'label', | |
| 'outer', 'unused', 'var' | |
| ], | |
| functions, // All of the functions | |
| global, // The global scope | |
| implied, // Implied globals | |
| inblock, | |
| indent, | |
| jsonmode, | |
| jquery = { | |
| '$' : false, | |
| jQuery : false | |
| }, | |
| lines, | |
| lookahead, | |
| member, | |
| membersOnly, | |
| mootools = { | |
| '$' : false, | |
| '$$' : false, | |
| Assets : false, | |
| Browser : false, | |
| Chain : false, | |
| Class : false, | |
| Color : false, | |
| Cookie : false, | |
| Core : false, | |
| Document : false, | |
| DomReady : false, | |
| DOMReady : false, | |
| Drag : false, | |
| Element : false, | |
| Elements : false, | |
| Event : false, | |
| Events : false, | |
| Fx : false, | |
| Group : false, | |
| Hash : false, | |
| HtmlTable : false, | |
| Iframe : false, | |
| IframeShim : false, | |
| InputValidator : false, | |
| instanceOf : false, | |
| Keyboard : false, | |
| Locale : false, | |
| Mask : false, | |
| MooTools : false, | |
| Native : false, | |
| Options : false, | |
| OverText : false, | |
| Request : false, | |
| Scroller : false, | |
| Slick : false, | |
| Slider : false, | |
| Sortables : false, | |
| Spinner : false, | |
| Swiff : false, | |
| Tips : false, | |
| Type : false, | |
| typeOf : false, | |
| URI : false, | |
| Window : false | |
| }, | |
| nexttoken, | |
| node = { | |
| __filename : false, | |
| __dirname : false, | |
| exports : false, | |
| Buffer : false, | |
| GLOBAL : false, | |
| global : false, | |
| module : false, | |
| process : false, | |
| require : false | |
| }, | |
| noreach, | |
| option, | |
| predefined, // Global variables defined by option | |
| prereg, | |
| prevtoken, | |
| prototypejs = { | |
| '$' : false, | |
| '$$' : false, | |
| '$A' : false, | |
| '$F' : false, | |
| '$H' : false, | |
| '$R' : false, | |
| '$break' : false, | |
| '$continue' : false, | |
| '$w' : false, | |
| Abstract : false, | |
| Ajax : false, | |
| Class : false, | |
| Enumerable : false, | |
| Element : false, | |
| Event : false, | |
| Field : false, | |
| Form : false, | |
| Hash : false, | |
| Insertion : false, | |
| ObjectRange : false, | |
| PeriodicalExecuter: false, | |
| Position : false, | |
| Prototype : false, | |
| Selector : false, | |
| Template : false, | |
| Toggle : false, | |
| Try : false, | |
| Autocompleter : false, | |
| Builder : false, | |
| Control : false, | |
| Draggable : false, | |
| Draggables : false, | |
| Droppables : false, | |
| Effect : false, | |
| Sortable : false, | |
| SortableObserver : false, | |
| Sound : false, | |
| Scriptaculous : false | |
| }, | |
| rhino = { | |
| defineClass : false, | |
| deserialize : false, | |
| gc : false, | |
| help : false, | |
| load : false, | |
| loadClass : false, | |
| print : false, | |
| quit : false, | |
| readFile : false, | |
| readUrl : false, | |
| runCommand : false, | |
| seal : false, | |
| serialize : false, | |
| spawn : false, | |
| sync : false, | |
| toint32 : false, | |
| version : false | |
| }, | |
| scope, // The current scope | |
| src, | |
| stack, | |
| // standard contains the global names that are provided by the | |
| // ECMAScript standard. | |
| standard = { | |
| Array : false, | |
| Boolean : false, | |
| Date : false, | |
| decodeURI : false, | |
| decodeURIComponent : false, | |
| encodeURI : false, | |
| encodeURIComponent : false, | |
| Error : false, | |
| 'eval' : false, | |
| EvalError : false, | |
| Function : false, | |
| hasOwnProperty : false, | |
| isFinite : false, | |
| isNaN : false, | |
| JSON : false, | |
| Math : false, | |
| Number : false, | |
| Object : false, | |
| parseInt : false, | |
| parseFloat : false, | |
| RangeError : false, | |
| ReferenceError : false, | |
| RegExp : false, | |
| String : false, | |
| SyntaxError : false, | |
| TypeError : false, | |
| URIError : false | |
| }, | |
| standard_member = { | |
| E : true, | |
| LN2 : true, | |
| LN10 : true, | |
| LOG2E : true, | |
| LOG10E : true, | |
| MAX_VALUE : true, | |
| MIN_VALUE : true, | |
| NEGATIVE_INFINITY : true, | |
| PI : true, | |
| POSITIVE_INFINITY : true, | |
| SQRT1_2 : true, | |
| SQRT2 : true | |
| }, | |
| strict_mode, | |
| syntax = {}, | |
| tab, | |
| token, | |
| urls, | |
| warnings, | |
| // Regular expressions. Some of these are stupidly long. | |
| // unsafe comment or string | |
| ax = /@cc|<\/?|script|\]\s*\]|<\s*!|</i, | |
| // unsafe characters that are silently deleted by one or more browsers | |
| cx = /[\u0000-\u001f\u007f-\u009f\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/, | |
| // token | |
| tx = /^\s*([(){}\[.,:;'"~\?\]#@]|==?=?|\/(\*(jshint|jslint|members?|global)?|=|\/)?|\*[\/=]?|\+(?:=|\++)?|-(?:=|-+)?|%=?|&[&=]?|\|[|=]?|>>?>?=?|<([\/=!]|\!(\[|--)?|<=?)?|\^=?|\!=?=?|[a-zA-Z_$][a-zA-Z0-9_$]*|[0-9]+([xX][0-9a-fA-F]+|\.[0-9]*)?([eE][+\-]?[0-9]+)?)/, | |
| // characters in strings that need escapement | |
| nx = /[\u0000-\u001f&<"\/\\\u007f-\u009f\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/, | |
| nxg = /[\u0000-\u001f&<"\/\\\u007f-\u009f\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g, | |
| // star slash | |
| lx = /\*\/|\/\*/, | |
| // identifier | |
| ix = /^([a-zA-Z_$][a-zA-Z0-9_$]*)$/, | |
| // javascript url | |
| jx = /^(?:javascript|jscript|ecmascript|vbscript|mocha|livescript)\s*:/i, | |
| // catches /* falls through */ comments | |
| ft = /^\s*\/\*\s*falls\sthrough\s*\*\/\s*$/; | |
| function F() {} // Used by Object.create | |
| function is_own(object, name) { | |
| // The object.hasOwnProperty method fails when the property under consideration | |
| // is named 'hasOwnProperty'. So we have to use this more convoluted form. | |
| return Object.prototype.hasOwnProperty.call(object, name); | |
| } | |
| // Provide critical ES5 functions to ES3. | |
| if (typeof Array.isArray !== 'function') { | |
| Array.isArray = function (o) { | |
| return Object.prototype.toString.apply(o) === '[object Array]'; | |
| }; | |
| } | |
| if (typeof Object.create !== 'function') { | |
| Object.create = function (o) { | |
| F.prototype = o; | |
| return new F(); | |
| }; | |
| } | |
| if (typeof Object.keys !== 'function') { | |
| Object.keys = function (o) { | |
| var a = [], k; | |
| for (k in o) { | |
| if (is_own(o, k)) { | |
| a.push(k); | |
| } | |
| } | |
| return a; | |
| }; | |
| } | |
| // Non standard methods | |
| if (typeof String.prototype.entityify !== 'function') { | |
| String.prototype.entityify = function () { | |
| return this | |
| .replace(/&/g, '&') | |
| .replace(/</g, '<') | |
| .replace(/>/g, '>'); | |
| }; | |
| } | |
| if (typeof String.prototype.isAlpha !== 'function') { | |
| String.prototype.isAlpha = function () { | |
| return (this >= 'a' && this <= 'z\uffff') || | |
| (this >= 'A' && this <= 'Z\uffff'); | |
| }; | |
| } | |
| if (typeof String.prototype.isDigit !== 'function') { | |
| String.prototype.isDigit = function () { | |
| return (this >= '0' && this <= '9'); | |
| }; | |
| } | |
| if (typeof String.prototype.supplant !== 'function') { | |
| String.prototype.supplant = function (o) { | |
| return this.replace(/\{([^{}]*)\}/g, function (a, b) { | |
| var r = o[b]; | |
| return typeof r === 'string' || typeof r === 'number' ? r : a; | |
| }); | |
| }; | |
| } | |
| if (typeof String.prototype.name !== 'function') { | |
| String.prototype.name = function () { | |
| // If the string looks like an identifier, then we can return it as is. | |
| // If the string contains no control characters, no quote characters, and no | |
| // backslash characters, then we can simply slap some quotes around it. | |
| // Otherwise we must also replace the offending characters with safe | |
| // sequences. | |
| if (ix.test(this)) { | |
| return this; | |
| } | |
| if (nx.test(this)) { | |
| return '"' + this.replace(nxg, function (a) { | |
| var c = escapes[a]; | |
| if (c) { | |
| return c; | |
| } | |
| return '\\u' + ('0000' + a.charCodeAt().toString(16)).slice(-4); | |
| }) + '"'; | |
| } | |
| return '"' + this + '"'; | |
| }; | |
| } | |
| function combine(t, o) { | |
| var n; | |
| for (n in o) { | |
| if (is_own(o, n)) { | |
| t[n] = o[n]; | |
| } | |
| } | |
| } | |
| function assume() { | |
| if (option.couch) | |
| combine(predefined, couch); | |
| if (option.rhino) | |
| combine(predefined, rhino); | |
| if (option.prototypejs) | |
| combine(predefined, prototypejs); | |
| if (option.node) | |
| combine(predefined, node); | |
| if (option.devel) | |
| combine(predefined, devel); | |
| if (option.browser) | |
| combine(predefined, browser); | |
| if (option.jquery) | |
| combine(predefined, jquery); | |
| if (option.mootools) | |
| combine(predefined, mootools); | |
| if (option.globalstrict) | |
| option.strict = true; | |
| } | |
| // Produce an error warning. | |
| function quit(m, l, ch) { | |
| throw { | |
| name: 'JSHintError', | |
| line: l, | |
| character: ch, | |
| message: m + " (" + Math.floor((l / lines.length) * 100) + | |
| "% scanned)." | |
| }; | |
| } | |
| function warning(m, t, a, b, c, d) { | |
| var ch, l, w; | |
| t = t || nexttoken; | |
| if (t.id === '(end)') { // `~ | |
| t = token; | |
| } | |
| l = t.line || 0; | |
| ch = t.from || 0; | |
| w = { | |
| id: '(error)', | |
| raw: m, | |
| evidence: lines[l - 1] || '', | |
| line: l, | |
| character: ch, | |
| a: a, | |
| b: b, | |
| c: c, | |
| d: d | |
| }; | |
| w.reason = m.supplant(w); | |
| JSHINT.errors.push(w); | |
| if (option.passfail) { | |
| quit('Stopping. ', l, ch); | |
| } | |
| warnings += 1; | |
| if (warnings >= option.maxerr) { | |
| quit("Too many errors.", l, ch); | |
| } | |
| return w; | |
| } | |
| function warningAt(m, l, ch, a, b, c, d) { | |
| return warning(m, { | |
| line: l, | |
| from: ch | |
| }, a, b, c, d); | |
| } | |
| function error(m, t, a, b, c, d) { | |
| var w = warning(m, t, a, b, c, d); | |
| quit("Stopping, unable to continue.", w.line, w.character); | |
| } | |
| function errorAt(m, l, ch, a, b, c, d) { | |
| return error(m, { | |
| line: l, | |
| from: ch | |
| }, a, b, c, d); | |
| } | |
| // lexical analysis and token construction | |
| var lex = (function lex() { | |
| var character, from, line, s; | |
| // Private lex methods | |
| function nextLine() { | |
| var at, | |
| tw; // trailing whitespace check | |
| if (line >= lines.length) | |
| return false; | |
| character = 1; | |
| s = lines[line]; | |
| line += 1; | |
| at = s.search(/ \t/); | |
| if (at >= 0) | |
| warningAt("Mixed spaces and tabs.", line, at + 1); | |
| s = s.replace(/\t/g, tab); | |
| at = s.search(cx); | |
| if (at >= 0) | |
| warningAt("Unsafe character.", line, at); | |
| if (option.maxlen && option.maxlen < s.length) | |
| warningAt("Line too long.", line, s.length); | |
| // Check for trailing whitespaces | |
| tw = s.search(/\s+$/); | |
| if (option.white && ~tw) | |
| warningAt("Trailing whitespace.", line, tw); | |
| return true; | |
| } | |
| // Produce a token object. The token inherits from a syntax symbol. | |
| function it(type, value) { | |
| var i, t; | |
| if (type === '(color)' || type === '(range)') { | |
| t = {type: type}; | |
| } else if (type === '(punctuator)' || | |
| (type === '(identifier)' && is_own(syntax, value))) { | |
| t = syntax[value] || syntax['(error)']; | |
| } else { | |
| t = syntax[type]; | |
| } | |
| t = Object.create(t); | |
| if (type === '(string)' || type === '(range)') { | |
| if (jx.test(value)) { | |
| warningAt("Script URL.", line, from); | |
| } | |
| } | |
| if (type === '(identifier)') { | |
| t.identifier = true; | |
| if (value === '__iterator__' || value === '__proto__') { | |
| errorAt("Reserved name '{a}'.", | |
| line, from, value); | |
| } else if (option.nomen && | |
| (value.charAt(0) === '_' || | |
| value.charAt(value.length - 1) === '_')) { | |
| warningAt("Unexpected {a} in '{b}'.", line, from, | |
| "dangling '_'", value); | |
| } | |
| } | |
| t.value = value; | |
| t.line = line; | |
| t.character = character; | |
| t.from = from; | |
| i = t.id; | |
| if (i !== '(endline)') { | |
| prereg = i && | |
| (('(,=:[!&|?{};'.indexOf(i.charAt(i.length - 1)) >= 0) || | |
| i === 'return'); | |
| } | |
| return t; | |
| } | |
| // Public lex methods | |
| return { | |
| init: function (source) { | |
| if (typeof source === 'string') { | |
| lines = source | |
| .replace(/\r\n/g, '\n') | |
| .replace(/\r/g, '\n') | |
| .split('\n'); | |
| } else { | |
| lines = source; | |
| } | |
| // If the first line is a shebang (#!), make it a blank and move on. | |
| // Shebangs are used by Node scripts. | |
| if (lines[0] && lines[0].substr(0, 2) == '#!') | |
| lines[0] = ''; | |
| line = 0; | |
| nextLine(); | |
| from = 1; | |
| }, | |
| range: function (begin, end) { | |
| var c, value = ''; | |
| from = character; | |
| if (s.charAt(0) !== begin) { | |
| errorAt("Expected '{a}' and instead saw '{b}'.", | |
| line, character, begin, s.charAt(0)); | |
| } | |
| for (;;) { | |
| s = s.slice(1); | |
| character += 1; | |
| c = s.charAt(0); | |
| switch (c) { | |
| case '': | |
| errorAt("Missing '{a}'.", line, character, c); | |
| break; | |
| case end: | |
| s = s.slice(1); | |
| character += 1; | |
| return it('(range)', value); | |
| case '\\': | |
| warningAt("Unexpected '{a}'.", line, character, c); | |
| } | |
| value += c; | |
| } | |
| }, | |
| // token -- this is called by advance to get the next token. | |
| token: function () { | |
| var b, c, captures, d, depth, high, i, l, low, q, t; | |
| function match(x) { | |
| var r = x.exec(s), r1; | |
| if (r) { | |
| l = r[0].length; | |
| r1 = r[1]; | |
| c = r1.charAt(0); | |
| s = s.substr(l); | |
| from = character + l - r1.length; | |
| character += l; | |
| return r1; | |
| } | |
| } | |
| function string(x) { | |
| var c, j, r = ''; | |
| if (jsonmode && x !== '"') { | |
| warningAt("Strings must use doublequote.", | |
| line, character); | |
| } | |
| function esc(n) { | |
| var i = parseInt(s.substr(j + 1, n), 16); | |
| j += n; | |
| if (i >= 32 && i <= 126 && | |
| i !== 34 && i !== 92 && i !== 39) { | |
| warningAt("Unnecessary escapement.", line, character); | |
| } | |
| character += n; | |
| c = String.fromCharCode(i); | |
| } | |
| j = 0; | |
| for (;;) { | |
| while (j >= s.length) { | |
| j = 0; | |
| if (!nextLine()) { | |
| errorAt("Unclosed string.", line, from); | |
| } | |
| } | |
| c = s.charAt(j); | |
| if (c === x) { | |
| character += 1; | |
| s = s.substr(j + 1); | |
| return it('(string)', r, x); | |
| } | |
| if (c < ' ') { | |
| if (c === '\n' || c === '\r') { | |
| break; | |
| } | |
| warningAt("Control character in string: {a}.", | |
| line, character + j, s.slice(0, j)); | |
| } else if (c === '\\') { | |
| j += 1; | |
| character += 1; | |
| c = s.charAt(j); | |
| switch (c) { | |
| case '\\': | |
| case '"': | |
| case '/': | |
| break; | |
| case '\'': | |
| if (jsonmode) { | |
| warningAt("Avoid \\'.", line, character); | |
| } | |
| break; | |
| case 'b': | |
| c = '\b'; | |
| break; | |
| case 'f': | |
| c = '\f'; | |
| break; | |
| case 'n': | |
| c = '\n'; | |
| break; | |
| case 'r': | |
| c = '\r'; | |
| break; | |
| case 't': | |
| c = '\t'; | |
| break; | |
| case 'u': | |
| esc(4); | |
| break; | |
| case 'v': | |
| if (jsonmode) { | |
| warningAt("Avoid \\v.", line, character); | |
| } | |
| c = '\v'; | |
| break; | |
| case 'x': | |
| if (jsonmode) { | |
| warningAt("Avoid \\x-.", line, character); | |
| } | |
| esc(2); | |
| break; | |
| default: | |
| warningAt("Bad escapement.", line, character); | |
| } | |
| } | |
| r += c; | |
| character += 1; | |
| j += 1; | |
| } | |
| } | |
| for (;;) { | |
| if (!s) { | |
| return it(nextLine() ? '(endline)' : '(end)', ''); | |
| } | |
| t = match(tx); | |
| if (!t) { | |
| t = ''; | |
| c = ''; | |
| while (s && s < '!') { | |
| s = s.substr(1); | |
| } | |
| if (s) { | |
| errorAt("Unexpected '{a}'.", line, character, s.substr(0, 1)); | |
| } | |
| } else { | |
| // identifier | |
| if (c.isAlpha() || c === '_' || c === '$') { | |
| return it('(identifier)', t); | |
| } | |
| // number | |
| if (c.isDigit()) { | |
| if (!isFinite(Number(t))) { | |
| warningAt("Bad number '{a}'.", | |
| line, character, t); | |
| } | |
| if (s.substr(0, 1).isAlpha()) { | |
| warningAt("Missing space after '{a}'.", | |
| line, character, t); | |
| } | |
| if (c === '0') { | |
| d = t.substr(1, 1); | |
| if (d.isDigit()) { | |
| if (token.id !== '.') { | |
| warningAt("Don't use extra leading zeros '{a}'.", | |
| line, character, t); | |
| } | |
| } else if (jsonmode && (d === 'x' || d === 'X')) { | |
| warningAt("Avoid 0x-. '{a}'.", | |
| line, character, t); | |
| } | |
| } | |
| if (t.substr(t.length - 1) === '.') { | |
| warningAt( | |
| "A trailing decimal point can be confused with a dot '{a}'.", line, character, t); | |
| } | |
| return it('(number)', t); | |
| } | |
| switch (t) { | |
| // string | |
| case '"': | |
| case "'": | |
| return string(t); | |
| // // comment | |
| case '//': | |
| if (src) { | |
| warningAt("Unexpected comment.", line, character); | |
| } | |
| s = ''; | |
| token.comment = true; | |
| break; | |
| // /* comment | |
| case '/*': | |
| if (src) { | |
| warningAt("Unexpected comment.", line, character); | |
| } | |
| for (;;) { | |
| i = s.search(lx); | |
| if (i >= 0) { | |
| break; | |
| } | |
| if (!nextLine()) { | |
| errorAt("Unclosed comment.", line, character); | |
| } | |
| } | |
| character += i + 2; | |
| if (s.substr(i, 1) === '/') { | |
| errorAt("Nested comment.", line, character); | |
| } | |
| s = s.substr(i + 2); | |
| token.comment = true; | |
| break; | |
| // /*members /*jshint /*global | |
| case '/*members': | |
| case '/*member': | |
| case '/*jshint': | |
| case '/*jslint': | |
| case '/*global': | |
| case '*/': | |
| return { | |
| value: t, | |
| type: 'special', | |
| line: line, | |
| character: character, | |
| from: from | |
| }; | |
| case '': | |
| break; | |
| // / | |
| case '/': | |
| if (token.id === '/=') { | |
| errorAt( | |
| "A regular expression literal can be confused with '/='.", line, from); | |
| } | |
| if (prereg) { | |
| depth = 0; | |
| captures = 0; | |
| l = 0; | |
| for (;;) { | |
| b = true; | |
| c = s.charAt(l); | |
| l += 1; | |
| switch (c) { | |
| case '': | |
| errorAt("Unclosed regular expression.", | |
| line, from); | |
| return; | |
| case '/': | |
| if (depth > 0) { | |
| warningAt("Unescaped '{a}'.", | |
| line, from + l, '/'); | |
| } | |
| c = s.substr(0, l - 1); | |
| q = { | |
| g: true, | |
| i: true, | |
| m: true | |
| }; | |
| while (q[s.charAt(l)] === true) { | |
| q[s.charAt(l)] = false; | |
| l += 1; | |
| } | |
| character += l; | |
| s = s.substr(l); | |
| q = s.charAt(0); | |
| if (q === '/' || q === '*') { | |
| errorAt("Confusing regular expression.", | |
| line, from); | |
| } | |
| return it('(regexp)', c); | |
| case '\\': | |
| c = s.charAt(l); | |
| if (c < ' ') { | |
| warningAt( | |
| "Unexpected control character in regular expression.", line, from + l); | |
| } else if (c === '<') { | |
| warningAt( | |
| "Unexpected escaped character '{a}' in regular expression.", line, from + l, c); | |
| } | |
| l += 1; | |
| break; | |
| case '(': | |
| depth += 1; | |
| b = false; | |
| if (s.charAt(l) === '?') { | |
| l += 1; | |
| switch (s.charAt(l)) { | |
| case ':': | |
| case '=': | |
| case '!': | |
| l += 1; | |
| break; | |
| default: | |
| warningAt( | |
| "Expected '{a}' and instead saw '{b}'.", line, from + l, ':', s.charAt(l)); | |
| } | |
| } else { | |
| captures += 1; | |
| } | |
| break; | |
| case '|': | |
| b = false; | |
| break; | |
| case ')': | |
| if (depth === 0) { | |
| warningAt("Unescaped '{a}'.", | |
| line, from + l, ')'); | |
| } else { | |
| depth -= 1; | |
| } | |
| break; | |
| case ' ': | |
| q = 1; | |
| while (s.charAt(l) === ' ') { | |
| l += 1; | |
| q += 1; | |
| } | |
| if (q > 1) { | |
| warningAt( | |
| "Spaces are hard to count. Use {{a}}.", line, from + l, q); | |
| } | |
| break; | |
| case '[': | |
| c = s.charAt(l); | |
| if (c === '^') { | |
| l += 1; | |
| if (option.regexp) { | |
| warningAt("Insecure '{a}'.", | |
| line, from + l, c); | |
| } else if (s.charAt(l) === ']') { | |
| errorAt("Unescaped '{a}'.", | |
| line, from + l, '^'); | |
| } | |
| } | |
| q = false; | |
| if (c === ']') { | |
| warningAt("Empty class.", line, | |
| from + l - 1); | |
| q = true; | |
| } | |
| klass: do { | |
| c = s.charAt(l); | |
| l += 1; | |
| switch (c) { | |
| case '[': | |
| case '^': | |
| warningAt("Unescaped '{a}'.", | |
| line, from + l, c); | |
| q = true; | |
| break; | |
| case '-': | |
| if (q) { | |
| q = false; | |
| } else { | |
| warningAt("Unescaped '{a}'.", | |
| line, from + l, '-'); | |
| q = true; | |
| } | |
| break; | |
| case ']': | |
| if (!q) { | |
| warningAt("Unescaped '{a}'.", | |
| line, from + l - 1, '-'); | |
| } | |
| break klass; | |
| case '\\': | |
| c = s.charAt(l); | |
| if (c < ' ') { | |
| warningAt( | |
| "Unexpected control character in regular expression.", line, from + l); | |
| } else if (c === '<') { | |
| warningAt( | |
| "Unexpected escaped character '{a}' in regular expression.", line, from + l, c); | |
| } | |
| l += 1; | |
| q = true; | |
| break; | |
| case '/': | |
| warningAt("Unescaped '{a}'.", | |
| line, from + l - 1, '/'); | |
| q = true; | |
| break; | |
| case '<': | |
| q = true; | |
| break; | |
| default: | |
| q = true; | |
| } | |
| } while (c); | |
| break; | |
| case '.': | |
| if (option.regexp) { | |
| warningAt("Insecure '{a}'.", line, | |
| from + l, c); | |
| } | |
| break; | |
| case ']': | |
| case '?': | |
| case '{': | |
| case '}': | |
| case '+': | |
| case '*': | |
| warningAt("Unescaped '{a}'.", line, | |
| from + l, c); | |
| } | |
| if (b) { | |
| switch (s.charAt(l)) { | |
| case '?': | |
| case '+': | |
| case '*': | |
| l += 1; | |
| if (s.charAt(l) === '?') { | |
| l += 1; | |
| } | |
| break; | |
| case '{': | |
| l += 1; | |
| c = s.charAt(l); | |
| if (c < '0' || c > '9') { | |
| warningAt( | |
| "Expected a number and instead saw '{a}'.", line, from + l, c); | |
| } | |
| l += 1; | |
| low = +c; | |
| for (;;) { | |
| c = s.charAt(l); | |
| if (c < '0' || c > '9') { | |
| break; | |
| } | |
| l += 1; | |
| low = +c + (low * 10); | |
| } | |
| high = low; | |
| if (c === ',') { | |
| l += 1; | |
| high = Infinity; | |
| c = s.charAt(l); | |
| if (c >= '0' && c <= '9') { | |
| l += 1; | |
| high = +c; | |
| for (;;) { | |
| c = s.charAt(l); | |
| if (c < '0' || c > '9') { | |
| break; | |
| } | |
| l += 1; | |
| high = +c + (high * 10); | |
| } | |
| } | |
| } | |
| if (s.charAt(l) !== '}') { | |
| warningAt( | |
| "Expected '{a}' and instead saw '{b}'.", line, from + l, '}', c); | |
| } else { | |
| l += 1; | |
| } | |
| if (s.charAt(l) === '?') { | |
| l += 1; | |
| } | |
| if (low > high) { | |
| warningAt( | |
| "'{a}' should not be greater than '{b}'.", line, from + l, low, high); | |
| } | |
| } | |
| } | |
| } | |
| c = s.substr(0, l - 1); | |
| character += l; | |
| s = s.substr(l); | |
| return it('(regexp)', c); | |
| } | |
| return it('(punctuator)', t); | |
| // punctuator | |
| case '#': | |
| return it('(punctuator)', t); | |
| default: | |
| return it('(punctuator)', t); | |
| } | |
| } | |
| } | |
| } | |
| }; | |
| }()); | |
| function addlabel(t, type) { | |
| if (t === 'hasOwnProperty') { | |
| warning("'hasOwnProperty' is a really bad name."); | |
| } | |
| // Define t in the current function in the current scope. | |
| if (is_own(funct, t) && !funct['(global)']) { | |
| if (funct[t] === true) { | |
| if (option.latedef) | |
| warning("'{a}' was used before it was defined.", nexttoken, t); | |
| } else { | |
| if (!option.shadow) | |
| warning("'{a}' is already defined.", nexttoken, t); | |
| } | |
| } | |
| funct[t] = type; | |
| if (funct['(global)']) { | |
| global[t] = funct; | |
| if (is_own(implied, t)) { | |
| if (option.latedef) | |
| warning("'{a}' was used before it was defined.", nexttoken, t); | |
| delete implied[t]; | |
| } | |
| } else { | |
| scope[t] = funct; | |
| } | |
| } | |
| function doOption() { | |
| var b, obj, filter, o = nexttoken.value, t, v; | |
| switch (o) { | |
| case '*/': | |
| error("Unbegun comment."); | |
| break; | |
| case '/*members': | |
| case '/*member': | |
| o = '/*members'; | |
| if (!membersOnly) { | |
| membersOnly = {}; | |
| } | |
| obj = membersOnly; | |
| break; | |
| case '/*jshint': | |
| case '/*jslint': | |
| obj = option; | |
| filter = boolOptions; | |
| break; | |
| case '/*global': | |
| obj = predefined; | |
| break; | |
| default: | |
| error("What?"); | |
| } | |
| t = lex.token(); | |
| loop: for (;;) { | |
| for (;;) { | |
| if (t.type === 'special' && t.value === '*/') { | |
| break loop; | |
| } | |
| if (t.id !== '(endline)' && t.id !== ',') { | |
| break; | |
| } | |
| t = lex.token(); | |
| } | |
| if (t.type !== '(string)' && t.type !== '(identifier)' && | |
| o !== '/*members') { | |
| error("Bad option.", t); | |
| } | |
| v = lex.token(); | |
| if (v.id === ':') { | |
| v = lex.token(); | |
| if (obj === membersOnly) { | |
| error("Expected '{a}' and instead saw '{b}'.", | |
| t, '*/', ':'); | |
| } | |
| if (t.value === 'indent' && (o === '/*jshint' || o === '/*jslint')) { | |
| b = +v.value; | |
| if (typeof b !== 'number' || !isFinite(b) || b <= 0 || | |
| Math.floor(b) !== b) { | |
| error("Expected a small integer and instead saw '{a}'.", | |
| v, v.value); | |
| } | |
| obj.white = true; | |
| obj.indent = b; | |
| } else if (t.value === 'maxerr' && (o === '/*jshint' || o === '/*jslint')) { | |
| b = +v.value; | |
| if (typeof b !== 'number' || !isFinite(b) || b <= 0 || | |
| Math.floor(b) !== b) { | |
| error("Expected a small integer and instead saw '{a}'.", | |
| v, v.value); | |
| } | |
| obj.maxerr = b; | |
| } else if (t.value === 'maxlen' && (o === '/*jshint' || o === '/*jslint')) { | |
| b = +v.value; | |
| if (typeof b !== 'number' || !isFinite(b) || b <= 0 || | |
| Math.floor(b) !== b) { | |
| error("Expected a small integer and instead saw '{a}'.", | |
| v, v.value); | |
| } | |
| obj.maxlen = b; | |
| } else if (v.value === 'true') { | |
| obj[t.value] = true; | |
| } else if (v.value === 'false') { | |
| obj[t.value] = false; | |
| } else { | |
| error("Bad option value.", v); | |
| } | |
| t = lex.token(); | |
| } else { | |
| if (o === '/*jshint' || o === '/*jslint') { | |
| error("Missing option value.", t); | |
| } | |
| obj[t.value] = false; | |
| t = v; | |
| } | |
| } | |
| if (filter) { | |
| assume(); | |
| } | |
| } | |
| // We need a peek function. If it has an argument, it peeks that much farther | |
| // ahead. It is used to distinguish | |
| // for ( var i in ... | |
| // from | |
| // for ( var i = ... | |
| function peek(p) { | |
| var i = p || 0, j = 0, t; | |
| while (j <= i) { | |
| t = lookahead[j]; | |
| if (!t) { | |
| t = lookahead[j] = lex.token(); | |
| } | |
| j += 1; | |
| } | |
| return t; | |
| } | |
| // Produce the next token. It looks for programming errors. | |
| function advance(id, t) { | |
| switch (token.id) { | |
| case '(number)': | |
| if (nexttoken.id === '.') { | |
| warning("A dot following a number can be confused with a decimal point.", token); | |
| } | |
| break; | |
| case '-': | |
| if (nexttoken.id === '-' || nexttoken.id === '--') { | |
| warning("Confusing minusses."); | |
| } | |
| break; | |
| case '+': | |
| if (nexttoken.id === '+' || nexttoken.id === '++') { | |
| warning("Confusing plusses."); | |
| } | |
| break; | |
| } | |
| if (token.type === '(string)' || token.identifier) { | |
| anonname = token.value; | |
| } | |
| if (id && nexttoken.id !== id) { | |
| if (t) { | |
| if (nexttoken.id === '(end)') { | |
| warning("Unmatched '{a}'.", t, t.id); | |
| } else { | |
| warning("Expected '{a}' to match '{b}' from line {c} and instead saw '{d}'.", | |
| nexttoken, id, t.id, t.line, nexttoken.value); | |
| } | |
| } else if (nexttoken.type !== '(identifier)' || | |
| nexttoken.value !== id) { | |
| warning("Expected '{a}' and instead saw '{b}'.", | |
| nexttoken, id, nexttoken.value); | |
| } | |
| } | |
| prevtoken = token; | |
| token = nexttoken; | |
| for (;;) { | |
| nexttoken = lookahead.shift() || lex.token(); | |
| if (nexttoken.id === '(end)' || nexttoken.id === '(error)') { | |
| return; | |
| } | |
| if (nexttoken.type === 'special') { | |
| doOption(); | |
| } else { | |
| if (nexttoken.id !== '(endline)') { | |
| break; | |
| } | |
| } | |
| } | |
| } | |
| // This is the heart of JSHINT, the Pratt parser. In addition to parsing, it | |
| // is looking for ad hoc lint patterns. We add .fud to Pratt's model, which is | |
| // like .nud except that it is only used on the first token of a statement. | |
| // Having .fud makes it much easier to define statement-oriented languages like | |
| // JavaScript. I retained Pratt's nomenclature. | |
| // .nud Null denotation | |
| // .fud First null denotation | |
| // .led Left denotation | |
| // lbp Left binding power | |
| // rbp Right binding power | |
| // They are elements of the parsing method called Top Down Operator Precedence. | |
| function expression(rbp, initial) { | |
| var left, isArray = false; | |
| if (nexttoken.id === '(end)') | |
| error("Unexpected early end of program.", token); | |
| advance(); | |
| if (initial) { | |
| anonname = 'anonymous'; | |
| funct['(verb)'] = token.value; | |
| } | |
| if (initial === true && token.fud) { | |
| left = token.fud(); | |
| } else { | |
| if (token.nud) { | |
| left = token.nud(); | |
| } else { | |
| if (nexttoken.type === '(number)' && token.id === '.') { | |
| warning("A leading decimal point can be confused with a dot: '.{a}'.", | |
| token, nexttoken.value); | |
| advance(); | |
| return token; | |
| } else { | |
| error("Expected an identifier and instead saw '{a}'.", | |
| token, token.id); | |
| } | |
| } | |
| while (rbp < nexttoken.lbp) { | |
| isArray = token.value == 'Array'; | |
| advance(); | |
| if (isArray && token.id == '(' && nexttoken.id == ')') | |
| warning("Use the array literal notation [].", token); | |
| if (token.led) { | |
| left = token.led(left); | |
| } else { | |
| error("Expected an operator and instead saw '{a}'.", | |
| token, token.id); | |
| } | |
| } | |
| } | |
| return left; | |
| } | |
| // Functions for conformance of style. | |
| function adjacent(left, right) { | |
| left = left || token; | |
| right = right || nexttoken; | |
| if (option.white) { | |
| if (left.character !== right.from && left.line === right.line) { | |
| warning("Unexpected space after '{a}'.", right, left.value); | |
| } | |
| } | |
| } | |
| function nobreak(left, right) { | |
| left = left || token; | |
| right = right || nexttoken; | |
| if (option.white && (left.character !== right.from || left.line !== right.line)) { | |
| warning("Unexpected space before '{a}'.", right, right.value); | |
| } | |
| } | |
| function nospace(left, right) { | |
| left = left || token; | |
| right = right || nexttoken; | |
| if (option.white && !left.comment) { | |
| if (left.line === right.line) { | |
| adjacent(left, right); | |
| } | |
| } | |
| } | |
| function nonadjacent(left, right) { | |
| if (option.white) { | |
| left = left || token; | |
| right = right || nexttoken; | |
| if (left.line === right.line && left.character === right.from) { | |
| warning("Missing space after '{a}'.", | |
| nexttoken, left.value); | |
| } | |
| } | |
| } | |
| function nobreaknonadjacent(left, right) { | |
| left = left || token; | |
| right = right || nexttoken; | |
| if (!option.laxbreak && left.line !== right.line) { | |
| warning("Bad line breaking before '{a}'.", right, right.id); | |
| } else if (option.white) { | |
| left = left || token; | |
| right = right || nexttoken; | |
| if (left.character === right.from) { | |
| warning("Missing space after '{a}'.", | |
| nexttoken, left.value); | |
| } | |
| } | |
| } | |
| function indentation(bias) { | |
| var i; | |
| if (option.white && nexttoken.id !== '(end)') { | |
| i = indent + (bias || 0); | |
| if (nexttoken.from !== i) { | |
| warning( | |
| "Expected '{a}' to have an indentation at {b} instead at {c}.", | |
| nexttoken, nexttoken.value, i, nexttoken.from); | |
| } | |
| } | |
| } | |
| function nolinebreak(t) { | |
| t = t || token; | |
| if (t.line !== nexttoken.line) { | |
| warning("Line breaking error '{a}'.", t, t.value); | |
| } | |
| } | |
| function comma() { | |
| if (token.line !== nexttoken.line) { | |
| if (!option.laxbreak) { | |
| warning("Bad line breaking before '{a}'.", token, nexttoken.id); | |
| } | |
| } else if (token.character !== nexttoken.from && option.white) { | |
| warning("Unexpected space after '{a}'.", nexttoken, token.value); | |
| } | |
| advance(','); | |
| nonadjacent(token, nexttoken); | |
| } | |
| // Functional constructors for making the symbols that will be inherited by | |
| // tokens. | |
| function symbol(s, p) { | |
| var x = syntax[s]; | |
| if (!x || typeof x !== 'object') { | |
| syntax[s] = x = { | |
| id: s, | |
| lbp: p, | |
| value: s | |
| }; | |
| } | |
| return x; | |
| } | |
| function delim(s) { | |
| return symbol(s, 0); | |
| } | |
| function stmt(s, f) { | |
| var x = delim(s); | |
| x.identifier = x.reserved = true; | |
| x.fud = f; | |
| return x; | |
| } | |
| function blockstmt(s, f) { | |
| var x = stmt(s, f); | |
| x.block = true; | |
| return x; | |
| } | |
| function reserveName(x) { | |
| var c = x.id.charAt(0); | |
| if ((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z')) { | |
| x.identifier = x.reserved = true; | |
| } | |
| return x; | |
| } | |
| function prefix(s, f) { | |
| var x = symbol(s, 150); | |
| reserveName(x); | |
| x.nud = (typeof f === 'function') ? f : function () { | |
| this.right = expression(150); | |
| this.arity = 'unary'; | |
| if (this.id === '++' || this.id === '--') { | |
| if (option.plusplus) { | |
| warning("Unexpected use of '{a}'.", this, this.id); | |
| } else if ((!this.right.identifier || this.right.reserved) && | |
| this.right.id !== '.' && this.right.id !== '[') { | |
| warning("Bad operand.", this); | |
| } | |
| } | |
| return this; | |
| }; | |
| return x; | |
| } | |
| function type(s, f) { | |
| var x = delim(s); | |
| x.type = s; | |
| x.nud = f; | |
| return x; | |
| } | |
| function reserve(s, f) { | |
| var x = type(s, f); | |
| x.identifier = x.reserved = true; | |
| return x; | |
| } | |
| function reservevar(s, v) { | |
| return reserve(s, function () { | |
| if (typeof v === 'function') { | |
| v(this); | |
| } | |
| return this; | |
| }); | |
| } | |
| function infix(s, f, p, w) { | |
| var x = symbol(s, p); | |
| reserveName(x); | |
| x.led = function (left) { | |
| if (!w) { | |
| nobreaknonadjacent(prevtoken, token); | |
| nonadjacent(token, nexttoken); | |
| } | |
| if (typeof f === 'function') { | |
| return f(left, this); | |
| } else { | |
| this.left = left; | |
| this.right = expression(p); | |
| return this; | |
| } | |
| }; | |
| return x; | |
| } | |
| function relation(s, f) { | |
| var x = symbol(s, 100); | |
| x.led = function (left) { | |
| nobreaknonadjacent(prevtoken, token); | |
| nonadjacent(token, nexttoken); | |
| var right = expression(100); | |
| if ((left && left.id === 'NaN') || (right && right.id === 'NaN')) { | |
| warning("Use the isNaN function to compare with NaN.", this); | |
| } else if (f) { | |
| f.apply(this, [left, right]); | |
| } | |
| if (left.id === '!') { | |
| warning("Confusing use of '{a}'.", left, '!'); | |
| } | |
| if (right.id === '!') { | |
| warning("Confusing use of '{a}'.", left, '!'); | |
| } | |
| this.left = left; | |
| this.right = right; | |
| return this; | |
| }; | |
| return x; | |
| } | |
| function isPoorRelation(node) { | |
| return node && | |
| ((node.type === '(number)' && +node.value === 0) || | |
| (node.type === '(string)' && node.value === '') || | |
| (node.type === 'null' && !option.eqnull) || | |
| node.type === 'true' || | |
| node.type === 'false' || | |
| node.type === 'undefined'); | |
| } | |
| function assignop(s, f) { | |
| symbol(s, 20).exps = true; | |
| return infix(s, function (left, that) { | |
| var l; | |
| that.left = left; | |
| if (predefined[left.value] === false && | |
| scope[left.value]['(global)'] === true) { | |
| warning("Read only.", left); | |
| } else if (left['function']) { | |
| warning("'{a}' is a function.", left, left.value); | |
| } | |
| if (left) { | |
| if (left.id === '.' || left.id === '[') { | |
| if (!left.left || left.left.value === 'arguments') { | |
| warning('Bad assignment.', that); | |
| } | |
| that.right = expression(19); | |
| return that; | |
| } else if (left.identifier && !left.reserved) { | |
| if (funct[left.value] === 'exception') { | |
| warning("Do not assign to the exception parameter.", left); | |
| } | |
| that.right = expression(19); | |
| return that; | |
| } | |
| if (left === syntax['function']) { | |
| warning( | |
| "Expected an identifier in an assignment and instead saw a function invocation.", | |
| token); | |
| } | |
| } | |
| error("Bad assignment.", that); | |
| }, 20); | |
| } | |
| function bitwise(s, f, p) { | |
| var x = symbol(s, p); | |
| reserveName(x); | |
| x.led = (typeof f === 'function') ? f : function (left) { | |
| if (option.bitwise) { | |
| warning("Unexpected use of '{a}'.", this, this.id); | |
| } | |
| this.left = left; | |
| this.right = expression(p); | |
| return this; | |
| }; | |
| return x; | |
| } | |
| function bitwiseassignop(s) { | |
| symbol(s, 20).exps = true; | |
| return infix(s, function (left, that) { | |
| if (option.bitwise) { | |
| warning("Unexpected use of '{a}'.", that, that.id); | |
| } | |
| nonadjacent(prevtoken, token); | |
| nonadjacent(token, nexttoken); | |
| if (left) { | |
| if (left.id === '.' || left.id === '[' || | |
| (left.identifier && !left.reserved)) { | |
| expression(19); | |
| return that; | |
| } | |
| if (left === syntax['function']) { | |
| warning( | |
| "Expected an identifier in an assignment, and instead saw a function invocation.", | |
| token); | |
| } | |
| return that; | |
| } | |
| error("Bad assignment.", that); | |
| }, 20); | |
| } | |
| function suffix(s, f) { | |
| var x = symbol(s, 150); | |
| x.led = function (left) { | |
| if (option.plusplus) { | |
| warning("Unexpected use of '{a}'.", this, this.id); | |
| } else if ((!left.identifier || left.reserved) && | |
| left.id !== '.' && left.id !== '[') { | |
| warning("Bad operand.", this); | |
| } | |
| this.left = left; | |
| return this; | |
| }; | |
| return x; | |
| } | |
| // fnparam means that this identifier is being defined as a function | |
| // argument (see identifier()) | |
| function optionalidentifier(fnparam) { | |
| if (nexttoken.identifier) { | |
| advance(); | |
| if (token.reserved && !option.es5) { | |
| // `undefined` as a function param is a common pattern to protect | |
| // against the case when somebody does `undefined = true` and | |
| // help with minification. More info: https://gist.github.com/315916 | |
| if (!fnparam || token.value != 'undefined') { | |
| warning("Expected an identifier and instead saw '{a}' (a reserved word).", | |
| token, token.id); | |
| } | |
| } | |
| return token.value; | |
| } | |
| } | |
| // fnparam means that this identifier is being defined as a function | |
| // argument | |
| function identifier(fnparam) { | |
| var i = optionalidentifier(fnparam); | |
| if (i) { | |
| return i; | |
| } | |
| if (token.id === 'function' && nexttoken.id === '(') { | |
| warning("Missing name in function declaration."); | |
| } else { | |
| error("Expected an identifier and instead saw '{a}'.", | |
| nexttoken, nexttoken.value); | |
| } | |
| } | |
| function reachable(s) { | |
| var i = 0, t; | |
| if (nexttoken.id !== ';' || noreach) { | |
| return; | |
| } | |
| for (;;) { | |
| t = peek(i); | |
| if (t.reach) { | |
| return; | |
| } | |
| if (t.id !== '(endline)') { | |
| if (t.id === 'function') { | |
| warning( | |
| "Inner functions should be listed at the top of the outer function.", t); | |
| break; | |
| } | |
| warning("Unreachable '{a}' after '{b}'.", t, t.value, s); | |
| break; | |
| } | |
| i += 1; | |
| } | |
| } | |
| function statement(noindent) { | |
| var i = indent, r, s = scope, t = nexttoken; | |
| // We don't like the empty statement. | |
| if (t.id === ';') { | |
| warning("Unnecessary semicolon.", t); | |
| advance(';'); | |
| return; | |
| } | |
| // Is this a labelled statement? | |
| if (t.identifier && !t.reserved && peek().id === ':') { | |
| advance(); | |
| advance(':'); | |
| scope = Object.create(s); | |
| addlabel(t.value, 'label'); | |
| if (!nexttoken.labelled) { | |
| warning("Label '{a}' on {b} statement.", | |
| nexttoken, t.value, nexttoken.value); | |
| } | |
| if (jx.test(t.value + ':')) { | |
| warning("Label '{a}' looks like a javascript url.", | |
| t, t.value); | |
| } | |
| nexttoken.label = t.value; | |
| t = nexttoken; | |
| } | |
| // Parse the statement. | |
| if (!noindent) { | |
| indentation(); | |
| } | |
| r = expression(0, true); | |
| // Look for the final semicolon. | |
| if (!t.block) { | |
| if (!option.expr && (!r || !r.exps)) { | |
| warning("Expected an assignment or function call and instead saw an expression.", token); | |
| } else if (option.nonew && r.id === '(' && r.left.id === 'new') { | |
| warning("Do not use 'new' for side effects."); | |
| } | |
| if (nexttoken.id !== ';') { | |
| if (!option.asi) { | |
| warningAt("Missing semicolon.", token.line, token.from + token.value.length); | |
| } | |
| } else { | |
| adjacent(token, nexttoken); | |
| advance(';'); | |
| nonadjacent(token, nexttoken); | |
| } | |
| } | |
| // Restore the indentation. | |
| indent = i; | |
| scope = s; | |
| return r; | |
| } | |
| function use_strict() { | |
| if (nexttoken.value === 'use strict') { | |
| if (strict_mode) { | |
| warning("Unnecessary \"use strict\"."); | |
| } | |
| advance(); | |
| advance(';'); | |
| strict_mode = true; | |
| option.newcap = true; | |
| option.undef = true; | |
| return true; | |
| } else { | |
| return false; | |
| } | |
| } | |
| function statements(begin) { | |
| var a = [], f, p; | |
| while (!nexttoken.reach && nexttoken.id !== '(end)') { | |
| if (nexttoken.id === ';') { | |
| warning("Unnecessary semicolon."); | |
| advance(';'); | |
| } else { | |
| a.push(statement()); | |
| } | |
| } | |
| return a; | |
| } | |
| /* | |
| * Parses a single block. A block is a sequence of statements wrapped in | |
| * braces. | |
| * | |
| * ordinary - true for everything but function bodies and try blocks. | |
| * stmt - true if block can be a single statement (e.g. in if/for/while). | |
| */ | |
| function block(ordinary, stmt) { | |
| var a, | |
| b = inblock, | |
| old_indent = indent, | |
| m = strict_mode, | |
| s = scope, | |
| t; | |
| inblock = ordinary; | |
| scope = Object.create(scope); | |
| nonadjacent(token, nexttoken); | |
| t = nexttoken; | |
| if (nexttoken.id === '{') { | |
| advance('{'); | |
| if (nexttoken.id !== '}' || token.line !== nexttoken.line) { | |
| indent += option.indent; | |
| while (!ordinary && nexttoken.from > indent) { | |
| indent += option.indent; | |
| } | |
| if (!ordinary && !use_strict() && !m && option.strict && | |
| funct['(context)']['(global)']) { | |
| warning("Missing \"use strict\" statement."); | |
| } | |
| a = statements(); | |
| strict_mode = m; | |
| indent -= option.indent; | |
| indentation(); | |
| } | |
| advance('}', t); | |
| indent = old_indent; | |
| } else if (!ordinary) { | |
| error("Expected '{a}' and instead saw '{b}'.", | |
| nexttoken, '{', nexttoken.value); | |
| } else { | |
| if (!stmt || option.curly) | |
| warning("Expected '{a}' and instead saw '{b}'.", | |
| nexttoken, '{', nexttoken.value); | |
| noreach = true; | |
| a = [statement()]; | |
| noreach = false; | |
| } | |
| funct['(verb)'] = null; | |
| scope = s; | |
| inblock = b; | |
| if (ordinary && option.noempty && (!a || a.length === 0)) { | |
| warning("Empty block."); | |
| } | |
| return a; | |
| } | |
| function countMember(m) { | |
| if (membersOnly && typeof membersOnly[m] !== 'boolean') { | |
| warning("Unexpected /*member '{a}'.", token, m); | |
| } | |
| if (typeof member[m] === 'number') { | |
| member[m] += 1; | |
| } else { | |
| member[m] = 1; | |
| } | |
| } | |
| function note_implied(token) { | |
| var name = token.value, line = token.line, a = implied[name]; | |
| if (typeof a === 'function') { | |
| a = false; | |
| } | |
| if (!a) { | |
| a = [line]; | |
| implied[name] = a; | |
| } else if (a[a.length - 1] !== line) { | |
| a.push(line); | |
| } | |
| } | |
| // Build the syntax table by declaring the syntactic elements of the language. | |
| type('(number)', function () { | |
| return this; | |
| }); | |
| type('(string)', function () { | |
| return this; | |
| }); | |
| syntax['(identifier)'] = { | |
| type: '(identifier)', | |
| lbp: 0, | |
| identifier: true, | |
| nud: function () { | |
| var v = this.value, | |
| s = scope[v], | |
| f; | |
| if (typeof s === 'function') { | |
| // Protection against accidental inheritance. | |
| s = undefined; | |
| } else if (typeof s === 'boolean') { | |
| f = funct; | |
| funct = functions[0]; | |
| addlabel(v, 'var'); | |
| s = funct; | |
| funct = f; | |
| } | |
| // The name is in scope and defined in the current function. | |
| if (funct === s) { | |
| // Change 'unused' to 'var', and reject labels. | |
| switch (funct[v]) { | |
| case 'unused': | |
| funct[v] = 'var'; | |
| break; | |
| case 'unction': | |
| funct[v] = 'function'; | |
| this['function'] = true; | |
| break; | |
| case 'function': | |
| this['function'] = true; | |
| break; | |
| case 'label': | |
| warning("'{a}' is a statement label.", token, v); | |
| break; | |
| } | |
| // The name is not defined in the function. If we are in the global scope, | |
| // then we have an undefined variable. | |
| // | |
| // Operators typeof and delete do not raise runtime errors even if the base | |
| // object of a reference is null so no need to display warning if we're | |
| // inside of typeof or delete. | |
| } else if (funct['(global)']) { | |
| if (anonname != 'typeof' && anonname != 'delete' && | |
| option.undef && typeof predefined[v] !== 'boolean') { | |
| warning("'{a}' is not defined.", token, v); | |
| } | |
| note_implied(token); | |
| // If the name is already defined in the current | |
| // function, but not as outer, then there is a scope error. | |
| } else { | |
| switch (funct[v]) { | |
| case 'closure': | |
| case 'function': | |
| case 'var': | |
| case 'unused': | |
| warning("'{a}' used out of scope.", token, v); | |
| break; | |
| case 'label': | |
| warning("'{a}' is a statement label.", token, v); | |
| break; | |
| case 'outer': | |
| case 'global': | |
| break; | |
| default: | |
| // If the name is defined in an outer function, make an outer entry, and if | |
| // it was unused, make it var. | |
| if (s === true) { | |
| funct[v] = true; | |
| } else if (s === null) { | |
| warning("'{a}' is not allowed.", token, v); | |
| note_implied(token); | |
| } else if (typeof s !== 'object') { | |
| // Operators typeof and delete do not raise runtime errors even if the base object of | |
| // a reference is null so no need to display warning if we're inside of typeof or delete. | |
| if (anonname != 'typeof' && anonname != 'delete' && option.undef) { | |
| warning("'{a}' is not defined.", token, v); | |
| } else { | |
| funct[v] = true; | |
| } | |
| note_implied(token); | |
| } else { | |
| switch (s[v]) { | |
| case 'function': | |
| case 'unction': | |
| this['function'] = true; | |
| s[v] = 'closure'; | |
| funct[v] = s['(global)'] ? 'global' : 'outer'; | |
| break; | |
| case 'var': | |
| case 'unused': | |
| s[v] = 'closure'; | |
| funct[v] = s['(global)'] ? 'global' : 'outer'; | |
| break; | |
| case 'closure': | |
| case 'parameter': | |
| funct[v] = s['(global)'] ? 'global' : 'outer'; | |
| break; | |
| case 'label': | |
| warning("'{a}' is a statement label.", token, v); | |
| } | |
| } | |
| } | |
| } | |
| return this; | |
| }, | |
| led: function () { | |
| error("Expected an operator and instead saw '{a}'.", | |
| nexttoken, nexttoken.value); | |
| } | |
| }; | |
| type('(regexp)', function () { | |
| return this; | |
| }); | |
| // ECMAScript parser | |
| delim('(endline)'); | |
| delim('(begin)'); | |
| delim('(end)').reach = true; | |
| delim('</').reach = true; | |
| delim('<!'); | |
| delim('<!--'); | |
| delim('-->'); | |
| delim('(error)').reach = true; | |
| delim('}').reach = true; | |
| delim(')'); | |
| delim(']'); | |
| delim('"').reach = true; | |
| delim("'").reach = true; | |
| delim(';'); | |
| delim(':').reach = true; | |
| delim(','); | |
| delim('#'); | |
| delim('@'); | |
| reserve('else'); | |
| reserve('case').reach = true; | |
| reserve('catch'); | |
| reserve('default').reach = true; | |
| reserve('finally'); | |
| reservevar('arguments', function (x) { | |
| if (strict_mode && funct['(global)']) { | |
| warning("Strict violation.", x); | |
| } | |
| }); | |
| reservevar('eval'); | |
| reservevar('false'); | |
| reservevar('Infinity'); | |
| reservevar('NaN'); | |
| reservevar('null'); | |
| reservevar('this', function (x) { | |
| if (strict_mode && ((funct['(statement)'] && | |
| funct['(name)'].charAt(0) > 'Z') || funct['(global)'])) { | |
| warning("Strict violation.", x); | |
| } | |
| }); | |
| reservevar('true'); | |
| reservevar('undefined'); | |
| assignop('=', 'assign', 20); | |
| assignop('+=', 'assignadd', 20); | |
| assignop('-=', 'assignsub', 20); | |
| assignop('*=', 'assignmult', 20); | |
| assignop('/=', 'assigndiv', 20).nud = function () { | |
| error("A regular expression literal can be confused with '/='."); | |
| }; | |
| assignop('%=', 'assignmod', 20); | |
| bitwiseassignop('&=', 'assignbitand', 20); | |
| bitwiseassignop('|=', 'assignbitor', 20); | |
| bitwiseassignop('^=', 'assignbitxor', 20); | |
| bitwiseassignop('<<=', 'assignshiftleft', 20); | |
| bitwiseassignop('>>=', 'assignshiftright', 20); | |
| bitwiseassignop('>>>=', 'assignshiftrightunsigned', 20); | |
| infix('?', function (left, that) { | |
| that.left = left; | |
| that.right = expression(10); | |
| advance(':'); | |
| that['else'] = expression(10); | |
| return that; | |
| }, 30); | |
| infix('||', 'or', 40); | |
| infix('&&', 'and', 50); | |
| bitwise('|', 'bitor', 70); | |
| bitwise('^', 'bitxor', 80); | |
| bitwise('&', 'bitand', 90); | |
| relation('==', function (left, right) { | |
| var eqnull = option.eqnull && | |
| (left.value == 'null' || right.value == 'null'); | |
| if (!eqnull && option.eqeqeq) { | |
| warning("Expected '{a}' and instead saw '{b}'.", | |
| this, '===', '=='); | |
| } else if (isPoorRelation(left)) { | |
| warning("Use '{a}' to compare with '{b}'.", | |
| this, '===', left.value); | |
| } else if (isPoorRelation(right)) { | |
| warning("Use '{a}' to compare with '{b}'.", | |
| this, '===', right.value); | |
| } | |
| return this; | |
| }); | |
| relation('==='); | |
| relation('!=', function (left, right) { | |
| if (option.eqeqeq) { | |
| warning("Expected '{a}' and instead saw '{b}'.", | |
| this, '!==', '!='); | |
| } else if (isPoorRelation(left)) { | |
| warning("Use '{a}' to compare with '{b}'.", | |
| this, '!==', left.value); | |
| } else if (isPoorRelation(right)) { | |
| warning("Use '{a}' to compare with '{b}'.", | |
| this, '!==', right.value); | |
| } | |
| return this; | |
| }); | |
| relation('!=='); | |
| relation('<'); | |
| relation('>'); | |
| relation('<='); | |
| relation('>='); | |
| bitwise('<<', 'shiftleft', 120); | |
| bitwise('>>', 'shiftright', 120); | |
| bitwise('>>>', 'shiftrightunsigned', 120); | |
| infix('in', 'in', 120); | |
| infix('instanceof', 'instanceof', 120); | |
| infix('+', function (left, that) { | |
| var right = expression(130); | |
| if (left && right && left.id === '(string)' && right.id === '(string)') { | |
| left.value += right.value; | |
| left.character = right.character; | |
| if (jx.test(left.value)) { | |
| warning("JavaScript URL.", left); | |
| } | |
| return left; | |
| } | |
| that.left = left; | |
| that.right = right; | |
| return that; | |
| }, 130); | |
| prefix('+', 'num'); | |
| prefix('+++', function () { | |
| warning("Confusing pluses."); | |
| this.right = expression(150); | |
| this.arity = 'unary'; | |
| return this; | |
| }); | |
| infix('+++', function (left) { | |
| warning("Confusing pluses."); | |
| this.left = left; | |
| this.right = expression(130); | |
| return this; | |
| }, 130); | |
| infix('-', 'sub', 130); | |
| prefix('-', 'neg'); | |
| prefix('---', function () { | |
| warning("Confusing minuses."); | |
| this.right = expression(150); | |
| this.arity = 'unary'; | |
| return this; | |
| }); | |
| infix('---', function (left) { | |
| warning("Confusing minuses."); | |
| this.left = left; | |
| this.right = expression(130); | |
| return this; | |
| }, 130); | |
| infix('*', 'mult', 140); | |
| infix('/', 'div', 140); | |
| infix('%', 'mod', 140); | |
| suffix('++', 'postinc'); | |
| prefix('++', 'preinc'); | |
| syntax['++'].exps = true; | |
| suffix('--', 'postdec'); | |
| prefix('--', 'predec'); | |
| syntax['--'].exps = true; | |
| prefix('delete', function () { | |
| var p = expression(0); | |
| if (!p || (p.id !== '.' && p.id !== '[')) { | |
| warning("Variables should not be deleted."); | |
| } | |
| this.first = p; | |
| return this; | |
| }).exps = true; | |
| prefix('~', function () { | |
| if (option.bitwise) { | |
| warning("Unexpected '{a}'.", this, '~'); | |
| } | |
| expression(150); | |
| return this; | |
| }); | |
| prefix('!', function () { | |
| this.right = expression(150); | |
| this.arity = 'unary'; | |
| if (bang[this.right.id] === true) { | |
| warning("Confusing use of '{a}'.", this, '!'); | |
| } | |
| return this; | |
| }); | |
| prefix('typeof', 'typeof'); | |
| prefix('new', function () { | |
| var c = expression(155), i; | |
| if (c && c.id !== 'function') { | |
| if (c.identifier) { | |
| c['new'] = true; | |
| switch (c.value) { | |
| case 'Object': | |
| warning("Use the object literal notation {}.", token); | |
| break; | |
| case 'Number': | |
| case 'String': | |
| case 'Boolean': | |
| case 'Math': | |
| case 'JSON': | |
| warning("Do not use {a} as a constructor.", token, c.value); | |
| break; | |
| case 'Function': | |
| if (!option.evil) { | |
| warning("The Function constructor is eval."); | |
| } | |
| break; | |
| case 'Date': | |
| case 'RegExp': | |
| break; | |
| default: | |
| if (c.id !== 'function') { | |
| i = c.value.substr(0, 1); | |
| if (option.newcap && (i < 'A' || i > 'Z')) { | |
| warning("A constructor name should start with an uppercase letter.", token); | |
| } | |
| } | |
| } | |
| } else { | |
| if (c.id !== '.' && c.id !== '[' && c.id !== '(') { | |
| warning("Bad constructor.", token); | |
| } | |
| } | |
| } else { | |
| if (!option.supernew) | |
| warning("Weird construction. Delete 'new'.", this); | |
| } | |
| adjacent(token, nexttoken); | |
| if (nexttoken.id !== '(' && !option.supernew) { | |
| warning("Missing '()' invoking a constructor."); | |
| } | |
| this.first = c; | |
| return this; | |
| }); | |
| syntax['new'].exps = true; | |
| prefix('void').exps = true; | |
| infix('.', function (left, that) { | |
| adjacent(prevtoken, token); | |
| nobreak(); | |
| var m = identifier(); | |
| if (typeof m === 'string') { | |
| countMember(m); | |
| } | |
| that.left = left; | |
| that.right = m; | |
| if (option.noarg && left && left.value === 'arguments' && | |
| (m === 'callee' || m === 'caller')) { | |
| warning("Avoid arguments.{a}.", left, m); | |
| } else if (!option.evil && left && left.value === 'document' && | |
| (m === 'write' || m === 'writeln')) { | |
| warning("document.write can be a form of eval.", left); | |
| } | |
| if (!option.evil && (m === 'eval' || m === 'execScript')) { | |
| warning('eval is evil.'); | |
| } | |
| return that; | |
| }, 160, true); | |
| infix('(', function (left, that) { | |
| if (prevtoken.id !== '}' && prevtoken.id !== ')') { | |
| nobreak(prevtoken, token); | |
| } | |
| nospace(); | |
| if (option.immed && !left.immed && left.id === 'function') { | |
| warning("Wrap an immediate function invocation in parentheses " + | |
| "to assist the reader in understanding that the expression " + | |
| "is the result of a function, and not the function itself."); | |
| } | |
| var n = 0, | |
| p = []; | |
| if (left) { | |
| if (left.type === '(identifier)') { | |
| if (left.value.match(/^[A-Z]([A-Z0-9_$]*[a-z][A-Za-z0-9_$]*)?$/)) { | |
| if (left.value !== 'Number' && left.value !== 'String' && | |
| left.value !== 'Boolean' && | |
| left.value !== 'Date') { | |
| if (left.value === 'Math') { | |
| warning("Math is not a function.", left); | |
| } else if (option.newcap) { | |
| warning( | |
| "Missing 'new' prefix when invoking a constructor.", left); | |
| } | |
| } | |
| } | |
| } | |
| } | |
| if (nexttoken.id !== ')') { | |
| for (;;) { | |
| p[p.length] = expression(10); | |
| n += 1; | |
| if (nexttoken.id !== ',') { | |
| break; | |
| } | |
| comma(); | |
| } | |
| } | |
| advance(')'); | |
| nospace(prevtoken, token); | |
| if (typeof left === 'object') { | |
| if (left.value === 'parseInt' && n === 1) { | |
| warning("Missing radix parameter.", left); | |
| } | |
| if (!option.evil) { | |
| if (left.value === 'eval' || left.value === 'Function' || | |
| left.value === 'execScript') { | |
| warning("eval is evil.", left); | |
| } else if (p[0] && p[0].id === '(string)' && | |
| (left.value === 'setTimeout' || | |
| left.value === 'setInterval')) { | |
| warning( | |
| "Implied eval is evil. Pass a function instead of a string.", left); | |
| } | |
| } | |
| if (!left.identifier && left.id !== '.' && left.id !== '[' && | |
| left.id !== '(' && left.id !== '&&' && left.id !== '||' && | |
| left.id !== '?') { | |
| warning("Bad invocation.", left); | |
| } | |
| } | |
| that.left = left; | |
| return that; | |
| }, 155, true).exps = true; | |
| prefix('(', function () { | |
| nospace(); | |
| if (nexttoken.id === 'function') { | |
| nexttoken.immed = true; | |
| } | |
| var v = expression(0); | |
| advance(')', this); | |
| nospace(prevtoken, token); | |
| if (option.immed && v.id === 'function') { | |
| if (nexttoken.id === '(') { | |
| warning( | |
| "Move the invocation into the parens that contain the function.", nexttoken); | |
| } else { | |
| warning( | |
| "Do not wrap function literals in parens unless they are to be immediately invoked.", | |
| this); | |
| } | |
| } | |
| return v; | |
| }); | |
| infix('[', function (left, that) { | |
| nobreak(prevtoken, token); | |
| nospace(); | |
| var e = expression(0), s; | |
| if (e && e.type === '(string)') { | |
| if (!option.evil && (e.value === 'eval' || e.value === 'execScript')) { | |
| warning("eval is evil.", that); | |
| } | |
| countMember(e.value); | |
| if (!option.sub && ix.test(e.value)) { | |
| s = syntax[e.value]; | |
| if (!s || !s.reserved) { | |
| warning("['{a}'] is better written in dot notation.", | |
| e, e.value); | |
| } | |
| } | |
| } | |
| advance(']', that); | |
| nospace(prevtoken, token); | |
| that.left = left; | |
| that.right = e; | |
| return that; | |
| }, 160, true); | |
| prefix('[', function () { | |
| var b = token.line !== nexttoken.line; | |
| this.first = []; | |
| if (b) { | |
| indent += option.indent; | |
| if (nexttoken.from === indent + option.indent) { | |
| indent += option.indent; | |
| } | |
| } | |
| while (nexttoken.id !== '(end)') { | |
| while (nexttoken.id === ',') { | |
| warning("Extra comma."); | |
| advance(','); | |
| } | |
| if (nexttoken.id === ']') { | |
| break; | |
| } | |
| if (b && token.line !== nexttoken.line) { | |
| indentation(); | |
| } | |
| this.first.push(expression(10)); | |
| if (nexttoken.id === ',') { | |
| comma(); | |
| if (nexttoken.id === ']' && !option.es5) { | |
| warning("Extra comma.", token); | |
| break; | |
| } | |
| } else { | |
| break; | |
| } | |
| } | |
| if (b) { | |
| indent -= option.indent; | |
| indentation(); | |
| } | |
| advance(']', this); | |
| return this; | |
| }, 160); | |
| function property_name() { | |
| var id = optionalidentifier(true); | |
| if (!id) { | |
| if (nexttoken.id === '(string)') { | |
| id = nexttoken.value; | |
| advance(); | |
| } else if (nexttoken.id === '(number)') { | |
| id = nexttoken.value.toString(); | |
| advance(); | |
| } | |
| } | |
| return id; | |
| } | |
| function functionparams() { | |
| var i, t = nexttoken, p = []; | |
| advance('('); | |
| nospace(); | |
| if (nexttoken.id === ')') { | |
| advance(')'); | |
| nospace(prevtoken, token); | |
| return; | |
| } | |
| for (;;) { | |
| i = identifier(true); | |
| p.push(i); | |
| addlabel(i, 'parameter'); | |
| if (nexttoken.id === ',') { | |
| comma(); | |
| } else { | |
| advance(')', t); | |
| nospace(prevtoken, token); | |
| return p; | |
| } | |
| } | |
| } | |
| function doFunction(i, statement) { | |
| var f, | |
| oldOption = option, | |
| oldScope = scope; | |
| option = Object.create(option); | |
| scope = Object.create(scope); | |
| funct = { | |
| '(name)' : i || '"' + anonname + '"', | |
| '(line)' : nexttoken.line, | |
| '(context)' : funct, | |
| '(breakage)' : 0, | |
| '(loopage)' : 0, | |
| '(scope)' : scope, | |
| '(statement)': statement | |
| }; | |
| f = funct; | |
| token.funct = funct; | |
| functions.push(funct); | |
| if (i) { | |
| addlabel(i, 'function'); | |
| } | |
| funct['(params)'] = functionparams(); | |
| block(false); | |
| scope = oldScope; | |
| option = oldOption; | |
| funct['(last)'] = token.line; | |
| funct = funct['(context)']; | |
| return f; | |
| } | |
| (function (x) { | |
| x.nud = function () { | |
| var b, f, i, j, p, seen = {}, t; | |
| b = token.line !== nexttoken.line; | |
| if (b) { | |
| indent += option.indent; | |
| if (nexttoken.from === indent + option.indent) { | |
| indent += option.indent; | |
| } | |
| } | |
| for (;;) { | |
| if (nexttoken.id === '}') { | |
| break; | |
| } | |
| if (b) { | |
| indentation(); | |
| } | |
| if (nexttoken.value === 'get' && peek().id !== ':') { | |
| advance('get'); | |
| if (!option.es5) { | |
| error("get/set are ES5 features."); | |
| } | |
| i = property_name(); | |
| if (!i) { | |
| error("Missing property name."); | |
| } | |
| t = nexttoken; | |
| adjacent(token, nexttoken); | |
| f = doFunction(); | |
| if (!option.loopfunc && funct['(loopage)']) { | |
| warning("Don't make functions within a loop.", t); | |
| } | |
| p = f['(params)']; | |
| if (p) { | |
| warning("Unexpected parameter '{a}' in get {b} function.", t, p[0], i); | |
| } | |
| adjacent(token, nexttoken); | |
| advance(','); | |
| indentation(); | |
| advance('set'); | |
| j = property_name(); | |
| if (i !== j) { | |
| error("Expected {a} and instead saw {b}.", token, i, j); | |
| } | |
| t = nexttoken; | |
| adjacent(token, nexttoken); | |
| f = doFunction(); | |
| p = f['(params)']; | |
| if (!p || p.length !== 1 || p[0] !== 'value') { | |
| warning("Expected (value) in set {a} function.", t, i); | |
| } | |
| } else { | |
| i = property_name(); | |
| if (typeof i !== 'string') { | |
| break; | |
| } | |
| advance(':'); | |
| nonadjacent(token, nexttoken); | |
| expression(10); | |
| } | |
| if (seen[i] === true) { | |
| warning("Duplicate member '{a}'.", nexttoken, i); | |
| } | |
| seen[i] = true; | |
| countMember(i); | |
| if (nexttoken.id === ',') { | |
| comma(); | |
| if (nexttoken.id === ',') { | |
| warning("Extra comma.", token); | |
| } else if (nexttoken.id === '}' && !option.es5) { | |
| warning("Extra comma.", token); | |
| } | |
| } else { | |
| break; | |
| } | |
| } | |
| if (b) { | |
| indent -= option.indent; | |
| indentation(); | |
| } | |
| advance('}', this); | |
| return this; | |
| }; | |
| x.fud = function () { | |
| error("Expected to see a statement and instead saw a block.", token); | |
| }; | |
| }(delim('{'))); | |
| var varstatement = stmt('var', function (prefix) { | |
| // JavaScript does not have block scope. It only has function scope. So, | |
| // declaring a variable in a block can have unexpected consequences. | |
| var id, name, value; | |
| if (funct['(onevar)'] && option.onevar) { | |
| warning("Too many var statements."); | |
| } else if (!funct['(global)']) { | |
| funct['(onevar)'] = true; | |
| } | |
| this.first = []; | |
| for (;;) { | |
| nonadjacent(token, nexttoken); | |
| id = identifier(); | |
| if (funct['(global)'] && predefined[id] === false) { | |
| warning("Redefinition of '{a}'.", token, id); | |
| } | |
| addlabel(id, 'unused'); | |
| if (prefix) { | |
| break; | |
| } | |
| name = token; | |
| this.first.push(token); | |
| if (nexttoken.id === '=') { | |
| nonadjacent(token, nexttoken); | |
| advance('='); | |
| nonadjacent(token, nexttoken); | |
| if (nexttoken.id === 'undefined') { | |
| warning("It is not necessary to initialize '{a}' to 'undefined'.", token, id); | |
| } | |
| if (peek(0).id === '=' && nexttoken.identifier) { | |
| error("Variable {a} was not declared correctly.", | |
| nexttoken, nexttoken.value); | |
| } | |
| value = expression(0); | |
| name.first = value; | |
| } | |
| if (nexttoken.id !== ',') { | |
| break; | |
| } | |
| comma(); | |
| } | |
| return this; | |
| }); | |
| varstatement.exps = true; | |
| blockstmt('function', function () { | |
| if (inblock) { | |
| warning( | |
| "Function declarations should not be placed in blocks. Use a function expression or move the statement to the top of the outer function.", token); | |
| } | |
| var i = identifier(); | |
| adjacent(token, nexttoken); | |
| addlabel(i, 'unction'); | |
| doFunction(i, true); | |
| if (nexttoken.id === '(' && nexttoken.line === token.line) { | |
| error( | |
| "Function declarations are not invocable. Wrap the whole function invocation in parens."); | |
| } | |
| return this; | |
| }); | |
| prefix('function', function () { | |
| var i = optionalidentifier(); | |
| if (i) { | |
| adjacent(token, nexttoken); | |
| } else { | |
| nonadjacent(token, nexttoken); | |
| } | |
| doFunction(i); | |
| if (!option.loopfunc && funct['(loopage)']) { | |
| warning("Don't make functions within a loop."); | |
| } | |
| return this; | |
| }); | |
| blockstmt('if', function () { | |
| var t = nexttoken; | |
| advance('('); | |
| nonadjacent(this, t); | |
| nospace(); | |
| expression(20); | |
| if (nexttoken.id === '=') { | |
| if (!option.boss) | |
| warning("Expected a conditional expression and instead saw an assignment."); | |
| advance('='); | |
| expression(20); | |
| } | |
| advance(')', t); | |
| nospace(prevtoken, token); | |
| block(true, true); | |
| if (nexttoken.id === 'else') { | |
| nonadjacent(token, nexttoken); | |
| advance('else'); | |
| if (nexttoken.id === 'if' || nexttoken.id === 'switch') { | |
| statement(true); | |
| } else { | |
| block(true, true); | |
| } | |
| } | |
| return this; | |
| }); | |
| blockstmt('try', function () { | |
| var b, e, s; | |
| block(false); | |
| if (nexttoken.id === 'catch') { | |
| advance('catch'); | |
| nonadjacent(token, nexttoken); | |
| advance('('); | |
| s = scope; | |
| scope = Object.create(s); | |
| e = nexttoken.value; | |
| if (nexttoken.type !== '(identifier)') { | |
| warning("Expected an identifier and instead saw '{a}'.", | |
| nexttoken, e); | |
| } else { | |
| addlabel(e, 'exception'); | |
| } | |
| advance(); | |
| advance(')'); | |
| block(false); | |
| b = true; | |
| scope = s; | |
| } | |
| if (nexttoken.id === 'finally') { | |
| advance('finally'); | |
| block(false); | |
| return; | |
| } else if (!b) { | |
| error("Expected '{a}' and instead saw '{b}'.", | |
| nexttoken, 'catch', nexttoken.value); | |
| } | |
| return this; | |
| }); | |
| blockstmt('while', function () { | |
| var t = nexttoken; | |
| funct['(breakage)'] += 1; | |
| funct['(loopage)'] += 1; | |
| advance('('); | |
| nonadjacent(this, t); | |
| nospace(); | |
| expression(20); | |
| if (nexttoken.id === '=') { | |
| if (!option.boss) | |
| warning("Expected a conditional expression and instead saw an assignment."); | |
| advance('='); | |
| expression(20); | |
| } | |
| advance(')', t); | |
| nospace(prevtoken, token); | |
| block(true, true); | |
| funct['(breakage)'] -= 1; | |
| funct['(loopage)'] -= 1; | |
| return this; | |
| }).labelled = true; | |
| reserve('with'); | |
| blockstmt('switch', function () { | |
| var t = nexttoken, | |
| g = false; | |
| funct['(breakage)'] += 1; | |
| advance('('); | |
| nonadjacent(this, t); | |
| nospace(); | |
| this.condition = expression(20); | |
| advance(')', t); | |
| nospace(prevtoken, token); | |
| nonadjacent(token, nexttoken); | |
| t = nexttoken; | |
| advance('{'); | |
| nonadjacent(token, nexttoken); | |
| indent += option.indent; | |
| this.cases = []; | |
| for (;;) { | |
| switch (nexttoken.id) { | |
| case 'case': | |
| switch (funct['(verb)']) { | |
| case 'break': | |
| case 'case': | |
| case 'continue': | |
| case 'return': | |
| case 'switch': | |
| case 'throw': | |
| break; | |
| default: | |
| // You can tell JSHint that you don't use break intentionally by | |
| // adding a comment /* falls through */ on a line just before | |
| // the next `case`. | |
| if (!ft.test(lines[nexttoken.line - 2])) { | |
| warning( | |
| "Expected a 'break' statement before 'case'.", | |
| token); | |
| } | |
| } | |
| indentation(-option.indent); | |
| advance('case'); | |
| this.cases.push(expression(20)); | |
| g = true; | |
| advance(':'); | |
| funct['(verb)'] = 'case'; | |
| break; | |
| case 'default': | |
| switch (funct['(verb)']) { | |
| case 'break': | |
| case 'continue': | |
| case 'return': | |
| case 'throw': | |
| break; | |
| default: | |
| if (!ft.test(lines[nexttoken.line - 2])) { | |
| warning( | |
| "Expected a 'break' statement before 'default'.", | |
| token); | |
| } | |
| } | |
| indentation(-option.indent); | |
| advance('default'); | |
| g = true; | |
| advance(':'); | |
| break; | |
| case '}': | |
| indent -= option.indent; | |
| indentation(); | |
| advance('}', t); | |
| if (this.cases.length === 1 || this.condition.id === 'true' || | |
| this.condition.id === 'false') { | |
| warning("This 'switch' should be an 'if'.", this); | |
| } | |
| funct['(breakage)'] -= 1; | |
| funct['(verb)'] = undefined; | |
| return; | |
| case '(end)': | |
| error("Missing '{a}'.", nexttoken, '}'); | |
| return; | |
| default: | |
| if (g) { | |
| switch (token.id) { | |
| case ',': | |
| error("Each value should have its own case label."); | |
| return; | |
| case ':': | |
| statements(); | |
| break; | |
| default: | |
| error("Missing ':' on a case clause.", token); | |
| } | |
| } else { | |
| error("Expected '{a}' and instead saw '{b}'.", | |
| nexttoken, 'case', nexttoken.value); | |
| } | |
| } | |
| } | |
| }).labelled = true; | |
| stmt('debugger', function () { | |
| if (!option.debug) { | |
| warning("All 'debugger' statements should be removed."); | |
| } | |
| return this; | |
| }).exps = true; | |
| (function () { | |
| var x = stmt('do', function () { | |
| funct['(breakage)'] += 1; | |
| funct['(loopage)'] += 1; | |
| this.first = block(true); | |
| advance('while'); | |
| var t = nexttoken; | |
| nonadjacent(token, t); | |
| advance('('); | |
| nospace(); | |
| expression(20); | |
| if (nexttoken.id === '=') { | |
| if (!option.boss) | |
| warning("Expected a conditional expression and instead saw an assignment."); | |
| advance('='); | |
| expression(20); | |
| } | |
| advance(')', t); | |
| nospace(prevtoken, token); | |
| funct['(breakage)'] -= 1; | |
| funct['(loopage)'] -= 1; | |
| return this; | |
| }); | |
| x.labelled = true; | |
| x.exps = true; | |
| }()); | |
| blockstmt('for', function () { | |
| var s, t = nexttoken; | |
| funct['(breakage)'] += 1; | |
| funct['(loopage)'] += 1; | |
| advance('('); | |
| nonadjacent(this, t); | |
| nospace(); | |
| if (peek(nexttoken.id === 'var' ? 1 : 0).id === 'in') { | |
| if (nexttoken.id === 'var') { | |
| advance('var'); | |
| varstatement.fud.call(varstatement, true); | |
| } else { | |
| switch (funct[nexttoken.value]) { | |
| case 'unused': | |
| funct[nexttoken.value] = 'var'; | |
| break; | |
| case 'var': | |
| break; | |
| default: | |
| warning("Bad for in variable '{a}'.", | |
| nexttoken, nexttoken.value); | |
| } | |
| advance(); | |
| } | |
| advance('in'); | |
| expression(20); | |
| advance(')', t); | |
| s = block(true, true); | |
| if (option.forin && (s.length > 1 || typeof s[0] !== 'object' || | |
| s[0].value !== 'if')) { | |
| warning("The body of a for in should be wrapped in an if statement to filter unwanted properties from the prototype.", this); | |
| } | |
| funct['(breakage)'] -= 1; | |
| funct['(loopage)'] -= 1; | |
| return this; | |
| } else { | |
| if (nexttoken.id !== ';') { | |
| if (nexttoken.id === 'var') { | |
| advance('var'); | |
| varstatement.fud.call(varstatement); | |
| } else { | |
| for (;;) { | |
| expression(0, 'for'); | |
| if (nexttoken.id !== ',') { | |
| break; | |
| } | |
| comma(); | |
| } | |
| } | |
| } | |
| nolinebreak(token); | |
| advance(';'); | |
| if (nexttoken.id !== ';') { | |
| expression(20); | |
| if (nexttoken.id === '=') { | |
| if (!option.boss) | |
| warning("Expected a conditional expression and instead saw an assignment."); | |
| advance('='); | |
| expression(20); | |
| } | |
| } | |
| nolinebreak(token); | |
| advance(';'); | |
| if (nexttoken.id === ';') { | |
| error("Expected '{a}' and instead saw '{b}'.", | |
| nexttoken, ')', ';'); | |
| } | |
| if (nexttoken.id !== ')') { | |
| for (;;) { | |
| expression(0, 'for'); | |
| if (nexttoken.id !== ',') { | |
| break; | |
| } | |
| comma(); | |
| } | |
| } | |
| advance(')', t); | |
| nospace(prevtoken, token); | |
| block(true, true); | |
| funct['(breakage)'] -= 1; | |
| funct['(loopage)'] -= 1; | |
| return this; | |
| } | |
| }).labelled = true; | |
| stmt('break', function () { | |
| var v = nexttoken.value; | |
| if (funct['(breakage)'] === 0) { | |
| warning("Unexpected '{a}'.", nexttoken, this.value); | |
| } | |
| nolinebreak(this); | |
| if (nexttoken.id !== ';') { | |
| if (token.line === nexttoken.line) { | |
| if (funct[v] !== 'label') { | |
| warning("'{a}' is not a statement label.", nexttoken, v); | |
| } else if (scope[v] !== funct) { | |
| warning("'{a}' is out of scope.", nexttoken, v); | |
| } | |
| this.first = nexttoken; | |
| advance(); | |
| } | |
| } | |
| reachable('break'); | |
| return this; | |
| }).exps = true; | |
| stmt('continue', function () { | |
| var v = nexttoken.value; | |
| if (funct['(breakage)'] === 0) { | |
| warning("Unexpected '{a}'.", nexttoken, this.value); | |
| } | |
| nolinebreak(this); | |
| if (nexttoken.id !== ';') { | |
| if (token.line === nexttoken.line) { | |
| if (funct[v] !== 'label') { | |
| warning("'{a}' is not a statement label.", nexttoken, v); | |
| } else if (scope[v] !== funct) { | |
| warning("'{a}' is out of scope.", nexttoken, v); | |
| } | |
| this.first = nexttoken; | |
| advance(); | |
| } | |
| } else if (!funct['(loopage)']) { | |
| warning("Unexpected '{a}'.", nexttoken, this.value); | |
| } | |
| reachable('continue'); | |
| return this; | |
| }).exps = true; | |
| stmt('return', function () { | |
| nolinebreak(this); | |
| if (nexttoken.id === '(regexp)') { | |
| warning("Wrap the /regexp/ literal in parens to disambiguate the slash operator."); | |
| } | |
| if (nexttoken.id !== ';' && !nexttoken.reach) { | |
| nonadjacent(token, nexttoken); | |
| this.first = expression(20); | |
| } | |
| reachable('return'); | |
| return this; | |
| }).exps = true; | |
| stmt('throw', function () { | |
| nolinebreak(this); | |
| nonadjacent(token, nexttoken); | |
| this.first = expression(20); | |
| reachable('throw'); | |
| return this; | |
| }).exps = true; | |
| // Superfluous reserved words | |
| reserve('class'); | |
| reserve('const'); | |
| reserve('enum'); | |
| reserve('export'); | |
| reserve('extends'); | |
| reserve('import'); | |
| reserve('super'); | |
| reserve('let'); | |
| reserve('yield'); | |
| reserve('implements'); | |
| reserve('interface'); | |
| reserve('package'); | |
| reserve('private'); | |
| reserve('protected'); | |
| reserve('public'); | |
| reserve('static'); | |
| // Parse JSON | |
| function jsonValue() { | |
| function jsonObject() { | |
| var o = {}, t = nexttoken; | |
| advance('{'); | |
| if (nexttoken.id !== '}') { | |
| for (;;) { | |
| if (nexttoken.id === '(end)') { | |
| error("Missing '}' to match '{' from line {a}.", | |
| nexttoken, t.line); | |
| } else if (nexttoken.id === '}') { | |
| warning("Unexpected comma.", token); | |
| break; | |
| } else if (nexttoken.id === ',') { | |
| error("Unexpected comma.", nexttoken); | |
| } else if (nexttoken.id !== '(string)') { | |
| warning("Expected a string and instead saw {a}.", | |
| nexttoken, nexttoken.value); | |
| } | |
| if (o[nexttoken.value] === true) { | |
| warning("Duplicate key '{a}'.", | |
| nexttoken, nexttoken.value); | |
| } else if (nexttoken.value === '__proto__') { | |
| warning("Stupid key '{a}'.", | |
| nexttoken, nexttoken.value); | |
| } else { | |
| o[nexttoken.value] = true; | |
| } | |
| advance(); | |
| advance(':'); | |
| jsonValue(); | |
| if (nexttoken.id !== ',') { | |
| break; | |
| } | |
| advance(','); | |
| } | |
| } | |
| advance('}'); | |
| } | |
| function jsonArray() { | |
| var t = nexttoken; | |
| advance('['); | |
| if (nexttoken.id !== ']') { | |
| for (;;) { | |
| if (nexttoken.id === '(end)') { | |
| error("Missing ']' to match '[' from line {a}.", | |
| nexttoken, t.line); | |
| } else if (nexttoken.id === ']') { | |
| warning("Unexpected comma.", token); | |
| break; | |
| } else if (nexttoken.id === ',') { | |
| error("Unexpected comma.", nexttoken); | |
| } | |
| jsonValue(); | |
| if (nexttoken.id !== ',') { | |
| break; | |
| } | |
| advance(','); | |
| } | |
| } | |
| advance(']'); | |
| } | |
| switch (nexttoken.id) { | |
| case '{': | |
| jsonObject(); | |
| break; | |
| case '[': | |
| jsonArray(); | |
| break; | |
| case 'true': | |
| case 'false': | |
| case 'null': | |
| case '(number)': | |
| case '(string)': | |
| advance(); | |
| break; | |
| case '-': | |
| advance('-'); | |
| if (token.character !== nexttoken.from) { | |
| warning("Unexpected space after '-'.", token); | |
| } | |
| adjacent(token, nexttoken); | |
| advance('(number)'); | |
| break; | |
| default: | |
| error("Expected a JSON value.", nexttoken); | |
| } | |
| } | |
| // The actual JSHINT function itself. | |
| var itself = function (s, o, g) { | |
| var a, i, k; | |
| JSHINT.errors = []; | |
| predefined = Object.create(standard); | |
| combine(predefined, g || {}); | |
| if (o) { | |
| a = o.predef; | |
| if (a) { | |
| if (Array.isArray(a)) { | |
| for (i = 0; i < a.length; i += 1) { | |
| predefined[a[i]] = true; | |
| } | |
| } else if (typeof a === 'object') { | |
| k = Object.keys(a); | |
| for (i = 0; i < k.length; i += 1) { | |
| predefined[k[i]] = !!a[k]; | |
| } | |
| } | |
| } | |
| option = o; | |
| } else { | |
| option = {}; | |
| } | |
| option.indent = option.indent || 4; | |
| option.maxerr = option.maxerr || 50; | |
| tab = ''; | |
| for (i = 0; i < option.indent; i += 1) { | |
| tab += ' '; | |
| } | |
| indent = 1; | |
| global = Object.create(predefined); | |
| scope = global; | |
| funct = { | |
| '(global)': true, | |
| '(name)': '(global)', | |
| '(scope)': scope, | |
| '(breakage)': 0, | |
| '(loopage)': 0 | |
| }; | |
| functions = [funct]; | |
| urls = []; | |
| src = false; | |
| stack = null; | |
| member = {}; | |
| membersOnly = null; | |
| implied = {}; | |
| inblock = false; | |
| lookahead = []; | |
| jsonmode = false; | |
| warnings = 0; | |
| lex.init(s); | |
| prereg = true; | |
| strict_mode = false; | |
| prevtoken = token = nexttoken = syntax['(begin)']; | |
| assume(); | |
| try { | |
| advance(); | |
| switch (nexttoken.id) { | |
| case '{': | |
| case '[': | |
| option.laxbreak = true; | |
| jsonmode = true; | |
| jsonValue(); | |
| break; | |
| default: | |
| if (nexttoken.value === 'use strict') { | |
| if (!option.globalstrict) | |
| warning("Use the function form of \"use strict\"."); | |
| use_strict(); | |
| } | |
| statements('lib'); | |
| } | |
| advance('(end)'); | |
| } catch (e) { | |
| if (e) { | |
| JSHINT.errors.push({ | |
| reason : e.message, | |
| line : e.line || nexttoken.line, | |
| character : e.character || nexttoken.from | |
| }, null); | |
| } | |
| } | |
| return JSHINT.errors.length === 0; | |
| }; | |
| // Data summary. | |
| itself.data = function () { | |
| var data = {functions: []}, fu, globals, implieds = [], f, i, j, | |
| members = [], n, unused = [], v; | |
| if (itself.errors.length) { | |
| data.errors = itself.errors; | |
| } | |
| if (jsonmode) { | |
| data.json = true; | |
| } | |
| for (n in implied) { | |
| if (is_own(implied, n)) { | |
| implieds.push({ | |
| name: n, | |
| line: implied[n] | |
| }); | |
| } | |
| } | |
| if (implieds.length > 0) { | |
| data.implieds = implieds; | |
| } | |
| if (urls.length > 0) { | |
| data.urls = urls; | |
| } | |
| globals = Object.keys(scope); | |
| if (globals.length > 0) { | |
| data.globals = globals; | |
| } | |
| for (i = 1; i < functions.length; i += 1) { | |
| f = functions[i]; | |
| fu = {}; | |
| for (j = 0; j < functionicity.length; j += 1) { | |
| fu[functionicity[j]] = []; | |
| } | |
| for (n in f) { | |
| if (is_own(f, n) && n.charAt(0) !== '(') { | |
| v = f[n]; | |
| if (v === 'unction') { | |
| v = 'unused'; | |
| } | |
| if (Array.isArray(fu[v])) { | |
| fu[v].push(n); | |
| if (v === 'unused') { | |
| unused.push({ | |
| name: n, | |
| line: f['(line)'], | |
| 'function': f['(name)'] | |
| }); | |
| } | |
| } | |
| } | |
| } | |
| for (j = 0; j < functionicity.length; j += 1) { | |
| if (fu[functionicity[j]].length === 0) { | |
| delete fu[functionicity[j]]; | |
| } | |
| } | |
| fu.name = f['(name)']; | |
| fu.param = f['(params)']; | |
| fu.line = f['(line)']; | |
| fu.last = f['(last)']; | |
| data.functions.push(fu); | |
| } | |
| if (unused.length > 0) { | |
| data.unused = unused; | |
| } | |
| members = []; | |
| for (n in member) { | |
| if (typeof member[n] === 'number') { | |
| data.member = member; | |
| break; | |
| } | |
| } | |
| return data; | |
| }; | |
| itself.report = function (option) { | |
| var data = itself.data(); | |
| var a = [], c, e, err, f, i, k, l, m = '', n, o = [], s; | |
| function detail(h, array) { | |
| var b, i, singularity; | |
| if (array) { | |
| o.push('<div><i>' + h + '</i> '); | |
| array = array.sort(); | |
| for (i = 0; i < array.length; i += 1) { | |
| if (array[i] !== singularity) { | |
| singularity = array[i]; | |
| o.push((b ? ', ' : '') + singularity); | |
| b = true; | |
| } | |
| } | |
| o.push('</div>'); | |
| } | |
| } | |
| if (data.errors || data.implieds || data.unused) { | |
| err = true; | |
| o.push('<div id=errors><i>Error:</i>'); | |
| if (data.errors) { | |
| for (i = 0; i < data.errors.length; i += 1) { | |
| c = data.errors[i]; | |
| if (c) { | |
| e = c.evidence || ''; | |
| o.push('<p>Problem' + (isFinite(c.line) ? ' at line ' + | |
| c.line + ' character ' + c.character : '') + | |
| ': ' + c.reason.entityify() + | |
| '</p><p class=evidence>' + | |
| (e && (e.length > 80 ? e.slice(0, 77) + '...' : | |
| e).entityify()) + '</p>'); | |
| } | |
| } | |
| } | |
| if (data.implieds) { | |
| s = []; | |
| for (i = 0; i < data.implieds.length; i += 1) { | |
| s[i] = '<code>' + data.implieds[i].name + '</code> <i>' + | |
| data.implieds[i].line + '</i>'; | |
| } | |
| o.push('<p><i>Implied global:</i> ' + s.join(', ') + '</p>'); | |
| } | |
| if (data.unused) { | |
| s = []; | |
| for (i = 0; i < data.unused.length; i += 1) { | |
| s[i] = '<code><u>' + data.unused[i].name + '</u></code> <i>' + | |
| data.unused[i].line + '</i> <code>' + | |
| data.unused[i]['function'] + '</code>'; | |
| } | |
| o.push('<p><i>Unused variable:</i> ' + s.join(', ') + '</p>'); | |
| } | |
| if (data.json) { | |
| o.push('<p>JSON: bad.</p>'); | |
| } | |
| o.push('</div>'); | |
| } | |
| if (!option) { | |
| o.push('<br><div id=functions>'); | |
| if (data.urls) { | |
| detail("URLs<br>", data.urls, '<br>'); | |
| } | |
| if (data.json && !err) { | |
| o.push('<p>JSON: good.</p>'); | |
| } else if (data.globals) { | |
| o.push('<div><i>Global</i> ' + | |
| data.globals.sort().join(', ') + '</div>'); | |
| } else { | |
| o.push('<div><i>No new global variables introduced.</i></div>'); | |
| } | |
| for (i = 0; i < data.functions.length; i += 1) { | |
| f = data.functions[i]; | |
| o.push('<br><div class=function><i>' + f.line + '-' + | |
| f.last + '</i> ' + (f.name || '') + '(' + | |
| (f.param ? f.param.join(', ') : '') + ')</div>'); | |
| detail('<big><b>Unused</b></big>', f.unused); | |
| detail('Closure', f.closure); | |
| detail('Variable', f['var']); | |
| detail('Exception', f.exception); | |
| detail('Outer', f.outer); | |
| detail('Global', f.global); | |
| detail('Label', f.label); | |
| } | |
| if (data.member) { | |
| a = Object.keys(data.member); | |
| if (a.length) { | |
| a = a.sort(); | |
| m = '<br><pre id=members>/*members '; | |
| l = 10; | |
| for (i = 0; i < a.length; i += 1) { | |
| k = a[i]; | |
| n = k.name(); | |
| if (l + n.length > 72) { | |
| o.push(m + '<br>'); | |
| m = ' '; | |
| l = 1; | |
| } | |
| l += n.length + 2; | |
| if (data.member[k] === 1) { | |
| n = '<i>' + n + '</i>'; | |
| } | |
| if (i < a.length - 1) { | |
| n += ', '; | |
| } | |
| m += n; | |
| } | |
| o.push(m + '<br>*/</pre>'); | |
| } | |
| o.push('</div>'); | |
| } | |
| } | |
| return o.join(''); | |
| }; | |
| itself.jshint = itself; | |
| itself.edition = '2011-04-16'; | |
| return itself; | |
| }()); | |
| // Make JSHINT a Node module, if possible. | |
| if (typeof exports == 'object' && exports) | |
| exports.JSHINT = JSHINT; | |