mirror of
https://github.com/jquery/jquery.git
synced 2024-12-25 13:14:21 +00:00
4359 lines
154 KiB
JavaScript
4359 lines
154 KiB
JavaScript
/*!
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* JSHint, by JSHint Community.
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*
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* Licensed under the same slightly modified MIT license that JSLint is.
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* It stops evil-doers everywhere.
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*
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* JSHint is a derivative work of JSLint:
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*
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* Copyright (c) 2002 Douglas Crockford (www.JSLint.com)
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom
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* the Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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*
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* The Software shall be used for Good, not Evil.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*
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* JSHint was forked from 2010-12-16 edition of JSLint.
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*
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*/
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/*
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JSHINT is a global function. It takes two parameters.
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var myResult = JSHINT(source, option);
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The first parameter is either a string or an array of strings. If it is a
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string, it will be split on '\n' or '\r'. If it is an array of strings, it
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is assumed that each string represents one line. The source can be a
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JavaScript text or a JSON text.
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The second parameter is an optional object of options which control the
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operation of JSHINT. Most of the options are booleans: They are all
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optional and have a default value of false. One of the options, predef,
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can be an array of names, which will be used to declare global variables,
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or an object whose keys are used as global names, with a boolean value
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that determines if they are assignable.
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If it checks out, JSHINT returns true. Otherwise, it returns false.
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If false, you can inspect JSHINT.errors to find out the problems.
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JSHINT.errors is an array of objects containing these members:
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{
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line : The line (relative to 0) at which the lint was found
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character : The character (relative to 0) at which the lint was found
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reason : The problem
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evidence : The text line in which the problem occurred
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raw : The raw message before the details were inserted
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a : The first detail
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b : The second detail
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c : The third detail
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d : The fourth detail
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}
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If a fatal error was found, a null will be the last element of the
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JSHINT.errors array.
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You can request a Function Report, which shows all of the functions
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and the parameters and vars that they use. This can be used to find
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implied global variables and other problems. The report is in HTML and
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can be inserted in an HTML <body>.
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var myReport = JSHINT.report(limited);
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If limited is true, then the report will be limited to only errors.
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You can request a data structure which contains JSHint's results.
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var myData = JSHINT.data();
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It returns a structure with this form:
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{
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errors: [
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{
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line: NUMBER,
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character: NUMBER,
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reason: STRING,
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evidence: STRING
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}
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],
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functions: [
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name: STRING,
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line: NUMBER,
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last: NUMBER,
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param: [
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STRING
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],
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closure: [
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STRING
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],
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var: [
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STRING
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],
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exception: [
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STRING
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],
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outer: [
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STRING
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],
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unused: [
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STRING
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],
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global: [
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STRING
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],
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label: [
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STRING
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]
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],
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globals: [
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STRING
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],
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member: {
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STRING: NUMBER
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},
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unused: [
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{
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name: STRING,
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line: NUMBER
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}
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],
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implieds: [
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{
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name: STRING,
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line: NUMBER
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}
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],
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urls: [
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STRING
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],
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json: BOOLEAN
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}
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Empty arrays will not be included.
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*/
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/*jshint
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evil: true, nomen: false, onevar: false, regexp: false, strict: true, boss: true,
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undef: true, maxlen: 100, indent:4
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*/
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/*members "\b", "\t", "\n", "\f", "\r", "!=", "!==", "\"", "%", "(begin)",
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"(breakage)", "(context)", "(error)", "(global)", "(identifier)", "(last)",
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"(line)", "(loopage)", "(name)", "(onevar)", "(params)", "(scope)",
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"(statement)", "(verb)", "*", "+", "++", "-", "--", "\/", "<", "<=", "==",
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"===", ">", ">=", $, $$, $A, $F, $H, $R, $break, $continue, $w, Abstract, Ajax,
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__filename, __dirname, ActiveXObject, Array, ArrayBuffer, ArrayBufferView, Audio,
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Autocompleter, Assets, Boolean, Builder, Buffer, Browser, COM, CScript, Canvas,
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CustomAnimation, Class, Control, Chain, Color, Cookie, Core, DataView, Date,
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Debug, Draggable, Draggables, Droppables, Document, DomReady, DOMReady, Drag,
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E, Enumerator, Enumerable, Element, Elements, Error, Effect, EvalError, Event,
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Events, FadeAnimation, Field, Flash, Float32Array, Float64Array, Form,
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FormField, Frame, FormData, Function, Fx, GetObject, Group, Hash, HotKey,
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HTMLElement, HTMLAnchorElement, HTMLBaseElement, HTMLBlockquoteElement,
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HTMLBodyElement, HTMLBRElement, HTMLButtonElement, HTMLCanvasElement, HTMLDirectoryElement,
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HTMLDivElement, HTMLDListElement, HTMLFieldSetElement,
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HTMLFontElement, HTMLFormElement, HTMLFrameElement, HTMLFrameSetElement,
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HTMLHeadElement, HTMLHeadingElement, HTMLHRElement, HTMLHtmlElement,
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HTMLIFrameElement, HTMLImageElement, HTMLInputElement, HTMLIsIndexElement,
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HTMLLabelElement, HTMLLayerElement, HTMLLegendElement, HTMLLIElement,
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HTMLLinkElement, HTMLMapElement, HTMLMenuElement, HTMLMetaElement,
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HTMLModElement, HTMLObjectElement, HTMLOListElement, HTMLOptGroupElement,
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HTMLOptionElement, HTMLParagraphElement, HTMLParamElement, HTMLPreElement,
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HTMLQuoteElement, HTMLScriptElement, HTMLSelectElement, HTMLStyleElement,
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HtmlTable, HTMLTableCaptionElement, HTMLTableCellElement, HTMLTableColElement,
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HTMLTableElement, HTMLTableRowElement, HTMLTableSectionElement,
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HTMLTextAreaElement, HTMLTitleElement, HTMLUListElement, HTMLVideoElement,
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Iframe, IframeShim, Image, Int16Array, Int32Array, Int8Array,
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Insertion, InputValidator, JSON, Keyboard, Locale, LN10, LN2, LOG10E, LOG2E,
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MAX_VALUE, MIN_VALUE, Mask, Math, MenuItem, MoveAnimation, MooTools, Native,
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NEGATIVE_INFINITY, Number, Object, ObjectRange, Option, Options, OverText, PI,
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POSITIVE_INFINITY, PeriodicalExecuter, Point, Position, Prototype, RangeError,
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Rectangle, ReferenceError, RegExp, ResizeAnimation, Request, RotateAnimation,
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SQRT1_2, SQRT2, ScrollBar, ScriptEngine, ScriptEngineBuildVersion,
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ScriptEngineMajorVersion, ScriptEngineMinorVersion, Scriptaculous, Scroller,
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Slick, Slider, Selector, SharedWorker, String, Style, SyntaxError, Sortable, Sortables,
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SortableObserver, Sound, Spinner, System, Swiff, Text, TextArea, Template,
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Timer, Tips, Type, TypeError, Toggle, Try, "use strict", unescape, URI, URIError, URL,
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VBArray, WSH, WScript, XDomainRequest, Web, Window, XMLDOM, XMLHttpRequest, XPathEvaluator,
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XPathException, XPathExpression, XPathNamespace, XPathNSResolver, XPathResult, "\\", a,
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addEventListener, address, alert, apply, applicationCache, arguments, arity,
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asi, b, basic, basicToken, bitwise, block, blur, boolOptions, boss, browser, c, call, callee,
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caller, cases, charAt, charCodeAt, character, clearInterval, clearTimeout,
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close, closed, closure, comment, condition, confirm, console, constructor,
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content, couch, create, css, curly, d, data, datalist, dd, debug, decodeURI,
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decodeURIComponent, defaultStatus, defineClass, deserialize, devel, document,
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dojo, dijit, dojox, define, else, emit, encodeURI, encodeURIComponent,
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entityify, eqeqeq, eqnull, errors, es5, escape, esnext, eval, event, evidence, evil,
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ex, exception, exec, exps, expr, exports, FileReader, first, floor, focus,
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forin, fragment, frames, from, fromCharCode, fud, funcscope, funct, function, functions,
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g, gc, getComputedStyle, getRow, getter, getterToken, GLOBAL, global, globals, globalstrict,
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hasOwnProperty, help, history, i, id, identifier, immed, implieds, importPackage, include,
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indent, indexOf, init, ins, instanceOf, isAlpha, isApplicationRunning, isArray,
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isDigit, isFinite, isNaN, iterator, java, join, jshint,
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JSHINT, json, jquery, jQuery, keys, label, labelled, last, lastsemic, laxbreak, laxcomma,
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latedef, lbp, led, left, length, line, load, loadClass, localStorage, location,
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log, loopfunc, m, match, maxerr, maxlen, member,message, meta, module, moveBy,
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moveTo, mootools, multistr, name, navigator, new, newcap, noarg, node, noempty, nomen,
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nonew, nonstandard, nud, onbeforeunload, onblur, onerror, onevar, onecase, onfocus,
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onload, onresize, onunload, open, openDatabase, openURL, opener, opera, options, outer, param,
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parent, parseFloat, parseInt, passfail, plusplus, predef, print, process, prompt,
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proto, prototype, prototypejs, provides, push, quit, range, raw, reach, reason, regexp,
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readFile, readUrl, regexdash, removeEventListener, replace, report, require,
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reserved, resizeBy, resizeTo, resolvePath, resumeUpdates, respond, rhino, right,
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runCommand, scroll, screen, scripturl, scrollBy, scrollTo, scrollbar, search, seal,
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send, serialize, sessionStorage, setInterval, setTimeout, setter, setterToken, shift, slice,
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smarttabs, sort, spawn, split, stack, status, start, strict, sub, substr, supernew, shadow,
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supplant, sum, sync, test, toLowerCase, toString, toUpperCase, toint32, token, top, trailing,
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type, typeOf, Uint16Array, Uint32Array, Uint8Array, undef, undefs, unused, urls, validthis,
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value, valueOf, var, version, WebSocket, white, window, Worker, wsh*/
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/*global exports: false */
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// We build the application inside a function so that we produce only a single
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// global variable. That function will be invoked immediately, and its return
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// value is the JSHINT function itself.
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var JSHINT = (function () {
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"use strict";
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var anonname, // The guessed name for anonymous functions.
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// These are operators that should not be used with the ! operator.
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bang = {
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'<' : true,
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'<=' : true,
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'==' : true,
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'===': true,
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'!==': true,
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'!=' : true,
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'>' : true,
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'>=' : true,
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'+' : true,
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'-' : true,
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'*' : true,
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'/' : true,
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'%' : true
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},
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// These are the JSHint boolean options.
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boolOptions = {
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asi : true, // if automatic semicolon insertion should be tolerated
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bitwise : true, // if bitwise operators should not be allowed
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boss : true, // if advanced usage of assignments should be allowed
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browser : true, // if the standard browser globals should be predefined
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couch : true, // if CouchDB globals should be predefined
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curly : true, // if curly braces around all blocks should be required
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debug : true, // if debugger statements should be allowed
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devel : true, // if logging globals should be predefined (console,
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// alert, etc.)
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dojo : true, // if Dojo Toolkit globals should be predefined
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eqeqeq : true, // if === should be required
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eqnull : true, // if == null comparisons should be tolerated
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es5 : true, // if ES5 syntax should be allowed
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esnext : true, // if es.next specific syntax should be allowed
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evil : true, // if eval should be allowed
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expr : true, // if ExpressionStatement should be allowed as Programs
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forin : true, // if for in statements must filter
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funcscope : true, // if only function scope should be used for scope tests
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globalstrict: true, // if global "use strict"; should be allowed (also
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// enables 'strict')
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immed : true, // if immediate invocations must be wrapped in parens
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iterator : true, // if the `__iterator__` property should be allowed
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jquery : true, // if jQuery globals should be predefined
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lastsemic : true, // if semicolons may be ommitted for the trailing
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// statements inside of a one-line blocks.
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latedef : true, // if the use before definition should not be tolerated
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laxbreak : true, // if line breaks should not be checked
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laxcomma : true, // if line breaks should not be checked around commas
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loopfunc : true, // if functions should be allowed to be defined within
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// loops
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mootools : true, // if MooTools globals should be predefined
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multistr : true, // allow multiline strings
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newcap : true, // if constructor names must be capitalized
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noarg : true, // if arguments.caller and arguments.callee should be
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// disallowed
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node : true, // if the Node.js environment globals should be
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// predefined
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noempty : true, // if empty blocks should be disallowed
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nonew : true, // if using `new` for side-effects should be disallowed
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nonstandard : true, // if non-standard (but widely adopted) globals should
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// be predefined
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nomen : true, // if names should be checked
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onevar : true, // if only one var statement per function should be
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// allowed
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onecase : true, // if one case switch statements should be allowed
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passfail : true, // if the scan should stop on first error
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plusplus : true, // if increment/decrement should not be allowed
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proto : true, // if the `__proto__` property should be allowed
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prototypejs : true, // if Prototype and Scriptaculous globals should be
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// predefined
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regexdash : true, // if unescaped first/last dash (-) inside brackets
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// should be tolerated
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regexp : true, // if the . should not be allowed in regexp literals
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rhino : true, // if the Rhino environment globals should be predefined
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undef : true, // if variables should be declared before used
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scripturl : true, // if script-targeted URLs should be tolerated
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shadow : true, // if variable shadowing should be tolerated
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smarttabs : true, // if smarttabs should be tolerated
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// (http://www.emacswiki.org/emacs/SmartTabs)
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strict : true, // require the "use strict"; pragma
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sub : true, // if all forms of subscript notation are tolerated
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supernew : true, // if `new function () { ... };` and `new Object;`
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// should be tolerated
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trailing : true, // if trailing whitespace rules apply
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validthis : true, // if 'this' inside a non-constructor function is valid.
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// This is a function scoped option only.
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white : true, // if strict whitespace rules apply
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wsh : true // if the Windows Scripting Host environment globals
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// should be predefined
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},
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// browser contains a set of global names which are commonly provided by a
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// web browser environment.
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browser = {
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ArrayBuffer : false,
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ArrayBufferView : false,
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Audio : false,
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addEventListener : false,
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applicationCache : false,
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blur : false,
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clearInterval : false,
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clearTimeout : false,
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close : false,
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closed : false,
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DataView : false,
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defaultStatus : false,
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document : false,
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event : false,
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FileReader : false,
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Float32Array : false,
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Float64Array : false,
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FormData : false,
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focus : false,
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frames : false,
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getComputedStyle : false,
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HTMLElement : false,
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HTMLAnchorElement : false,
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HTMLBaseElement : false,
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HTMLBlockquoteElement : false,
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HTMLBodyElement : false,
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HTMLBRElement : false,
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HTMLButtonElement : false,
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HTMLCanvasElement : false,
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HTMLDirectoryElement : false,
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HTMLDivElement : false,
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HTMLDListElement : false,
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HTMLFieldSetElement : false,
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HTMLFontElement : false,
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HTMLFormElement : false,
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HTMLFrameElement : false,
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HTMLFrameSetElement : false,
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HTMLHeadElement : false,
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HTMLHeadingElement : false,
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HTMLHRElement : false,
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HTMLHtmlElement : false,
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HTMLIFrameElement : false,
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HTMLImageElement : false,
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HTMLInputElement : false,
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HTMLIsIndexElement : false,
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HTMLLabelElement : false,
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HTMLLayerElement : false,
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HTMLLegendElement : false,
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HTMLLIElement : false,
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HTMLLinkElement : false,
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HTMLMapElement : false,
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HTMLMenuElement : false,
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HTMLMetaElement : false,
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HTMLModElement : false,
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HTMLObjectElement : false,
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HTMLOListElement : false,
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HTMLOptGroupElement : false,
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HTMLOptionElement : false,
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HTMLParagraphElement : false,
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HTMLParamElement : false,
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HTMLPreElement : false,
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HTMLQuoteElement : false,
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HTMLScriptElement : false,
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HTMLSelectElement : false,
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HTMLStyleElement : false,
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HTMLTableCaptionElement : false,
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HTMLTableCellElement : false,
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HTMLTableColElement : false,
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HTMLTableElement : false,
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HTMLTableRowElement : false,
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HTMLTableSectionElement : false,
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HTMLTextAreaElement : false,
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HTMLTitleElement : false,
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HTMLUListElement : false,
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HTMLVideoElement : false,
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history : false,
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Int16Array : false,
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Int32Array : false,
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Int8Array : false,
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Image : false,
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length : false,
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localStorage : false,
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location : false,
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moveBy : false,
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moveTo : false,
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name : false,
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navigator : false,
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onbeforeunload : true,
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onblur : true,
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onerror : true,
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onfocus : true,
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onload : true,
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onresize : true,
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onunload : true,
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open : false,
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openDatabase : false,
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opener : false,
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Option : false,
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parent : false,
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print : false,
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removeEventListener : false,
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resizeBy : false,
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resizeTo : false,
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screen : false,
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scroll : false,
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scrollBy : false,
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scrollTo : false,
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sessionStorage : false,
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setInterval : false,
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setTimeout : false,
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SharedWorker : false,
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status : false,
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top : false,
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Uint16Array : false,
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Uint32Array : false,
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Uint8Array : false,
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WebSocket : false,
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window : false,
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Worker : false,
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XMLHttpRequest : false,
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XPathEvaluator : false,
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XPathException : false,
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XPathExpression : false,
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XPathNamespace : false,
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XPathNSResolver : false,
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XPathResult : false
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},
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couch = {
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"require" : false,
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respond : false,
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getRow : false,
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emit : false,
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send : false,
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start : false,
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sum : false,
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log : false,
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exports : false,
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module : false,
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provides : false
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},
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|
|
|
devel = {
|
|
alert : false,
|
|
confirm : false,
|
|
console : false,
|
|
Debug : false,
|
|
opera : false,
|
|
prompt : false
|
|
},
|
|
|
|
dojo = {
|
|
dojo : false,
|
|
dijit : false,
|
|
dojox : false,
|
|
define : false,
|
|
"require" : 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,
|
|
Buffer : false,
|
|
console : false,
|
|
exports : false,
|
|
GLOBAL : false,
|
|
global : false,
|
|
module : false,
|
|
process : false,
|
|
require : false,
|
|
setTimeout : false,
|
|
clearTimeout : false,
|
|
setInterval : false,
|
|
clearInterval : 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,
|
|
importPackage: false,
|
|
"java" : 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
|
|
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
|
|
},
|
|
|
|
// widely adopted global names that are not part of ECMAScript standard
|
|
nonstandard = {
|
|
escape : false,
|
|
unescape : 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
|
|
},
|
|
|
|
directive,
|
|
syntax = {},
|
|
tab,
|
|
token,
|
|
urls,
|
|
useESNextSyntax,
|
|
warnings,
|
|
|
|
wsh = {
|
|
ActiveXObject : true,
|
|
Enumerator : true,
|
|
GetObject : true,
|
|
ScriptEngine : true,
|
|
ScriptEngineBuildVersion : true,
|
|
ScriptEngineMajorVersion : true,
|
|
ScriptEngineMinorVersion : true,
|
|
VBArray : true,
|
|
WSH : true,
|
|
WScript : true,
|
|
XDomainRequest : true
|
|
};
|
|
|
|
// Regular expressions. Some of these are stupidly long.
|
|
var ax, cx, tx, nx, nxg, lx, ix, jx, ft;
|
|
(function () {
|
|
/*jshint maxlen:300 */
|
|
|
|
// 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.dojo) {
|
|
combine(predefined, dojo);
|
|
}
|
|
|
|
if (option.browser) {
|
|
combine(predefined, browser);
|
|
}
|
|
|
|
if (option.nonstandard) {
|
|
combine(predefined, nonstandard);
|
|
}
|
|
|
|
if (option.jquery) {
|
|
combine(predefined, jquery);
|
|
}
|
|
|
|
if (option.mootools) {
|
|
combine(predefined, mootools);
|
|
}
|
|
|
|
if (option.wsh) {
|
|
combine(predefined, wsh);
|
|
}
|
|
|
|
if (option.esnext) {
|
|
useESNextSyntax();
|
|
}
|
|
|
|
if (option.globalstrict && option.strict !== false) {
|
|
option.strict = true;
|
|
}
|
|
}
|
|
|
|
|
|
// Produce an error warning.
|
|
function quit(message, line, chr) {
|
|
var percentage = Math.floor((line / lines.length) * 100);
|
|
|
|
throw {
|
|
name: 'JSHintError',
|
|
line: line,
|
|
character: chr,
|
|
message: message + " (" + percentage + "% scanned).",
|
|
raw: message
|
|
};
|
|
}
|
|
|
|
function isundef(scope, m, t, a) {
|
|
return JSHINT.undefs.push([scope, m, t, a]);
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
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;
|
|
|
|
// If smarttabs option is used check for spaces followed by tabs only.
|
|
// Otherwise check for any occurence of mixed tabs and spaces.
|
|
if (option.smarttabs)
|
|
at = s.search(/ \t/);
|
|
else
|
|
at = s.search(/ \t|\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+$/.test(s);
|
|
if (option.trailing && tw && !/^\s+$/.test(s)) {
|
|
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 (!option.scripturl && jx.test(value)) {
|
|
warningAt("Script URL.", line, from);
|
|
}
|
|
}
|
|
if (type === '(identifier)') {
|
|
t.identifier = true;
|
|
if (value === '__proto__' && !option.proto) {
|
|
warningAt("The '{a}' property is deprecated.",
|
|
line, from, value);
|
|
} else if (value === '__iterator__' && !option.iterator) {
|
|
warningAt("'{a}' is only available in JavaScript 1.7.",
|
|
line, from, value);
|
|
} else if (option.nomen && (value.charAt(0) === '_' ||
|
|
value.charAt(value.length - 1) === '_')) {
|
|
if (!option.node || token.id === '.' ||
|
|
(value !== '__dirname' && value !== '__filename')) {
|
|
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' ||
|
|
i === 'case');
|
|
}
|
|
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, isLiteral, isInRange;
|
|
|
|
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 = '', allowNewLine = false;
|
|
|
|
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;
|
|
unclosedString: for (;;) {
|
|
while (j >= s.length) {
|
|
j = 0;
|
|
|
|
var cl = line, cf = from;
|
|
if (!nextLine()) {
|
|
errorAt("Unclosed string.", cl, cf);
|
|
break unclosedString;
|
|
}
|
|
|
|
if (allowNewLine) {
|
|
allowNewLine = false;
|
|
} else {
|
|
warningAt("Unclosed string.", cl, cf);
|
|
}
|
|
}
|
|
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;
|
|
case '':
|
|
// last character is escape character
|
|
// always allow new line if escaped, but show
|
|
// warning if option is not set
|
|
allowNewLine = true;
|
|
if (option.multistr) {
|
|
if (jsonmode) {
|
|
warningAt("Avoid EOL escapement.", line, character);
|
|
}
|
|
c = '';
|
|
character -= 1;
|
|
break;
|
|
}
|
|
warningAt("Bad escapement of EOL. Use option multistr if needed.",
|
|
line, character);
|
|
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));
|
|
s = '';
|
|
}
|
|
} 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 '//':
|
|
s = '';
|
|
token.comment = true;
|
|
break;
|
|
|
|
// /* comment
|
|
|
|
case '/*':
|
|
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 quit('Stopping.', line, from);
|
|
case '/':
|
|
if (depth > 0) {
|
|
warningAt("{a} unterminated regular expression " +
|
|
"group(s).", line, from + l, depth);
|
|
}
|
|
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, '^');
|
|
}
|
|
}
|
|
if (c === ']') {
|
|
warningAt("Empty class.", line,
|
|
from + l - 1);
|
|
}
|
|
isLiteral = false;
|
|
isInRange = false;
|
|
klass: do {
|
|
c = s.charAt(l);
|
|
l += 1;
|
|
switch (c) {
|
|
case '[':
|
|
case '^':
|
|
warningAt("Unescaped '{a}'.",
|
|
line, from + l, c);
|
|
if (isInRange) {
|
|
isInRange = false;
|
|
} else {
|
|
isLiteral = true;
|
|
}
|
|
break;
|
|
case '-':
|
|
if (isLiteral && !isInRange) {
|
|
isLiteral = false;
|
|
isInRange = true;
|
|
} else if (isInRange) {
|
|
isInRange = false;
|
|
} else if (s.charAt(l) === ']') {
|
|
isInRange = true;
|
|
} else {
|
|
if (option.regexdash !== (l === 2 || (l === 3 &&
|
|
s.charAt(1) === '^'))) {
|
|
warningAt("Unescaped '{a}'.",
|
|
line, from + l - 1, '-');
|
|
}
|
|
isLiteral = true;
|
|
}
|
|
break;
|
|
case ']':
|
|
if (isInRange && !option.regexdash) {
|
|
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;
|
|
|
|
// \w, \s and \d are never part of a character range
|
|
if (/[wsd]/i.test(c)) {
|
|
if (isInRange) {
|
|
warningAt("Unescaped '{a}'.",
|
|
line, from + l, '-');
|
|
isInRange = false;
|
|
}
|
|
isLiteral = false;
|
|
} else if (isInRange) {
|
|
isInRange = false;
|
|
} else {
|
|
isLiteral = true;
|
|
}
|
|
break;
|
|
case '/':
|
|
warningAt("Unescaped '{a}'.",
|
|
line, from + l - 1, '/');
|
|
|
|
if (isInRange) {
|
|
isInRange = false;
|
|
} else {
|
|
isLiteral = true;
|
|
}
|
|
break;
|
|
case '<':
|
|
if (isInRange) {
|
|
isInRange = false;
|
|
} else {
|
|
isLiteral = true;
|
|
}
|
|
break;
|
|
default:
|
|
if (isInRange) {
|
|
isInRange = false;
|
|
} else {
|
|
isLiteral = 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 && type !== "exception")
|
|
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 (t.value === 'validthis') {
|
|
if (funct['(global)']) {
|
|
error("Option 'validthis' can't be used in a global scope.");
|
|
} else {
|
|
if (v.value === 'true' || v.value === 'false')
|
|
obj[t.value] = v.value === 'true';
|
|
else
|
|
error("Bad option value.", v);
|
|
}
|
|
} 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) {
|
|
left.from += (left.character - left.from);
|
|
warning("Unexpected space after '{a}'.", left, 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) {
|
|
left.from += (left.character - left.from);
|
|
warning("Missing space after '{a}'.",
|
|
left, 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) {
|
|
left.from += (left.character - left.from);
|
|
warning("Missing space after '{a}'.",
|
|
left, 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.laxcomma) {
|
|
if (comma.first) {
|
|
warning("Comma warnings can be turned off with 'laxcomma'");
|
|
comma.first = false;
|
|
}
|
|
warning("Bad line breaking before '{a}'.", token, nexttoken.id);
|
|
}
|
|
} else if (!token.comment && token.character !== nexttoken.from && option.white) {
|
|
token.from += (token.character - token.from);
|
|
warning("Unexpected space after '{a}'.", token, token.value);
|
|
}
|
|
advance(',');
|
|
nonadjacent(token, nexttoken);
|
|
}
|
|
|
|
comma.first = true;
|
|
|
|
|
|
// 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 (s === "in" && left.id === "!") {
|
|
warning("Confusing use of '{a}'.", left, '!');
|
|
}
|
|
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}'.", right, '!');
|
|
}
|
|
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 (option.esnext && funct[left.value] === 'const') {
|
|
warning("Attempting to override '{a}' which is a constant", left, left.value);
|
|
}
|
|
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') {
|
|
if (!option.latedef) {
|
|
break;
|
|
}
|
|
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;
|
|
|
|
if (t.id === ";") {
|
|
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) {
|
|
// If this is the last statement in a block that ends on
|
|
// the same line *and* option lastsemic is on, ignore the warning.
|
|
// Otherwise, complain about missing semicolon.
|
|
if (!option.lastsemic || nexttoken.id !== '}' ||
|
|
nexttoken.line !== token.line) {
|
|
warningAt("Missing semicolon.", token.line, token.character);
|
|
}
|
|
}
|
|
} else {
|
|
adjacent(token, nexttoken);
|
|
advance(';');
|
|
nonadjacent(token, nexttoken);
|
|
}
|
|
}
|
|
|
|
// Restore the indentation.
|
|
|
|
indent = i;
|
|
scope = s;
|
|
return r;
|
|
}
|
|
|
|
|
|
function statements(startLine) {
|
|
var a = [], f, p;
|
|
|
|
while (!nexttoken.reach && nexttoken.id !== '(end)') {
|
|
if (nexttoken.id === ';') {
|
|
p = peek();
|
|
if (!p || p.id !== "(") {
|
|
warning("Unnecessary semicolon.");
|
|
}
|
|
advance(';');
|
|
} else {
|
|
a.push(statement(startLine === nexttoken.line));
|
|
}
|
|
}
|
|
return a;
|
|
}
|
|
|
|
|
|
/*
|
|
* read all directives
|
|
* recognizes a simple form of asi, but always
|
|
* warns, if it is used
|
|
*/
|
|
function directives() {
|
|
var i, p, pn;
|
|
|
|
for (;;) {
|
|
if (nexttoken.id === "(string)") {
|
|
p = peek(0);
|
|
if (p.id === "(endline)") {
|
|
i = 1;
|
|
do {
|
|
pn = peek(i);
|
|
i = i + 1;
|
|
} while (pn.id === "(endline)");
|
|
|
|
if (pn.id !== ";") {
|
|
if (pn.id !== "(string)" && pn.id !== "(number)" &&
|
|
pn.id !== "(regexp)" && pn.identifier !== true &&
|
|
pn.id !== "}") {
|
|
break;
|
|
}
|
|
warning("Missing semicolon.", nexttoken);
|
|
} else {
|
|
p = pn;
|
|
}
|
|
} else if (p.id === "}") {
|
|
// directive with no other statements, warn about missing semicolon
|
|
warning("Missing semicolon.", p);
|
|
} else if (p.id !== ";") {
|
|
break;
|
|
}
|
|
|
|
indentation();
|
|
advance();
|
|
if (directive[token.value]) {
|
|
warning("Unnecessary directive \"{a}\".", token, token.value);
|
|
}
|
|
|
|
if (token.value === "use strict") {
|
|
option.newcap = true;
|
|
option.undef = true;
|
|
}
|
|
|
|
// there's no directive negation, so always set to true
|
|
directive[token.value] = true;
|
|
|
|
if (p.id === ";") {
|
|
advance(";");
|
|
}
|
|
continue;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* 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).
|
|
* isfunc - true if block is a function body
|
|
*/
|
|
function block(ordinary, stmt, isfunc) {
|
|
var a,
|
|
b = inblock,
|
|
old_indent = indent,
|
|
m,
|
|
s = scope,
|
|
t,
|
|
line,
|
|
d;
|
|
|
|
inblock = ordinary;
|
|
if (!ordinary || !option.funcscope) scope = Object.create(scope);
|
|
nonadjacent(token, nexttoken);
|
|
t = nexttoken;
|
|
|
|
if (nexttoken.id === '{') {
|
|
advance('{');
|
|
line = token.line;
|
|
if (nexttoken.id !== '}') {
|
|
indent += option.indent;
|
|
while (!ordinary && nexttoken.from > indent) {
|
|
indent += option.indent;
|
|
}
|
|
|
|
if (isfunc) {
|
|
m = {};
|
|
for (d in directive) {
|
|
if (is_own(directive, d)) {
|
|
m[d] = directive[d];
|
|
}
|
|
}
|
|
directives();
|
|
|
|
if (option.strict && funct['(context)']['(global)']) {
|
|
if (!m["use strict"] && !directive["use strict"]) {
|
|
warning("Missing \"use strict\" statement.");
|
|
}
|
|
}
|
|
}
|
|
|
|
a = statements(line);
|
|
|
|
if (isfunc) {
|
|
directive = m;
|
|
}
|
|
|
|
indent -= option.indent;
|
|
if (line !== nexttoken.line) {
|
|
indentation();
|
|
}
|
|
} else if (line !== nexttoken.line) {
|
|
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;
|
|
indent += option.indent;
|
|
// test indentation only if statement is in new line
|
|
a = [statement(nexttoken.line === token.line)];
|
|
indent -= option.indent;
|
|
noreach = false;
|
|
}
|
|
funct['(verb)'] = null;
|
|
if (!ordinary || !option.funcscope) 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;
|
|
}
|
|
} else if (funct['(global)']) {
|
|
// 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.
|
|
|
|
if (option.undef && typeof predefined[v] !== 'boolean') {
|
|
// Attempting to subscript a null reference will throw an
|
|
// error, even within the typeof and delete operators
|
|
if (!(anonname === 'typeof' || anonname === 'delete') ||
|
|
(nexttoken && (nexttoken.value === '.' || nexttoken.value === '['))) {
|
|
|
|
isundef(funct, "'{a}' is not defined.", token, v);
|
|
}
|
|
}
|
|
note_implied(token);
|
|
} else {
|
|
// If the name is already defined in the current
|
|
// function, but not as outer, then there is a scope error.
|
|
|
|
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 (option.undef) {
|
|
// Attempting to subscript a null reference will throw an
|
|
// error, even within the typeof and delete operators
|
|
if (!(anonname === 'typeof' || anonname === 'delete') ||
|
|
(nexttoken &&
|
|
(nexttoken.value === '.' || nexttoken.value === '['))) {
|
|
|
|
isundef(funct, "'{a}' is not defined.", token, v);
|
|
}
|
|
}
|
|
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 (directive['use strict'] && funct['(global)']) {
|
|
warning("Strict violation.", x);
|
|
}
|
|
});
|
|
reservevar('eval');
|
|
reservevar('false');
|
|
reservevar('Infinity');
|
|
reservevar('NaN');
|
|
reservevar('null');
|
|
reservevar('this', function (x) {
|
|
if (directive['use strict'] && !option.validthis && ((funct['(statement)'] &&
|
|
funct['(name)'].charAt(0) > 'Z') || funct['(global)'])) {
|
|
warning("Possible 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) {
|
|
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('<');
|
|
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 (!option.scripturl && 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 (left && left.value === 'arguments' && (m === 'callee' || m === 'caller')) {
|
|
if (option.noarg)
|
|
warning("Avoid arguments.{a}.", left, m);
|
|
else if (directive['use strict'])
|
|
error('Strict violation.');
|
|
} 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(')');
|
|
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, false, true);
|
|
scope = oldScope;
|
|
option = oldOption;
|
|
funct['(last)'] = token.line;
|
|
funct = funct['(context)'];
|
|
return f;
|
|
}
|
|
|
|
|
|
(function (x) {
|
|
x.nud = function () {
|
|
var b, f, i, j, p, t;
|
|
var props = {}; // All properties, including accessors
|
|
|
|
function saveProperty(name, token) {
|
|
if (props[name] && is_own(props, name))
|
|
warning("Duplicate member '{a}'.", nexttoken, i);
|
|
else
|
|
props[name] = {};
|
|
|
|
props[name].basic = true;
|
|
props[name].basicToken = token;
|
|
}
|
|
|
|
function saveSetter(name, token) {
|
|
if (props[name] && is_own(props, name)) {
|
|
if (props[name].basic || props[name].setter)
|
|
warning("Duplicate member '{a}'.", nexttoken, i);
|
|
} else {
|
|
props[name] = {};
|
|
}
|
|
|
|
props[name].setter = true;
|
|
props[name].setterToken = token;
|
|
}
|
|
|
|
function saveGetter(name) {
|
|
if (props[name] && is_own(props, name)) {
|
|
if (props[name].basic || props[name].getter)
|
|
warning("Duplicate member '{a}'.", nexttoken, i);
|
|
} else {
|
|
props[name] = {};
|
|
}
|
|
|
|
props[name].getter = true;
|
|
props[name].getterToken = token;
|
|
}
|
|
|
|
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.");
|
|
}
|
|
saveGetter(i);
|
|
t = nexttoken;
|
|
adjacent(token, nexttoken);
|
|
f = doFunction();
|
|
p = f['(params)'];
|
|
if (p) {
|
|
warning("Unexpected parameter '{a}' in get {b} function.", t, p[0], i);
|
|
}
|
|
adjacent(token, nexttoken);
|
|
} else if (nexttoken.value === 'set' && peek().id !== ':') {
|
|
advance('set');
|
|
if (!option.es5) {
|
|
error("get/set are ES5 features.");
|
|
}
|
|
i = property_name();
|
|
if (!i) {
|
|
error("Missing property name.");
|
|
}
|
|
saveSetter(i, nexttoken);
|
|
t = nexttoken;
|
|
adjacent(token, nexttoken);
|
|
f = doFunction();
|
|
p = f['(params)'];
|
|
if (!p || p.length !== 1) {
|
|
warning("Expected a single parameter in set {a} function.", t, i);
|
|
}
|
|
} else {
|
|
i = property_name();
|
|
saveProperty(i, nexttoken);
|
|
if (typeof i !== 'string') {
|
|
break;
|
|
}
|
|
advance(':');
|
|
nonadjacent(token, nexttoken);
|
|
expression(10);
|
|
}
|
|
|
|
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);
|
|
|
|
// Check for lonely setters if in the ES5 mode.
|
|
if (option.es5) {
|
|
for (var name in props) {
|
|
if (is_own(props, name) && props[name].setter && !props[name].getter) {
|
|
warning("Setter is defined without getter.", props[name].setterToken);
|
|
}
|
|
}
|
|
}
|
|
return this;
|
|
};
|
|
x.fud = function () {
|
|
error("Expected to see a statement and instead saw a block.", token);
|
|
};
|
|
}(delim('{')));
|
|
|
|
// This Function is called when esnext option is set to true
|
|
// it adds the `const` statement to JSHINT
|
|
|
|
useESNextSyntax = function () {
|
|
var conststatement = stmt('const', function (prefix) {
|
|
var id, name, value;
|
|
|
|
this.first = [];
|
|
for (;;) {
|
|
nonadjacent(token, nexttoken);
|
|
id = identifier();
|
|
if (funct[id] === "const") {
|
|
warning("const '" + id + "' has already been declared");
|
|
}
|
|
if (funct['(global)'] && predefined[id] === false) {
|
|
warning("Redefinition of '{a}'.", token, id);
|
|
}
|
|
addlabel(id, 'const');
|
|
if (prefix) {
|
|
break;
|
|
}
|
|
name = token;
|
|
this.first.push(token);
|
|
|
|
if (nexttoken.id !== "=") {
|
|
warning("const " +
|
|
"'{a}' is initialized to 'undefined'.", token, id);
|
|
}
|
|
|
|
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("Constant {a} was not declared correctly.",
|
|
nexttoken, nexttoken.value);
|
|
}
|
|
value = expression(0);
|
|
name.first = value;
|
|
}
|
|
|
|
if (nexttoken.id !== ',') {
|
|
break;
|
|
}
|
|
comma();
|
|
}
|
|
return this;
|
|
});
|
|
conststatement.exps = true;
|
|
};
|
|
|
|
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 (option.esnext && funct[id] === "const") {
|
|
warning("const '" + id + "' has already been declared");
|
|
}
|
|
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();
|
|
if (option.esnext && funct[i] === "const") {
|
|
warning("const '" + i + "' has already been declared");
|
|
}
|
|
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') {
|
|
if (!option.onecase)
|
|
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 ':':
|
|
g = false;
|
|
statements();
|
|
break;
|
|
default:
|
|
error("Missing ':' on a case clause.", token);
|
|
return;
|
|
}
|
|
} else {
|
|
if (token.id === ':') {
|
|
advance(':');
|
|
error("Unexpected '{a}'.", token, ':');
|
|
statements();
|
|
} else {
|
|
error("Expected '{a}' and instead saw '{b}'.",
|
|
nexttoken, 'case', nexttoken.value);
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}).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 && (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);
|
|
|
|
if (!option.asi)
|
|
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);
|
|
|
|
if (!option.asi)
|
|
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 () {
|
|
if (this.line === nexttoken.line) {
|
|
if (nexttoken.id === '(regexp)')
|
|
warning("Wrap the /regexp/ literal in parens to disambiguate the slash operator.");
|
|
|
|
if (nexttoken.id !== ';' && !nexttoken.reach) {
|
|
nonadjacent(token, nexttoken);
|
|
if (peek().value === "=" && !option.boss) {
|
|
warningAt("Did you mean to return a conditional instead of an assignment?",
|
|
token.line, token.character + 1);
|
|
}
|
|
this.first = expression(0);
|
|
}
|
|
} else if (!option.asi) {
|
|
nolinebreak(this); // always warn (Line breaking error)
|
|
}
|
|
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__' &&
|
|
!option.proto) || (nexttoken.value === '__iterator__' &&
|
|
!option.iterator)) {
|
|
warning("The '{a}' key may produce unexpected results.",
|
|
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 = [];
|
|
JSHINT.undefs = [];
|
|
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[i]];
|
|
}
|
|
}
|
|
}
|
|
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 = [];
|
|
stack = null;
|
|
member = {};
|
|
membersOnly = null;
|
|
implied = {};
|
|
inblock = false;
|
|
lookahead = [];
|
|
jsonmode = false;
|
|
warnings = 0;
|
|
lex.init(s);
|
|
prereg = true;
|
|
directive = {};
|
|
|
|
prevtoken = token = nexttoken = syntax['(begin)'];
|
|
assume();
|
|
|
|
// combine the passed globals after we've assumed all our options
|
|
combine(predefined, g || {});
|
|
|
|
try {
|
|
advance();
|
|
switch (nexttoken.id) {
|
|
case '{':
|
|
case '[':
|
|
option.laxbreak = true;
|
|
jsonmode = true;
|
|
jsonValue();
|
|
break;
|
|
default:
|
|
directives();
|
|
if (directive["use strict"] && !option.globalstrict) {
|
|
warning("Use the function form of \"use strict\".", prevtoken);
|
|
}
|
|
|
|
statements();
|
|
}
|
|
advance('(end)');
|
|
|
|
var isDefined = function (name, context) {
|
|
do {
|
|
if (typeof context[name] === 'string')
|
|
return true;
|
|
|
|
context = context['(context)'];
|
|
} while (context);
|
|
|
|
return false;
|
|
};
|
|
|
|
// Check queued 'x is not defined' instances to see if they're still undefined.
|
|
for (i = 0; i < JSHINT.undefs.length; i += 1) {
|
|
k = JSHINT.undefs[i].slice(0);
|
|
|
|
if (!isDefined(k[2].value, k[0])) {
|
|
warning.apply(warning, k.slice(1));
|
|
}
|
|
}
|
|
} catch (e) {
|
|
if (e) {
|
|
var nt = nexttoken || {};
|
|
JSHINT.errors.push({
|
|
raw : e.raw,
|
|
reason : e.message,
|
|
line : e.line || nt.line,
|
|
character : e.character || nt.from
|
|
}, null);
|
|
}
|
|
}
|
|
|
|
return JSHINT.errors.length === 0;
|
|
};
|
|
|
|
// Data summary.
|
|
itself.data = function () {
|
|
|
|
var data = { functions: [], options: option }, 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;
|
|
|
|
return itself;
|
|
}());
|
|
|
|
// Make JSHINT a Node module, if possible.
|
|
if (typeof exports === 'object' && exports)
|
|
exports.JSHINT = JSHINT; |