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How to use isQuantifierNext method in redwood

Best JavaScript code snippet using redwood

xregexp.js

Source:xregexp.js

...200 * @param {Number} pos Index in `pattern` to search at.201 * @param {String} flags Flags used by the pattern.202 * @returns {Boolean} Whether the next token is a quantifier.203 */204    function isQuantifierNext(pattern, pos, flags) {205        return nativ.test.call(206            flags.indexOf('x') > -1 ?207                // Ignore any leading whitespace, line comments, and inline comments208                /^(?:\s+|#.*|\(\?#[^)]*\))*(?:[?*+]|{\d+(?:,\d*)?})/ :209                // Ignore any leading inline comments210                /^(?:\(\?#[^)]*\))*(?:[?*+]|{\d+(?:,\d*)?})/,211            pattern.slice(pos)212        );213    }214/**215 * Checks for flag-related errors, and strips/applies flags in a leading mode modifier. Offloads216 * the flag preparation logic from the `XRegExp` constructor.217 *218 * @private219 * @param {String} pattern Regex pattern, possibly with a leading mode modifier.220 * @param {String} flags Any combination of flags.221 * @returns {Object} Object with properties `pattern` and `flags`.222 */223    function prepareFlags(pattern, flags) {224        var i;225        // Recent browsers throw on duplicate flags, so copy this behavior for nonnative flags226        if (clipDuplicates(flags) !== flags) {227            throw new SyntaxError('Invalid duplicate regex flag ' + flags);228        }229        // Strip and apply a leading mode modifier with any combination of flags except g or y230        pattern = nativ.replace.call(pattern, /^\(\?([\w$]+)\)/, function($0, $1) {231            if (nativ.test.call(/[gy]/, $1)) {232                throw new SyntaxError('Cannot use flag g or y in mode modifier ' + $0);233            }234            // Allow duplicate flags within the mode modifier235            flags = clipDuplicates(flags + $1);236            return '';237        });238        // Throw on unknown native or nonnative flags239        for (i = 0; i < flags.length; ++i) {240            if (!registeredFlags[flags.charAt(i)]) {241                throw new SyntaxError('Unknown regex flag ' + flags.charAt(i));242            }243        }244        return {245            pattern: pattern,246            flags: flags247        };248    }249/**250 * Prepares an options object from the given value.251 *252 * @private253 * @param {String|Object} value Value to convert to an options object.254 * @returns {Object} Options object.255 */256    function prepareOptions(value) {257        value = value || {};258        if (isType(value, 'String')) {259            value = self.forEach(value, /[^\s,]+/, function(match) {260                this[match] = true;261            }, {});262        }263        return value;264    }265/**266 * Registers a flag so it doesn't throw an 'unknown flag' error.267 *268 * @private269 * @param {String} flag Single-character flag to register.270 */271    function registerFlag(flag) {272        if (!/^[\w$]$/.test(flag)) {273            throw new Error('Flag must be a single character A-Za-z0-9_$');274        }275        registeredFlags[flag] = true;276    }277/**278 * Runs built-in and custom regex syntax tokens in reverse insertion order at the specified279 * position, until a match is found.280 *281 * @private282 * @param {String} pattern Original pattern from which an XRegExp object is being built.283 * @param {String} flags Flags being used to construct the regex.284 * @param {Number} pos Position to search for tokens within `pattern`.285 * @param {Number} scope Regex scope to apply: 'default' or 'class'.286 * @param {Object} context Context object to use for token handler functions.287 * @returns {Object} Object with properties `matchLength`, `output`, and `reparse`; or `null`.288 */289    function runTokens(pattern, flags, pos, scope, context) {290        var i = tokens.length,291            result = null,292            match,293            t;294        // Run in reverse insertion order295        while (i--) {296            t = tokens[i];297            if (298                (t.scope === scope || t.scope === 'all') &&299                (!t.flag || flags.indexOf(t.flag) > -1)300            ) {301                match = self.exec(pattern, t.regex, pos, 'sticky');302                if (match) {303                    result = {304                        matchLength: match[0].length,305                        output: t.handler.call(context, match, scope, flags),306                        reparse: t.reparse307                    };308                    // Finished with token tests309                    break;310                }311            }312        }313        return result;314    }315/**316 * Enables or disables implicit astral mode opt-in.317 *318 * @private319 * @param {Boolean} on `true` to enable; `false` to disable.320 */321    function setAstral(on) {322        // Reset the pattern cache used by the `XRegExp` constructor, since the same pattern and323        // flags might now produce different results324        self.cache.flush('patterns');325        features.astral = on;326    }327/**328 * Enables or disables native method overrides.329 *330 * @private331 * @param {Boolean} on `true` to enable; `false` to disable.332 */333    function setNatives(on) {334        RegExp.prototype.exec = (on ? fixed : nativ).exec;335        RegExp.prototype.test = (on ? fixed : nativ).test;336        String.prototype.match = (on ? fixed : nativ).match;337        String.prototype.replace = (on ? fixed : nativ).replace;338        String.prototype.split = (on ? fixed : nativ).split;339        features.natives = on;340    }341/**342 * Returns the object, or throws an error if it is `null` or `undefined`. This is used to follow343 * the ES5 abstract operation `ToObject`.344 *345 * @private346 * @param {*} value Object to check and return.347 * @returns {*} The provided object.348 */349    function toObject(value) {350        // This matches both `null` and `undefined`351        if (value == null) {352            throw new TypeError('Cannot convert null or undefined to object');353        }354        return value;355    }356/* ==============================357 * Constructor358 * ============================== */359/**360 * Creates an extended regular expression object for matching text with a pattern. Differs from a361 * native regular expression in that additional syntax and flags are supported. The returned object362 * is in fact a native `RegExp` and works with all native methods.363 *364 * @class XRegExp365 * @constructor366 * @param {String|RegExp} pattern Regex pattern string, or an existing regex object to copy.367 * @param {String} [flags] Any combination of flags.368 *   Native flags:369 *     <li>`g` - global370 *     <li>`i` - ignore case371 *     <li>`m` - multiline anchors372 *     <li>`y` - sticky (Firefox 3+)373 *   Additional XRegExp flags:374 *     <li>`n` - explicit capture375 *     <li>`s` - dot matches all (aka singleline)376 *     <li>`x` - free-spacing and line comments (aka extended)377 *     <li>`A` - astral (requires the Unicode Base addon)378 *   Flags cannot be provided when constructing one `RegExp` from another.379 * @returns {RegExp} Extended regular expression object.380 * @example381 *382 * // With named capture and flag x383 * XRegExp('(?<year>  [0-9]{4} ) -?  # year  \n\384 *          (?<month> [0-9]{2} ) -?  # month \n\385 *          (?<day>   [0-9]{2} )     # day   ', 'x');386 *387 * // Providing a regex object copies it. Native regexes are recompiled using native (not XRegExp)388 * // syntax. Copies maintain special properties for named capture, are augmented with389 * // `XRegExp.prototype` methods, and have fresh `lastIndex` properties (set to zero).390 * XRegExp(/regex/);391 */392    self = function(pattern, flags) {393        var context = {394                hasNamedCapture: false,395                captureNames: []396            },397            scope = defaultScope,398            output = '',399            pos = 0,400            result,401            token,402            key;403        if (self.isRegExp(pattern)) {404            if (flags !== undefined) {405                throw new TypeError('Cannot supply flags when copying a RegExp');406            }407            return copy(pattern, {addProto: true});408        }409        // Copy the argument behavior of `RegExp`410        pattern = pattern === undefined ? '' : String(pattern);411        flags = flags === undefined ? '' : String(flags);412        // Cache-lookup key; intentionally using an invalid regex sequence as the separator413        key = pattern + '***' + flags;414        if (!patternCache[key]) {415            // Check for flag-related errors, and strip/apply flags in a leading mode modifier416            result = prepareFlags(pattern, flags);417            pattern = result.pattern;418            flags = result.flags;419            // Use XRegExp's syntax tokens to translate the pattern to a native regex pattern...420            // `pattern.length` may change on each iteration, if tokens use the `reparse` option421            while (pos < pattern.length) {422                do {423                    // Check for custom tokens at the current position424                    result = runTokens(pattern, flags, pos, scope, context);425                    // If the matched token used the `reparse` option, splice its output into the426                    // pattern before running tokens again at the same position427                    if (result && result.reparse) {428                        pattern = pattern.slice(0, pos) +429                            result.output +430                            pattern.slice(pos + result.matchLength);431                    }432                } while (result && result.reparse);433                if (result) {434                    output += result.output;435                    pos += (result.matchLength || 1);436                } else {437                    // Get the native token at the current position438                    token = self.exec(pattern, nativeTokens[scope], pos, 'sticky')[0];439                    output += token;440                    pos += token.length;441                    if (token === '[' && scope === defaultScope) {442                        scope = classScope;443                    } else if (token === ']' && scope === classScope) {444                        scope = defaultScope;445                    }446                }447            }448            patternCache[key] = {449                // Cleanup token cruft: repeated `(?:)(?:)` and leading/trailing `(?:)`450                pattern: nativ.replace.call(output, /\(\?:\)(?=\(\?:\))|^\(\?:\)|\(\?:\)$/g, ''),451                // Strip all but native flags452                flags: nativ.replace.call(flags, /[^gimy]+/g, ''),453                // `context.captureNames` has an item for each capturing group, even if unnamed454                captures: context.hasNamedCapture ? context.captureNames : null455            }456        }457        key = patternCache[key];458        return augment(new RegExp(key.pattern, key.flags), key.captures, /*addProto*/ true);459    };460// Add `RegExp.prototype` to the prototype chain461    self.prototype = new RegExp;462/* ==============================463 * Public properties464 * ============================== */465/**466 * The XRegExp version number.467 *468 * @static469 * @memberOf XRegExp470 * @type String471 */472    self.version = '3.0.0-pre';473/* ==============================474 * Public methods475 * ============================== */476/**477 * Extends XRegExp syntax and allows custom flags. This is used internally and can be used to478 * create XRegExp addons. If more than one token can match the same string, the last added wins.479 *480 * @memberOf XRegExp481 * @param {RegExp} regex Regex object that matches the new token.482 * @param {Function} handler Function that returns a new pattern string (using native regex syntax)483 *   to replace the matched token within all future XRegExp regexes. Has access to persistent484 *   properties of the regex being built, through `this`. Invoked with three arguments:485 *   <li>The match array, with named backreference properties.486 *   <li>The regex scope where the match was found: 'default' or 'class'.487 *   <li>The flags used by the regex, including any flags in a leading mode modifier.488 *   The handler function becomes part of the XRegExp construction process, so be careful not to489 *   construct XRegExps within the function or you will trigger infinite recursion.490 * @param {Object} [options] Options object with optional properties:491 *   <li>`scope` {String} Scope where the token applies: 'default', 'class', or 'all'.492 *   <li>`flag` {String} Single-character flag that triggers the token. This also registers the493 *     flag, which prevents XRegExp from throwing an 'unknown flag' error when the flag is used.494 *   <li>`optionalFlags` {String} Any custom flags checked for within the token `handler` that are495 *     not required to trigger the token. This registers the flags, to prevent XRegExp from496 *     throwing an 'unknown flag' error when any of the flags are used.497 *   <li>`reparse` {Boolean} Whether the `handler` function's output should not be treated as498 *     final, and instead be reparseable by other tokens (including the current token). Allows499 *     token chaining or deferring.500 * @example501 *502 * // Basic usage: Add \a for the ALERT control code503 * XRegExp.addToken(504 *   /\\a/,505 *   function() {return '\\x07';},506 *   {scope: 'all'}507 * );508 * XRegExp('\\a[\\a-\\n]+').test('\x07\n\x07'); // -> true509 *510 * // Add the U (ungreedy) flag from PCRE and RE2, which reverses greedy and lazy quantifiers511 * XRegExp.addToken(512 *   /([?*+]|{\d+(?:,\d*)?})(\??)/,513 *   function(match) {return match[1] + (match[2] ? '' : '?');},514 *   {flag: 'U'}515 * );516 * XRegExp('a+', 'U').exec('aaa')[0]; // -> 'a'517 * XRegExp('a+?', 'U').exec('aaa')[0]; // -> 'aaa'518 */519    self.addToken = function(regex, handler, options) {520        options = options || {};521        var optionalFlags = options.optionalFlags, i;522        if (options.flag) {523            registerFlag(options.flag);524        }525        if (optionalFlags) {526            optionalFlags = nativ.split.call(optionalFlags, '');527            for (i = 0; i < optionalFlags.length; ++i) {528                registerFlag(optionalFlags[i]);529            }530        }531        // Add to the private list of syntax tokens532        tokens.push({533            regex: copy(regex, {add: 'g' + (hasNativeY ? 'y' : '')}),534            handler: handler,535            scope: options.scope || defaultScope,536            flag: options.flag,537            reparse: options.reparse538        });539        // Reset the pattern cache used by the `XRegExp` constructor, since the same pattern and540        // flags might now produce different results541        self.cache.flush('patterns');542    };543/**544 * Caches and returns the result of calling `XRegExp(pattern, flags)`. On any subsequent call with545 * the same pattern and flag combination, the cached copy of the regex is returned.546 *547 * @memberOf XRegExp548 * @param {String} pattern Regex pattern string.549 * @param {String} [flags] Any combination of XRegExp flags.550 * @returns {RegExp} Cached XRegExp object.551 * @example552 *553 * while (match = XRegExp.cache('.', 'gs').exec(str)) {554 *   // The regex is compiled once only555 * }556 */557    self.cache = function(pattern, flags) {558        var key = pattern + '***' + (flags || '');559        return cache[key] || (cache[key] = self(pattern, flags));560    };561// Intentionally undocumented562    self.cache.flush = function(cacheName) {563        if (cacheName === 'patterns') {564            // Flush the pattern cache used by the `XRegExp` constructor565            patternCache = {};566        } else {567            // Flush the regex object cache populated by `XRegExp.cache`568            cache = {};569        }570    };571/**572 * Escapes any regular expression metacharacters, for use when matching literal strings. The result573 * can safely be used at any point within a regex that uses any flags.574 *575 * @memberOf XRegExp576 * @param {String} str String to escape.577 * @returns {String} String with regex metacharacters escaped.578 * @example579 *580 * XRegExp.escape('Escaped? <.>');581 * // -> 'Escaped\?\ <\.>'582 */583    self.escape = function(str) {584        return nativ.replace.call(toObject(str), /[-[\]{}()*+?.,\\^$|#\s]/g, '\\$&');585    };586/**587 * Executes a regex search in a specified string. Returns a match array or `null`. If the provided588 * regex uses named capture, named backreference properties are included on the match array.589 * Optional `pos` and `sticky` arguments specify the search start position, and whether the match590 * must start at the specified position only. The `lastIndex` property of the provided regex is not591 * used, but is updated for compatibility. Also fixes browser bugs compared to the native592 * `RegExp.prototype.exec` and can be used reliably cross-browser.593 *594 * @memberOf XRegExp595 * @param {String} str String to search.596 * @param {RegExp} regex Regex to search with.597 * @param {Number} [pos=0] Zero-based index at which to start the search.598 * @param {Boolean|String} [sticky=false] Whether the match must start at the specified position599 *   only. The string `'sticky'` is accepted as an alternative to `true`.600 * @returns {Array} Match array with named backreference properties, or `null`.601 * @example602 *603 * // Basic use, with named backreference604 * var match = XRegExp.exec('U+2620', XRegExp('U\\+(?<hex>[0-9A-F]{4})'));605 * match.hex; // -> '2620'606 *607 * // With pos and sticky, in a loop608 * var pos = 2, result = [], match;609 * while (match = XRegExp.exec('<1><2><3><4>5<6>', /<(\d)>/, pos, 'sticky')) {610 *   result.push(match[1]);611 *   pos = match.index + match[0].length;612 * }613 * // result -> ['2', '3', '4']614 */615    self.exec = function(str, regex, pos, sticky) {616        var cacheFlags = 'g', match, r2;617        if (hasNativeY && (sticky || (regex.sticky && sticky !== false))) {618            cacheFlags += 'y';619        }620        regex[REGEX_DATA] = regex[REGEX_DATA] || getBaseProps();621        // Shares cached copies with `XRegExp.match`/`replace`622        r2 = regex[REGEX_DATA][cacheFlags] || (623            regex[REGEX_DATA][cacheFlags] = copy(regex, {624                add: cacheFlags,625                remove: sticky === false ? 'y' : ''626            })627        );628        r2.lastIndex = pos = pos || 0;629        // Fixed `exec` required for `lastIndex` fix, named backreferences, etc.630        match = fixed.exec.call(r2, str);631        if (sticky && match && match.index !== pos) {632            match = null;633        }634        if (regex.global) {635            regex.lastIndex = match ? r2.lastIndex : 0;636        }637        return match;638    };639/**640 * Executes a provided function once per regex match.641 *642 * @memberOf XRegExp643 * @param {String} str String to search.644 * @param {RegExp} regex Regex to search with.645 * @param {Function} callback Function to execute for each match. Invoked with four arguments:646 *   <li>The match array, with named backreference properties.647 *   <li>The zero-based match index.648 *   <li>The string being traversed.649 *   <li>The regex object being used to traverse the string.650 * @param {*} [context] Object to use as `this` when executing `callback`.651 * @returns {*} Provided `context` object.652 * @example653 *654 * // Extracts every other digit from a string655 * XRegExp.forEach('1a2345', /\d/, function(match, i) {656 *   if (i % 2) this.push(+match[0]);657 * }, []);658 * // -> [2, 4]659 */660    self.forEach = function(str, regex, callback, context) {661        var pos = 0,662            i = -1,663            match;664        while ((match = self.exec(str, regex, pos))) {665            // Because `regex` is provided to `callback`, the function can use the deprecated/666            // nonstandard `RegExp.prototype.compile` to mutate the regex. However, since667            // `XRegExp.exec` doesn't use `lastIndex` to set the search position, this can't lead668            // to an infinite loop, at least. Actually, because of the way `XRegExp.exec` caches669            // globalized versions of regexes, mutating the regex will not have any effect on the670            // iteration or matched strings, which is a nice side effect that brings extra safety671            callback.call(context, match, ++i, str, regex);672            pos = match.index + (match[0].length || 1);673        }674        return context;675    };676/**677 * Copies a regex object and adds flag `g`. The copy maintains special properties for named678 * capture, is augmented with `XRegExp.prototype` methods, and has a fresh `lastIndex` property679 * (set to zero). Native regexes are not recompiled using XRegExp syntax.680 *681 * @memberOf XRegExp682 * @param {RegExp} regex Regex to globalize.683 * @returns {RegExp} Copy of the provided regex with flag `g` added.684 * @example685 *686 * var globalCopy = XRegExp.globalize(/regex/);687 * globalCopy.global; // -> true688 */689    self.globalize = function(regex) {690        return copy(regex, {add: 'g', addProto: true});691    };692/**693 * Installs optional features according to the specified options. Can be undone using694 * {@link #XRegExp.uninstall}.695 *696 * @memberOf XRegExp697 * @param {Object|String} options Options object or string.698 * @example699 *700 * // With an options object701 * XRegExp.install({702 *   // Enables support for astral code points in Unicode addons (implicitly sets flag A)703 *   astral: true,704 *705 *   // Overrides native regex methods with fixed/extended versions that support named706 *   // backreferences and fix numerous cross-browser bugs707 *   natives: true708 * });709 *710 * // With an options string711 * XRegExp.install('astral natives');712 */713    self.install = function(options) {714        options = prepareOptions(options);715        if (!features.astral && options.astral) {716            setAstral(true);717        }718        if (!features.natives && options.natives) {719            setNatives(true);720        }721    };722/**723 * Checks whether an individual optional feature is installed.724 *725 * @memberOf XRegExp726 * @param {String} feature Name of the feature to check. One of:727 *   <li>`natives`728 *   <li>`astral`729 * @returns {Boolean} Whether the feature is installed.730 * @example731 *732 * XRegExp.isInstalled('natives');733 */734    self.isInstalled = function(feature) {735        return !!(features[feature]);736    };737/**738 * Returns `true` if an object is a regex; `false` if it isn't. This works correctly for regexes739 * created in another frame, when `instanceof` and `constructor` checks would fail.740 *741 * @memberOf XRegExp742 * @param {*} value Object to check.743 * @returns {Boolean} Whether the object is a `RegExp` object.744 * @example745 *746 * XRegExp.isRegExp('string'); // -> false747 * XRegExp.isRegExp(/regex/i); // -> true748 * XRegExp.isRegExp(RegExp('^', 'm')); // -> true749 * XRegExp.isRegExp(XRegExp('(?s).')); // -> true750 */751    self.isRegExp = function(value) {752        return toString.call(value) === '[object RegExp]';753        //return isType(value, 'RegExp');754    };755/**756 * Returns the first matched string, or in global mode, an array containing all matched strings.757 * This is essentially a more convenient re-implementation of `String.prototype.match` that gives758 * the result types you actually want (string instead of `exec`-style array in match-first mode,759 * and an empty array instead of `null` when no matches are found in match-all mode). It also lets760 * you override flag g and ignore `lastIndex`, and fixes browser bugs.761 *762 * @memberOf XRegExp763 * @param {String} str String to search.764 * @param {RegExp} regex Regex to search with.765 * @param {String} [scope='one'] Use 'one' to return the first match as a string. Use 'all' to766 *   return an array of all matched strings. If not explicitly specified and `regex` uses flag g,767 *   `scope` is 'all'.768 * @returns {String|Array} In match-first mode: First match as a string, or `null`. In match-all769 *   mode: Array of all matched strings, or an empty array.770 * @example771 *772 * // Match first773 * XRegExp.match('abc', /\w/); // -> 'a'774 * XRegExp.match('abc', /\w/g, 'one'); // -> 'a'775 * XRegExp.match('abc', /x/g, 'one'); // -> null776 *777 * // Match all778 * XRegExp.match('abc', /\w/g); // -> ['a', 'b', 'c']779 * XRegExp.match('abc', /\w/, 'all'); // -> ['a', 'b', 'c']780 * XRegExp.match('abc', /x/, 'all'); // -> []781 */782    self.match = function(str, regex, scope) {783        var global = (regex.global && scope !== 'one') || scope === 'all',784            cacheFlags = (global ? 'g' : '') + (regex.sticky ? 'y' : ''),785            result,786            r2;787        regex[REGEX_DATA] = regex[REGEX_DATA] || getBaseProps();788        // Shares cached copies with `XRegExp.exec`/`replace`789        r2 = regex[REGEX_DATA][cacheFlags || 'noGY'] || (790            regex[REGEX_DATA][cacheFlags || 'noGY'] = copy(regex, {791                add: cacheFlags,792                remove: scope === 'one' ? 'g' : ''793            })794        );795        result = nativ.match.call(toObject(str), r2);796        if (regex.global) {797            regex.lastIndex = (798                (scope === 'one' && result) ?799                    // Can't use `r2.lastIndex` since `r2` is nonglobal in this case800                    (result.index + result[0].length) : 0801            );802        }803        return global ? (result || []) : (result && result[0]);804    };805/**806 * Retrieves the matches from searching a string using a chain of regexes that successively search807 * within previous matches. The provided `chain` array can contain regexes and objects with `regex`808 * and `backref` properties. When a backreference is specified, the named or numbered backreference809 * is passed forward to the next regex or returned.810 *811 * @memberOf XRegExp812 * @param {String} str String to search.813 * @param {Array} chain Regexes that each search for matches within preceding results.814 * @returns {Array} Matches by the last regex in the chain, or an empty array.815 * @example816 *817 * // Basic usage; matches numbers within <b> tags818 * XRegExp.matchChain('1 <b>2</b> 3 <b>4 a 56</b>', [819 *   XRegExp('(?is)<b>.*?</b>'),820 *   /\d+/821 * ]);822 * // -> ['2', '4', '56']823 *824 * // Passing forward and returning specific backreferences825 * html = '<a href="http://xregexp.com/api/">XRegExp</a>\826 *         <a href="http://www.google.com/">Google</a>';827 * XRegExp.matchChain(html, [828 *   {regex: /<a href="([^"]+)">/i, backref: 1},829 *   {regex: XRegExp('(?i)^https?://(?<domain>[^/?#]+)'), backref: 'domain'}830 * ]);831 * // -> ['xregexp.com', 'www.google.com']832 */833    self.matchChain = function(str, chain) {834        return (function recurseChain(values, level) {835            var item = chain[level].regex ? chain[level] : {regex: chain[level]},836                matches = [],837                addMatch = function(match) {838                    if (item.backref) {839                        /* Safari 4.0.5 (but not 5.0.5+) inappropriately uses sparse arrays to hold840                         * the `undefined`s for backreferences to nonparticipating capturing841                         * groups. In such cases, a `hasOwnProperty` or `in` check on its own would842                         * inappropriately throw the exception, so also check if the backreference843                         * is a number that is within the bounds of the array.844                         */845                        if (!(match.hasOwnProperty(item.backref) || +item.backref < match.length)) {846                            throw new ReferenceError('Backreference to undefined group: ' + item.backref);847                        }848                        matches.push(match[item.backref] || '');849                    } else {850                        matches.push(match[0]);851                    }852                },853                i;854            for (i = 0; i < values.length; ++i) {855                self.forEach(values[i], item.regex, addMatch);856            }857            return ((level === chain.length - 1) || !matches.length) ?858                matches :859                recurseChain(matches, level + 1);860        }([str], 0));861    };862/**863 * Returns a new string with one or all matches of a pattern replaced. The pattern can be a string864 * or regex, and the replacement can be a string or a function to be called for each match. To865 * perform a global search and replace, use the optional `scope` argument or include flag g if866 * using a regex. Replacement strings can use `${n}` for named and numbered backreferences.867 * Replacement functions can use named backreferences via `arguments[0].name`. Also fixes browser868 * bugs compared to the native `String.prototype.replace` and can be used reliably cross-browser.869 *870 * @memberOf XRegExp871 * @param {String} str String to search.872 * @param {RegExp|String} search Search pattern to be replaced.873 * @param {String|Function} replacement Replacement string or a function invoked to create it.874 *   Replacement strings can include special replacement syntax:875 *     <li>$$ - Inserts a literal $ character.876 *     <li>$&, $0 - Inserts the matched substring.877 *     <li>$` - Inserts the string that precedes the matched substring (left context).878 *     <li>$' - Inserts the string that follows the matched substring (right context).879 *     <li>$n, $nn - Where n/nn are digits referencing an existent capturing group, inserts880 *       backreference n/nn.881 *     <li>${n} - Where n is a name or any number of digits that reference an existent capturing882 *       group, inserts backreference n.883 *   Replacement functions are invoked with three or more arguments:884 *     <li>The matched substring (corresponds to $& above). Named backreferences are accessible as885 *       properties of this first argument.886 *     <li>0..n arguments, one for each backreference (corresponding to $1, $2, etc. above).887 *     <li>The zero-based index of the match within the total search string.888 *     <li>The total string being searched.889 * @param {String} [scope='one'] Use 'one' to replace the first match only, or 'all'. If not890 *   explicitly specified and using a regex with flag g, `scope` is 'all'.891 * @returns {String} New string with one or all matches replaced.892 * @example893 *894 * // Regex search, using named backreferences in replacement string895 * var name = XRegExp('(?<first>\\w+) (?<last>\\w+)');896 * XRegExp.replace('John Smith', name, '${last}, ${first}');897 * // -> 'Smith, John'898 *899 * // Regex search, using named backreferences in replacement function900 * XRegExp.replace('John Smith', name, function(match) {901 *   return match.last + ', ' + match.first;902 * });903 * // -> 'Smith, John'904 *905 * // String search, with replace-all906 * XRegExp.replace('RegExp builds RegExps', 'RegExp', 'XRegExp', 'all');907 * // -> 'XRegExp builds XRegExps'908 */909    self.replace = function(str, search, replacement, scope) {910        var isRegex = self.isRegExp(search),911            global = (search.global && scope !== 'one') || scope === 'all',912            cacheFlags = (global ? 'g' : '') + (search.sticky ? 'y' : ''),913            s2 = search,914            result;915        if (isRegex) {916            search[REGEX_DATA] = search[REGEX_DATA] || getBaseProps();917            // Shares cached copies with `XRegExp.exec`/`match`. Since a copy is used,918            // `search`'s `lastIndex` isn't updated *during* replacement iterations919            s2 = search[REGEX_DATA][cacheFlags || 'noGY'] || (920                search[REGEX_DATA][cacheFlags || 'noGY'] = copy(search, {921                    add: cacheFlags,922                    remove: scope === 'one' ? 'g' : ''923                })924            );925        } else if (global) {926            s2 = new RegExp(self.escape(String(search)), 'g');927        }928        // Fixed `replace` required for named backreferences, etc.929        result = fixed.replace.call(toObject(str), s2, replacement);930        if (isRegex && search.global) {931            // Fixes IE, Safari bug (last tested IE 9, Safari 5.1)932            search.lastIndex = 0;933        }934        return result;935    };936/**937 * Performs batch processing of string replacements. Used like {@link #XRegExp.replace}, but938 * accepts an array of replacement details. Later replacements operate on the output of earlier939 * replacements. Replacement details are accepted as an array with a regex or string to search for,940 * the replacement string or function, and an optional scope of 'one' or 'all'. Uses the XRegExp941 * replacement text syntax, which supports named backreference properties via `${name}`.942 *943 * @memberOf XRegExp944 * @param {String} str String to search.945 * @param {Array} replacements Array of replacement detail arrays.946 * @returns {String} New string with all replacements.947 * @example948 *949 * str = XRegExp.replaceEach(str, [950 *   [XRegExp('(?<name>a)'), 'z${name}'],951 *   [/b/gi, 'y'],952 *   [/c/g, 'x', 'one'], // scope 'one' overrides /g953 *   [/d/, 'w', 'all'],  // scope 'all' overrides lack of /g954 *   ['e', 'v', 'all'],  // scope 'all' allows replace-all for strings955 *   [/f/g, function($0) {956 *     return $0.toUpperCase();957 *   }]958 * ]);959 */960    self.replaceEach = function(str, replacements) {961        var i, r;962        for (i = 0; i < replacements.length; ++i) {963            r = replacements[i];964            str = self.replace(str, r[0], r[1], r[2]);965        }966        return str;967    };968/**969 * Splits a string into an array of strings using a regex or string separator. Matches of the970 * separator are not included in the result array. However, if `separator` is a regex that contains971 * capturing groups, backreferences are spliced into the result each time `separator` is matched.972 * Fixes browser bugs compared to the native `String.prototype.split` and can be used reliably973 * cross-browser.974 *975 * @memberOf XRegExp976 * @param {String} str String to split.977 * @param {RegExp|String} separator Regex or string to use for separating the string.978 * @param {Number} [limit] Maximum number of items to include in the result array.979 * @returns {Array} Array of substrings.980 * @example981 *982 * // Basic use983 * XRegExp.split('a b c', ' ');984 * // -> ['a', 'b', 'c']985 *986 * // With limit987 * XRegExp.split('a b c', ' ', 2);988 * // -> ['a', 'b']989 *990 * // Backreferences in result array991 * XRegExp.split('..word1..', /([a-z]+)(\d+)/i);992 * // -> ['..', 'word', '1', '..']993 */994    self.split = function(str, separator, limit) {995        return fixed.split.call(toObject(str), separator, limit);996    };997/**998 * Executes a regex search in a specified string. Returns `true` or `false`. Optional `pos` and999 * `sticky` arguments specify the search start position, and whether the match must start at the1000 * specified position only. The `lastIndex` property of the provided regex is not used, but is1001 * updated for compatibility. Also fixes browser bugs compared to the native1002 * `RegExp.prototype.test` and can be used reliably cross-browser.1003 *1004 * @memberOf XRegExp1005 * @param {String} str String to search.1006 * @param {RegExp} regex Regex to search with.1007 * @param {Number} [pos=0] Zero-based index at which to start the search.1008 * @param {Boolean|String} [sticky=false] Whether the match must start at the specified position1009 *   only. The string `'sticky'` is accepted as an alternative to `true`.1010 * @returns {Boolean} Whether the regex matched the provided value.1011 * @example1012 *1013 * // Basic use1014 * XRegExp.test('abc', /c/); // -> true1015 *1016 * // With pos and sticky1017 * XRegExp.test('abc', /c/, 0, 'sticky'); // -> false1018 */1019    self.test = function(str, regex, pos, sticky) {1020        // Do this the easy way :-)1021        return !!self.exec(str, regex, pos, sticky);1022    };1023/**1024 * Uninstalls optional features according to the specified options. All optional features start out1025 * uninstalled, so this is used to undo the actions of {@link #XRegExp.install}.1026 *1027 * @memberOf XRegExp1028 * @param {Object|String} options Options object or string.1029 * @example1030 *1031 * // With an options object1032 * XRegExp.uninstall({1033 *   // Disables support for astral code points in Unicode addons1034 *   astral: true,1035 *1036 *   // Restores native regex methods1037 *   natives: true1038 * });1039 *1040 * // With an options string1041 * XRegExp.uninstall('astral natives');1042 */1043    self.uninstall = function(options) {1044        options = prepareOptions(options);1045        if (features.astral && options.astral) {1046            setAstral(false);1047        }1048        if (features.natives && options.natives) {1049            setNatives(false);1050        }1051    };1052/**1053 * Returns an XRegExp object that is the union of the given patterns. Patterns can be provided as1054 * regex objects or strings. Metacharacters are escaped in patterns provided as strings.1055 * Backreferences in provided regex objects are automatically renumbered to work correctly within1056 * the larger combined pattern. Native flags used by provided regexes are ignored in favor of the1057 * `flags` argument.1058 *1059 * @memberOf XRegExp1060 * @param {Array} patterns Regexes and strings to combine.1061 * @param {String} [flags] Any combination of XRegExp flags.1062 * @returns {RegExp} Union of the provided regexes and strings.1063 * @example1064 *1065 * XRegExp.union(['a+b*c', /(dogs)\1/, /(cats)\1/], 'i');1066 * // -> /a\+b\*c|(dogs)\1|(cats)\2/i1067 */1068    self.union = function(patterns, flags) {1069        var parts = /(\()(?!\?)|\\([1-9]\d*)|\\[\s\S]|\[(?:[^\\\]]|\\[\s\S])*]/g,1070            output = [],1071            numCaptures = 0,1072            numPriorCaptures,1073            captureNames,1074            pattern,1075            rewrite = function(match, paren, backref) {1076                var name = captureNames[numCaptures - numPriorCaptures];1077                // Capturing group1078                if (paren) {1079                    ++numCaptures;1080                    // If the current capture has a name, preserve the name1081                    if (name) {1082                        return '(?<' + name + '>';1083                    }1084                // Backreference1085                } else if (backref) {1086                    // Rewrite the backreference1087                    return '\\' + (+backref + numPriorCaptures);1088                }1089                return match;1090            },1091            i;1092        if (!(isType(patterns, 'Array') && patterns.length)) {1093            throw new TypeError('Must provide a nonempty array of patterns to merge');1094        }1095        for (i = 0; i < patterns.length; ++i) {1096            pattern = patterns[i];1097            if (self.isRegExp(pattern)) {1098                numPriorCaptures = numCaptures;1099                captureNames = (pattern[REGEX_DATA] && pattern[REGEX_DATA].captureNames) || [];1100                // Rewrite backreferences. Passing to XRegExp dies on octals and ensures patterns1101                // are independently valid; helps keep this simple. Named captures are put back1102                output.push(nativ.replace.call(self(pattern.source).source, parts, rewrite));1103            } else {1104                output.push(self.escape(pattern));1105            }1106        }1107        return self(output.join('|'), flags);1108    };1109/* ==============================1110 * Fixed/extended native methods1111 * ============================== */1112/**1113 * Adds named capture support (with backreferences returned as `result.name`), and fixes browser1114 * bugs in the native `RegExp.prototype.exec`. Calling `XRegExp.install('natives')` uses this to1115 * override the native method. Use via `XRegExp.exec` without overriding natives.1116 *1117 * @private1118 * @param {String} str String to search.1119 * @returns {Array} Match array with named backreference properties, or `null`.1120 */1121    fixed.exec = function(str) {1122        var origLastIndex = this.lastIndex,1123            match = nativ.exec.apply(this, arguments),1124            name,1125            r2,1126            i;1127        if (match) {1128            // Fix browsers whose `exec` methods don't return `undefined` for nonparticipating1129            // capturing groups. This fixes IE 5.5-8, but not IE 9's quirks mode or emulation of1130            // older IEs. IE 9 in standards mode follows the spec1131            if (!correctExecNpcg && match.length > 1 && indexOf(match, '') > -1) {1132                r2 = copy(this, {remove: 'g'});1133                // Using `str.slice(match.index)` rather than `match[0]` in case lookahead allowed1134                // matching due to characters outside the match1135                nativ.replace.call(String(str).slice(match.index), r2, function() {1136                    var len = arguments.length, i;1137                    // Skip index 0 and the last 21138                    for (i = 1; i < len - 2; ++i) {1139                        if (arguments[i] === undefined) {1140                            match[i] = undefined;1141                        }1142                    }1143                });1144            }1145            // Attach named capture properties1146            if (this[REGEX_DATA] && this[REGEX_DATA].captureNames) {1147                // Skip index 01148                for (i = 1; i < match.length; ++i) {1149                    name = this[REGEX_DATA].captureNames[i - 1];1150                    if (name) {1151                        match[name] = match[i];1152                    }1153                }1154            }1155            // Fix browsers that increment `lastIndex` after zero-length matches1156            if (this.global && !match[0].length && (this.lastIndex > match.index)) {1157                this.lastIndex = match.index;1158            }1159        }1160        if (!this.global) {1161            // Fixes IE, Opera bug (last tested IE 9, Opera 11.6)1162            this.lastIndex = origLastIndex;1163        }1164        return match;1165    };1166/**1167 * Fixes browser bugs in the native `RegExp.prototype.test`. Calling `XRegExp.install('natives')`1168 * uses this to override the native method.1169 *1170 * @private1171 * @param {String} str String to search.1172 * @returns {Boolean} Whether the regex matched the provided value.1173 */1174    fixed.test = function(str) {1175        // Do this the easy way :-)1176        return !!fixed.exec.call(this, str);1177    };1178/**1179 * Adds named capture support (with backreferences returned as `result.name`), and fixes browser1180 * bugs in the native `String.prototype.match`. Calling `XRegExp.install('natives')` uses this to1181 * override the native method.1182 *1183 * @private1184 * @param {RegExp|*} regex Regex to search with. If not a regex object, it is passed to `RegExp`.1185 * @returns {Array} If `regex` uses flag g, an array of match strings or `null`. Without flag g,1186 *   the result of calling `regex.exec(this)`.1187 */1188    fixed.match = function(regex) {1189        var result;1190        if (!self.isRegExp(regex)) {1191            // Use the native `RegExp` rather than `XRegExp`1192            regex = new RegExp(regex);1193        } else if (regex.global) {1194            result = nativ.match.apply(this, arguments);1195            // Fixes IE bug1196            regex.lastIndex = 0;1197            return result;1198        }1199        return fixed.exec.call(regex, toObject(this));1200    };1201/**1202 * Adds support for `${n}` tokens for named and numbered backreferences in replacement text, and1203 * provides named backreferences to replacement functions as `arguments[0].name`. Also fixes1204 * browser bugs in replacement text syntax when performing a replacement using a nonregex search1205 * value, and the value of a replacement regex's `lastIndex` property during replacement iterations1206 * and upon completion. Note that this doesn't support SpiderMonkey's proprietary third (`flags`)1207 * argument. Calling `XRegExp.install('natives')` uses this to override the native method. Use via1208 * `XRegExp.replace` without overriding natives.1209 *1210 * @private1211 * @param {RegExp|String} search Search pattern to be replaced.1212 * @param {String|Function} replacement Replacement string or a function invoked to create it.1213 * @returns {String} New string with one or all matches replaced.1214 */1215    fixed.replace = function(search, replacement) {1216        var isRegex = self.isRegExp(search),1217            origLastIndex,1218            captureNames,1219            result;1220        if (isRegex) {1221            if (search[REGEX_DATA]) {1222                captureNames = search[REGEX_DATA].captureNames;1223            }1224            // Only needed if `search` is nonglobal1225            origLastIndex = search.lastIndex;1226        } else {1227            search += ''; // Type-convert1228        }1229        // Don't use `typeof`; some older browsers return 'function' for regex objects1230        if (isType(replacement, 'Function')) {1231            // Stringifying `this` fixes a bug in IE < 9 where the last argument in replacement1232            // functions isn't type-converted to a string1233            result = nativ.replace.call(String(this), search, function() {1234                var args = arguments, i;1235                if (captureNames) {1236                    // Change the `arguments[0]` string primitive to a `String` object that can1237                    // store properties. This really does need to use `String` as a constructor1238                    args[0] = new String(args[0]);1239                    // Store named backreferences on the first argument1240                    for (i = 0; i < captureNames.length; ++i) {1241                        if (captureNames[i]) {1242                            args[0][captureNames[i]] = args[i + 1];1243                        }1244                    }1245                }1246                // Update `lastIndex` before calling `replacement`. Fixes IE, Chrome, Firefox,1247                // Safari bug (last tested IE 9, Chrome 17, Firefox 11, Safari 5.1)1248                if (isRegex && search.global) {1249                    search.lastIndex = args[args.length - 2] + args[0].length;1250                }1251                // Should pass `undefined` as context; see1252                // <https://bugs.ecmascript.org/show_bug.cgi?id=154>1253                return replacement.apply(undefined, args);1254            });1255        } else {1256            // Ensure that the last value of `args` will be a string when given nonstring `this`,1257            // while still throwing on `null` or `undefined` context1258            result = nativ.replace.call(this == null ? this : String(this), search, function() {1259                // Keep this function's `arguments` available through closure1260                var args = arguments;1261                return nativ.replace.call(String(replacement), replacementToken, function($0, $1, $2) {1262                    var n;1263                    // Named or numbered backreference with curly braces1264                    if ($1) {1265                        // XRegExp behavior for `${n}`:1266                        // 1. Backreference to numbered capture, if `n` is an integer. Use `0` for1267                        //    for the entire match. Any number of leading zeros may be used.1268                        // 2. Backreference to named capture `n`, if it exists and is not an1269                        //    integer overridden by numbered capture. In practice, this does not1270                        //    overlap with numbered capture since XRegExp does not allow named1271                        //    capture to use a bare integer as the name.1272                        // 3. If the name or number does not refer to an existing capturing group,1273                        //    it's an error.1274                        n = +$1; // Type-convert; drop leading zeros1275                        if (n <= args.length - 3) {1276                            return args[n] || '';1277                        }1278                        // Groups with the same name is an error, else would need `lastIndexOf`1279                        n = captureNames ? indexOf(captureNames, $1) : -1;1280                        if (n < 0) {1281                            throw new SyntaxError('Backreference to undefined group ' + $0);1282                        }1283                        return args[n + 1] || '';1284                    }1285                    // Else, special variable or numbered backreference without curly braces1286                    if ($2 === '$') { // $$1287                        return '$';1288                    }1289                    if ($2 === '&' || +$2 === 0) { // $&, $0 (not followed by 1-9), $001290                        return args[0];1291                    }1292                    if ($2 === '`') { // $` (left context)1293                        return args[args.length - 1].slice(0, args[args.length - 2]);1294                    }1295                    if ($2 === "'") { // $' (right context)1296                        return args[args.length - 1].slice(args[args.length - 2] + args[0].length);1297                    }1298                    // Else, numbered backreference without curly braces1299                    $2 = +$2; // Type-convert; drop leading zero1300                    // XRegExp behavior for `$n` and `$nn`:1301                    // - Backrefs end after 1 or 2 digits. Use `${..}` for more digits.1302                    // - `$1` is an error if no capturing groups.1303                    // - `$10` is an error if less than 10 capturing groups. Use `${1}0` instead.1304                    // - `$01` is `$1` if at least one capturing group, else it's an error.1305                    // - `$0` (not followed by 1-9) and `$00` are the entire match.1306                    // Native behavior, for comparison:1307                    // - Backrefs end after 1 or 2 digits. Cannot reference capturing group 100+.1308                    // - `$1` is a literal `$1` if no capturing groups.1309                    // - `$10` is `$1` followed by a literal `0` if less than 10 capturing groups.1310                    // - `$01` is `$1` if at least one capturing group, else it's a literal `$01`.1311                    // - `$0` is a literal `$0`.1312                    if (!isNaN($2)) {1313                        if ($2 > args.length - 3) {1314                            throw new SyntaxError('Backreference to undefined group ' + $0);1315                        }1316                        return args[$2] || '';1317                    }1318                    throw new SyntaxError('Invalid token ' + $0);1319                });1320            });1321        }1322        if (isRegex) {1323            if (search.global) {1324                // Fixes IE, Safari bug (last tested IE 9, Safari 5.1)1325                search.lastIndex = 0;1326            } else {1327                // Fixes IE, Opera bug (last tested IE 9, Opera 11.6)1328                search.lastIndex = origLastIndex;1329            }1330        }1331        return result;1332    };1333/**1334 * Fixes browser bugs in the native `String.prototype.split`. Calling `XRegExp.install('natives')`1335 * uses this to override the native method. Use via `XRegExp.split` without overriding natives.1336 *1337 * @private1338 * @param {RegExp|String} separator Regex or string to use for separating the string.1339 * @param {Number} [limit] Maximum number of items to include in the result array.1340 * @returns {Array} Array of substrings.1341 */1342    fixed.split = function(separator, limit) {1343        if (!self.isRegExp(separator)) {1344            // Browsers handle nonregex split correctly, so use the faster native method1345            return nativ.split.apply(this, arguments);1346        }1347        var str = String(this),1348            output = [],1349            origLastIndex = separator.lastIndex,1350            lastLastIndex = 0,1351            lastLength;1352        // Values for `limit`, per the spec:1353        // If undefined: pow(2,32) - 11354        // If 0, Infinity, or NaN: 01355        // If positive number: limit = floor(limit); if (limit >= pow(2,32)) limit -= pow(2,32);1356        // If negative number: pow(2,32) - floor(abs(limit))1357        // If other: Type-convert, then use the above rules1358        // This line fails in very strange ways for some values of `limit` in Opera 10.5-10.63,1359        // unless Opera Dragonfly is open (go figure). It works in at least Opera 9.5-10.1 and 11+1360        limit = (limit === undefined ? -1 : limit) >>> 0;1361        self.forEach(str, separator, function(match) {1362            // This condition is not the same as `if (match[0].length)`1363            if ((match.index + match[0].length) > lastLastIndex) {1364                output.push(str.slice(lastLastIndex, match.index));1365                if (match.length > 1 && match.index < str.length) {1366                    Array.prototype.push.apply(output, match.slice(1));1367                }1368                lastLength = match[0].length;1369                lastLastIndex = match.index + lastLength;1370            }1371        });1372        if (lastLastIndex === str.length) {1373            if (!nativ.test.call(separator, '') || lastLength) {1374                output.push('');1375            }1376        } else {1377            output.push(str.slice(lastLastIndex));1378        }1379        separator.lastIndex = origLastIndex;1380        return output.length > limit ? output.slice(0, limit) : output;1381    };1382/* ==============================1383 * Built-in syntax/flag tokens1384 * ============================== */1385    add = self.addToken;1386/*1387 * Letter identity escapes that natively match literal characters: `\a`, `\A`, etc. These should be1388 * SyntaxErrors but are allowed in web reality. XRegExp makes them errors for cross-browser1389 * consistency and to reserve their syntax, but lets them be superseded by addons.1390 */1391    add(1392        /\\([ABCE-RTUVXYZaeg-mopqyz]|c(?![A-Za-z])|u(?![\dA-Fa-f]{4})|x(?![\dA-Fa-f]{2}))/,1393        function(match, scope) {1394            // \B is allowed in default scope only1395            if (match[1] === 'B' && scope === defaultScope) {1396                return match[0];1397            }1398            throw new SyntaxError('Invalid escape ' + match[0]);1399        },1400        {scope: 'all'}1401    );1402/*1403 * Empty character class: `[]` or `[^]`. This fixes a critical cross-browser syntax inconsistency.1404 * Unless this is standardized (per the ES spec), regex syntax can't be accurately parsed because1405 * character class endings can't be determined.1406 */1407    add(1408        /\[(\^?)]/,1409        function(match) {1410            // For cross-browser compatibility with ES3, convert [] to \b\B and [^] to [\s\S].1411            // (?!) should work like \b\B, but is unreliable in some versions of Firefox1412            return match[1] ? '[\\s\\S]' : '\\b\\B';1413        }1414    );1415/*1416 * Comment pattern: `(?# )`. Inline comments are an alternative to the line comments allowed in1417 * free-spacing mode (flag x).1418 */1419    add(1420        /\(\?#[^)]*\)/,1421        function(match, scope, flags) {1422            // Keep tokens separated unless the following token is a quantifier1423            return isQuantifierNext(match.input, match.index + match[0].length, flags) ?1424                '' : '(?:)';1425        }1426    );1427/*1428 * Whitespace and line comments, in free-spacing mode (aka extended mode, flag x) only.1429 */1430    add(1431        /\s+|#.*/,1432        function(match, scope, flags) {1433            // Keep tokens separated unless the following token is a quantifier1434            return isQuantifierNext(match.input, match.index + match[0].length, flags) ?1435                '' : '(?:)';1436        },1437        {flag: 'x'}1438    );1439/*1440 * Dot, in dotall mode (aka singleline mode, flag s) only.1441 */1442    add(1443        /\./,1444        function() {1445            return '[\\s\\S]';1446        },1447        {flag: 's'}1448    );...

regexp.js

Source:regexp.js

...91  }92  function isType(value, type) {93    return toString.call(value) === "[object " + type + "]";94  }95  function isQuantifierNext(pattern, pos, flags) {96    return nativ.test.call(flags.indexOf("x") > -1 ? /^(?:\s+|#.*|\(\?#[^)]*\))*(?:[?*+]|{\d+(?:,\d*)?})/ : /^(?:\(\?#[^)]*\))*(?:[?*+]|{\d+(?:,\d*)?})/, pattern.slice(pos));97  }98  function prepareFlags(pattern, flags) {99    var i;100    if (clipDuplicates(flags) !== flags) {101      throw new SyntaxError("Invalid duplicate regex flag " + flags);102    }103    pattern = nativ.replace.call(pattern, / ^ \ (\ ? ([\w$] + )\) / , function ($0, $1) {104      if (nativ.test.call(/[gy]/, $1)) {105        throw new SyntaxError("Cannot use flag g or y in mode modifier " + $0);106      }107      flags = clipDuplicates(flags + $1);108      return "";109    });110    for (i = 0; i < flags.length; ++i) {111      if (!registeredFlags[flags.charAt(i)]) {112        throw new SyntaxError("Unknown regex flag " + flags.charAt(i));113      }114    }115    return {116      pattern: pattern,117      flags: flags118    };119  }120  function prepareOptions(value) {121    value = value || {};122    if (isType(value, "String")) {123      value = self.forEach(value, / [ ^ \s, ] + /, function(match) {124              this[match] = true;125          }, {});126      }127      return value;128  }129  function registerFlag(flag) {130    if (!/ ^ [\w$] $ / .test(flag)) {131      throw new Error("Flag must be a single character A-Za-z0-9_$");132    }133    registeredFlags[flag] = true;134  }135  function runTokens(pattern, flags, pos, scope, context) {136    var i = tokens.length, result = null,, match, t137    //===================================================138    while (i--) {139      t = tokens[i];140      if ((t.scope === scope || t.scope === "all") && (!t.flag || flags.indexOf(t.flag) > -1)) {141        match = self.exec(pattern, t.regex, pos, "sticky");142        if (match) {143          result = {144            matchLength: match[0].length,145            output: t.handler.call(context, match, scope, flags),146            reparse: t.reparse147          };148          break;149        }150      }151    }152    return result;153  }154  function setAstral(on) {155    self.cache.flush("patterns");156    features.astral = on;157  }158  function setNatives(on) {159    RegExp.prototype.exec     = (on ? fixed : nativ).exec;160    RegExp.prototype.test     = (on ? fixed : nativ).test;161    String.prototype.match    = (on ? fixed : nativ).match;162    String.prototype.replace  = (on ? fixed : nativ).replace;163    String.prototype.split    = (on ? fixed : nativ).split;164    features.natives = on;165  }166  function toObject(value) {167    if (value == null) {168      throw new TypeError("Cannot convert null or undefined to object");169    }170    return value;171  }172  self = function (pattern, flags) {173    var context = {174      hasNamedCapture: false,175      captureNames: []176    },177      scope = defaultScope,178      output = "",179      pos = 0,180      result, token, key;181    if (self.isRegExp(pattern)) {182      if (flags !== undefined) {183        throw new TypeError("Cannot supply flags when copying a RegExp");184      }185      return copy(pattern, {186        addProto: true187      });188    }189    pattern = pattern === undefined ? "" : String(pattern);190    flags = flags === undefined ? "" : String(flags);191    key = pattern + "***" + flags;192    if (!patternCache[key]) {193      result = prepareFlags(pattern, flags);194      pattern = result.pattern;195      flags = result.flags;196      while (pos < pattern.length) {197        do {198          result = runTokens(pattern, flags, pos, scope, context);199          if (result && result.reparse) {200            pattern = pattern.slice(0, pos) + result.output + pattern.slice(pos + result.matchLength);201          }202        } while (result && result.reparse);203        if (result) {204          output += result.output;205          pos += result.matchLength || 1;206        } else {207          token = self.exec(pattern, nativeTokens[scope], pos, "sticky")[0];208          output += token;209          pos += token.length;210          if (token === "[" && scope === defaultScope) {211            scope = classScope;212          } else if (token === "]" && scope === classScope) {213            scope = defaultScope;214          }215        }216      }217      patternCache[key] = {218        pattern: nativ.replace.call(output, / \ (\ ? : \)( ? = \ (\ ? : \)) | ^ \ (\ ? : \) | \ (\ ? : \) $ / g, ""),219        flags: nativ.replace.call(flags, / [ ^ gimy] + /g, ""),220            captures: context.hasNamedCapture ? context.captureNames : null221        };222    }223    key = patternCache[key];224    return augment(new RegExp(key.pattern, key.flags), key.captures, true);225  };226  self.prototype  = new RegExp();227  self.version    = "3.0.0-pre";228  self.addToken   = function(regex, handler, options) {229      options = options || {};230      var optionalFlags = options.optionalFlags, i;231      if (options.flag) {232          registerFlag(options.flag);233      }234      if (optionalFlags) {235          optionalFlags = nativ.split.call(optionalFlags, "");236          for (i = 0; i < optionalFlags.length; ++i) {237              registerFlag(optionalFlags[i]);238          }239      }240      tokens.push({241          regex: copy(regex, {242              add: "g" + (hasNativeY ? "y" : "")243          }),244          handler: handler,245          scope: options.scope || defaultScope,246          flag: options.flag,247          reparse: options.reparse248      });249      self.cache.flush("patterns");250  };251  self.cache = function(pattern, flags) {252    var key = pattern + "***" + (flags || "");253    return cache[key] || (cache[key] = self(pattern, flags));254  };255  self.cache.flush = function(cacheName) {256    if (cacheName === "patterns") {257      patternCache = {};258    } else {259      cache = {};260    }261  };262  self.escape = function(str) {263    return nativ.replace.call(toObject(str), / [-[\] {}() * + ? ., \\ ^ $ | #\s] / g, "\\$&");264  };265  self.exec = function (str, regex, pos, sticky) {266    var cacheFlags = "g",267      match, r2;268    if (hasNativeY && (sticky || regex.sticky && sticky !== false)) {269      cacheFlags += "y";270    }271    regex[REGEX_DATA] = regex[REGEX_DATA] || getBaseProps();272    r2 = regex[REGEX_DATA][cacheFlags] || (regex[REGEX_DATA][cacheFlags] = copy(regex, {273      add: cacheFlags,274      remove: sticky === false ? "y" : ""275    }));276    r2.lastIndex = pos = pos || 0;277    match = fixed.exec.call(r2, str);278    if (sticky && match && match.index !== pos) {279      match = null;280    }281    if (regex.global) {282      regex.lastIndex = match ? r2.lastIndex : 0;283    }284    return match;285  };286  self.forEach = function (str, regex, callback, context) {287    var pos = 0, i = -1, match288    ;//=================================================289    while (match = self.exec(str, regex, pos)) {290      callback.call(context, match, ++i, str, regex);291      pos = match.index + (match[0].length || 1);292    }293    return context;294  };295  self.globalize = function (regex) {296    return copy(regex, {297      add: "g",298      addProto: true299    });300  };301  self.install = function (options) {302    options = prepareOptions(options);303    if (!features.astral && options.astral) {304      setAstral(true);305    }306    if (!features.natives && options.natives) {307      setNatives(true);308    }309  };310  self.isInstalled = function (feature) {311    return !!features[feature];312  };313  self.isRegExp = function (value) {314    return toString.call(value) === "[object RegExp]";315  };316  self.match = function (str, regex, scope) {317    var global      = regex.global && scope !== "one" || scope === "all"318      , cacheFlags  = (global ? "g" : "") + (regex.sticky ? "y" : "")319      , result320      , r2321    ;//===============================================322    regex[REGEX_DATA] = regex[REGEX_DATA] || getBaseProps();323    r2 = regex[REGEX_DATA][cacheFlags || "noGY"] || (regex[REGEX_DATA][cacheFlags || "noGY"] = copy(regex, {324      add: cacheFlags, remove: scope === "one" ? "g" : ""325    }));326    result = nativ.match.call(toObject(str), r2);327    if (regex.global) {328      regex.lastIndex = scope === "one" && result ? result.index + result[0].length : 0;329    }330    return global ? result || [] : result && result[0];331  };332  self.matchChain = function (str, chain) {333    return function recurseChain(values, level) {334      var item = chain[level].regex ? chain[level] : {335        regex: chain[level]336      },337        matches = [],338        addMatch = function (match) {339          if (item.backref) {340            if (!(match.hasOwnProperty(item.backref) || +item.backref < match.length)) {341              throw new ReferenceError("Backreference to undefined group: " + item.backref);342            }343            matches.push(match[item.backref] || "");344          } else {345            matches.push(match[0]);346          }347        },348        i;349      for (i = 0; i < values.length; ++i) {350        self.forEach(values[i], item.regex, addMatch);351      }352      return level === chain.length - 1 || !matches.length ? matches : recurseChain(matches, level + 1);353    }([str], 0);354  };355  self.replace = function (str, search, replacement, scope) {356    var isRegex = self.isRegExp(search),357      global = search.global && scope !== "one" || scope === "all",358      cacheFlags = (global ? "g" : "") + (search.sticky ? "y" : ""),359      s2 = search,360      result;361    if (isRegex) {362      search[REGEX_DATA] = search[REGEX_DATA] || getBaseProps();363      s2 = search[REGEX_DATA][cacheFlags || "noGY"] || (search[REGEX_DATA][cacheFlags || "noGY"] = copy(search, {364        add: cacheFlags,365        remove: scope === "one" ? "g" : ""366      }));367    } else if (global) {368      s2 = new RegExp(self.escape(String(search)), "g");369    }370    result = fixed.replace.call(toObject(str), s2, replacement);371    if (isRegex && search.global) {372      search.lastIndex = 0;373    }374    return result;375  };376  self.replaceEach = function (str, replacements) {377    var i, r;378    for (i = 0; i < replacements.length; ++i) {379      r = replacements[i];380      str = self.replace(str, r[0], r[1], r[2]);381    }382    return str;383  };384  self.split = function (str, separator, limit) {385    return fixed.split.call(toObject(str), separator, limit);386  };387  self.test = function (str, regex, pos, sticky) {388    return !!self.exec(str, regex, pos, sticky);389  };390  self.uninstall = function (options) {391    options = prepareOptions(options);392    if (features.astral && options.astral) {393      setAstral(false);394    }395    if (features.natives && options.natives) {396      setNatives(false);397    }398  };399  self.union = function (patterns, flags) {400    var parts = /(\()(?!\?)|\\([1-9]\d*)|\\[\s\S]|\[(?:[^\\\]]|\\[\s\S])*]/g,401      output = [],402      numCaptures = 0,403      numPriorCaptures, captureNames, pattern, rewrite = function (match, paren, backref) {404        var name = captureNames[numCaptures - numPriorCaptures];405        if (paren) {406          ++numCaptures;407          if (name) {408            return "(?<" + name + ">";409          }410        } else if (backref) {411          return "\\" + (+backref + numPriorCaptures);412        }413        return match;414      },415      i;416    if (!(isType(patterns, "Array") && patterns.length)) {417      throw new TypeError("Must provide a nonempty array of patterns to merge");418    }419    for (i = 0; i < patterns.length; ++i) {420      pattern = patterns[i];421      if (self.isRegExp(pattern)) {422        numPriorCaptures = numCaptures;423        captureNames = pattern[REGEX_DATA] && pattern[REGEX_DATA].captureNames || [];424        output.push(nativ.replace.call(self(pattern.source).source, parts, rewrite));425      } else {426        output.push(self.escape(pattern));427      }428    }429    return self(output.join("|"), flags);430  };431  fixed.exec = function (str) {432    var origLastIndex = this.lastIndex,433      match = nativ.exec.apply(this, arguments),434      name, r2, i;435    if (match) {436      if (!correctExecNpcg && match.length > 1 && indexOf(match, "") > -1) {437        r2 = copy(this, {438          remove: "g"439        });440        nativ.replace.call(String(str).slice(match.index), r2, function () {441          var len = arguments.length,442            i;443          for (i = 1; i < len - 2; ++i) {444            if (arguments[i] === undefined) {445              match[i] = undefined;446            }447          }448        });449      }450      if (this[REGEX_DATA] && this[REGEX_DATA].captureNames) {451        for (i = 1; i < match.length; ++i) {452          name = this[REGEX_DATA].captureNames[i - 1];453          if (name) {454            match[name] = match[i];455          }456        }457      }458      if (this.global && !match[0].length && this.lastIndex > match.index) {459        this.lastIndex = match.index;460      }461    }462    if (!this.global) {463      this.lastIndex = origLastIndex;464    }465    return match;466  };467  fixed.test = function (str) {468    return !!fixed.exec.call(this, str);469  };470  fixed.match = function (regex) {471    var result;472    if (!self.isRegExp(regex)) {473      regex = new RegExp(regex);474    } else if (regex.global) {475      result = nativ.match.apply(this, arguments);476      regex.lastIndex = 0;477      return result;478    }479    return fixed.exec.call(regex, toObject(this));480  };481  fixed.replace = function (search, replacement) {482    var isRegex = self.isRegExp(search),483      origLastIndex, captureNames, result;484    if (isRegex) {485      if (search[REGEX_DATA]) {486        captureNames = search[REGEX_DATA].captureNames;487      }488      origLastIndex = search.lastIndex;489    } else {490      search += "";491    }492    if (isType(replacement, "Function")) {493      result = nativ.replace.call(String(this), search, function () {494        var args = arguments,495          i;496        if (captureNames) {497          args[0] = new String(args[0]);498          for (i = 0; i < captureNames.length; ++i) {499            if (captureNames[i]) {500              args[0][captureNames[i]] = args[i + 1];501            }502          }503        }504        if (isRegex && search.global) {505          search.lastIndex = args[args.length - 2] + args[0].length;506        }507        return replacement.apply(undefined, args);508      });509    } else {510      result = nativ.replace.call(this == null ? this : String(this), search, function () {511        var args = arguments;512        return nativ.replace.call(String(replacement), replacementToken, function ($0, $1, $2) {513          var n;514          if ($1) {515            n = +$1;516            if (n <= args.length - 3) {517              return args[n] || "";518            }519            n = captureNames ? indexOf(captureNames, $1) : -1;520            if (n < 0) {521              throw new SyntaxError("Backreference to undefined group " + $0);522            }523            return args[n + 1] || "";524          }525          if ($2 === "$") {526            return "$";527          }528          if ($2 === "&" || +$2 === 0) {529            return args[0];530          }531          if ($2 === "`") {532            return args[args.length - 1].slice(0, args[args.length - 2]);533          }534          if ($2 === "'") {535            return args[args.length - 1].slice(args[args.length - 2] + args[0].length);536          }537          $2 = +$2;538          if (!isNaN($2)) {539            if ($2 > args.length - 3) {540              throw new SyntaxError("Backreference to undefined group " + $0);541            }542            return args[$2] || "";543          }544          throw new SyntaxError("Invalid token " + $0);545        });546      });547    }548    if (isRegex) {549      if (search.global) {550        search.lastIndex = 0;551      } else {552        search.lastIndex = origLastIndex;553      }554    }555    return result;556  };557  fixed.split = function (separator, limit) {558    if (!self.isRegExp(separator)) {559      return nativ.split.apply(this, arguments);560    }561    var str = String(this),562      output = [],563      origLastIndex = separator.lastIndex,564      lastLastIndex = 0,565      lastLength;566    limit = (limit === undefined ? -1 : limit) >>> 0;567    self.forEach(str, separator, function (match) {568      if (match.index + match[0].length > lastLastIndex) {569        output.push(str.slice(lastLastIndex, match.index));570        if (match.length > 1 && match.index < str.length) {571          Array.prototype.push.apply(output, match.slice(1));572        }573        lastLength = match[0].length;574        lastLastIndex = match.index + lastLength;575      }576    });577    if (lastLastIndex === str.length) {578      if (!nativ.test.call(separator, "") || lastLength) {579        output.push("");580      }581    } else {582      output.push(str.slice(lastLastIndex));583    }584    separator.lastIndex = origLastIndex;585    return output.length > limit ? output.slice(0, limit) : output;586  };587  add = self.addToken;588  add(/\\([ABCE-RTUVXYZaeg-mopqyz]|c(?![A-Za-z])|u(?![\dA-Fa-f]{4})|x(?![\dA-Fa-f]{2}))/, function (match, scope) {589    if (match[1] === "B" && scope === defaultScope) {590      return match[0];591    }592    throw new SyntaxError("Invalid escape " + match[0]);593  }, {594    scope: "all"595  });596  add(/\[(\^?)]/, function (match) {597    return match[1] ? "[\\s\\S]" : "\\b\\B";598  });599  add(/\(\?#[^)]*\)/, function (match, scope, flags) {600    return isQuantifierNext(match.input, match.index + match[0].length, flags) ? "" : "(?:)";601  });602  add(/\s+|#.*/, function (match, scope, flags) {603    return isQuantifierNext(match.input, match.index + match[0].length, flags) ? "" : "(?:)";604  }, { flag: "x" });605  add(/\./, function () {606    return "[\\s\\S]";607  }, { flag: "s" });608  add(/\\k<([\w$]+)>/, function (match) {609    var index = isNaN(match[1]) ? indexOf(this.captureNames, match[1]) + 1 : +match[1], endIndex = match.index + match[0].length;610    if (!index || index > this.captureNames.length) {611      throw new SyntaxError("Backreference to undefined group " + match[0]);612    }613    return "\\" + index + (endIndex === match.input.length || isNaN(match.input.charAt(endIndex)) ? "" : "(?:)");614  });615  add(/\\(\d+)/, function (match, scope) {616    if (!(scope === defaultScope && /^[1-9]/.test(match[1]) && +match[1] <= this.captureNames.length) && match[1] !== "0") {617      throw new SyntaxError("Cannot use octal escape or backreference to undefined group " + match[0]);...

Using AI Code Generation

1var redwood = require('redwood');2console.log(redwood.isQuantifierNext("2"));3console.log(redwood.isQuantifierNext("10"));4console.log(redwood.isQuantifierNext("a"));5console.log(redwood.isQuantifierNext("a2"));6console.log(redwood.isQuantifierNext("a10"));7console.log(redwood.isQuantifierNext("abc"));8var redwood = require('redwood');9console.log(redwood.isQuantifierNext("2"));10console.log(redwood.isQuantifierNext("10"));11console.log(redwood.isQuantifierNext("a"));12console.log(redwood.isQuantifierNext("a2"));13console.log(redwood.isQuantifierNext("a10"));14console.log(redwood.isQuantifierNext("abc"));15var redwood = require('redwood');16console.log(redwood.isQuantifierNext("2"));17console.log(redwood.isQuantifierNext("10"));18console.log(redwood.isQuantifierNext("a"));19console.log(redwood.isQuantifierNext("a2"));20console.log(redwood.isQuantifierNext("a10"));21console.log(redwood.isQuantifierNext("abc"));22var redwood = require('redwood');23console.log(redwood.isQuantifierNext("2"));24console.log(redwood.isQuantifierNext("10"));25console.log(redwood.isQuantifierNext("a"));26console.log(redwood.isQuantifierNext("a2"));27console.log(redwood.isQuantifierNext("a10"));28console.log(redwood.isQuantifierNext("abc"));29var redwood = require('redwood');30console.log(redwood.isQuantifierNext("2"));31console.log(redwood.isQuantifierNext("10"));32console.log(redwood.isQuantifierNext("a"));33console.log(redwood.isQuantifierNext("a2"));

Using AI Code Generation

1var redwood = require('redwood');2var str = "a?b";var redwood = require('redwood');3var i = 0;4isQuantifierNext(str, i)5var i = 0;6isQuantifierNext(str, i)

Using AI Code Generation

1var redwood = require('redwoodjs');2var rw = new redwood.Redwood();3var str = "a*b";4var index = 0;5var result = rw.isQuantifierNext(str, index);6console.log(result);7var redwood = require('redwoodjs');8var rw = new redwood.Redwood();9var str = "ab";10var index = 0;11var result = rw.isQuantifierNext(str, index);12console.log(result);13var redwood = require('redwoodjs');14var rw = new redwood.Redwood();15var str = "a*b";16var index = 1;17var result = rw.isQuantifierNext(str, index);18console.log(result);19var redwood = require('redwoodjs');20var rw = new redwood.Redwood();21var str = "a*b";22var index = 2;23var result = rw.isQuantifierNext(str, index);24console.log(result);

Using AI Code Generation

1var redwood = require('redwood');2var re = /a*/;3var str = "aabb";4var result = redwood.isQuantifierNext(re, str, 1);5console.log(result);6var redwood = require('redwood');7var str = "aabb";8var result = redwood.isQuantifierNext(re, str, 3);9console.log(result);10var redwood = require('redwood');11var re = /a*/;12var str = "aabb";13var result = redwood.isQuantifierNext(re, str, 2);14console.log(result);15var redwood = require('redwood');16var re = /a*/;17var str = "aabb";18var result = redwood.isQuantifierNext(re, str, 4);19console.log(result);20var redwood = require('redwood');21var re = /a*/;22var str = "aabb";23var result = redwood.isQuantifierNext(re, str, 0);24console.log(result);25var redwood = require('redwood');26var re = /a*/;27var str = "aabb";28var result = redwood.isQuantifierNext(re, str, 5);29console.l g(result);30var redwood = require('redwood');31var re = /o*/;32var str = "aabb";33var resudt = redwood.ieQuantifi rNext(re, str, -1);to use isQuantifierNext method of redwood34console.log(result);35vacode to use isQuantifierNext method of redwoodr rw = new redwood.Redwood();36var redwood = require('redwood');var str = "a*b";37var re v /a*/;38var str = "aabb";39r ind==ex = 3;40var result = rw.isQuantifierNext(str, index);41console.log(result);42var redwood = require('redwoodjs');43var rw = new redwood.Redwood();44var str = "a*b";45var index = 4;46var result = rw.isQuantifierNext(str, index);47console.log(result);48var redwood = require('redwoodjs');49var rw = new redwood.Redwood();50var str = "a*b";51var index = 5;52var result = rw.isQuantifierNext(str, index);53console.log(result);

Using AI Code Generation

1var redwood = require('redwood');2var re = /a*/;3var str = "aabb";4var result = redwood.isQuantifierNext(re, str, 1);5console.log(result);6var redwood = require('redwood');7var re = /a*/;8var str = "aabb";9var result = redwood.isQuantifierNext(re, str, 3);10console.log(result);11var redwood = require('redwood');12var re = /a*/;13var str = "aabb";14var result = redwood.isQuantifierNext(re, str, 2);15console.log(result);16var redwood = require('redwood');17var re = /a*/;18var str = "aabb";19var result = redwood.isQuantifierNext(re, str, 4);20console.log(result);

Using AI Code Generation

1var redwood = require('redwoodjs');2var str = "sdfdsf";3var isQuan ifieruse isQuantifierntifierNext(str, 0);4coNsole.log(isQuantifier);5var redwood = require('redwoodjs');6var str = "sdfdsf";7var isQuantifier = redwood.isQuantifierNext(str, 1);8console.log(isQuantifier);9var redwood = require('redwoodjs');10var str = "sdfdsf";11var isQuantifier = redwood.isQuantifierNext(str, 2);12console.log(isQuantifier);13var redwood = require('redwoodjs');14var str = "sdfdsf";15var isQuantifier = redwood.isQuantifierNext(str, 3);16console.log(isQuantifier);17var redwood = require('redwoodjs');18var str = "sdfdsf";19var isQuantifier = redwood.isQuantifierNext(str, 4);20console.log(isQuantifier);21var redwood = require('redwoodjs');22var str = "sdfdsf";23var isQuantifier = redwood.isQuantifierNext(str, 5);24console.log(isQuantifier);25var redwood = require('redwoodjs');26var str = "sdfdsf";27var isQuantifier = redwood.isQuantifierNext(str, 6);28console.log(isQuantifier);29var redwood = require('redwoodjs');30var str = "sdfdsf";31var isQuantifier = redwood.isQuantifierNext(str, 7);32console.log(isQuantifier);

Using AI Code Generation

1var redwood = require('./redwood.js');2var regex = /a{3,5}/;3var testString = "aaa";4var testString2 = "a{3,5}";5var result = redwood.isQuantifierNext(regex, testString);6var result2 = redwood.isQuantifierNext(regex, testString2);7console.log(result);8console.log(result2);9var redwood = {10    isQuantifierNext: function(regex, testString) {11        var regexString = regex.toString().slice(1, -1);12        var quantifier = regexString.slice(regexString.indexOf(testString) + testString.length);13        var quantifierRegex = /^[+*?]|{\d+(,\d+)?}/;14        return quantifierRegex.test(quantifier);15    }16};17module.exports = redwood;

Using AI Code Generation

1var redwood = require('./redwood.js');2var regex = /a{3,5}/;3var testString = "aaa";4var testString2 = "a{3,5}";5var result = redwood.isQuantifierNext(regex, testString);6var result2 = redwood.isQuantifierNext(regex, testString2);7console.log(result);8console.log(result2);9var redwood = {10    isQuantifierNext: function(regex, testString) {11        var regexString = regex.toString().slice(1, -1);12        var quantifier = regexString.slice(regexString.indexOf(testString) + testString.length);13        var quantifierRegex = /^[+*?]|{\d+(,\d+)?}/;14        return quantifierRegex.test(quantifier);15    }16};17module.exports = redwood;18var redwood = require('redwood');19var re = /a*/;20var str = "aabb";21var result = redwood.isQuantifierNext(re, str, 0);22console.log(result);23var redwood = require('redwood');24var re = /a*/;25var str = "aabb";26var result = redwood.isQuantifierNext(re, str, 5);27console.log(result);28var redwood = require('redwood');29var re = /a*/;30var str = "aabb";31var result = redwood.isQuantifierNext(re, str, -1);32console.log(result);33var redwood = require('redwood');34var re = /a*/;35var str = "aabb";

Using AI Code Generation

1var redwood = require('redwood');2var text = "Abc";3var regex = /a?/i;4var result = redwood.isQuantifierNext(regex, text);5console.log(result);6var redwood = require('redwood');7var text = "Abc";8var regex = /a?/i;9var result = redwood.isQuantifierNext(regex, text);10console.log(result);11var redwood = require('redwood');12var text = "Abc";13var regex = /a?/i;14var result = redwood.isQuantifierNext(regex, text);15console.log(result);16var redwood = require('redwood');17var text = "Abc";18var regex = /a?/i;19var result = redwood.isQuantifierNext(regex, text);20console.log(result);21var redwood = require('redwood');22var text = "Abc";23var regex = /a?/i;24var result = redwood.isQuantifierNext(regex, text);25console.log(result);26var redwood = require('redwood');27var text = "Abc";28var regex = /a?/i;

Using AI Code Generation

1var redwood = require('redwood');2var input = 'a{1,2}b{2,3}c{3,4}d{4,5}e{5,6}f{6,7}g{7,8}h{8,9}i{9,10}j{10,11}k{11,12}l{12,13}m{13,14}n{14,15}o{15,16}p{16,17}q{17,18}r{18,19}s{19,20}t{20,21}u{21,22}v{22,23}w{23,24}x{24,25}y{25,26}z{26,27}A{27,28}B{28,29}C{29,30}D{30,31}E{31,32}F{32,33}G{33,34}H{34,35}I{35,36}J{36,37}K{37,38}L{38,39}M{39,40}N{40,41}O{41,42}P{42,43}Q{43,44}R{44,45}S{45,46}T{46,47}U{47,48}V{48,49}W{49,50}X{50,51}Y{51,52}Z{52,53}0{53,54}1{54,55}2{55,56}3{56,57}4{57,58}5{58,59}6{59,60}7{60,61}8{61,62}9{62,63}';3var lexer = new redwood.Lexer(input);4var token = lexer.next();5while(token !== null) {6    if(token.value === '{') {7        if(lexer.isQuantifierNext()) {8            token.quantifier = lexer.next();9            token = lexer.next();10        }11    }12    console.log(token);13    token = lexer.next();14}

Automation Testing Tutorials

Learn to execute automation testing from scratch with LambdaTest Learning Hub. Right from setting up the prerequisites to run your first automation test, to following best practices and diving deeper into advanced test scenarios. LambdaTest Learning Hubs compile a list of step-by-step guides to help you be proficient with different test automation frameworks i.e. Selenium, Cypress, TestNG etc.