[6a3a178] | 1 | var DESCRIPTORS = require('../internals/descriptors');
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| 2 | var global = require('../internals/global');
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| 3 | var isForced = require('../internals/is-forced');
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| 4 | var inheritIfRequired = require('../internals/inherit-if-required');
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| 5 | var createNonEnumerableProperty = require('../internals/create-non-enumerable-property');
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| 6 | var defineProperty = require('../internals/object-define-property').f;
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| 7 | var getOwnPropertyNames = require('../internals/object-get-own-property-names').f;
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| 8 | var isRegExp = require('../internals/is-regexp');
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| 9 | var toString = require('../internals/to-string');
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| 10 | var getFlags = require('../internals/regexp-flags');
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| 11 | var stickyHelpers = require('../internals/regexp-sticky-helpers');
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| 12 | var redefine = require('../internals/redefine');
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| 13 | var fails = require('../internals/fails');
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| 14 | var has = require('../internals/has');
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| 15 | var enforceInternalState = require('../internals/internal-state').enforce;
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| 16 | var setSpecies = require('../internals/set-species');
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| 17 | var wellKnownSymbol = require('../internals/well-known-symbol');
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| 18 | var UNSUPPORTED_DOT_ALL = require('../internals/regexp-unsupported-dot-all');
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| 19 | var UNSUPPORTED_NCG = require('../internals/regexp-unsupported-ncg');
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| 20 |
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| 21 | var MATCH = wellKnownSymbol('match');
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| 22 | var NativeRegExp = global.RegExp;
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| 23 | var RegExpPrototype = NativeRegExp.prototype;
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| 24 | // TODO: Use only propper RegExpIdentifierName
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| 25 | var IS_NCG = /^\?<[^\s\d!#%&*+<=>@^][^\s!#%&*+<=>@^]*>/;
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| 26 | var re1 = /a/g;
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| 27 | var re2 = /a/g;
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| 28 |
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| 29 | // "new" should create a new object, old webkit bug
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| 30 | var CORRECT_NEW = new NativeRegExp(re1) !== re1;
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| 31 |
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| 32 | var UNSUPPORTED_Y = stickyHelpers.UNSUPPORTED_Y;
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| 33 |
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| 34 | var BASE_FORCED = DESCRIPTORS &&
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| 35 | (!CORRECT_NEW || UNSUPPORTED_Y || UNSUPPORTED_DOT_ALL || UNSUPPORTED_NCG || fails(function () {
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| 36 | re2[MATCH] = false;
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| 37 | // RegExp constructor can alter flags and IsRegExp works correct with @@match
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| 38 | return NativeRegExp(re1) != re1 || NativeRegExp(re2) == re2 || NativeRegExp(re1, 'i') != '/a/i';
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| 39 | }));
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| 40 |
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| 41 | var handleDotAll = function (string) {
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| 42 | var length = string.length;
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| 43 | var index = 0;
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| 44 | var result = '';
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| 45 | var brackets = false;
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| 46 | var chr;
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| 47 | for (; index <= length; index++) {
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| 48 | chr = string.charAt(index);
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| 49 | if (chr === '\\') {
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| 50 | result += chr + string.charAt(++index);
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| 51 | continue;
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| 52 | }
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| 53 | if (!brackets && chr === '.') {
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| 54 | result += '[\\s\\S]';
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| 55 | } else {
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| 56 | if (chr === '[') {
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| 57 | brackets = true;
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| 58 | } else if (chr === ']') {
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| 59 | brackets = false;
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| 60 | } result += chr;
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| 61 | }
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| 62 | } return result;
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| 63 | };
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| 64 |
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| 65 | var handleNCG = function (string) {
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| 66 | var length = string.length;
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| 67 | var index = 0;
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| 68 | var result = '';
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| 69 | var named = [];
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| 70 | var names = {};
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| 71 | var brackets = false;
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| 72 | var ncg = false;
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| 73 | var groupid = 0;
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| 74 | var groupname = '';
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| 75 | var chr;
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| 76 | for (; index <= length; index++) {
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| 77 | chr = string.charAt(index);
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| 78 | if (chr === '\\') {
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| 79 | chr = chr + string.charAt(++index);
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| 80 | } else if (chr === ']') {
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| 81 | brackets = false;
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| 82 | } else if (!brackets) switch (true) {
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| 83 | case chr === '[':
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| 84 | brackets = true;
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| 85 | break;
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| 86 | case chr === '(':
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| 87 | if (IS_NCG.test(string.slice(index + 1))) {
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| 88 | index += 2;
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| 89 | ncg = true;
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| 90 | }
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| 91 | result += chr;
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| 92 | groupid++;
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| 93 | continue;
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| 94 | case chr === '>' && ncg:
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| 95 | if (groupname === '' || has(names, groupname)) {
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| 96 | throw new SyntaxError('Invalid capture group name');
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| 97 | }
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| 98 | names[groupname] = true;
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| 99 | named.push([groupname, groupid]);
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| 100 | ncg = false;
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| 101 | groupname = '';
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| 102 | continue;
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| 103 | }
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| 104 | if (ncg) groupname += chr;
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| 105 | else result += chr;
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| 106 | } return [result, named];
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| 107 | };
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| 108 |
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| 109 | // `RegExp` constructor
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| 110 | // https://tc39.es/ecma262/#sec-regexp-constructor
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| 111 | if (isForced('RegExp', BASE_FORCED)) {
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| 112 | var RegExpWrapper = function RegExp(pattern, flags) {
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| 113 | var thisIsRegExp = this instanceof RegExpWrapper;
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| 114 | var patternIsRegExp = isRegExp(pattern);
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| 115 | var flagsAreUndefined = flags === undefined;
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| 116 | var groups = [];
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| 117 | var rawPattern = pattern;
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| 118 | var rawFlags, dotAll, sticky, handled, result, state;
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| 119 |
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| 120 | if (!thisIsRegExp && patternIsRegExp && flagsAreUndefined && pattern.constructor === RegExpWrapper) {
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| 121 | return pattern;
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| 122 | }
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| 123 |
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| 124 | if (patternIsRegExp || pattern instanceof RegExpWrapper) {
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| 125 | pattern = pattern.source;
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| 126 | if (flagsAreUndefined) flags = 'flags' in rawPattern ? rawPattern.flags : getFlags.call(rawPattern);
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| 127 | }
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| 128 |
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| 129 | pattern = pattern === undefined ? '' : toString(pattern);
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| 130 | flags = flags === undefined ? '' : toString(flags);
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| 131 | rawPattern = pattern;
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| 132 |
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| 133 | if (UNSUPPORTED_DOT_ALL && 'dotAll' in re1) {
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| 134 | dotAll = !!flags && flags.indexOf('s') > -1;
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| 135 | if (dotAll) flags = flags.replace(/s/g, '');
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| 136 | }
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| 137 |
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| 138 | rawFlags = flags;
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| 139 |
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| 140 | if (UNSUPPORTED_Y && 'sticky' in re1) {
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| 141 | sticky = !!flags && flags.indexOf('y') > -1;
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| 142 | if (sticky) flags = flags.replace(/y/g, '');
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| 143 | }
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| 144 |
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| 145 | if (UNSUPPORTED_NCG) {
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| 146 | handled = handleNCG(pattern);
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| 147 | pattern = handled[0];
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| 148 | groups = handled[1];
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| 149 | }
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| 150 |
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| 151 | result = inheritIfRequired(NativeRegExp(pattern, flags), thisIsRegExp ? this : RegExpPrototype, RegExpWrapper);
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| 152 |
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| 153 | if (dotAll || sticky || groups.length) {
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| 154 | state = enforceInternalState(result);
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| 155 | if (dotAll) {
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| 156 | state.dotAll = true;
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| 157 | state.raw = RegExpWrapper(handleDotAll(pattern), rawFlags);
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| 158 | }
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| 159 | if (sticky) state.sticky = true;
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| 160 | if (groups.length) state.groups = groups;
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| 161 | }
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| 162 |
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| 163 | if (pattern !== rawPattern) try {
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| 164 | // fails in old engines, but we have no alternatives for unsupported regex syntax
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| 165 | createNonEnumerableProperty(result, 'source', rawPattern === '' ? '(?:)' : rawPattern);
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| 166 | } catch (error) { /* empty */ }
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| 167 |
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| 168 | return result;
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| 169 | };
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| 170 |
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| 171 | var proxy = function (key) {
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| 172 | key in RegExpWrapper || defineProperty(RegExpWrapper, key, {
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| 173 | configurable: true,
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| 174 | get: function () { return NativeRegExp[key]; },
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| 175 | set: function (it) { NativeRegExp[key] = it; }
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| 176 | });
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| 177 | };
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| 178 |
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| 179 | for (var keys = getOwnPropertyNames(NativeRegExp), index = 0; keys.length > index;) {
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| 180 | proxy(keys[index++]);
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| 181 | }
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| 182 |
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| 183 | RegExpPrototype.constructor = RegExpWrapper;
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| 184 | RegExpWrapper.prototype = RegExpPrototype;
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| 185 | redefine(global, 'RegExp', RegExpWrapper);
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| 186 | }
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| 187 |
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| 188 | // https://tc39.es/ecma262/#sec-get-regexp-@@species
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| 189 | setSpecies('RegExp');
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