1 var DESCRIPTORS = require('../internals/descriptors');
2 var global = require('../internals/global');
3 var uncurryThis = require('../internals/function-uncurry-this');
4 var isForced = require('../internals/is-forced');
5 var inheritIfRequired = require('../internals/inherit-if-required');
6 var createNonEnumerableProperty = require('../internals/create-non-enumerable-property');
7 var defineProperty = require('../internals/object-define-property').f;
8 var getOwnPropertyNames = require('../internals/object-get-own-property-names').f;
9 var isPrototypeOf = require('../internals/object-is-prototype-of');
10 var isRegExp = require('../internals/is-regexp');
11 var toString = require('../internals/to-string');
12 var regExpFlags = require('../internals/regexp-flags');
13 var stickyHelpers = require('../internals/regexp-sticky-helpers');
14 var redefine = require('../internals/redefine');
15 var fails = require('../internals/fails');
16 var hasOwn = require('../internals/has-own-property');
17 var enforceInternalState = require('../internals/internal-state').enforce;
18 var setSpecies = require('../internals/set-species');
19 var wellKnownSymbol = require('../internals/well-known-symbol');
20 var UNSUPPORTED_DOT_ALL = require('../internals/regexp-unsupported-dot-all');
21 var UNSUPPORTED_NCG = require('../internals/regexp-unsupported-ncg');
23 var MATCH = wellKnownSymbol('match');
24 var NativeRegExp = global.RegExp;
25 var RegExpPrototype = NativeRegExp.prototype;
26 var SyntaxError = global.SyntaxError;
27 var getFlags = uncurryThis(regExpFlags);
28 var exec = uncurryThis(RegExpPrototype.exec);
29 var charAt = uncurryThis(''.charAt);
30 var replace = uncurryThis(''.replace);
31 var stringIndexOf = uncurryThis(''.indexOf);
32 var stringSlice = uncurryThis(''.slice);
33 // TODO: Use only propper RegExpIdentifierName
34 var IS_NCG = /^\?<[^\s\d!#%&*+<=>@^][^\s!#%&*+<=>@^]*>/;
38 // "new" should create a new object, old webkit bug
39 var CORRECT_NEW = new NativeRegExp(re1) !== re1;
41 var MISSED_STICKY = stickyHelpers.MISSED_STICKY;
42 var UNSUPPORTED_Y = stickyHelpers.UNSUPPORTED_Y;
44 var BASE_FORCED = DESCRIPTORS &&
45 (!CORRECT_NEW || MISSED_STICKY || UNSUPPORTED_DOT_ALL || UNSUPPORTED_NCG || fails(function () {
47 // RegExp constructor can alter flags and IsRegExp works correct with @@match
48 return NativeRegExp(re1) != re1 || NativeRegExp(re2) == re2 || NativeRegExp(re1, 'i') != '/a/i';
51 var handleDotAll = function (string) {
52 var length = string.length;
57 for (; index <= length; index++) {
58 chr = charAt(string, index);
60 result += chr + charAt(string, ++index);
63 if (!brackets && chr === '.') {
68 } else if (chr === ']') {
75 var handleNCG = function (string) {
76 var length = string.length;
86 for (; index <= length; index++) {
87 chr = charAt(string, index);
89 chr = chr + charAt(string, ++index);
90 } else if (chr === ']') {
92 } else if (!brackets) switch (true) {
97 if (exec(IS_NCG, stringSlice(string, index + 1))) {
104 case chr === '>' && ncg:
105 if (groupname === '' || hasOwn(names, groupname)) {
106 throw new SyntaxError('Invalid capture group name');
108 names[groupname] = true;
109 named[named.length] = [groupname, groupid];
114 if (ncg) groupname += chr;
116 } return [result, named];
119 // `RegExp` constructor
120 // https://tc39.es/ecma262/#sec-regexp-constructor
121 if (isForced('RegExp', BASE_FORCED)) {
122 var RegExpWrapper = function RegExp(pattern, flags) {
123 var thisIsRegExp = isPrototypeOf(RegExpPrototype, this);
124 var patternIsRegExp = isRegExp(pattern);
125 var flagsAreUndefined = flags === undefined;
127 var rawPattern = pattern;
128 var rawFlags, dotAll, sticky, handled, result, state;
130 if (!thisIsRegExp && patternIsRegExp && flagsAreUndefined && pattern.constructor === RegExpWrapper) {
134 if (patternIsRegExp || isPrototypeOf(RegExpPrototype, pattern)) {
135 pattern = pattern.source;
136 if (flagsAreUndefined) flags = 'flags' in rawPattern ? rawPattern.flags : getFlags(rawPattern);
139 pattern = pattern === undefined ? '' : toString(pattern);
140 flags = flags === undefined ? '' : toString(flags);
141 rawPattern = pattern;
143 if (UNSUPPORTED_DOT_ALL && 'dotAll' in re1) {
144 dotAll = !!flags && stringIndexOf(flags, 's') > -1;
145 if (dotAll) flags = replace(flags, /s/g, '');
150 if (MISSED_STICKY && 'sticky' in re1) {
151 sticky = !!flags && stringIndexOf(flags, 'y') > -1;
152 if (sticky && UNSUPPORTED_Y) flags = replace(flags, /y/g, '');
155 if (UNSUPPORTED_NCG) {
156 handled = handleNCG(pattern);
157 pattern = handled[0];
161 result = inheritIfRequired(NativeRegExp(pattern, flags), thisIsRegExp ? this : RegExpPrototype, RegExpWrapper);
163 if (dotAll || sticky || groups.length) {
164 state = enforceInternalState(result);
167 state.raw = RegExpWrapper(handleDotAll(pattern), rawFlags);
169 if (sticky) state.sticky = true;
170 if (groups.length) state.groups = groups;
173 if (pattern !== rawPattern) try {
174 // fails in old engines, but we have no alternatives for unsupported regex syntax
175 createNonEnumerableProperty(result, 'source', rawPattern === '' ? '(?:)' : rawPattern);
176 } catch (error) { /* empty */ }
181 var proxy = function (key) {
182 key in RegExpWrapper || defineProperty(RegExpWrapper, key, {
184 get: function () { return NativeRegExp[key]; },
185 set: function (it) { NativeRegExp[key] = it; }
189 for (var keys = getOwnPropertyNames(NativeRegExp), index = 0; keys.length > index;) {
190 proxy(keys[index++]);
193 RegExpPrototype.constructor = RegExpWrapper;
194 RegExpWrapper.prototype = RegExpPrototype;
195 redefine(global, 'RegExp', RegExpWrapper);
198 // https://tc39.es/ecma262/#sec-get-regexp-@@species
199 setSpecies('RegExp');