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rOACCT/node_modules/core-js/modules/es.regexp.constructor.js
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es.regexp.constructor.js
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var DESCRIPTORS = require('../internals/descriptors');
var global = require('../internals/global');
var uncurryThis = require('../internals/function-uncurry-this');
var isForced = require('../internals/is-forced');
var inheritIfRequired = require('../internals/inherit-if-required');
var createNonEnumerableProperty = require('../internals/create-non-enumerable-property');
var getOwnPropertyNames = require('../internals/object-get-own-property-names').f;
var isPrototypeOf = require('../internals/object-is-prototype-of');
var isRegExp = require('../internals/is-regexp');
var toString = require('../internals/to-string');
var getRegExpFlags = require('../internals/regexp-get-flags');
var stickyHelpers = require('../internals/regexp-sticky-helpers');
var proxyAccessor = require('../internals/proxy-accessor');
var defineBuiltIn = require('../internals/define-built-in');
var fails = require('../internals/fails');
var hasOwn = require('../internals/has-own-property');
var enforceInternalState = require('../internals/internal-state').enforce;
var setSpecies = require('../internals/set-species');
var wellKnownSymbol = require('../internals/well-known-symbol');
var UNSUPPORTED_DOT_ALL = require('../internals/regexp-unsupported-dot-all');
var UNSUPPORTED_NCG = require('../internals/regexp-unsupported-ncg');
var MATCH = wellKnownSymbol('match');
var NativeRegExp = global.RegExp;
var RegExpPrototype = NativeRegExp.prototype;
var SyntaxError = global.SyntaxError;
var exec = uncurryThis(RegExpPrototype.exec);
var charAt = uncurryThis(''.charAt);
var replace = uncurryThis(''.replace);
var stringIndexOf = uncurryThis(''.indexOf);
var stringSlice = uncurryThis(''.slice);
// TODO: Use only proper RegExpIdentifierName
var IS_NCG = /^\?<[^\s\d!#%&*+<=>@^][^\s!#%&*+<=>@^]*>/;
var re1 = /a/g;
var re2 = /a/g;
// "new" should create a new object, old webkit bug
var CORRECT_NEW = new NativeRegExp(re1) !== re1;
var MISSED_STICKY = stickyHelpers.MISSED_STICKY;
var UNSUPPORTED_Y = stickyHelpers.UNSUPPORTED_Y;
var BASE_FORCED = DESCRIPTORS &&
(!CORRECT_NEW || MISSED_STICKY || UNSUPPORTED_DOT_ALL || UNSUPPORTED_NCG || fails(function () {
re2[MATCH] = false;
// RegExp constructor can alter flags and IsRegExp works correct with @@match
return NativeRegExp(re1) != re1 || NativeRegExp(re2) == re2 || NativeRegExp(re1, 'i') != '/a/i';
}));
var handleDotAll = function (string) {
var length = string.length;
var index = 0;
var result = '';
var brackets = false;
var chr;
for (; index <= length; index++) {
chr = charAt(string, index);
if (chr === '\\') {
result += chr + charAt(string, ++index);
continue;
}
if (!brackets && chr === '.') {
result += '[\\s\\S]';
} else {
if (chr === '[') {
brackets = true;
} else if (chr === ']') {
brackets = false;
} result += chr;
}
} return result;
};
var handleNCG = function (string) {
var length = string.length;
var index = 0;
var result = '';
var named = [];
var names = {};
var brackets = false;
var ncg = false;
var groupid = 0;
var groupname = '';
var chr;
for (; index <= length; index++) {
chr = charAt(string, index);
if (chr === '\\') {
chr = chr + charAt(string, ++index);
} else if (chr === ']') {
brackets = false;
} else if (!brackets) switch (true) {
case chr === '[':
brackets = true;
break;
case chr === '(':
if (exec(IS_NCG, stringSlice(string, index + 1))) {
index += 2;
ncg = true;
}
result += chr;
groupid++;
continue;
case chr === '>' && ncg:
if (groupname === '' || hasOwn(names, groupname)) {
throw new SyntaxError('Invalid capture group name');
}
names[groupname] = true;
named[named.length] = [groupname, groupid];
ncg = false;
groupname = '';
continue;
}
if (ncg) groupname += chr;
else result += chr;
} return [result, named];
};
// `RegExp` constructor
// https://tc39.es/ecma262/#sec-regexp-constructor
if (isForced('RegExp', BASE_FORCED)) {
var RegExpWrapper = function RegExp(pattern, flags) {
var thisIsRegExp = isPrototypeOf(RegExpPrototype, this);
var patternIsRegExp = isRegExp(pattern);
var flagsAreUndefined = flags === undefined;
var groups = [];
var rawPattern = pattern;
var rawFlags, dotAll, sticky, handled, result, state;
if (!thisIsRegExp && patternIsRegExp && flagsAreUndefined && pattern.constructor === RegExpWrapper) {
return pattern;
}
if (patternIsRegExp || isPrototypeOf(RegExpPrototype, pattern)) {
pattern = pattern.source;
if (flagsAreUndefined) flags = getRegExpFlags(rawPattern);
}
pattern = pattern === undefined ? '' : toString(pattern);
flags = flags === undefined ? '' : toString(flags);
rawPattern = pattern;
if (UNSUPPORTED_DOT_ALL && 'dotAll' in re1) {
dotAll = !!flags && stringIndexOf(flags, 's') > -1;
if (dotAll) flags = replace(flags, /s/g, '');
}
rawFlags = flags;
if (MISSED_STICKY && 'sticky' in re1) {
sticky = !!flags && stringIndexOf(flags, 'y') > -1;
if (sticky && UNSUPPORTED_Y) flags = replace(flags, /y/g, '');
}
if (UNSUPPORTED_NCG) {
handled = handleNCG(pattern);
pattern = handled[0];
groups = handled[1];
}
result = inheritIfRequired(NativeRegExp(pattern, flags), thisIsRegExp ? this : RegExpPrototype, RegExpWrapper);
if (dotAll || sticky || groups.length) {
state = enforceInternalState(result);
if (dotAll) {
state.dotAll = true;
state.raw = RegExpWrapper(handleDotAll(pattern), rawFlags);
}
if (sticky) state.sticky = true;
if (groups.length) state.groups = groups;
}
if (pattern !== rawPattern) try {
// fails in old engines, but we have no alternatives for unsupported regex syntax
createNonEnumerableProperty(result, 'source', rawPattern === '' ? '(?:)' : rawPattern);
} catch (error) { /* empty */ }
return result;
};
for (var keys = getOwnPropertyNames(NativeRegExp), index = 0; keys.length > index;) {
proxyAccessor(RegExpWrapper, NativeRegExp, keys[index++]);
}
RegExpPrototype.constructor = RegExpWrapper;
RegExpWrapper.prototype = RegExpPrototype;
defineBuiltIn(global, 'RegExp', RegExpWrapper, { constructor: true });
}
// https://tc39.es/ecma262/#sec-get-regexp-@@species
setSpecies('RegExp');
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