You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
118 lines
3.9 KiB
118 lines
3.9 KiB
'use strict';
|
|
/* eslint-disable regexp/no-empty-capturing-group, regexp/no-empty-group, regexp/no-lazy-ends -- testing */
|
|
/* eslint-disable regexp/no-useless-quantifier -- testing */
|
|
var call = require('../internals/function-call');
|
|
var uncurryThis = require('../internals/function-uncurry-this');
|
|
var toString = require('../internals/to-string');
|
|
var regexpFlags = require('../internals/regexp-flags');
|
|
var stickyHelpers = require('../internals/regexp-sticky-helpers');
|
|
var shared = require('../internals/shared');
|
|
var create = require('../internals/object-create');
|
|
var getInternalState = require('../internals/internal-state').get;
|
|
var UNSUPPORTED_DOT_ALL = require('../internals/regexp-unsupported-dot-all');
|
|
var UNSUPPORTED_NCG = require('../internals/regexp-unsupported-ncg');
|
|
|
|
var nativeReplace = shared('native-string-replace', String.prototype.replace);
|
|
var nativeExec = RegExp.prototype.exec;
|
|
var patchedExec = nativeExec;
|
|
var charAt = uncurryThis(''.charAt);
|
|
var indexOf = uncurryThis(''.indexOf);
|
|
var replace = uncurryThis(''.replace);
|
|
var stringSlice = uncurryThis(''.slice);
|
|
|
|
var UPDATES_LAST_INDEX_WRONG = (function () {
|
|
var re1 = /a/;
|
|
var re2 = /b*/g;
|
|
call(nativeExec, re1, 'a');
|
|
call(nativeExec, re2, 'a');
|
|
return re1.lastIndex !== 0 || re2.lastIndex !== 0;
|
|
})();
|
|
|
|
var UNSUPPORTED_Y = stickyHelpers.BROKEN_CARET;
|
|
|
|
// nonparticipating capturing group, copied from es5-shim's String#split patch.
|
|
var NPCG_INCLUDED = /()??/.exec('')[1] !== undefined;
|
|
|
|
var PATCH = UPDATES_LAST_INDEX_WRONG || NPCG_INCLUDED || UNSUPPORTED_Y || UNSUPPORTED_DOT_ALL || UNSUPPORTED_NCG;
|
|
|
|
if (PATCH) {
|
|
patchedExec = function exec(string) {
|
|
var re = this;
|
|
var state = getInternalState(re);
|
|
var str = toString(string);
|
|
var raw = state.raw;
|
|
var result, reCopy, lastIndex, match, i, object, group;
|
|
|
|
if (raw) {
|
|
raw.lastIndex = re.lastIndex;
|
|
result = call(patchedExec, raw, str);
|
|
re.lastIndex = raw.lastIndex;
|
|
return result;
|
|
}
|
|
|
|
var groups = state.groups;
|
|
var sticky = UNSUPPORTED_Y && re.sticky;
|
|
var flags = call(regexpFlags, re);
|
|
var source = re.source;
|
|
var charsAdded = 0;
|
|
var strCopy = str;
|
|
|
|
if (sticky) {
|
|
flags = replace(flags, 'y', '');
|
|
if (indexOf(flags, 'g') === -1) {
|
|
flags += 'g';
|
|
}
|
|
|
|
strCopy = stringSlice(str, re.lastIndex);
|
|
// Support anchored sticky behavior.
|
|
if (re.lastIndex > 0 && (!re.multiline || re.multiline && charAt(str, re.lastIndex - 1) !== '\n')) {
|
|
source = '(?: ' + source + ')';
|
|
strCopy = ' ' + strCopy;
|
|
charsAdded++;
|
|
}
|
|
// ^(? + rx + ) is needed, in combination with some str slicing, to
|
|
// simulate the 'y' flag.
|
|
reCopy = new RegExp('^(?:' + source + ')', flags);
|
|
}
|
|
|
|
if (NPCG_INCLUDED) {
|
|
reCopy = new RegExp('^' + source + '$(?!\\s)', flags);
|
|
}
|
|
if (UPDATES_LAST_INDEX_WRONG) lastIndex = re.lastIndex;
|
|
|
|
match = call(nativeExec, sticky ? reCopy : re, strCopy);
|
|
|
|
if (sticky) {
|
|
if (match) {
|
|
match.input = stringSlice(match.input, charsAdded);
|
|
match[0] = stringSlice(match[0], charsAdded);
|
|
match.index = re.lastIndex;
|
|
re.lastIndex += match[0].length;
|
|
} else re.lastIndex = 0;
|
|
} else if (UPDATES_LAST_INDEX_WRONG && match) {
|
|
re.lastIndex = re.global ? match.index + match[0].length : lastIndex;
|
|
}
|
|
if (NPCG_INCLUDED && match && match.length > 1) {
|
|
// Fix browsers whose `exec` methods don't consistently return `undefined`
|
|
// for NPCG, like IE8. NOTE: This doesn't work for /(.?)?/
|
|
call(nativeReplace, match[0], reCopy, function () {
|
|
for (i = 1; i < arguments.length - 2; i++) {
|
|
if (arguments[i] === undefined) match[i] = undefined;
|
|
}
|
|
});
|
|
}
|
|
|
|
if (match && groups) {
|
|
match.groups = object = create(null);
|
|
for (i = 0; i < groups.length; i++) {
|
|
group = groups[i];
|
|
object[group[0]] = match[group[1]];
|
|
}
|
|
}
|
|
|
|
return match;
|
|
};
|
|
}
|
|
|
|
module.exports = patchedExec;
|