Last change
on this file was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago |
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1 | 'use strict';
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2 | var redefine = require('../internals/redefine');
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3 | var anObject = require('../internals/an-object');
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4 | var $toString = require('../internals/to-string');
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5 | var fails = require('../internals/fails');
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6 | var flags = require('../internals/regexp-flags');
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7 |
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8 | var TO_STRING = 'toString';
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9 | var RegExpPrototype = RegExp.prototype;
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10 | var nativeToString = RegExpPrototype[TO_STRING];
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11 |
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12 | var NOT_GENERIC = fails(function () { return nativeToString.call({ source: 'a', flags: 'b' }) != '/a/b'; });
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13 | // FF44- RegExp#toString has a wrong name
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14 | var INCORRECT_NAME = nativeToString.name != TO_STRING;
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15 |
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16 | // `RegExp.prototype.toString` method
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17 | // https://tc39.es/ecma262/#sec-regexp.prototype.tostring
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18 | if (NOT_GENERIC || INCORRECT_NAME) {
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19 | redefine(RegExp.prototype, TO_STRING, function toString() {
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20 | var R = anObject(this);
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21 | var p = $toString(R.source);
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22 | var rf = R.flags;
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23 | var f = $toString(rf === undefined && R instanceof RegExp && !('flags' in RegExpPrototype) ? flags.call(R) : rf);
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24 | return '/' + p + '/' + f;
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25 | }, { unsafe: true });
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26 | }
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