26 lines
978 B
JavaScript
26 lines
978 B
JavaScript
'use strict';
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var redefine = require('../internals/redefine');
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var anObject = require('../internals/an-object');
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var fails = require('../internals/fails');
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var flags = require('../internals/regexp-flags');
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var TO_STRING = 'toString';
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var RegExpPrototype = RegExp.prototype;
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var nativeToString = RegExpPrototype[TO_STRING];
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var NOT_GENERIC = fails(function () { return nativeToString.call({ source: 'a', flags: 'b' }) != '/a/b'; });
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// FF44- RegExp#toString has a wrong name
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var INCORRECT_NAME = nativeToString.name != TO_STRING;
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// `RegExp.prototype.toString` method
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// https://tc39.es/ecma262/#sec-regexp.prototype.tostring
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if (NOT_GENERIC || INCORRECT_NAME) {
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redefine(RegExp.prototype, TO_STRING, function toString() {
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var R = anObject(this);
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var p = String(R.source);
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var rf = R.flags;
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var f = String(rf === undefined && R instanceof RegExp && !('flags' in RegExpPrototype) ? flags.call(R) : rf);
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return '/' + p + '/' + f;
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}, { unsafe: true });
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}
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