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31 lines
1.3 KiB
31 lines
1.3 KiB
3 years ago
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'use strict';
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var uncurryThis = require('../internals/function-uncurry-this');
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var PROPER_FUNCTION_NAME = require('../internals/function-name').PROPER;
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var redefine = require('../internals/redefine');
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var anObject = require('../internals/an-object');
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var isPrototypeOf = require('../internals/object-is-prototype-of');
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var $toString = require('../internals/to-string');
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var fails = require('../internals/fails');
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var regExpFlags = require('../internals/regexp-flags');
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var TO_STRING = 'toString';
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var RegExpPrototype = RegExp.prototype;
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var n$ToString = RegExpPrototype[TO_STRING];
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var getFlags = uncurryThis(regExpFlags);
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var NOT_GENERIC = fails(function () { return n$ToString.call({ source: 'a', flags: 'b' }) != '/a/b'; });
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// FF44- RegExp#toString has a wrong name
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var INCORRECT_NAME = PROPER_FUNCTION_NAME && n$ToString.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 = $toString(R.source);
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var rf = R.flags;
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var f = $toString(rf === undefined && isPrototypeOf(RegExpPrototype, R) && !('flags' in RegExpPrototype) ? getFlags(R) : rf);
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return '/' + p + '/' + f;
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}, { unsafe: true });
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}
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