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| 1 // Copyright 2013 the V8 project authors. All rights reserved. | 1 // Copyright 2013 the V8 project authors. All rights reserved. | 
| 2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be | 
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. | 
| 4 | 4 | 
| 5 // Expects following symbols to be set in the bootstrapper during genesis: | 5 // Expects following symbols to be set in the bootstrapper during genesis: | 
| 6 // - symbolHasInstance | 6 // - symbolHasInstance | 
| 7 // - symbolIsConcatSpreadable | 7 // - symbolIsConcatSpreadable | 
| 8 // - symbolIsRegExp | 8 // - symbolIsRegExp | 
| 9 // - symbolIterator | 9 // - symbolIterator | 
| 10 // - symbolToStringTag | 10 // - symbolToStringTag | 
| 11 // - symbolUnscopables | 11 // - symbolUnscopables | 
| 12 | 12 | 
| 13 var $symbolToString; | 13 var $symbolToString; | 
| 14 | 14 | 
| 15 (function() { | 15 (function() { | 
| 16 | 16 | 
| 17 "use strict"; | 17 "use strict"; | 
| 18 | 18 | 
| 19 %CheckIsBootstrapping(); | 19 %CheckIsBootstrapping(); | 
| 20 | 20 | 
| 21 var GlobalObject = global.Object; | 21 var GlobalObject = global.Object; | 
| 22 var GlobalSymbol = global.Symbol; | 22 var GlobalSymbol = global.Symbol; | 
| 23 | 23 | 
| 24 // ------------------------------------------------------------------- | 24 // ------------------------------------------------------------------- | 
| 25 | 25 | 
| 26 function SymbolConstructor(x) { | 26 function SymbolConstructor(x) { | 
| 27   if (%_IsConstructCall()) { | 27   if (%_IsConstructCall()) throw MakeTypeError(kNotConstructor, "Symbol"); | 
| 28     throw MakeTypeError('not_constructor', ["Symbol"]); |  | 
| 29   } |  | 
| 30   // NOTE: Passing in a Symbol value will throw on ToString(). | 28   // NOTE: Passing in a Symbol value will throw on ToString(). | 
| 31   return %CreateSymbol(IS_UNDEFINED(x) ? x : ToString(x)); | 29   return %CreateSymbol(IS_UNDEFINED(x) ? x : ToString(x)); | 
| 32 } | 30 } | 
| 33 | 31 | 
| 34 | 32 | 
| 35 function SymbolToString() { | 33 function SymbolToString() { | 
| 36   if (!(IS_SYMBOL(this) || IS_SYMBOL_WRAPPER(this))) { | 34   if (!(IS_SYMBOL(this) || IS_SYMBOL_WRAPPER(this))) { | 
| 37     throw MakeTypeError(kIncompatibleMethodReceiver, | 35     throw MakeTypeError(kIncompatibleMethodReceiver, | 
| 38                         "Symbol.prototype.toString", this); | 36                         "Symbol.prototype.toString", this); | 
| 39   } | 37   } | 
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| 110   "valueOf", SymbolValueOf | 108   "valueOf", SymbolValueOf | 
| 111 ]); | 109 ]); | 
| 112 | 110 | 
| 113 InstallFunctions(GlobalObject, DONT_ENUM, [ | 111 InstallFunctions(GlobalObject, DONT_ENUM, [ | 
| 114   "getOwnPropertySymbols", ObjectGetOwnPropertySymbols | 112   "getOwnPropertySymbols", ObjectGetOwnPropertySymbols | 
| 115 ]); | 113 ]); | 
| 116 | 114 | 
| 117 $symbolToString = SymbolToString; | 115 $symbolToString = SymbolToString; | 
| 118 | 116 | 
| 119 })(); | 117 })(); | 
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