Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 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 |
| 3 | // found in the LICENSE file. |
| 4 | |
| 5 | (function(global, utils) { |
| 6 | |
| 7 | "use strict"; |
| 8 | |
| 9 | %CheckIsBootstrapping(); |
| 10 | |
| 11 | // ------------------------------------------------------------------- |
| 12 | // Imports |
| 13 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 14 | var GlobalSymbol = global.Symbol; |
| 15 | var hasInstanceSymbol = utils.ImportNow("has_instance_symbol"); |
| 16 | var isConcatSpreadableSymbol = |
| 17 | utils.ImportNow("is_concat_spreadable_symbol"); |
| 18 | var iteratorSymbol = utils.ImportNow("iterator_symbol"); |
| 19 | var MakeTypeError; |
| 20 | var toPrimitiveSymbol = utils.ImportNow("to_primitive_symbol"); |
| 21 | var toStringTagSymbol = utils.ImportNow("to_string_tag_symbol"); |
| 22 | var unscopablesSymbol = utils.ImportNow("unscopables_symbol"); |
| 23 | |
| 24 | utils.Import(function(from) { |
| 25 | MakeTypeError = from.MakeTypeError; |
| 26 | }); |
| 27 | |
| 28 | // ------------------------------------------------------------------- |
| 29 | |
| 30 | // 19.4.3.4 Symbol.prototype [ @@toPrimitive ] ( hint ) |
| 31 | function SymbolToPrimitive(hint) { |
| 32 | if (!(IS_SYMBOL(this) || IS_SYMBOL_WRAPPER(this))) { |
| 33 | throw MakeTypeError(kIncompatibleMethodReceiver, |
| 34 | "Symbol.prototype [ @@toPrimitive ]", this); |
| 35 | } |
| 36 | return %_ValueOf(this); |
| 37 | } |
| 38 | |
| 39 | |
| 40 | function SymbolToString() { |
| 41 | if (!(IS_SYMBOL(this) || IS_SYMBOL_WRAPPER(this))) { |
| 42 | throw MakeTypeError(kIncompatibleMethodReceiver, |
| 43 | "Symbol.prototype.toString", this); |
| 44 | } |
| 45 | return %SymbolDescriptiveString(%_ValueOf(this)); |
| 46 | } |
| 47 | |
| 48 | |
| 49 | function SymbolValueOf() { |
| 50 | if (!(IS_SYMBOL(this) || IS_SYMBOL_WRAPPER(this))) { |
| 51 | throw MakeTypeError(kIncompatibleMethodReceiver, |
| 52 | "Symbol.prototype.valueOf", this); |
| 53 | } |
| 54 | return %_ValueOf(this); |
| 55 | } |
| 56 | |
| 57 | |
| 58 | function SymbolFor(key) { |
| 59 | key = TO_STRING(key); |
| 60 | var registry = %SymbolRegistry(); |
| 61 | if (IS_UNDEFINED(registry.for[key])) { |
| 62 | var symbol = %CreateSymbol(key); |
| 63 | registry.for[key] = symbol; |
| 64 | registry.keyFor[symbol] = key; |
| 65 | } |
| 66 | return registry.for[key]; |
| 67 | } |
| 68 | |
| 69 | |
| 70 | function SymbolKeyFor(symbol) { |
| 71 | if (!IS_SYMBOL(symbol)) throw MakeTypeError(kSymbolKeyFor, symbol); |
| 72 | return %SymbolRegistry().keyFor[symbol]; |
| 73 | } |
| 74 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 75 | // ------------------------------------------------------------------- |
| 76 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 77 | utils.InstallConstants(GlobalSymbol, [ |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 78 | "hasInstance", hasInstanceSymbol, |
| 79 | "isConcatSpreadable", isConcatSpreadableSymbol, |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 80 | "iterator", iteratorSymbol, |
| 81 | // TODO(yangguo): expose when implemented. |
| 82 | // "match", matchSymbol, |
| 83 | // "replace", replaceSymbol, |
| 84 | // "search", searchSymbol, |
| 85 | // "split, splitSymbol, |
| 86 | "toPrimitive", toPrimitiveSymbol, |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame^] | 87 | "toStringTag", toStringTagSymbol, |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 88 | "unscopables", unscopablesSymbol, |
| 89 | ]); |
| 90 | |
| 91 | utils.InstallFunctions(GlobalSymbol, DONT_ENUM, [ |
| 92 | "for", SymbolFor, |
| 93 | "keyFor", SymbolKeyFor |
| 94 | ]); |
| 95 | |
| 96 | %AddNamedProperty( |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 97 | GlobalSymbol.prototype, toStringTagSymbol, "Symbol", DONT_ENUM | READ_ONLY); |
| 98 | |
| 99 | utils.InstallFunctions(GlobalSymbol.prototype, DONT_ENUM | READ_ONLY, [ |
| 100 | toPrimitiveSymbol, SymbolToPrimitive |
| 101 | ]); |
| 102 | |
| 103 | utils.InstallFunctions(GlobalSymbol.prototype, DONT_ENUM, [ |
| 104 | "toString", SymbolToString, |
| 105 | "valueOf", SymbolValueOf |
| 106 | ]); |
| 107 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 108 | // ------------------------------------------------------------------- |
| 109 | // Exports |
| 110 | |
| 111 | utils.Export(function(to) { |
| 112 | to.SymbolToString = SymbolToString; |
| 113 | }) |
| 114 | |
| 115 | }) |