Line data Source code
1 : // Copyright 2016 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 : #include "src/builtins/builtins-utils.h"
6 : #include "src/builtins/builtins.h"
7 : #include "src/counters.h"
8 : #include "src/objects-inl.h"
9 :
10 : namespace v8 {
11 : namespace internal {
12 :
13 : // -----------------------------------------------------------------------------
14 : // ES6 section 19.4 Symbol Objects
15 :
16 : // ES6 section 19.4.1.1 Symbol ( [ description ] ) for the [[Call]] case.
17 17541 : BUILTIN(SymbolConstructor) {
18 : HandleScope scope(isolate);
19 5847 : Handle<Symbol> result = isolate->factory()->NewSymbol();
20 : Handle<Object> description = args.atOrUndefined(isolate, 1);
21 5847 : if (!description->IsUndefined(isolate)) {
22 4770 : ASSIGN_RETURN_FAILURE_ON_EXCEPTION(isolate, description,
23 : Object::ToString(isolate, description));
24 2371 : result->set_name(*description);
25 : }
26 5833 : return *result;
27 : }
28 :
29 : // ES6 section 19.4.1.1 Symbol ( [ description ] ) for the [[Construct]] case.
30 300 : BUILTIN(SymbolConstructor_ConstructStub) {
31 : HandleScope scope(isolate);
32 300 : THROW_NEW_ERROR_RETURN_FAILURE(
33 : isolate, NewTypeError(MessageTemplate::kNotConstructor,
34 : isolate->factory()->Symbol_string()));
35 : }
36 :
37 : // ES6 section 19.4.2.1 Symbol.for.
38 609 : BUILTIN(SymbolFor) {
39 : HandleScope scope(isolate);
40 203 : Handle<Object> key_obj = args.atOrUndefined(isolate, 1);
41 : Handle<String> key;
42 406 : ASSIGN_RETURN_FAILURE_ON_EXCEPTION(isolate, key,
43 : Object::ToString(isolate, key_obj));
44 406 : return *isolate->SymbolFor(Heap::kPublicSymbolTableRootIndex, key, false);
45 : }
46 :
47 : // ES6 section 19.4.2.5 Symbol.keyFor.
48 462 : BUILTIN(SymbolKeyFor) {
49 : HandleScope scope(isolate);
50 : Handle<Object> obj = args.atOrUndefined(isolate, 1);
51 154 : if (!obj->IsSymbol()) {
52 56 : THROW_NEW_ERROR_RETURN_FAILURE(
53 : isolate, NewTypeError(MessageTemplate::kSymbolKeyFor, obj));
54 : }
55 : Handle<Symbol> symbol = Handle<Symbol>::cast(obj);
56 : DisallowHeapAllocation no_gc;
57 : Object* result;
58 126 : if (symbol->is_public()) {
59 : result = symbol->name();
60 : DCHECK(result->IsString());
61 : } else {
62 42 : result = isolate->heap()->undefined_value();
63 : }
64 : DCHECK_EQ(isolate->heap()->public_symbol_table()->SlowReverseLookup(*symbol),
65 : result);
66 126 : return result;
67 : }
68 :
69 : } // namespace internal
70 : } // namespace v8
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