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-inl.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             : // ES #sec-symbol-objects
      15             : 
      16             : // ES #sec-symbol-constructor
      17       41124 : BUILTIN(SymbolConstructor) {
      18             :   HandleScope scope(isolate);
      19       30843 :   if (!args.new_target()->IsUndefined(isolate)) {  // [[Construct]]
      20         126 :     THROW_NEW_ERROR_RETURN_FAILURE(
      21             :         isolate, NewTypeError(MessageTemplate::kNotConstructor,
      22             :                               isolate->factory()->Symbol_string()));
      23             :   }
      24             :   // [[Call]]
      25       10218 :   Handle<Symbol> result = isolate->factory()->NewSymbol();
      26             :   Handle<Object> description = args.atOrUndefined(isolate, 1);
      27       20436 :   if (!description->IsUndefined(isolate)) {
      28        3723 :     ASSIGN_RETURN_FAILURE_ON_EXCEPTION(isolate, description,
      29             :                                        Object::ToString(isolate, description));
      30        1848 :     result->set_name(*description);
      31             :   }
      32       10209 :   return *result;
      33             : }
      34             : 
      35             : // ES6 section 19.4.2.1 Symbol.for.
      36         528 : BUILTIN(SymbolFor) {
      37             :   HandleScope scope(isolate);
      38         132 :   Handle<Object> key_obj = args.atOrUndefined(isolate, 1);
      39             :   Handle<String> key;
      40         264 :   ASSIGN_RETURN_FAILURE_ON_EXCEPTION(isolate, key,
      41             :                                      Object::ToString(isolate, key_obj));
      42         264 :   return *isolate->SymbolFor(RootIndex::kPublicSymbolTable, key, false);
      43             : }
      44             : 
      45             : // ES6 section 19.4.2.5 Symbol.keyFor.
      46         396 : BUILTIN(SymbolKeyFor) {
      47             :   HandleScope scope(isolate);
      48             :   Handle<Object> obj = args.atOrUndefined(isolate, 1);
      49         198 :   if (!obj->IsSymbol()) {
      50          36 :     THROW_NEW_ERROR_RETURN_FAILURE(
      51             :         isolate, NewTypeError(MessageTemplate::kSymbolKeyFor, obj));
      52             :   }
      53          81 :   Handle<Symbol> symbol = Handle<Symbol>::cast(obj);
      54             :   DisallowHeapAllocation no_gc;
      55             :   Object result;
      56          81 :   if (symbol->is_public()) {
      57          54 :     result = symbol->name();
      58             :     DCHECK(result->IsString());
      59             :   } else {
      60             :     result = ReadOnlyRoots(isolate).undefined_value();
      61             :   }
      62             :   DCHECK_EQ(isolate->heap()->public_symbol_table()->SlowReverseLookup(*symbol),
      63             :             result);
      64          81 :   return result;
      65             : }
      66             : 
      67             : }  // namespace internal
      68      183867 : }  // namespace v8