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// Copyright 2016 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "src/builtins/builtins-utils.h"
#include "src/builtins/builtins.h"
#include "src/code-stub-assembler.h"
namespace v8 {
namespace internal {
// -----------------------------------------------------------------------------
// ES6 section 19.4 Symbol Objects
// ES6 section 19.4.1.1 Symbol ( [ description ] ) for the [[Call]] case.
BUILTIN(SymbolConstructor) {
HandleScope scope(isolate);
Handle<Symbol> result = isolate->factory()->NewSymbol();
Handle<Object> description = args.atOrUndefined(isolate, 1);
if (!description->IsUndefined(isolate)) {
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(isolate, description,
Object::ToString(isolate, description));
result->set_name(*description);
}
return *result;
}
// ES6 section 19.4.1.1 Symbol ( [ description ] ) for the [[Construct]] case.
BUILTIN(SymbolConstructor_ConstructStub) {
HandleScope scope(isolate);
THROW_NEW_ERROR_RETURN_FAILURE(
isolate, NewTypeError(MessageTemplate::kNotConstructor,
isolate->factory()->Symbol_string()));
}
// ES6 section 19.4.2.1 Symbol.for.
BUILTIN(SymbolFor) {
HandleScope scope(isolate);
Handle<Object> key_obj = args.atOrUndefined(isolate, 1);
Handle<String> key;
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(isolate, key,
Object::ToString(isolate, key_obj));
return *isolate->SymbolFor(Heap::kPublicSymbolTableRootIndex, key, false);
}
// ES6 section 19.4.2.5 Symbol.keyFor.
BUILTIN(SymbolKeyFor) {
HandleScope scope(isolate);
Handle<Object> obj = args.atOrUndefined(isolate, 1);
if (!obj->IsSymbol()) {
THROW_NEW_ERROR_RETURN_FAILURE(
isolate, NewTypeError(MessageTemplate::kSymbolKeyFor, obj));
}
Handle<Symbol> symbol = Handle<Symbol>::cast(obj);
DisallowHeapAllocation no_gc;
Object* result;
if (symbol->is_public()) {
result = symbol->name();
DCHECK(result->IsString());
} else {
result = isolate->heap()->undefined_value();
}
DCHECK_EQ(isolate->heap()->public_symbol_table()->SlowReverseLookup(*symbol),
result);
return result;
}
// ES6 section 19.4.3.4 Symbol.prototype [ @@toPrimitive ] ( hint )
void Builtins::Generate_SymbolPrototypeToPrimitive(
compiler::CodeAssemblerState* state) {
typedef compiler::Node Node;
CodeStubAssembler assembler(state);
Node* receiver = assembler.Parameter(0);
Node* context = assembler.Parameter(4);
Node* result =
assembler.ToThisValue(context, receiver, PrimitiveType::kSymbol,
"Symbol.prototype [ @@toPrimitive ]");
assembler.Return(result);
}
// ES6 section 19.4.3.2 Symbol.prototype.toString ( )
void Builtins::Generate_SymbolPrototypeToString(
compiler::CodeAssemblerState* state) {
typedef compiler::Node Node;
CodeStubAssembler assembler(state);
Node* receiver = assembler.Parameter(0);
Node* context = assembler.Parameter(3);
Node* value = assembler.ToThisValue(context, receiver, PrimitiveType::kSymbol,
"Symbol.prototype.toString");
Node* result =
assembler.CallRuntime(Runtime::kSymbolDescriptiveString, context, value);
assembler.Return(result);
}
// ES6 section 19.4.3.3 Symbol.prototype.valueOf ( )
void Builtins::Generate_SymbolPrototypeValueOf(
compiler::CodeAssemblerState* state) {
typedef compiler::Node Node;
CodeStubAssembler assembler(state);
Node* receiver = assembler.Parameter(0);
Node* context = assembler.Parameter(3);
Node* result = assembler.ToThisValue(
context, receiver, PrimitiveType::kSymbol, "Symbol.prototype.valueOf");
assembler.Return(result);
}
} // namespace internal
} // namespace v8
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