runtime-symbol.cc

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// Copyright 2014 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/execution/arguments-inl.h"
#include "src/execution/isolate-inl.h"
#include "src/heap/heap-inl.h"  // For ToBoolean. TODO(jkummerow): Drop.
#include "src/objects/objects-inl.h"
#include "src/strings/string-builder-inl.h"
 
namespace v8 {
namespace internal {
 
RUNTIME_FUNCTION(Runtime_CreatePrivateSymbol) {
  HandleScope scope(isolate);
  DCHECK_GE(1, args.length());
  DirectHandle<Symbol> symbol = isolate->factory()->NewPrivateSymbol();
  if (args.length() == 1) {
    DirectHandle<Object> description = args.at(0);
    CHECK(IsString(*description) || IsUndefined(*description, isolate));
    if (IsString(*description))
      symbol->set_description(Cast<String>(*description));
  }
  return *symbol;
}
 
RUNTIME_FUNCTION(Runtime_CreatePrivateBrandSymbol) {
  HandleScope scope(isolate);
  DCHECK_EQ(1, args.length());
  DirectHandle<String> name = args.at<String>(0);
  DirectHandle<Symbol> symbol = isolate->factory()->NewPrivateNameSymbol(name);
  symbol->set_is_private_brand();
  return *symbol;
}
 
RUNTIME_FUNCTION(Runtime_CreatePrivateNameSymbol) {
  HandleScope scope(isolate);
  DCHECK_EQ(1, args.length());
  DirectHandle<String> name = args.at<String>(0);
  DirectHandle<Symbol> symbol = isolate->factory()->NewPrivateNameSymbol(name);
  return *symbol;
}
 
RUNTIME_FUNCTION(Runtime_SymbolDescriptiveString) {
  HandleScope scope(isolate);
  DCHECK_EQ(1, args.length());
  DirectHandle<Symbol> symbol = args.at<Symbol>(0);
  IncrementalStringBuilder builder(isolate);
  builder.AppendCStringLiteral("Symbol(");
  if (IsString(symbol->description())) {
    builder.AppendString(
        direct_handle(Cast<String>(symbol->description()), isolate));
  }
  builder.AppendCharacter(')');
  RETURN_RESULT_OR_FAILURE(isolate, builder.Finish());
}
 
 
RUNTIME_FUNCTION(Runtime_SymbolIsPrivate) {
  SealHandleScope shs(isolate);
  DCHECK_EQ(1, args.length());
  auto symbol = Cast<Symbol>(args[0]);
  return isolate->heap()->ToBoolean(symbol->is_private());
}
}  // namespace internal
}  // namespace v8