Add C++ implementation of Object.defineProperties

src/property-descriptor.h

+// Copyright 2015 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.
+
+#ifndef V8_PROPERTY_DESCRIPTOR_H_
+#define V8_PROPERTY_DESCRIPTOR_H_
+
+
+#include "src/handles.h"
+#include "src/property-details.h"
+
+
+namespace v8 {
+namespace internal {
+
+class Isolate;
+class Object;
+
+class PropertyDescriptor {
+ public:
+  PropertyDescriptor()
+      : enumerable_(false),
+        has_enumerable_(false),
+        configurable_(false),
+        has_configurable_(false),
+        writable_(false),
+        has_writable_(false) {}
+
+  // ES6 6.2.4.1
+  static bool IsAccessorDescriptor(PropertyDescriptor* desc) {
+    return desc->has_get() || desc->has_set();
+  }
+
+  // ES6 6.2.4.2
+  static bool IsDataDescriptor(PropertyDescriptor* desc) {
+    return desc->has_value() || desc->has_writable();
+  }
+
+  // ES6 6.2.4.3
+  static bool IsGenericDescriptor(PropertyDescriptor* desc) {
+    return !IsAccessorDescriptor(desc) && !IsDataDescriptor(desc);
+  }
+
+  bool is_empty() const {
+    return !has_enumerable() && !has_configurable() && !has_writable() &&
+           !has_value() && !has_get() && !has_set();
+  }
+
+  bool enumerable() const { return enumerable_; }
+  void set_enumerable(bool enumerable) {
+    enumerable_ = enumerable;
+    has_enumerable_ = true;
+  }
+  bool has_enumerable() const { return has_enumerable_; }
+
+  bool configurable() const { return configurable_; }
+  void set_configurable(bool configurable) {
+    configurable_ = configurable;
+    has_configurable_ = true;
+  }
+  bool has_configurable() const { return has_configurable_; }
+
+  Handle<Object> value() const { return value_; }
+  void set_value(Handle<Object> value) { value_ = value; }
+  bool has_value() const { return !value_.is_null(); }
+
+  bool writable() const { return writable_; }
+  void set_writable(bool writable) {
+    writable_ = writable;
+    has_writable_ = true;
+  }
+  bool has_writable() const { return has_writable_; }
+
+  Handle<Object> get() const { return get_; }
+  void set_get(Handle<Object> get) { get_ = get; }
+  bool has_get() const { return !get_.is_null(); }
+
+  Handle<Object> set() const { return set_; }
+  void set_set(Handle<Object> set) { set_ = set; }
+  bool has_set() const { return !set_.is_null(); }
+
+  Handle<Object> name() const { return name_; }
+  void set_name(Handle<Object> name) { name_ = name; }
+
+  PropertyAttributes ToAttributes() {
+    return static_cast<PropertyAttributes>(
+        (has_enumerable() && !enumerable() ? DONT_ENUM : NONE) |
+        (has_configurable() && !configurable() ? DONT_DELETE : NONE) |
+        (has_writable() && !writable() ? READ_ONLY : NONE));
+  }
+
+  static bool ToPropertyDescriptor(Isolate* isolate, Handle<Object> obj,
+                                   PropertyDescriptor* desc);
+
+ private:
+  bool enumerable_ : 1;
+  bool has_enumerable_ : 1;
+  bool configurable_ : 1;
+  bool has_configurable_ : 1;
+  bool writable_ : 1;
+  bool has_writable_ : 1;
+  Handle<Object> value_;
+  Handle<Object> get_;
+  Handle<Object> set_;
+  Handle<Object> name_;
+
+  // Some compilers (Xcode 5.1, ARM GCC 4.9) insist on having a copy
+  // constructor for std::vector<PropertyDescriptor>, so we can't
+  // DISALLOW_COPY_AND_ASSIGN(PropertyDescriptor); here.
+};
+
+}  // namespace internal
+}  // namespace v8
+
+#endif  // V8_PROPERTY_DESCRIPTOR_H_