1// Copyright 2015 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#ifndef V8_PROPERTY_DESCRIPTOR_H_
6#define V8_PROPERTY_DESCRIPTOR_H_
7
8
9#include "src/handles.h"
10#include "src/property-details.h"
11
12
13namespace v8 {
14namespace internal {
15
16class Isolate;
17class Object;
18class PropertyDescriptorObject;
19
20class PropertyDescriptor {
21 public:
22 PropertyDescriptor()
23 : enumerable_(false),
24 has_enumerable_(false),
25 configurable_(false),
26 has_configurable_(false),
27 writable_(false),
28 has_writable_(false) {}
29
30 // ES6 6.2.4.1
31 static bool IsAccessorDescriptor(PropertyDescriptor* desc) {
32 return desc->has_get() || desc->has_set();
33 }
34
35 // ES6 6.2.4.2
36 static bool IsDataDescriptor(PropertyDescriptor* desc) {
37 return desc->has_value() || desc->has_writable();
38 }
39
40 // ES6 6.2.4.3
41 static bool IsGenericDescriptor(PropertyDescriptor* desc) {
42 return !IsAccessorDescriptor(desc) && !IsDataDescriptor(desc);
43 }
44
45 // ES6 6.2.4.4
46 Handle<Object> ToObject(Isolate* isolate);
47
48 Handle<PropertyDescriptorObject> ToPropertyDescriptorObject(Isolate* isolate);
49
50 // ES6 6.2.4.5
51 static bool ToPropertyDescriptor(Isolate* isolate, Handle<Object> obj,
52 PropertyDescriptor* desc);
53
54 // ES6 6.2.4.6
55 static void CompletePropertyDescriptor(Isolate* isolate,
56 PropertyDescriptor* desc);
57
58 bool is_empty() const {
59 return !has_enumerable() && !has_configurable() && !has_writable() &&
60 !has_value() && !has_get() && !has_set();
61 }
62
63 bool IsRegularAccessorProperty() const {
64 return has_configurable() && has_enumerable() && !has_value() &&
65 !has_writable() && has_get() && has_set();
66 }
67
68 bool IsRegularDataProperty() const {
69 return has_configurable() && has_enumerable() && has_value() &&
70 has_writable() && !has_get() && !has_set();
71 }
72
73 bool enumerable() const { return enumerable_; }
74 void set_enumerable(bool enumerable) {
75 enumerable_ = enumerable;
76 has_enumerable_ = true;
77 }
78 bool has_enumerable() const { return has_enumerable_; }
79
80 bool configurable() const { return configurable_; }
81 void set_configurable(bool configurable) {
82 configurable_ = configurable;
83 has_configurable_ = true;
84 }
85 bool has_configurable() const { return has_configurable_; }
86
87 Handle<Object> value() const { return value_; }
88 void set_value(Handle<Object> value) { value_ = value; }
89 bool has_value() const { return !value_.is_null(); }
90
91 bool writable() const { return writable_; }
92 void set_writable(bool writable) {
93 writable_ = writable;
94 has_writable_ = true;
95 }
96 bool has_writable() const { return has_writable_; }
97
98 Handle<Object> get() const { return get_; }
99 void set_get(Handle<Object> get) { get_ = get; }
100 bool has_get() const { return !get_.is_null(); }
101
102 Handle<Object> set() const { return set_; }
103 void set_set(Handle<Object> set) { set_ = set; }
104 bool has_set() const { return !set_.is_null(); }
105
106 Handle<Object> name() const { return name_; }
107 void set_name(Handle<Object> name) { name_ = name; }
108
109 PropertyAttributes ToAttributes() {
110 return static_cast<PropertyAttributes>(
111 (has_enumerable() && !enumerable() ? DONT_ENUM : NONE) |
112 (has_configurable() && !configurable() ? DONT_DELETE : NONE) |
113 (has_writable() && !writable() ? READ_ONLY : NONE));
114 }
115
116 private:
117 bool enumerable_ : 1;
118 bool has_enumerable_ : 1;
119 bool configurable_ : 1;
120 bool has_configurable_ : 1;
121 bool writable_ : 1;
122 bool has_writable_ : 1;
123 Handle<Object> value_;
124 Handle<Object> get_;
125 Handle<Object> set_;
126 Handle<Object> name_;
127
128 // Some compilers (Xcode 5.1, ARM GCC 4.9) insist on having a copy
129 // constructor for std::vector<PropertyDescriptor>, so we can't
130 // DISALLOW_COPY_AND_ASSIGN(PropertyDescriptor); here.
131};
132
133} // namespace internal
134} // namespace v8
135
136#endif // V8_PROPERTY_DESCRIPTOR_H_
137