V8 API Reference, 7.2.502.16 (for Deno 0.2.4)
field-type.cc
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/field-type.h"
6 
7 #include "src/handles-inl.h"
8 #include "src/objects-inl.h"
9 #include "src/objects/smi.h"
10 #include "src/ostreams.h"
11 
12 namespace v8 {
13 namespace internal {
14 
15 // static
16 FieldType FieldType::None() { return FieldType(Smi::FromInt(2).ptr()); }
17 
18 // static
19 FieldType FieldType::Any() { return FieldType(Smi::FromInt(1).ptr()); }
20 
21 // static
22 Handle<FieldType> FieldType::None(Isolate* isolate) {
23  return handle(None(), isolate);
24 }
25 
26 // static
27 Handle<FieldType> FieldType::Any(Isolate* isolate) {
28  return handle(Any(), isolate);
29 }
30 
31 // static
32 FieldType FieldType::Class(Map map) { return FieldType::cast(map); }
33 
34 // static
35 Handle<FieldType> FieldType::Class(Handle<Map> map, Isolate* isolate) {
36  return handle(Class(*map), isolate);
37 }
38 
39 // static
40 FieldType FieldType::cast(Object* object) {
41  DCHECK(object == None() || object == Any() || object->IsMap());
42  return FieldType(object->ptr());
43 }
44 
45 bool FieldType::IsClass() const { return this->IsMap(); }
46 
47 Map FieldType::AsClass() const {
48  DCHECK(IsClass());
49  return Map::cast(*this);
50 }
51 
52 bool FieldType::NowStable() const {
53  return !this->IsClass() || AsClass()->is_stable();
54 }
55 
56 bool FieldType::NowIs(FieldType other) const {
57  if (other->IsAny()) return true;
58  if (IsNone()) return true;
59  if (other->IsNone()) return false;
60  if (IsAny()) return false;
61  DCHECK(IsClass());
62  DCHECK(other->IsClass());
63  return *this == other;
64 }
65 
66 bool FieldType::NowIs(Handle<FieldType> other) const { return NowIs(*other); }
67 
68 void FieldType::PrintTo(std::ostream& os) const {
69  if (IsAny()) {
70  os << "Any";
71  } else if (IsNone()) {
72  os << "None";
73  } else {
74  DCHECK(IsClass());
75  os << "Class(" << static_cast<void*>(AsClass()) << ")";
76  }
77 }
78 
79 bool FieldType::NowContains(Object* value) const {
80  if (*this == Any()) return true;
81  if (*this == None()) return false;
82  if (!value->IsHeapObject()) return false;
83  return HeapObject::cast(value)->map() == Map::cast(*this);
84 }
85 
86 } // namespace internal
87 } // namespace v8
Definition: libplatform.h:13