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1 // Copyright 2011 the V8 project authors. All rights reserved. | 1 // Copyright 2011 the V8 project authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef V8_AST_VARIABLES_H_ | 5 #ifndef V8_AST_VARIABLES_H_ |
6 #define V8_AST_VARIABLES_H_ | 6 #define V8_AST_VARIABLES_H_ |
7 | 7 |
8 #include "src/ast/ast-value-factory.h" | 8 #include "src/ast/ast-value-factory.h" |
9 #include "src/globals.h" | 9 #include "src/globals.h" |
10 #include "src/zone.h" | 10 #include "src/zone.h" |
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95 VariableLocation location() const { | 95 VariableLocation location() const { |
96 return LocationField::decode(bit_field_); | 96 return LocationField::decode(bit_field_); |
97 } | 97 } |
98 VariableKind kind() const { return VariableKindField::decode(bit_field_); } | 98 VariableKind kind() const { return VariableKindField::decode(bit_field_); } |
99 InitializationFlag initialization_flag() const { | 99 InitializationFlag initialization_flag() const { |
100 return InitializationFlagField::decode(bit_field_); | 100 return InitializationFlagField::decode(bit_field_); |
101 } | 101 } |
102 | 102 |
103 int index() const { return index_; } | 103 int index() const { return index_; } |
104 | 104 |
| 105 bool IsExport() const { |
| 106 DCHECK(location() == VariableLocation::MODULE); |
| 107 return index() == 0; |
| 108 } |
| 109 |
105 void AllocateTo(VariableLocation location, int index) { | 110 void AllocateTo(VariableLocation location, int index) { |
106 DCHECK(IsUnallocated() || | 111 DCHECK(IsUnallocated() || |
107 (this->location() == location && this->index() == index)); | 112 (this->location() == location && this->index() == index)); |
108 bit_field_ = LocationField::update(bit_field_, location); | 113 bit_field_ = LocationField::update(bit_field_, location); |
109 DCHECK_EQ(location, this->location()); | 114 DCHECK_EQ(location, this->location()); |
110 index_ = index; | 115 index_ = index; |
111 } | 116 } |
112 | 117 |
113 static InitializationFlag DefaultInitializationFlag(VariableMode mode) { | 118 static InitializationFlag DefaultInitializationFlag(VariableMode mode) { |
114 DCHECK(IsDeclaredVariableMode(mode)); | 119 DCHECK(IsDeclaredVariableMode(mode)); |
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140 class InitializationFlagField | 145 class InitializationFlagField |
141 : public BitField16<InitializationFlag, IsUsedField::kNext, 2> {}; | 146 : public BitField16<InitializationFlag, IsUsedField::kNext, 2> {}; |
142 class MaybeAssignedFlagField | 147 class MaybeAssignedFlagField |
143 : public BitField16<MaybeAssignedFlag, InitializationFlagField::kNext, | 148 : public BitField16<MaybeAssignedFlag, InitializationFlagField::kNext, |
144 2> {}; | 149 2> {}; |
145 }; | 150 }; |
146 } // namespace internal | 151 } // namespace internal |
147 } // namespace v8 | 152 } // namespace v8 |
148 | 153 |
149 #endif // V8_AST_VARIABLES_H_ | 154 #endif // V8_AST_VARIABLES_H_ |
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