1 /**
2 * Copyright (c) 2021-2024 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16 #include "nullType.h"
17
18 namespace ark::es2panda::checker {
ToString(std::stringstream & ss,bool precise) const19 void NullType::ToString(std::stringstream &ss, [[maybe_unused]] bool precise) const
20 {
21 ss << "null";
22 }
23
Identical(TypeRelation * relation,Type * other)24 void NullType::Identical(TypeRelation *relation, Type *other)
25 {
26 if (other->IsNullType()) {
27 relation->Result(true);
28 }
29 }
30
AssignmentSource(TypeRelation * relation,Type * target)31 bool NullType::AssignmentSource(TypeRelation *relation, [[maybe_unused]] Type *target)
32 {
33 relation->Result(!target->IsNeverType());
34 return relation->IsTrue();
35 }
36
AssignmentTarget(TypeRelation * relation,Type * source)37 void NullType::AssignmentTarget([[maybe_unused]] TypeRelation *relation, [[maybe_unused]] Type *source) {}
38
GetTypeFacts() const39 TypeFacts NullType::GetTypeFacts() const
40 {
41 return TypeFacts::NULL_FACTS;
42 }
43
Instantiate(ArenaAllocator * allocator,TypeRelation * relation,GlobalTypesHolder * globalTypes)44 Type *NullType::Instantiate([[maybe_unused]] ArenaAllocator *allocator, [[maybe_unused]] TypeRelation *relation,
45 [[maybe_unused]] GlobalTypesHolder *globalTypes)
46 {
47 return this;
48 }
49 } // namespace ark::es2panda::checker
50