1 /**
2 * Copyright (c) 2021-2022 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 "neverType.h"
17
18 namespace panda::es2panda::checker {
19
ToString(std::stringstream & ss) const20 void NeverType::ToString(std::stringstream &ss) const
21 {
22 ss << "never";
23 }
24
GetTypeFacts() const25 TypeFacts NeverType::GetTypeFacts() const
26 {
27 return TypeFacts::NONE;
28 }
29
Identical(TypeRelation * relation,Type * other)30 void NeverType::Identical(TypeRelation *relation, Type *other)
31 {
32 if (other->IsNeverType()) {
33 relation->Result(true);
34 }
35 }
36
AssignmentTarget(TypeRelation * relation,Type * source)37 void NeverType::AssignmentTarget(TypeRelation *relation, [[maybe_unused]] Type *source)
38 {
39 relation->Result(false);
40 }
41
AssignmentSource(TypeRelation * relation,Type * target)42 bool NeverType::AssignmentSource(TypeRelation *relation, [[maybe_unused]] Type *target)
43 {
44 relation->Result(true);
45 return true;
46 }
47
Instantiate(ArenaAllocator * allocator,TypeRelation * relation,GlobalTypesHolder * globalTypes)48 Type *NeverType::Instantiate([[maybe_unused]] ArenaAllocator *allocator, [[maybe_unused]] TypeRelation *relation,
49 [[maybe_unused]] GlobalTypesHolder *globalTypes)
50 {
51 return this;
52 }
53
54 } // namespace panda::es2panda::checker
55