1 /*
2  * Copyright (c) 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 #ifndef ES2PANDA_COMPILER_BASE_OPTIONAL_CHAIN_H
17 #define ES2PANDA_COMPILER_BASE_OPTIONAL_CHAIN_H
18 
19 #include <ir/irnode.h>
20 #include <ir/expression.h>
21 
22 namespace panda::es2panda::compiler {
23 class PandaGen;
24 class Label;
25 
26 class OptionalChain {
27 public:
28     explicit OptionalChain(PandaGen *pg, const ir::AstNode *node);
29     ~OptionalChain();
30 
31     void CheckNullish(bool optional, compiler::VReg obj);
32 
33     NO_COPY_SEMANTIC(OptionalChain);
34     NO_MOVE_SEMANTIC(OptionalChain);
35 
36 private:
37     void InitThisVRegForCallExpression();
38 
39     PandaGen *pg_ {};
40     const ir::AstNode *node_ {};
41     Label *label_ {};
42     OptionalChain *prev_ {};
43 };
44 } // namespace panda::es2panda::compiler
45 
46 #endif
47