1 // Copyright 2021 The Tint Authors. 2 // 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 #ifndef SRC_AST_PHONY_EXPRESSION_H_ 16 #define SRC_AST_PHONY_EXPRESSION_H_ 17 18 #include "src/ast/expression.h" 19 20 namespace tint { 21 namespace ast { 22 23 /// Represents the `_` of a phony assignment `_ = <expr>` 24 /// @see https://www.w3.org/TR/WGSL/#phony-assignment-section 25 class PhonyExpression : public Castable<PhonyExpression, Expression> { 26 public: 27 /// Constructor 28 /// @param pid the identifier of the program that owns this node 29 /// @param src the source of this node 30 PhonyExpression(ProgramID pid, const Source& src); 31 /// Move constructor 32 PhonyExpression(PhonyExpression&&); 33 ~PhonyExpression() override; 34 35 /// Clones this node and all transitive child nodes using the `CloneContext` 36 /// `ctx`. 37 /// @param ctx the clone context 38 /// @return the newly cloned node 39 const PhonyExpression* Clone(CloneContext* ctx) const override; 40 }; 41 42 } // namespace ast 43 } // namespace tint 44 45 #endif // SRC_AST_PHONY_EXPRESSION_H_ 46