| // Copyright 2021 The Tint Authors. |
| // |
| // Licensed under the Apache License, Version 2.0(the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| #ifndef SRC_TINT_SEM_SWITCH_STATEMENT_H_ |
| #define SRC_TINT_SEM_SWITCH_STATEMENT_H_ |
| |
| #include <vector> |
| |
| #include "src/tint/sem/block_statement.h" |
| |
| // Forward declarations |
| namespace tint::ast { |
| class CaseStatement; |
| class CaseSelector; |
| class SwitchStatement; |
| } // namespace tint::ast |
| namespace tint::constant { |
| class Value; |
| } // namespace tint::constant |
| namespace tint::sem { |
| class CaseStatement; |
| class CaseSelector; |
| class Expression; |
| } // namespace tint::sem |
| |
| namespace tint::sem { |
| |
| /// Holds semantic information about an switch statement |
| class SwitchStatement final : public Castable<SwitchStatement, CompoundStatement> { |
| public: |
| /// Constructor |
| /// @param declaration the AST node for this switch statement |
| /// @param parent the owning statement |
| /// @param function the owning function |
| SwitchStatement(const ast::SwitchStatement* declaration, |
| const CompoundStatement* parent, |
| const sem::Function* function); |
| |
| /// Destructor |
| ~SwitchStatement() override; |
| |
| /// @return the AST node for this statement |
| const ast::SwitchStatement* Declaration() const; |
| |
| /// @returns the case statements for this switch |
| std::vector<const CaseStatement*>& Cases() { return cases_; } |
| |
| /// @returns the case statements for this switch |
| const std::vector<const CaseStatement*>& Cases() const { return cases_; } |
| |
| private: |
| std::vector<const CaseStatement*> cases_; |
| }; |
| |
| /// Holds semantic information about a switch case statement |
| class CaseStatement final : public Castable<CaseStatement, CompoundStatement> { |
| public: |
| /// Constructor |
| /// @param declaration the AST node for this case statement |
| /// @param parent the owning statement |
| /// @param function the owning function |
| CaseStatement(const ast::CaseStatement* declaration, |
| const CompoundStatement* parent, |
| const sem::Function* function); |
| |
| /// Destructor |
| ~CaseStatement() override; |
| |
| /// @return the AST node for this statement |
| const ast::CaseStatement* Declaration() const; |
| |
| /// @param body the case body block statement |
| void SetBlock(const BlockStatement* body) { body_ = body; } |
| |
| /// @returns the case body block statement |
| const BlockStatement* Body() const { return body_; } |
| |
| /// @returns the selectors for the case |
| std::vector<const CaseSelector*>& Selectors() { return selectors_; } |
| |
| /// @returns the selectors for the case |
| const std::vector<const CaseSelector*>& Selectors() const { return selectors_; } |
| |
| private: |
| const BlockStatement* body_ = nullptr; |
| std::vector<const CaseSelector*> selectors_; |
| }; |
| |
| /// Holds semantic information about a switch case selector |
| class CaseSelector final : public Castable<CaseSelector, Node> { |
| public: |
| /// Constructor |
| /// @param decl the selector declaration |
| /// @param val the case selector value, nullptr for a default selector |
| explicit CaseSelector(const ast::CaseSelector* decl, const constant::Value* val = nullptr); |
| |
| /// Destructor |
| ~CaseSelector() override; |
| |
| /// @returns true if this is a default selector |
| bool IsDefault() const { return val_ == nullptr; } |
| |
| /// @returns the case selector declaration |
| const ast::CaseSelector* Declaration() const; |
| |
| /// @returns the selector constant value, or nullptr if this is the default selector |
| const constant::Value* Value() const { return val_; } |
| |
| private: |
| const ast::CaseSelector* const decl_; |
| const constant::Value* const val_; |
| }; |
| |
| } // namespace tint::sem |
| |
| #endif // SRC_TINT_SEM_SWITCH_STATEMENT_H_ |