| // Copyright 2020 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_AST_BLOCK_STATEMENT_H_ |
| #define SRC_AST_BLOCK_STATEMENT_H_ |
| |
| #include <utility> |
| |
| #include "src/ast/statement.h" |
| |
| namespace tint { |
| namespace ast { |
| |
| /// A block statement |
| class BlockStatement : public Castable<BlockStatement, Statement> { |
| public: |
| /// Constructor |
| /// @param program_id the identifier of the program that owns this node |
| /// @param source the block statement source |
| /// @param statements the statements |
| BlockStatement(ProgramID program_id, |
| const Source& source, |
| const StatementList& statements); |
| /// Move constructor |
| BlockStatement(BlockStatement&&); |
| ~BlockStatement() override; |
| |
| /// @returns the StatementList |
| const StatementList& list() const { return statements_; } |
| |
| /// @returns true if the block is empty |
| bool empty() const { return statements_.empty(); } |
| /// @returns the number of statements directly in the block |
| size_t size() const { return statements_.size(); } |
| |
| /// @returns the last statement in the block or nullptr if block empty |
| const Statement* last() const { |
| return statements_.empty() ? nullptr : statements_.back(); |
| } |
| /// @returns the last statement in the block or nullptr if block empty |
| Statement* last() { |
| return statements_.empty() ? nullptr : statements_.back(); |
| } |
| |
| /// Retrieves the statement at `idx` |
| /// @param idx the index. The index is not bounds checked. |
| /// @returns the statement at `idx` |
| Statement* get(size_t idx) const { return statements_[idx]; } |
| |
| /// Retrieves the statement at `idx` |
| /// @param idx the index. The index is not bounds checked. |
| /// @returns the statement at `idx` |
| Statement* operator[](size_t idx) const { return statements_[idx]; } |
| |
| /// @returns the beginning iterator |
| StatementList::const_iterator begin() const { return statements_.begin(); } |
| /// @returns the ending iterator |
| StatementList::const_iterator end() const { return statements_.end(); } |
| |
| /// @returns the statement list |
| const StatementList& statements() const { return statements_; } |
| |
| /// Clones this node and all transitive child nodes using the `CloneContext` |
| /// `ctx`. |
| /// @param ctx the clone context |
| /// @return the newly cloned node |
| BlockStatement* Clone(CloneContext* ctx) const override; |
| |
| /// Writes a representation of the node to the output stream |
| /// @param sem the semantic info for the program |
| /// @param out the stream to write to |
| /// @param indent number of spaces to indent the node when writing |
| void to_str(const sem::Info& sem, |
| std::ostream& out, |
| size_t indent) const override; |
| |
| private: |
| BlockStatement(const BlockStatement&) = delete; |
| |
| StatementList const statements_; |
| }; |
| |
| } // namespace ast |
| } // namespace tint |
| |
| #endif // SRC_AST_BLOCK_STATEMENT_H_ |