1 // Copyright 2020 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_BLOCK_STATEMENT_H_ 16 #define SRC_AST_BLOCK_STATEMENT_H_ 17 18 #include <utility> 19 20 #include "src/ast/statement.h" 21 22 namespace tint { 23 namespace ast { 24 25 /// A block statement 26 class BlockStatement : public Castable<BlockStatement, Statement> { 27 public: 28 /// Constructor 29 /// @param program_id the identifier of the program that owns this node 30 /// @param source the block statement source 31 /// @param statements the statements 32 BlockStatement(ProgramID program_id, 33 const Source& source, 34 const StatementList& statements); 35 /// Move constructor 36 BlockStatement(BlockStatement&&); 37 ~BlockStatement() override; 38 39 /// @returns true if the block has no statements Empty()40 bool Empty() const { return statements.empty(); } 41 42 /// @returns the last statement in the block or nullptr if block empty Last()43 const Statement* Last() const { 44 return statements.empty() ? nullptr : statements.back(); 45 } 46 47 /// Clones this node and all transitive child nodes using the `CloneContext` 48 /// `ctx`. 49 /// @param ctx the clone context 50 /// @return the newly cloned node 51 const BlockStatement* Clone(CloneContext* ctx) const override; 52 53 /// the statement list 54 const StatementList statements; 55 }; 56 57 } // namespace ast 58 } // namespace tint 59 60 #endif // SRC_AST_BLOCK_STATEMENT_H_ 61