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// 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 true if the block has no statements
bool Empty() const { return statements.empty(); }
/// @returns the last statement in the block or nullptr if block empty
const Statement* Last() const {
return statements.empty() ? nullptr : statements.back();
}
/// Clones this node and all transitive child nodes using the `CloneContext`
/// `ctx`.
/// @param ctx the clone context
/// @return the newly cloned node
const BlockStatement* Clone(CloneContext* ctx) const override;
/// the statement list
const StatementList statements;
};
} // namespace ast
} // namespace tint
#endif // SRC_AST_BLOCK_STATEMENT_H_