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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_LOOP_STATEMENT_H_
#define SRC_AST_LOOP_STATEMENT_H_
#include "src/ast/block_statement.h"
namespace tint {
namespace ast {
/// A loop statement
class LoopStatement : public Castable<LoopStatement, Statement> {
public:
/// Constructor
/// @param program_id the identifier of the program that owns this node
/// @param source the loop statement source
/// @param body the body statements
/// @param continuing the continuing statements
LoopStatement(ProgramID program_id,
const Source& source,
BlockStatement* body,
BlockStatement* continuing);
/// Move constructor
LoopStatement(LoopStatement&&);
~LoopStatement() override;
/// @returns the body statements
const BlockStatement* body() const { return body_; }
/// @returns the body statements
BlockStatement* body() { return body_; }
/// @returns the continuing statements
const BlockStatement* continuing() const { return continuing_; }
/// @returns the continuing statements
BlockStatement* continuing() { return continuing_; }
/// @returns true if there are continuing statements in the loop
bool has_continuing() const {
return continuing_ != nullptr && !continuing_->empty();
}
/// Clones this node and all transitive child nodes using the `CloneContext`
/// `ctx`.
/// @param ctx the clone context
/// @return the newly cloned node
LoopStatement* 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:
LoopStatement(const LoopStatement&) = delete;
BlockStatement* const body_;
BlockStatement* const continuing_;
};
} // namespace ast
} // namespace tint
#endif // SRC_AST_LOOP_STATEMENT_H_