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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_ELSE_STATEMENT_H_
#define SRC_AST_ELSE_STATEMENT_H_
#include <vector>
#include "src/ast/block_statement.h"
#include "src/ast/expression.h"
namespace tint {
namespace ast {
/// An else statement
class ElseStatement : public Castable<ElseStatement, Statement> {
public:
/// Constructor
/// @param program_id the identifier of the program that owns this node
/// @param source the source information
/// @param condition the else condition
/// @param body the else body
ElseStatement(ProgramID program_id,
const Source& source,
Expression* condition,
BlockStatement* body);
/// Move constructor
ElseStatement(ElseStatement&&);
~ElseStatement() override;
/// @returns the else condition or nullptr if none set
Expression* condition() const { return condition_; }
/// @returns true if the else has a condition
bool HasCondition() const { return condition_ != nullptr; }
/// @returns the else body
const BlockStatement* body() const { return body_; }
/// @returns the else body
BlockStatement* body() { return body_; }
/// Clones this node and all transitive child nodes using the `CloneContext`
/// `ctx`.
/// @param ctx the clone context
/// @return the newly cloned node
ElseStatement* 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:
ElseStatement(const ElseStatement&) = delete;
Expression* const condition_;
BlockStatement* const body_;
};
/// A list of else statements
using ElseStatementList = std::vector<ElseStatement*>;
} // namespace ast
} // namespace tint
#endif // SRC_AST_ELSE_STATEMENT_H_