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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_IF_STATEMENT_H_
#define SRC_AST_IF_STATEMENT_H_
#include <memory>
#include <utility>
#include "src/ast/block_statement.h"
#include "src/ast/else_statement.h"
#include "src/ast/expression.h"
#include "src/ast/statement.h"
namespace tint {
namespace ast {
/// An if statement
class IfStatement : public Statement {
public:
/// Constructor
IfStatement();
/// Constructor
/// @param condition the if condition
/// @param body the if body
IfStatement(std::unique_ptr<Expression> condition,
std::unique_ptr<BlockStatement> body);
/// Constructor
/// @param source the source information
/// @param condition the if condition
/// @param body the if body
IfStatement(const Source& source,
std::unique_ptr<Expression> condition,
std::unique_ptr<BlockStatement> body);
/// Move constructor
IfStatement(IfStatement&&);
~IfStatement() override;
/// Sets the condition for the if statement
/// @param condition the condition to set
void set_condition(std::unique_ptr<Expression> condition) {
condition_ = std::move(condition);
}
/// @returns the if condition or nullptr if none set
Expression* condition() const { return condition_.get(); }
/// Sets the if body
/// @param body the if body
void set_body(std::unique_ptr<BlockStatement> body) {
body_ = std::move(body);
}
/// @returns the if body
const BlockStatement* body() const { return body_.get(); }
/// Sets the else statements
/// @param else_statements the else statements to set
void set_else_statements(ElseStatementList else_statements) {
else_statements_ = std::move(else_statements);
}
/// @returns the else statements
const ElseStatementList& else_statements() const { return else_statements_; }
/// @returns true if there are else statements
bool has_else_statements() const { return !else_statements_.empty(); }
/// @returns true if this is a if statement
bool IsIf() const override;
/// @returns true if the node is valid
bool IsValid() const override;
/// Writes a representation of the node to the output stream
/// @param out the stream to write to
/// @param indent number of spaces to indent the node when writing
void to_str(std::ostream& out, size_t indent) const override;
private:
IfStatement(const IfStatement&) = delete;
std::unique_ptr<Expression> condition_;
std::unique_ptr<BlockStatement> body_;
ElseStatementList else_statements_;
};
} // namespace ast
} // namespace tint
#endif // SRC_AST_IF_STATEMENT_H_