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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_CASE_STATEMENT_H_
#define SRC_AST_CASE_STATEMENT_H_
#include <memory>
#include <utility>
#include <vector>
#include "src/ast/block_statement.h"
#include "src/ast/expression.h"
#include "src/ast/int_literal.h"
#include "src/ast/statement.h"
namespace tint {
namespace ast {
/// A list of case literals
using CaseSelectorList = std::vector<std::unique_ptr<ast::IntLiteral>>;
/// A case statement
class CaseStatement : public Statement {
public:
/// Constructor
CaseStatement();
/// Constructor
/// Creates a default case statement
/// @param body the case body
explicit CaseStatement(std::unique_ptr<BlockStatement> body);
/// Constructor
/// @param selectors the case selectors
/// @param body the case body
CaseStatement(CaseSelectorList selectors,
std::unique_ptr<BlockStatement> body);
/// Constructor
/// @param source the source information
/// @param selectors the case selectors
/// @param body the case body
CaseStatement(const Source& source,
CaseSelectorList selectors,
std::unique_ptr<BlockStatement> body);
/// Move constructor
CaseStatement(CaseStatement&&);
~CaseStatement() override;
/// Sets the selectors for the case statement
/// @param selectors the selectors to set
void set_selectors(CaseSelectorList selectors) {
selectors_ = std::move(selectors);
}
/// @returns the case selectors, empty if none set
const CaseSelectorList& selectors() const { return selectors_; }
/// @returns true if this is a default statement
bool IsDefault() const { return selectors_.empty(); }
/// Sets the case body
/// @param body the case body
void set_body(std::unique_ptr<BlockStatement> body) {
body_ = std::move(body);
}
/// @returns the case body
const BlockStatement* body() const { return body_.get(); }
/// @returns true if this is a case statement
bool IsCase() 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:
CaseStatement(const CaseStatement&) = delete;
CaseSelectorList selectors_;
std::unique_ptr<BlockStatement> body_;
};
/// A list of unique case statements
using CaseStatementList = std::vector<std::unique_ptr<CaseStatement>>;
} // namespace ast
} // namespace tint
#endif // SRC_AST_CASE_STATEMENT_H_