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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_ALIAS_H_
#define SRC_AST_ALIAS_H_
#include <string>
#include "src/ast/type_decl.h"
namespace tint {
namespace ast {
/// A type alias type. Holds a name and pointer to another type.
class Alias : public Castable<Alias, TypeDecl> {
public:
/// Constructor
/// @param program_id the identifier of the program that owns this node
/// @param source the source of this node
/// @param name the symbol for the alias
/// @param subtype the alias'd type
Alias(ProgramID program_id,
const Source& source,
const Symbol& name,
Type* subtype);
/// Move constructor
Alias(Alias&&);
/// Destructor
~Alias() override;
/// [DEPRECATED] use name()
/// @returns the alias symbol
Symbol symbol() const { return name(); }
/// @returns the alias type
Type* type() const { return subtype_; }
/// @returns the type_name for this type
std::string type_name() const override;
/// Clones this type and all transitive types using the `CloneContext` `ctx`.
/// @param ctx the clone context
/// @return the newly cloned type
Alias* Clone(CloneContext* ctx) const override;
private:
Type* const subtype_;
std::string const type_name_;
};
} // namespace ast
} // namespace tint
#endif // SRC_AST_ALIAS_H_