// 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_TINT_AST_ALIAS_H_
#define SRC_TINT_AST_ALIAS_H_

#include <string>

#include "src/tint/ast/type_decl.h"

namespace tint {
namespace ast {

/// A type alias type. Holds a name and pointer to another type.
class Alias final : public Castable<Alias, TypeDecl> {
 public:
  /// Constructor
  /// @param pid the identifier of the program that owns this node
  /// @param src the source of this node
  /// @param name the symbol for the alias
  /// @param subtype the alias'd type
  Alias(ProgramID pid,
        const Source& src,
        const Symbol& name,
        const Type* subtype);
  /// Move constructor
  Alias(Alias&&);
  /// Destructor
  ~Alias() override;

  /// Clones this type and all transitive types using the `CloneContext` `ctx`.
  /// @param ctx the clone context
  /// @return the newly cloned type
  const Alias* Clone(CloneContext* ctx) const override;

  /// the alias type
  const Type* const type;
};

}  // namespace ast
}  // namespace tint

#endif  // SRC_TINT_AST_ALIAS_H_