Ben Clayton 41f8d2ad52 Use 'final' specifier on leaf classes
Tint makes heavy use of RTTI via virtual methods. Give the compiler the
opportunity to optimize away some of these virtuals.

Bug: tint:1383
Change-Id: I28edfaa0a05bb1a9c506c61c0084542c0aeb37f0
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/82745
Reviewed-by: James Price <jrprice@google.com>
Reviewed-by: David Neto <dneto@google.com>
Kokoro: Kokoro <noreply+kokoro@google.com>
Commit-Queue: Ben Clayton <bclayton@google.com>
2022-03-07 18:37:46 +00:00

55 lines
1.6 KiB
C++

// 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_