| // Copyright 2018 The Fuchsia Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #pragma once |
| |
| namespace lockdep { |
| |
| // Utility type to capture a reference to a global variable in the type system. |
| // This type can capture an lvalue reference to an object with static storage |
| // duration, either external or internal linkage. |
| template <typename T, T& Reference> |
| struct GlobalReference {}; |
| |
| // Utility type that returns the value type of a GlobalReference and passes |
| // other types through unchanged. |
| template <typename T> |
| struct RemoveGlobalReferenceType { |
| using Type = T; |
| }; |
| template <typename T, T& Reference> |
| struct RemoveGlobalReferenceType<GlobalReference<T, Reference>> { |
| using Type = T; |
| }; |
| |
| // Alias to simplify type expressions for RemoveGlobalReferenceType. |
| template <typename T> |
| using RemoveGlobalReference = typename RemoveGlobalReferenceType<T>::Type; |
| |
| } // namespace lockdep |
