| // Copyright (c) 2011 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef BASE_TEMPLATE_UTIL_H_ |
| #define BASE_TEMPLATE_UTIL_H_ |
| |
| #include <cstddef> // For size_t. |
| #include <type_traits> |
| |
| #include "base/build/build_config.h" |
| |
| namespace base { |
| |
| template <class T> struct is_non_const_reference : std::false_type {}; |
| template <class T> struct is_non_const_reference<T&> : std::true_type {}; |
| template <class T> struct is_non_const_reference<const T&> : std::false_type {}; |
| |
| namespace internal { |
| |
| // Types YesType and NoType are guaranteed such that sizeof(YesType) < |
| // sizeof(NoType). |
| typedef char YesType; |
| |
| struct NoType { |
| YesType dummy[2]; |
| }; |
| |
| } // namespace internal |
| |
| } // namespace base |
| |
| #endif // BASE_TEMPLATE_UTIL_H_ |
