| // 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 LIB_CONTAINERS_CPP_TEMPLATE_UTIL_H_ | |
| #define LIB_CONTAINERS_CPP_TEMPLATE_UTIL_H_ | |
| #include <stddef.h> | |
| #include <iosfwd> | |
| #include <iterator> | |
| #include <type_traits> | |
| #include <utility> | |
| #include <vector> | |
| namespace containers { | |
| namespace internal { | |
| // Used to detech whether the given type is an iterator. This is normally used | |
| // with std::enable_if to provide disambiguation for functions that take | |
| // templatzed iterators as input. | |
| template <typename T, typename = void> | |
| struct is_iterator : std::false_type {}; | |
| template <typename T> | |
| struct is_iterator<T, std::void_t<typename std::iterator_traits<T>::iterator_category>> | |
| : std::true_type {}; | |
| } // namespace internal | |
| } // namespace containers | |
| #endif // LIB_CONTAINERS_CPP_TEMPLATE_UTIL_H_ |