1 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
5 #ifndef BASE_TEMPLATE_UTIL_H_
6 #define BASE_TEMPLATE_UTIL_H_
8 #include <cstddef> // For size_t.
12 template<class T, T v>
13 struct integral_constant {
14 static const T value = v;
16 typedef integral_constant<T, v> type;
19 typedef integral_constant<bool, true> true_type;
20 typedef integral_constant<bool, false> false_type;
22 template <class T, class U> struct is_same : public false_type {};
23 template <class T> struct is_same<T,T> : true_type {};
25 template<bool B, class T = void>
29 struct enable_if<true, T> { typedef T type; };
33 #endif // BASE_TEMPLATE_UTIL_H_