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.
4 
5 #ifndef PDFIUM_THIRD_PARTY_BASE_TEMPLATE_UTIL_H_
6 #define PDFIUM_THIRD_PARTY_BASE_TEMPLATE_UTIL_H_
7 
8 #include <cstddef>  // For size_t.
9 
10 namespace pdfium {
11 namespace base {
12 
13 template<class T, T v>
14 struct integral_constant {
15   static const T value = v;
16   typedef T value_type;
17   typedef integral_constant<T, v> type;
18 };
19 
20 typedef integral_constant<bool, true> true_type;
21 typedef integral_constant<bool, false> false_type;
22 
23 template <class T, class U> struct is_same : public false_type {};
24 template <class T> struct is_same<T,T> : true_type {};
25 
26 template<bool B, class T = void>
27 struct enable_if {};
28 
29 template<class T>
30 struct enable_if<true, T> { typedef T type; };
31 
32 }  // namespace base
33 }  // namespace pdfium
34 
35 #endif  // PDFIUM_THIRD_PARTY_BASE_TEMPLATE_UTIL_H_
36