base/template_util.h

   1 // Copyright (c) 2010 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 BASE_TEMPLATE_UTIL_H_
   6 #define BASE_TEMPLATE_UTIL_H_
   7
   8 namespace base {
   9
  10 // template definitions from tr1
  11
  12 template<class T, T v>
  13 struct integral_constant {
  14   static const T value = v;
  15   typedef T value_type;
  16   typedef integral_constant<T, v> type;
  17 };
  18
  19 template <class T, T v> const T integral_constant<T, v>::value;
  20
  21 typedef integral_constant<bool, true> true_type;
  22 typedef integral_constant<bool, false> false_type;
  23
  24 template <class T> struct is_pointer : false_type {};
  25 template <class T> struct is_pointer<T*> : true_type {};
  26
  27 }  // namespace base
  28
  29 #endif