00001 // -*- C++ -*- 00002 00003 // Copyright (C) 2005, 2006 Free Software Foundation, Inc. 00004 // 00005 // This file is part of the GNU ISO C++ Library. This library is free 00006 // software; you can redistribute it and/or modify it under the terms 00007 // of the GNU General Public License as published by the Free Software 00008 // Foundation; either version 2, or (at your option) any later 00009 // version. 00010 00011 // This library is distributed in the hope that it will be useful, but 00012 // WITHOUT ANY WARRANTY; without even the implied warranty of 00013 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00014 // General Public License for more details. 00015 00016 // You should have received a copy of the GNU General Public License 00017 // along with this library; see the file COPYING. If not, write to 00018 // the Free Software Foundation, 59 Temple Place - Suite 330, Boston, 00019 // MA 02111-1307, USA. 00020 00021 // As a special exception, you may use this file as part of a free 00022 // software library without restriction. Specifically, if other files 00023 // instantiate templates or use macros or inline functions from this 00024 // file, or you compile this file and link it with other files to 00025 // produce an executable, this file does not by itself cause the 00026 // resulting executable to be covered by the GNU General Public 00027 // License. This exception does not however invalidate any other 00028 // reasons why the executable file might be covered by the GNU General 00029 // Public License. 00030 00031 // Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL. 00032 00033 // Permission to use, copy, modify, sell, and distribute this software 00034 // is hereby granted without fee, provided that the above copyright 00035 // notice appears in all copies, and that both that copyright notice 00036 // and this permission notice appear in supporting documentation. None 00037 // of the above authors, nor IBM Haifa Research Laboratories, make any 00038 // representation about the suitability of this software for any 00039 // purpose. It is provided "as is" without express or implied 00040 // warranty. 00041 00042 /** 00043 * @file type_utils.hpp 00044 * Contains utilities for handnling types. All of these classes are based on 00045 * "Modern C++" by Andrei Alxandrescu. 00046 */ 00047 00048 #ifndef PB_DS_TYPE_UTILS_HPP 00049 #define PB_DS_TYPE_UTILS_HPP 00050 00051 #include <cstddef> 00052 #include <utility> 00053 #include <tr1/type_traits> 00054 #include <ext/type_traits.h> 00055 #include <ext/numeric_traits.h> 00056 00057 namespace pb_ds 00058 { 00059 namespace detail 00060 { 00061 using std::tr1::is_same; 00062 using std::tr1::is_const; 00063 using std::tr1::is_pointer; 00064 using std::tr1::is_reference; 00065 using std::tr1::is_fundamental; 00066 using std::tr1::is_member_object_pointer; 00067 using std::tr1::is_member_pointer; 00068 using std::tr1::is_base_of; 00069 using std::tr1::remove_const; 00070 using std::tr1::remove_reference; 00071 00072 // Need integral_const<bool, true> <-> integral_const<int, 1>, so 00073 // because of this use the following typedefs instead of importing 00074 // std::tr1's. 00075 using std::tr1::integral_constant; 00076 typedef std::tr1::integral_constant<int, 1> true_type; 00077 typedef std::tr1::integral_constant<int, 0> false_type; 00078 00079 using __gnu_cxx::__conditional_type; 00080 using __gnu_cxx::__numeric_traits; 00081 00082 template<typename T> 00083 struct is_const_pointer 00084 { 00085 enum 00086 { 00087 value = is_const<T>::value && is_pointer<T>::value 00088 }; 00089 }; 00090 00091 template<typename T> 00092 struct is_const_reference 00093 { 00094 enum 00095 { 00096 value = is_const<T>::value && is_reference<T>::value 00097 }; 00098 }; 00099 00100 template<typename T> 00101 struct is_simple 00102 { 00103 enum 00104 { 00105 value = is_fundamental<typename remove_const<T>::type>::value 00106 || is_pointer<typename remove_const<T>::type>::value 00107 || is_member_pointer<T>::value 00108 }; 00109 }; 00110 00111 template<typename T> 00112 class is_pair 00113 { 00114 private: 00115 template<typename U> 00116 struct is_pair_imp 00117 { 00118 enum 00119 { 00120 value = 0 00121 }; 00122 }; 00123 00124 template<typename U, typename V> 00125 struct is_pair_imp<std::pair<U,V> > 00126 { 00127 enum 00128 { 00129 value = 1 00130 }; 00131 }; 00132 00133 public: 00134 enum 00135 { 00136 value = is_pair_imp<T>::value 00137 }; 00138 }; 00139 00140 00141 template<bool> 00142 struct static_assert; 00143 00144 template<> 00145 struct static_assert<true> 00146 { }; 00147 00148 template<int> 00149 struct static_assert_dumclass 00150 { 00151 enum 00152 { 00153 v = 1 00154 }; 00155 }; 00156 00157 template<typename Type> 00158 struct type_to_type 00159 { 00160 typedef Type type; 00161 }; 00162 } // namespace detail 00163 } // namespace pb_ds 00164 00165 #endif