Claw 1.7.0
conditional.hpp
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00001 /*
00002   CLAW - a C++ Library Absolutely Wonderful
00003 
00004   CLAW is a free library without any particular aim but being useful to 
00005   anyone.
00006 
00007   Copyright (C) 2005-2011 Julien Jorge
00008 
00009   This library is free software; you can redistribute it and/or
00010   modify it under the terms of the GNU Lesser General Public
00011   License as published by the Free Software Foundation; either
00012   version 2.1 of the License, or (at your option) any later version.
00013 
00014   This library is distributed in the hope that it will be useful,
00015   but WITHOUT ANY WARRANTY; without even the implied warranty of
00016   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00017   Lesser General Public License for more details.
00018 
00019   You should have received a copy of the GNU Lesser General Public
00020   License along with this library; if not, write to the Free Software
00021   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
00022 
00023   contact: julien.jorge@gamned.org
00024 */
00030 #ifndef __CLAW_CONDITIONAL_HPP__
00031 #define __CLAW_CONDITIONAL_HPP__
00032 
00033 namespace claw
00034 {
00035   namespace meta
00036   {
00049     template<bool Cond, typename ThenPart, typename ElsePart>
00050     struct if_then_else
00051     {
00052 
00053     }; // struct if_then_else
00054 
00055     template<typename ThenPart, typename ElsePart>
00056     struct if_then_else<true, ThenPart, ElsePart>
00057     {
00058       typedef ThenPart result;
00059     }; // struct if_then_else [true]
00060 
00061     template<typename ThenPart, typename ElsePart>
00062     struct if_then_else<false, ThenPart, ElsePart>
00063     {
00064       typedef ElsePart result;
00065     }; // struct if_then_else [false]
00066 
00067   } // namespace meta
00068 } // namespace claw
00069 
00070 #endif // __CLAW_CONDITIONAL_HPP__