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PTS.h

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00001 /* SimData: Data Infrastructure for Simulations
00002  * Copyright (C) 2002 Mark Rose <tm2@stm.lbl.gov>
00003  * 
00004  * This file is part of SimData.
00005  * 
00006  * This program is free software; you can redistribute it and/or
00007  * modify it under the terms of the GNU General Public License
00008  * as published by the Free Software Foundation; either version 2
00009  * of the License, or (at your option) any later version.
00010  * 
00011  * This program is distributed in the hope that it will be useful,
00012  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00013  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00014  * GNU General Public License for more details.
00015  * 
00016  * You should have received a copy of the GNU General Public License
00017  * along with this program; if not, write to the Free Software
00018  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
00019  */
00020 
00021 
00031 #ifndef __SIMDATA_PTS_H__
00032 #define __SIMDATA_PTS_H__
00033 
00034 #include <SimData/Namespace.h>
00035 
00036 
00037 // is partial template specialization supported?
00038 #if defined(_MSC_VER) && (_MSC_VER <= 1300)
00039         #define __SIMDATA_PTS_SIM
00040 #endif
00041 
00042 
00043 NAMESPACE_SIMDATA
00044 
00045 
00048 namespace meta {
00049 
00050 struct SelectThen
00051 {       template<class Then, class Else>
00052         struct Result { typedef Then RET; };
00053 };
00054 
00055 struct SelectElse
00056 {       template<class Then, class Else>
00057         struct Result { typedef Else RET; };
00058 };
00059 
00060 template<bool Condition>
00061 struct Selector { typedef SelectThen RET; };
00062 
00063 template<>
00064 struct Selector<false> { typedef SelectElse RET; };
00065 
00066 template<bool Condition, class Then, class Else>
00067 struct IF
00068 {       typedef typename Selector<Condition>::RET select;
00069         typedef typename select::Result<Then,Else>::RET RET;
00070 };
00071 
00072 } // meta
00073 
00074 
00075 NAMESPACE_SIMDATA_END
00076 
00077 #endif // __SIMDATA_PTS_H__
00078 
00079 

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