CompileTimeError.h

00001 /*
00002  * Tiny Vector Matrix Library
00003  * Dense Vector Matrix Libary of Tiny size using Expression Templates
00004  *
00005  * Copyright (C) 2001 - 2007 Olaf Petzold <opetzold@users.sourceforge.net>
00006  *
00007  * This library is free software; you can redistribute it and/or
00008  * modify it under the terms of the GNU Lesser General Public
00009  * License as published by the Free Software Foundation; either
00010  * version 2.1 of the License, or (at your option) any later version.
00011  *
00012  * This library is distributed in the hope that it will be useful,
00013  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00014  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00015  * Lesser General Public License for more details.
00016  *
00017  * You should have received a copy of the GNU Lesser General Public
00018  * License along with this library; if not, write to the Free Software
00019  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
00020  *
00021  * $Id: CompileTimeError.h,v 1.11 2007-06-23 15:58:58 opetzold Exp $
00022  */
00023 
00024 #ifndef TVMET_COMPILE_TIME_ERROR_H
00025 #define TVMET_COMPILE_TIME_ERROR_H
00026 
00027 namespace tvmet {
00028 
00029 /**
00030  * \class CompileTimeError CompileTimeError.h "tvmet/CompileTimeError.h"
00031  * \brief Compile Time Assertation classes.
00032  */
00033 template<bool> struct CompileTimeError;
00034 
00035 /**
00036  * \class CompileTimeError<true> CompileTimeError.h "tvmet/CompileTimeError.h"
00037  * \brief Specialized Compile Time Assertation for successfully condition.
00038  * This results in a compiler pass.
00039  */
00040 template<> struct CompileTimeError<true> { };
00041 
00042 
00043 /**
00044  * \def TVMET_CT_CONDITION(XPR, MSG)
00045  * \brief Simplify the Compile Time Assertation by using an expression
00046  * Xpr and an error message MSG.
00047  */
00048 #define TVMET_CT_CONDITION(XPR, MSG) {              \
00049   CompileTimeError<(XPR)> tvmet_ERROR_##MSG;            \
00050   (void)tvmet_ERROR_##MSG;                  \
00051 }
00052 
00053 } // namespace tvmet
00054 
00055 #endif // TVMET_COMPILE_TIME_ERROR_H
00056 
00057 // Local Variables:
00058 // mode:C++
00059 // tab-width:8
00060 // End: