static_assert.h

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00001 #ifndef _SIGX_STATIC_ASSERT_HPP_
00002 #define _SIGX_STATIC_ASSERT_HPP_
00003 
00004 /*
00005  * Copyright 2006 Klaus Triendl
00006  *
00007  * This library is free software; you can redistribute it and/or
00008  * modify it under the terms of the GNU Library General Public
00009  * License as published by the Free Software Foundation; either
00010  * version 2 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  * Library General Public License for more details.
00016  *
00017  * You should have received a copy of the GNU Library General Public
00018  * License along with this library; if not, write to the Free 
00019  * Software Foundation, 51 Franklin Street, Fifth Floor, 
00020  * Boston, MA 02110-1301, USA.
00021 */
00022 
00029 namespace sigx
00030 {
00031 
00032 // HP aCC cannot deal with missing names for template value parameters
00033 template<bool B_>
00034 struct static_assert;
00035 
00036 template<> 
00037 struct static_assert<true>
00038 {};
00039 
00040 
00041 // Not used; boost does many workarounds for different compilers to allow
00042 // using a static assertion in namespace, template and class scope
00043 #if 0
00044 // HP aCC cannot deal with missing names for template value parameters
00045 template<int I_> struct static_assert_test
00046 {};
00047 #endif
00048     
00049 
00050 } // namespace sigx
00051 
00052 
00053 #define SIGX_STATIC_ASSERT( expr ) \
00054     sizeof(::sigx::static_assert< (bool)( expr ) >)
00055 
00056 
00057 #endif // end file guard

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