spot  0.9.1
casts.hh
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00001 // Copyright (C) 2011 Laboratoire de Recherche et Développement
00002 // de l'Epita (LRDE).
00003 //
00004 // This file is part of Spot, a model checking library.
00005 //
00006 // Spot is free software; you can redistribute it and/or modify it
00007 // under the terms of the GNU General Public License as published by
00008 // the Free Software Foundation; either version 2 of the License, or
00009 // (at your option) any later version.
00010 //
00011 // Spot is distributed in the hope that it will be useful, but WITHOUT
00012 // ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
00013 // or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
00014 // License for more details.
00015 //
00016 // You should have received a copy of the GNU General Public License
00017 // along with Spot; see the file COPYING.  If not, write to the Free
00018 // Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
00019 // 02111-1307, USA.
00020 
00021 #ifndef SPOT_MISC_CASTS_HH
00022 #  define SPOT_MISC_CASTS_HH
00023 
00024 
00025 // We usually write code like
00026 //   subclass* i = down_cast<subclass*>(m);
00027 //   assert(i);
00028 //   ... use i ...
00029 // When NDEBUG is set, the down_cast is a fast static_cast
00030 // and the assert has no effect.
00031 // Otherwise, the down_cast is a dynamic_cast and may return 0
00032 // on error, which the assert catches.
00033 
00034 #if NDEBUG
00035 # define down_cast static_cast
00036 #else
00037 #  define down_cast dynamic_cast
00038 #endif
00039 
00040 #endif // SPOT_MISC_CASTS_HH

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