Milena (Olena)  User documentation 2.0a Id
black.hh
00001 // Copyright (C) 2007, 2008, 2009, 2011 EPITA Research and Development
00002 // Laboratory (LRDE)
00003 //
00004 // This file is part of Olena.
00005 //
00006 // Olena is free software: you can redistribute it and/or modify it under
00007 // the terms of the GNU General Public License as published by the Free
00008 // Software Foundation, version 2 of the License.
00009 //
00010 // Olena is distributed in the hope that it will be useful,
00011 // but WITHOUT ANY WARRANTY; without even the implied warranty of
00012 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00013 // General Public License for more details.
00014 //
00015 // You should have received a copy of the GNU General Public License
00016 // along with Olena.  If not, see <http://www.gnu.org/licenses/>.
00017 //
00018 // As a special exception, you may use this file as part of a free
00019 // software project without restriction.  Specifically, if other files
00020 // instantiate templates or use macros or inline functions from this
00021 // file, or you compile this file and link it with other files to produce
00022 // an executable, this file does not by itself cause the resulting
00023 // executable to be covered by the GNU General Public License.  This
00024 // exception does not however invalidate any other reasons why the
00025 // executable file might be covered by the GNU General Public License.
00026 
00027 #ifndef MLN_LITERAL_BLACK_HH
00028 # define MLN_LITERAL_BLACK_HH
00029 
00032 
00033 # include <mln/core/concept/literal.hh>
00034 
00035 
00036 namespace mln
00037 {
00038 
00039   namespace literal
00040   {
00041 
00043     struct black_t : public Literal<black_t>
00044     {
00045       // This default constructor is needed for compilation with gcc
00046       // 4.6.0, gcc 4.6.1 and Clang.
00047       black_t();
00048 
00049 # ifdef MLN_NEW_VALUE_TYPES
00050       operator float()  const;
00051       operator double() const;
00052 # endif // MLN_NEW_VALUE_TYPES
00053     };
00054 
00055 
00057     extern const black_t black;
00058 
00059 
00060 # ifndef MLN_INCLUDE_ONLY
00061 
00062 #  ifndef MLN_WO_GLOBAL_VARS
00063 
00064     const black_t black;
00065 
00066 #  endif
00067 
00068     inline
00069     black_t::black_t()
00070     {
00071     }
00072 
00073 #  ifdef MLN_NEW_VALUE_TYPES
00074     inline
00075     black_t::operator float() const
00076     {
00077       return 0.f;
00078     }
00079 
00080     inline
00081     black_t::operator double() const
00082     {
00083       return 0.;
00084     }
00085 #  endif // MLN_NEW_VALUE_TYPES
00086 
00087 # endif // ! MLN_INCLUDE_ONLY
00088 
00089   } // end of namespace mln::literal
00090 
00091 } // end of namespace mln
00092 
00093 
00094 #endif // ! MLN_LITERAL_BLACK_HH
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