Milena (Olena)
User documentation 2.0a Id
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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_ONE_HH 00028 # define MLN_LITERAL_ONE_HH 00029 00033 00034 # include <mln/core/concept/literal.hh> 00035 # include <mln/metal/converts_to.hh> 00036 00037 00038 namespace mln 00039 { 00040 00041 namespace literal 00042 { 00043 00045 struct one_t : public Literal<one_t> 00046 { 00047 // This default constructor is needed for compilation with gcc 00048 // 4.6.0, gcc 4.6.1 and Clang. 00049 one_t(); 00050 00051 // FIXME: Cf. comments in literal/zero.hh. 00052 00053 template <typename T> 00054 operator const T () const; 00055 }; 00056 00057 00059 extern const one_t one; 00060 00061 00062 # ifndef MLN_INCLUDE_ONLY 00063 00064 inline 00065 one_t::one_t() 00066 { 00067 } 00068 00069 template <typename T> 00070 inline 00071 one_t::operator const T () const 00072 { 00073 mlc_converts_to(int, T)::check(); 00074 return 1; 00075 } 00076 00077 # ifndef MLN_WO_GLOBAL_VARS 00078 00079 const one_t one; 00080 00081 # endif // !MLN_WO_GLOBAL_VARS 00082 00083 # endif // ! MLN_INCLUDE_ONLY 00084 00085 } // end of namespace mln::literal 00086 00087 } // end of namespace mln 00088 00089 00090 #endif // ! MLN_LITERAL_ONE_HH