00001 // Copyright (C) 2007, 2008, 2009 EPITA Research and Development Laboratory (LRDE) 00002 // 00003 // This file is part of Olena. 00004 // 00005 // Olena is free software: you can redistribute it and/or modify it under 00006 // the terms of the GNU General Public License as published by the Free 00007 // Software Foundation, version 2 of the License. 00008 // 00009 // Olena is distributed in the hope that it will be useful, 00010 // but WITHOUT ANY WARRANTY; without even the implied warranty of 00011 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00012 // General Public License for more details. 00013 // 00014 // You should have received a copy of the GNU General Public License 00015 // along with Olena. If not, see <http://www.gnu.org/licenses/>. 00016 // 00017 // As a special exception, you may use this file as part of a free 00018 // software project without restriction. Specifically, if other files 00019 // instantiate templates or use macros or inline functions from this 00020 // file, or you compile this file and link it with other files to produce 00021 // an executable, this file does not by itself cause the resulting 00022 // executable to be covered by the GNU General Public License. This 00023 // exception does not however invalidate any other reasons why the 00024 // executable file might be covered by the GNU General Public License. 00025 00026 #ifndef MLN_VALUE_CAST_HH 00027 # define MLN_VALUE_CAST_HH 00028 00034 # include <mln/core/concept/value.hh> 00035 # include <mln/value/equiv.hh> 00036 00037 00038 namespace mln 00039 { 00040 00041 namespace value 00042 { 00043 00044 00046 template <typename Dest, typename Src> 00047 Dest cast(const Src& src); 00048 00049 00050 00051 # ifndef MLN_INCLUDE_ONLY 00052 00053 namespace internal 00054 { 00055 00056 template <typename S> 00057 inline 00058 const S& 00059 cast_(const void*, const S& src) 00060 { 00061 return src; 00062 } 00063 00064 template <typename O, typename S> 00065 inline 00066 const S& 00067 cast_(const Object<O>*, const S& src) 00068 { 00069 return src; 00070 } 00071 00072 template <typename V, typename S> 00073 inline 00074 mln_value_equiv(S) 00075 cast_(const Value<V>*, const S& src) 00076 { 00077 return mln::value::equiv(src); 00078 } 00079 00080 } // end of namespace mln::value::internal 00081 00082 00083 template <typename Dest, typename Src> 00084 inline 00085 Dest cast(const Src& src) 00086 { 00087 // FIXME: Add static_cast<Dest>? 00088 // FIXME: Add exact()? 00089 return static_cast<Dest>(internal::cast_(&src, src)); 00090 } 00091 00092 # endif // ! MLN_INCLUDE_ONLY 00093 00094 } // end of namespace mln::value 00095 00096 } // end of namespace mln 00097 00098 00099 #endif // ! MLN_VALUE_CAST_HH
1.7.1