Milena (Olena)
User documentation 2.0a Id
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00001 // Copyright (C) 2007, 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_OTHER_HH 00027 # define MLN_VALUE_OTHER_HH 00028 00034 # include <mln/core/concept/value.hh> 00035 # include <mln/value/set.hh> 00036 # include <mln/value/concept/all.hh> 00037 00038 00039 namespace mln 00040 { 00041 00042 namespace value 00043 { 00044 00045 00047 template <typename V> 00048 V other(const V& val); 00049 00050 00051 00052 # ifndef MLN_INCLUDE_ONLY 00053 00054 namespace internal 00055 { 00056 00057 template <typename V> 00058 V 00059 other_(const void*, const V& val) // Surely a builtin. 00060 { 00061 return val + 1; 00062 } 00063 00064 inline 00065 bool 00066 other_(const void*, const bool& val) 00067 { 00068 return ! val; 00069 } 00070 00071 00072 template <typename V> 00073 inline 00074 V 00075 other_(mln::trait::value::quant::high, const Value<V>& val_) 00076 { 00077 const V& val = exact(val_); 00078 return val.other(); 00079 } 00080 00081 template <typename V> 00082 inline 00083 V 00084 other_(mln::trait::value::quant::high, const value::Scalar<V>& val_) 00085 { 00086 const V& val = exact(val_); 00087 return (mln_max(V) - val) + mln_min(V); 00088 } 00089 00090 template <typename V> 00091 inline 00092 V 00093 other_(mln::trait::value::quant::low, const Value<V>& val_) 00094 { 00095 const V& val = exact(val_); 00096 value::set<V> s; 00097 unsigned i = s.index_of(val); 00098 mln_assertion(s.nvalues() >= 2); 00099 return i == 0 ? s[1] : s[0]; 00100 } 00101 00102 template <typename V> 00103 inline 00104 V 00105 other_(const Value<V>*, const V& val) 00106 { 00107 return other_(mln_trait_value_quant(V)(), val); 00108 } 00109 00110 } // end of namespace mln::value::internal 00111 00112 00113 template <typename V> 00114 inline 00115 V other(const V& val) 00116 { 00117 V tmp = internal::other_(&val, val); 00118 mln_postcondition(tmp != val); 00119 return tmp; 00120 } 00121 00122 # endif // ! MLN_INCLUDE_ONLY 00123 00124 } // end of namespace mln::value 00125 00126 } // end of namespace mln 00127 00128 00129 #endif // ! MLN_VALUE_OTHER_HH