Milena (Olena)
User documentation 2.0a Id
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00001 // Copyright (C) 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_FUN_I2V_VALUE_AT_INDEX_HH 00027 # define MLN_FUN_I2V_VALUE_AT_INDEX_HH 00028 00032 00033 # include <mln/core/concept/function.hh> 00034 # include <mln/trait/value_.hh> 00035 00036 00037 namespace mln 00038 { 00039 00040 namespace fun 00041 { 00042 00043 namespace i2v 00044 { 00045 00046 template <typename T> 00047 struct value_at_index : Function_v2v< value_at_index<T> >, 00048 private metal::bool_<(mln_dim(T) == 1)>::check_t 00049 { 00050 typedef T result; 00051 T operator()(unsigned i) const; 00052 }; 00053 00054 template <> 00055 struct value_at_index<bool> : Function_v2v< value_at_index<bool> > 00056 { 00057 typedef bool result; 00058 bool operator()(unsigned i) const; 00059 }; 00060 00061 00062 # ifndef MLN_INCLUDE_ONLY 00063 00064 template <typename T> 00065 inline 00066 T 00067 value_at_index<T>::operator()(unsigned i) const 00068 { 00069 return T( int(mln_min(T)) + int(i) ); 00070 } 00071 00072 inline 00073 bool 00074 value_at_index<bool>::operator()(unsigned i) const 00075 { 00076 mln_precondition(i < 2); 00077 return i == 1u ? true : false; 00078 } 00079 00080 # endif // ! MLN_INCLUDE_ONLY 00081 00082 } // end of namespace mln::fun::i2v 00083 00084 } // end of namespace mln::fun 00085 00086 } // end of namespace mln 00087 00088 #endif // ! MLN_FUN_I2V_VALUE_AT_INDEX_HH