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_FUN_MATH_ABS_HH 00027 # define MLN_FUN_MATH_ABS_HH 00028 00029 # include <mln/fun/unary.hh> 00030 # include <mln/value/concept/scalar.hh> 00031 # include <mln/math/abs.hh> 00032 00033 namespace mln 00034 { 00035 00036 // Absolute value, pure 00037 namespace fun 00038 { 00039 struct abs : unary<abs> {}; 00040 } 00041 00042 namespace trait 00043 { 00044 00045 namespace next 00046 { 00047 00048 template <typename T> 00049 struct set_unary_<mln::fun::abs, mln::value::Scalar, T> 00050 { 00051 typedef set_unary_ ret; 00052 typedef T result; 00053 typedef T argument; 00054 00055 static result read(const argument& x) 00056 { 00057 return math::abs(x); 00058 } 00059 }; 00060 00061 } // end of namespace mln::trait::next 00062 00063 } // end of namespace mln::trait 00064 00065 } // end of namespace mln 00066 00067 #endif /* ! MLN_FUN_MATH_ABS_HH */
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