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fun/math/cos.hh
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// Copyright (C) 2007, 2008, 2009 EPITA Research and Development Laboratory (LRDE)
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//
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// This file is part of Olena.
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//
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// Olena is free software: you can redistribute it and/or modify it under
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// the terms of the GNU General Public License as published by the Free
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// Software Foundation, version 2 of the License.
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//
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// Olena is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Olena. If not, see <http://www.gnu.org/licenses/>.
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//
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// As a special exception, you may use this file as part of a free
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// software project without restriction. Specifically, if other files
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// instantiate templates or use macros or inline functions from this
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// file, or you compile this file and link it with other files to produce
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// an executable, this file does not by itself cause the resulting
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// executable to be covered by the GNU General Public License. This
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// exception does not however invalidate any other reasons why the
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// executable file might be covered by the GNU General Public License.
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#ifndef MLN_FUN_MATH_COS_HH
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# define MLN_FUN_MATH_COS_HH
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# include <mln/fun/unary.hh>
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# include <mln/value/builtin/floatings.hh>
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# include <mln/value/builtin/integers.hh>
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# include <mln/math/acos.hh>
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# include <mln/math/cos.hh>
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namespace
mln
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{
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// Cosinus, bijective
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namespace
fun
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{
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struct
cos : unary<cos> {};
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}
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namespace
trait
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{
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namespace
next
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{
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template
<
typename
T>
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struct
set_unary_<mln::fun::cos, mln::value::Floating, T>
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{
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typedef
set_unary_ ret;
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typedef
T result;
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typedef
T argument;
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typedef
T& lvalue;
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static
result read(
const
argument& x)
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{
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return
math::cos(x);
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}
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static
void
write(lvalue l,
const
result& x)
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{
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l = math::acos(x);
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}
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};
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template
<
typename
T>
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struct
set_unary_<mln::fun::cos,
mln::value::Integer
, T>
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{
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typedef
set_unary_ ret;
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typedef
double
result;
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typedef
T argument;
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static
result read(
const
argument& x)
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{
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return
math::cos((result)x);
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}
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};
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}
// end of namespace mln::trait::next
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}
// end of namespace mln
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}
// end of namespace mln
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#endif
/* ! MLN_FUN_MATH_COS_HH */
mln
fun
math
cos.hh
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