mirror of
https://github.com/triqs/dft_tools
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75 lines
3.0 KiB
C++
75 lines
3.0 KiB
C++
/*******************************************************************************
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*
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* TRIQS: a Toolbox for Research in Interacting Quantum Systems
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*
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* Copyright (C) 2011 by O. Parcollet
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*
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* TRIQS is free software: you can redistribute it and/or modify it under the
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* terms of the GNU General Public License as published by the Free Software
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* Foundation, either version 3 of the License, or (at your option) any later
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* version.
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*
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* TRIQS is distributed in the hope that it will be useful, but WITHOUT ANY
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* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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* details.
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*
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* You should have received a copy of the GNU General Public License along with
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* TRIQS. If not, see <http://www.gnu.org/licenses/>.
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*
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******************************************************************************/
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#ifndef TRIQS_ARRAYS_MAPPED_FNT_H
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#define TRIQS_ARRAYS_MAPPED_FNT_H
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#include "./functional/map.hpp"
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#include <boost/preprocessor/seq/for_each.hpp>
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namespace triqs { namespace arrays {
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//C++14 will simply be ...
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//template <typename A> decltype(auto) abs(A && a) { return map( [](auto const &x) { using std::abs; return abs(a);}, std::forward<A>(a));}
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using std::pow;
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template<typename T> TYPE_ENABLE_IF(T, std::is_integral<T>) pow(T x, int n) { return (n==0 ? 1 : pow(x,n-1)*x);}
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struct pow_wrap {
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int n;
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template<typename A> A operator()( A const & a) const { return pow(a,n);}
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};
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template <typename A>
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typename boost::lazy_enable_if_c<!ImmutableMatrix<A>::value,std::result_of<map_impl<pow_wrap,1>(A)>>::type
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pow(A && a, int n) { return map(pow_wrap{n})(std::forward<A>(a)); }
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#define MAP_IT(FNT) \
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using std::FNT;\
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struct __triqs_##FNT##_wrap { template<typename A> auto operator()(A const & a) const DECL_AND_RETURN(FNT(a)); };\
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template <typename A> \
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typename boost::lazy_enable_if_c<ImmutableCuboidArray<A>::value,std::result_of<map_impl<__triqs_##FNT##_wrap,1>(A)>>::type\
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FNT(A && a) { return map(__triqs_##FNT##_wrap{})(std::forward<A>(a)); }
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#define TRIQS_ARRAYS_MATH_FNT (abs)(real)(imag)(floor)
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#define AUX(r, data, elem) MAP_IT(elem)
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BOOST_PP_SEQ_FOR_EACH(AUX , nil , TRIQS_ARRAYS_MATH_FNT);
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#undef AUX
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#undef MAP_IT
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#undef TRIQS_ARRAYS_MATH_FNT
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// Functions only defined for vector, array but NOT for matrix. They act element wise.
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#define MAP_IT(FNT) \
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using std::FNT;\
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struct __triqs_##FNT##_wrap { template<typename A> auto operator()(A const & a) const DECL_AND_RETURN(FNT(a)); };\
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template <typename A> \
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typename boost::lazy_enable_if_c<ImmutableArray<A>::value||ImmutableVector<A>::value,std::result_of<map_impl<__triqs_##FNT##_wrap,1>(A)>>::type\
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FNT(A && a) { return map(__triqs_##FNT##_wrap{})(std::forward<A>(a)); }
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#define TRIQS_ARRAYS_MATH_FNT (exp)(cos)(sin)(tan)(cosh)(sinh)(tanh)(acos)(asin)(atan)(log)(sqrt)
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#define AUX(r, data, elem) MAP_IT(elem)
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BOOST_PP_SEQ_FOR_EACH(AUX , nil , TRIQS_ARRAYS_MATH_FNT);
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#undef AUX
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#undef MAP_IT
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#undef TRIQS_ARRAYS_MATH_FNT
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}}//namespace triqs::arrays
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#endif
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