mirror of
https://github.com/triqs/dft_tools
synced 2024-10-31 19:23:45 +01:00
62 lines
2.3 KiB
C++
62 lines
2.3 KiB
C++
/*******************************************************************************
|
|
*
|
|
* TRIQS: a Toolbox for Research in Interacting Quantum Systems
|
|
*
|
|
* Copyright (C) 2011 by O. Parcollet
|
|
*
|
|
* TRIQS is free software: you can redistribute it and/or modify it under the
|
|
* terms of the GNU General Public License as published by the Free Software
|
|
* Foundation, either version 3 of the License, or (at your option) any later
|
|
* version.
|
|
*
|
|
* TRIQS is distributed in the hope that it will be useful, but WITHOUT ANY
|
|
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
|
|
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
|
|
* details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along with
|
|
* TRIQS. If not, see <http://www.gnu.org/licenses/>.
|
|
*
|
|
******************************************************************************/
|
|
#ifndef TRIQS_ARRAYS_ALGORITHMS_H
|
|
#define TRIQS_ARRAYS_ALGORITHMS_H
|
|
#include<triqs/utility/first_include.hpp>
|
|
#include <algorithm>
|
|
#include <functional>
|
|
#include "./functional/fold.hpp"
|
|
#include <boost/preprocessor/repetition/repeat_from_to.hpp>
|
|
|
|
namespace triqs { namespace arrays {
|
|
|
|
// get_first_element(a) returns .. the first element, i.e. a(0,0,0...)
|
|
#define ZERO(z, n, text) 0
|
|
#define IMPL(z, N, unused)\
|
|
template<typename ArrayType> typename std::enable_if<ArrayType::domain_type::rank==N,typename ArrayType::value_type>::type get_first_element(ArrayType const & A) \
|
|
{ return A(BOOST_PP_ENUM(N,ZERO,0));}
|
|
BOOST_PP_REPEAT_FROM_TO(1,ARRAY_NRANK_MAX , IMPL, nil);
|
|
#undef IMPL
|
|
#undef ZERO
|
|
|
|
template<class A>
|
|
typename A::value_type max_element(A const &a) {
|
|
typedef typename A::value_type T;
|
|
return fold ([](T const & a, T const & b) { return std::max(a,b);} ) (a, get_first_element(a));
|
|
}
|
|
|
|
template<class A>
|
|
typename A::value_type min_element(A const &a) {
|
|
typedef typename A::value_type T;
|
|
return fold ([](T const & a, T const & b) { return std::min(a,b);} ) (a, get_first_element(a));
|
|
}
|
|
|
|
template <class A>
|
|
typename A::value_type sum(A const & a) { return fold ( std::plus<typename A::value_type>()) (a); }
|
|
|
|
template <class A>
|
|
typename A::value_type prod(A const & a) { return fold ( std::multiplies<typename A::value_type>()) (a,1); }
|
|
|
|
}}//namespace triqs::arrays
|
|
#endif
|
|
|
|
|