matrix_fold.hpp
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1/*!
2 * \brief Kernels for folding matrix expressions
3 *
4 * \author O. Krause
5 * \date 2016
6 *
7 *
8 * \par Copyright 1995-2015 Shark Development Team
9 *
10 * <BR><HR>
11 * This file is part of Shark.
12 * <http://image.diku.dk/shark/>
13 *
14 * Shark is free software: you can redistribute it and/or modify
15 * it under the terms of the GNU Lesser General Public License as published
16 * by the Free Software Foundation, either version 3 of the License, or
17 * (at your option) any later version.
18 *
19 * Shark is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU Lesser General Public License for more details.
23 *
24 * You should have received a copy of the GNU Lesser General Public License
25 * along with Shark. If not, see <http://www.gnu.org/licenses/>.
26 *
27 */
28#ifndef REMORA_KERNELS_DEFAULT_MATRIX_FOLD_HPP
29#define REMORA_KERNELS_DEFAULT_MATRIX_FOLD_HPP
30
31#include "../../detail/traits.hpp" //orientations
32#include "../../expression_types.hpp"
33#include <type_traits>
34namespace remora{namespace bindings{
35
36template<class F, class M, class Orientation, class Tag>
37void matrix_fold(matrix_expression<M, cpu_tag> const& m, typename F::result_type& value, Orientation, Tag) {
38 F f;
39 for(std::size_t i = 0; i != major_size(m); ++i){
40 auto end = m().major_end(i);
41 for(auto pos = m().major_begin(i);pos != end; ++pos){
42 value = f(value,*pos);
43 }
44 }
45}
46
47}}
48#endif