mirror of
https://github.com/triqs/dft_tools
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74 lines
2.9 KiB
C++
74 lines
2.9 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) 2013 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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#include <triqs/arrays.hpp>
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#include <iostream>
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namespace triqs { namespace arrays {
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/* template <typename V, int R, ull_t Opt, ull_t To, typename ... I>
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array_view<V, sizeof...(I), Opt> reinterpret_array_view (array<V,R,Opt,To> const & a, I ... index) {
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//static int constexpr rank = sizeof...(I);
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typedef array_view<V, sizeof...(I), Opt, indexmaps::mem_layout::c_order(rank)> return_t;
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//typedef array_view<V, rank, Opt, indexmaps::mem_layout::c_order(rank)> return_t;
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return return_t { make_shape(index...), a.storage() };
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//return return_t (typename return_t::indexmap_type (mini_vector<size_t,rank>(index...)) , a.storage());
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}
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*/
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template <typename V, int R, ull_t Opt, ull_t To, typename ... I>
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array_view<V, sizeof...(I), Opt> reinterpret (array<V,R,Opt,To> const & a, I ... index) {
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return { {make_shape(index...)}, a.storage() };
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}
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// wrong for views
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template <typename V, int R, ull_t Opt, ull_t To, bool B, typename ... I>
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array_view<V, sizeof...(I), Opt,indexmaps::mem_layout::c_order(sizeof...(I))> reinterpret_array_view (array_view<V,R,Opt,To,B> const & a, I ... index) {
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if (!has_contiguous_data(a)) TRIQS_RUNTIME_ERROR << "reinterpretation failure : data of the view are not contiguous";
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return { {make_shape(index...)}, a.storage() };
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}
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/*
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template <typename V, int R, ull_t Opt, ull_t To, typename ... I>
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array_view<V, sizeof...(I), Opt,indexmaps::mem_layout::c_order(sizeof...(I))> reinterpret_array_view_c (matrix<V,Opt,To> const & a, I ... index) {
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return { {make_shape(index...)}, a.storage() };
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}
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template <typename V, int R, ull_t Opt, ull_t To, typename ... I>
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array_view<V, sizeof...(I), Opt,indexmaps::mem_layout::c_order(sizeof...(I))> reinterpret_array_view_c (vector<V,Opt> const & a, I ... index) {
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return { {make_shape(index...)}, a.storage() };
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}
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*/
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}}
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using namespace triqs::arrays;
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int main(int argc, char **argv) {
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triqs::arrays::array<long,1> A = {1,2,3,4,5,6};
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std::cout << reinterpret(A, 2,3)<< std::endl;
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//std::cout << reinterpret_array_view(A(range(1,5)), 2,3)<< std::endl;
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return 0;
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}
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