mirror of
https://github.com/triqs/dft_tools
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64 lines
2.6 KiB
C++
64 lines
2.6 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) 2013-2014 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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#pragma once
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#include "../tools.hpp"
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#include "../gf.hpp"
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#include "./tail.hpp"
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namespace triqs {
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namespace gfs {
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struct no_tail {};
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template <typename Variable, typename Target, bool V, bool C>
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gf_view<Variable, Target, no_tail, C> make_gf_view_without_tail(gf_impl<Variable, Target, void, V, C> const &g) {
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return {g.mesh(), g.data(), {}, g.symmetry(), g.indices(), g.name};
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}
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namespace details { // dispatch the test for scalar_valued and matrix_valued
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using arrays::mini_vector;
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inline void _equal_or_throw(mini_vector<size_t, 2> const &s_t, mini_vector<size_t, 2> const &g_t) {
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if (s_t != g_t) TRIQS_RUNTIME_ERROR << "make_gf_from_g_and_tail: Shape of the gf target and of the tail mismatch";
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}
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inline void _equal_or_throw(mini_vector<size_t, 2> const &s_t, mini_vector<size_t, 0> const &g_t) {
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if (s_t != mini_vector<size_t, 2>{1, 1})
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TRIQS_RUNTIME_ERROR << "make_gf_from_g_and_tail: tail shape must be 1x1 for a scalar gf";
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}
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}
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template <typename Variable, typename Target, bool V, bool C>
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gf_view<Variable, Target> make_gf_from_g_and_tail(gf_impl<Variable, Target, no_tail, V, C> const &g, local::tail t) {
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details::_equal_or_throw(t.shape(), get_target_shape(g));
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auto g2 = gf<Variable, Target, no_tail>{g}; // copy the function without tail
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return {std::move(g2.mesh()), std::move(g2.data()), std::move(t), g2.symmetry()};
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}
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template <typename Variable, typename Target, bool V, bool C>
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gf_view<Variable, Target, void, C> make_gf_view_from_g_and_tail(gf_impl<Variable, Target, no_tail, V, C> const &g,
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local::tail_view t) {
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details::_equal_or_throw(t.shape(), get_target_shape(g));
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return {g.mesh(), g.data(), t, g.symmetry()};
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}
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}
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}
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