mirror of
https://github.com/triqs/dft_tools
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79 lines
2.9 KiB
C++
79 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) 2012-2013 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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#pragma once
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#include "./tools.hpp"
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#include "./gf.hpp"
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#include "./local/tail.hpp"
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#include "./domains/R.hpp"
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#include "../lattice/bz_mesh.hpp"
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#include "./evaluators.hpp"
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namespace triqs {
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namespace gfs {
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struct bz {};
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template <typename Opt> struct gf_mesh<bz, Opt> : lattice::bz_mesh {
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template <typename... T> gf_mesh(T &&... x) : lattice::bz_mesh(std::forward<T>(x)...) {}
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};
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namespace gfs_implementation {
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// h5 name
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template <typename Opt> struct h5_name<bz, matrix_valued, Opt> {
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static std::string invoke() { return "BZ"; }
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};
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/// --------------------------- data access ---------------------------------
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template <typename Opt> struct data_proxy<bz, matrix_valued, Opt> : data_proxy_array<std::complex<double>, 3> {};
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template <typename Opt> struct data_proxy<bz, scalar_valued, Opt> : data_proxy_array<std::complex<double>, 1> {};
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/// --------------------------- evaluator ---------------------------------
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// simple evaluation : take the point on the grid...
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template <> struct evaluator_fnt_on_mesh<bz> {
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size_t n;
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evaluator_fnt_on_mesh() = default;
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template <typename MeshType> evaluator_fnt_on_mesh(MeshType const &m, lattice::k_t const &k) {
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n = m.locate_neighbours(k); // TO BE IMPROVED
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}
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template <typename F> auto operator()(F const &f) const DECL_AND_RETURN(f(n));
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//template <typename F> decltype(auto) operator()(F const &f) const { return f(n); }
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};
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// ------------- evaluator -------------------
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// handle the case where the matsu. freq is out of grid...
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template <typename Target, typename Opt> struct evaluator<bz, Target, Opt> {
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static constexpr int arity = 1;
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template <typename G>
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std::c14::conditional_t<std::is_same<Target, matrix_valued>::value, arrays::matrix_const_view<std::complex<double>>,
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std::complex<double>>
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operator()(G const *g, lattice::k_t const &k) const {
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auto n = g->mesh().locate_neighbours(k); // TO BE IMPROVED
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return (*g)[n];
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}
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};
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}
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}
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}
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