mirror of
https://github.com/triqs/dft_tools
synced 2024-12-28 15:15:52 +01:00
75 lines
2.7 KiB
C++
75 lines
2.7 KiB
C++
/*******************************************************************************
|
|
*
|
|
* TRIQS: a Toolbox for Research in Interacting Quantum Systems
|
|
*
|
|
* Copyright (C) 2013 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_GF_EVALUATOR_H
|
|
#define TRIQS_GF_EVALUATOR_H
|
|
#include "./tools.hpp"
|
|
#include "./gf.hpp"
|
|
|
|
namespace triqs { namespace gfs {
|
|
namespace gfs_implementation {
|
|
|
|
// simple evaluation : take the point on the grid...
|
|
struct evaluator_grid_simple {
|
|
long n;
|
|
evaluator_grid_simple() = default;
|
|
|
|
template<typename MeshType, typename PointType>
|
|
evaluator_grid_simple (MeshType const & m, PointType const & p) { n=p; }
|
|
template<typename F> auto operator()(F const & f) const DECL_AND_RETURN(f (n));
|
|
};
|
|
|
|
// a linear interpolation
|
|
struct evaluator_grid_linear_interpolation {
|
|
double w1, w2; size_t n1, n2;
|
|
|
|
evaluator_grid_linear_interpolation() = default;
|
|
|
|
template<typename MeshType, typename PointType>
|
|
evaluator_grid_linear_interpolation (MeshType const & m, PointType const & p, double prefactor=1) {
|
|
bool in; double w;
|
|
std::tie(in, n1, w) = windowing(m,p);
|
|
if (!in) TRIQS_RUNTIME_ERROR <<" Evaluation out of bounds";
|
|
w1 = prefactor * (1-w); w2 = prefactor * w; n2 = n1 +1;
|
|
}
|
|
|
|
template<typename F> auto operator()(F const & f) const DECL_AND_RETURN(w1 * f(n1) + w2 * f (n2));
|
|
};
|
|
|
|
// the evaluator for various types.
|
|
template<typename MeshType> struct evaluator_fnt_on_mesh;
|
|
|
|
// can not use inherited constructors, too recent...
|
|
#define TRIQS_INHERIT_AND_FORWARD_CONSTRUCTOR(NEWCLASS,CLASS) : CLASS { template<typename ...T> NEWCLASS(T &&... t) : CLASS(std::forward<T>(t)...){};};
|
|
|
|
//
|
|
template<typename Variable>
|
|
struct evaluator_one_var {
|
|
public :
|
|
static constexpr int arity = 1;
|
|
evaluator_one_var() = default;
|
|
template<typename G> auto operator()(G const * g, double x) const DECL_AND_RETURN(evaluator_fnt_on_mesh<Variable> (g->mesh(),x)(on_mesh(*g)));
|
|
template<typename G> typename G::singularity_t const & operator()(G const * g,freq_infty const &) const {return g->singularity();}
|
|
};
|
|
|
|
}
|
|
}}
|
|
#endif
|