mirror of
https://github.com/triqs/dft_tools
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106 lines
4.3 KiB
C++
106 lines
4.3 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 by M. Ferrero, 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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#ifndef TRIQS_GF_TOOLS_H
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#define TRIQS_GF_TOOLS_H
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#include <triqs/utility/first_include.hpp>
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#include <utility>
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#include <boost/iterator/iterator_facade.hpp>
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#include <triqs/clef.hpp>
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#include <triqs/arrays/array.hpp>
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#include <triqs/arrays/matrix.hpp>
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#include <triqs/arrays/h5/simple_read_write.hpp>
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#include "triqs/utility/complex_ops.hpp"
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#include <triqs/utility/view_tools.hpp>
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#include <triqs/utility/expression_template_tools.hpp>
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#include <triqs/h5.hpp>
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namespace triqs { namespace gf {
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namespace tqa= triqs::arrays;
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namespace mpl=boost::mpl;
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namespace tag { struct composite{}; struct mesh_point{};}
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struct matrix_valued {};
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struct scalar_valued {};
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//------------------------------------------------------
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typedef std::complex<double> dcomplex;
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enum statistic_enum {Boson,Fermion};
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struct freq_infty{}; // the point at infinity
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inline std::vector<std::string> split(const std::string &s, char delim){
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std::vector<std::string> elems;
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std::stringstream ss(s);
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std::string item;
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while(std::getline(ss, item, delim)) { elems.push_back(item); }
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return elems;
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}
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//------------------------------------------------------
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template<typename ... T> struct closest_pt_wrap;
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template<typename T> struct closest_pt_wrap<T> : tag::mesh_point { T value; template<typename U> explicit closest_pt_wrap(U&&x): value(std::forward<U>(x)){} };
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template<typename T1, typename T2, typename ...Ts > struct closest_pt_wrap<T1,T2,Ts...> : tag::mesh_point {
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std::tuple<T1,T2,Ts...> value_tuple;
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template<typename ... U> explicit closest_pt_wrap(U&& ... x): value_tuple (std::forward<U>(x) ... ){}
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};
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template<typename ... T> closest_pt_wrap<T...> closest_mesh_pt(T && ... x) { return closest_pt_wrap<T...> (std::forward<T>(x)...);}
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//------------------------------------------------------
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struct nothing {
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template<typename... Args> explicit nothing(Args...) {} // takes anything, do nothing..
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nothing() {}
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typedef void has_view_type_tag; // Idiom : ValueView
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typedef nothing view_type;
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typedef nothing non_view_type;
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void rebind (nothing){}
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template< typename RHS> void operator=(RHS && ) {}
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friend void h5_write (h5::group, std::string subgroup_name, nothing ) {}
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friend void h5_read (h5::group, std::string subgroup_name, nothing ) {}
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// BOOST Serialization
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friend class boost::serialization::access;
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template<class Archive>
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void serialize(Archive & ar, const unsigned int version) {
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}
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friend nothing operator +( nothing, nothing) { return nothing();}
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template<typename RHS> friend void assign_from_expression(nothing & ,RHS) {}
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};
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template<typename T> nothing operator+(nothing, T const &) { return nothing();}
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template<typename T> nothing operator-(nothing, T const &) { return nothing();}
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template<typename T> nothing operator*(nothing, T const &) { return nothing();}
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template<typename T> nothing operator/(nothing, T const &) { return nothing();}
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template<typename T> TYPE_DISABLE_IF(nothing, std::is_same<T,nothing>) operator+(T const &, nothing) { return nothing();}
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template<typename T> TYPE_DISABLE_IF(nothing, std::is_same<T,nothing>) operator-(T const &, nothing) { return nothing();}
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template<typename T> TYPE_DISABLE_IF(nothing, std::is_same<T,nothing>) operator*(T const &, nothing) { return nothing();}
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template<typename T> TYPE_DISABLE_IF(nothing, std::is_same<T,nothing>) operator/(T const &, nothing) { return nothing();}
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//------------------------------------------------------
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}}
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#endif
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