mirror of
https://github.com/triqs/dft_tools
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444 lines
19 KiB
C++
444 lines
19 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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#ifndef TRIQS_UTILITY_TUPLE_TOOLS_H
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#define TRIQS_UTILITY_TUPLE_TOOLS_H
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#include<triqs/utility/macros.hpp>
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#include <tuple>
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#include <sstream>
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namespace triqs { namespace tuple {
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/**
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* t : a tuple
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* x : anything
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* push_back (t,x) -> returns new tuple with x append at the end
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*/
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template<typename T, typename X>
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auto push_back(T && t, X &&x) DECL_AND_RETURN ( std::tuple_cat(std::forward<T>(t),std::make_tuple(std::forward<X>(x))));
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/**
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* t : a tuple
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* x : anything
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* push_front (t,x) -> returns new tuple with x append at the first position
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*/
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template<typename T, typename X>
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auto push_front(T && t, X &&x) DECL_AND_RETURN ( std::tuple_cat(std::make_tuple(std::forward<X>(x)),std::forward<T>(t)));
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/**
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* apply(f, t)
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* f : a callable object
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* t a tuple
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* Returns : f(t[0], t[1], ...)
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* Equivalent to f(*t) in python ....
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*/
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template<int pos> struct apply_impl {
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template<typename F, typename T, typename ... Args>
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auto operator()(F && f, T const & t, Args && ... args)
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DECL_AND_RETURN( apply_impl<pos-1>()(std::forward<F>(f),t, std::get<pos>(t), std::forward<Args>(args)...));
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};
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template<> struct apply_impl<-1> {
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template<typename F, typename T, typename ... Args>
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auto operator()(F && f, T const & t, Args && ... args) DECL_AND_RETURN( std::forward<F>(f)(std::forward<Args>(args)...));
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};
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template<typename F, typename T>
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auto apply (F && f, T const & t) DECL_AND_RETURN( apply_impl<std::tuple_size<T>::value-1>()(std::forward<F>(f),t));
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//template <typename T, typename ReturnType, typename... Args>
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//ReturnType apply( ReturnType(*f)(Args...), T const & t) { return apply([f](Args const & ... args) { return (*f)(args...);} ,t);}
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/**
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* apply_construct<F>(t)
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* F : a class
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* t a tuple
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* Returns : F { t[0], t[1]}
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*/
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template<int pos, typename F, typename T> struct apply_construct_impl {
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template<typename ... Args>
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auto operator()(T const & t, Args && ... args)
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DECL_AND_RETURN( apply_construct_impl<pos-1,F,T>()(t, std::get<pos>(t), std::forward<Args>(args)...));
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};
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template<typename F, typename T> struct apply_construct_impl<-1,F,T> {
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template<typename ... Args>
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auto operator()(T const & t, Args && ... args) DECL_AND_RETURN( F{std::forward<Args>(args)...});
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};
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template<typename F, typename T>
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auto apply_construct (T const & t) DECL_AND_RETURN( apply_construct_impl<std::tuple_size<T>::value-1,F,T>()(t));
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/**
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* for_each(f, t)
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* f: a callable object
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* t: a tuple
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* calls f on all tuple elements: f(x) for all x in t
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*/
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template<int pos> struct for_each_impl {
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template<typename T, typename F>
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void operator()(T const & t, F && f) {
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f(std::get<std::tuple_size<T>::value-1-pos>(t));
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for_each_impl<pos-1>()(t, f);
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}
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};
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template<>
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struct for_each_impl<0> {
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template<typename T, typename F>
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void operator() (T const & t, F && f) { f(std::get<std::tuple_size<T>::value-1>(t)); }
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};
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template<typename T, typename F>
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void for_each(T const & t, F && f) {
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for_each_impl<std::tuple_size<T>::value-1>()(t, f);
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}
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/* for_each_enumerate(f, t)
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* f: a callable object
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* t: a tuple
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* calls f on all tuple elements: f(x,n) for all x in t
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*/
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template<int pos> struct for_each_enumerate_impl {
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template<typename T, typename F>
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void operator()(T const & t, F && f) {
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f(std::get<std::tuple_size<T>::value-1-pos>(t),std::tuple_size<T>::value-1-pos);
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for_each_impl<pos-1>()(t, f);
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}
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};
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template<>
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struct for_each_enumerate_impl<0> {
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template<typename T, typename F>
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void operator() (T const & t, F && f) { f(std::get<std::tuple_size<T>::value-1>(t), std::tuple_size<T>::value-1); }
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};
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template<typename T, typename F>
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void for_each_enumerate(T const & t, F && f) {
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for_each_enumerate_impl<std::tuple_size<T>::value-1>()(t, f);
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}
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/**
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* apply_on_tuple(f, t1,t2)
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* f : a callable object
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* t1, t2 two tuples of the same size
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* Returns : [f(i,j) for i,j in zip(t1,t2)]
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*/
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template<int pos> struct apply_on_tuple_impl {
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template<typename F, typename T1, typename ... Args>
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auto operator()(F && f, T1 && t1, Args && ... args)
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DECL_AND_RETURN( apply_on_tuple_impl<pos-1>()(std::forward<F>(f),std::forward<T1>(t1), f(std::get<pos>(t1)), std::forward<Args>(args)...));
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};
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template<> struct apply_on_tuple_impl<-1> {
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template<typename F, typename T1, typename ... Args>
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auto operator()(F && f, T1 && t1, Args && ... args) DECL_AND_RETURN( std::make_tuple(std::forward<Args>(args)...));
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};
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template<typename F, typename T1>
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auto apply_on_tuple (F && f,T1 && t1) DECL_AND_RETURN( apply_on_tuple_impl<std::tuple_size<typename std::remove_reference<T1>::type>::value-1>()(std::forward<F>(f),std::forward<T1>(t1)));
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/**
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* apply_on_zip(f, t1,t2)
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* f : a callable object
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* t1, t2 two tuples of the same size
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* Returns : [f(i,j) for i,j in zip(t1,t2)]
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*/
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template<int pos> struct apply_on_zip_impl {
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template<typename F, typename T1, typename T2, typename ... Args>
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auto operator()(F && f, T1 && t1, T2 && t2, Args && ... args)
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DECL_AND_RETURN( apply_on_zip_impl<pos-1>()(std::forward<F>(f),std::forward<T1>(t1), std::forward<T2>(t2), f(std::get<pos>(t1),std::get<pos>(t2)), std::forward<Args>(args)...));
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};
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template<> struct apply_on_zip_impl<-1> {
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template<typename F, typename T1, typename T2, typename ... Args>
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auto operator()(F && f, T1 && t1, T2 && t2, Args && ... args) DECL_AND_RETURN( std::make_tuple(std::forward<Args>(args)...));
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};
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template<typename F, typename T1, typename T2>
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auto apply_on_zip (F && f,T1 && t1, T2 && t2) DECL_AND_RETURN( apply_on_zip_impl<std::tuple_size<typename std::remove_const<typename std::remove_reference<T1>::type>::type>::value-1>()(std::forward<F>(f),std::forward<T1>(t1),std::forward<T2>(t2)));
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/**
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* apply_on_zip(f, t1,t2,t3)
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* f : a callable object
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* t1, t2 two tuples of the same size
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* Returns : [f(i,j) for i,j in zip(t1,t2)]
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*/
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template<int pos> struct apply_on_zip3_impl {
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template<typename F, typename T1, typename T2, typename T3, typename ... Args>
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auto operator()(F && f, T1 && t1, T2 && t2, T3 && t3, Args && ... args)
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DECL_AND_RETURN( apply_on_zip3_impl<pos-1>()(std::forward<F>(f),std::forward<T1>(t1), std::forward<T2>(t2), std::forward<T3>(t3),
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f(std::get<pos>(t1),std::get<pos>(t2),std::get<pos>(t3)), std::forward<Args>(args)...));
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};
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template<> struct apply_on_zip3_impl<-1> {
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template<typename F, typename T1, typename T2, typename T3,typename ... Args>
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auto operator()(F && f, T1 && t1, T2 && t2, T3 && t3, Args && ... args) DECL_AND_RETURN( std::make_tuple(std::forward<Args>(args)...));
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};
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template<typename F, typename T1, typename T2, typename T3>
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auto apply_on_zip (F && f,T1 && t1, T2 && t2, T3 && t3) DECL_AND_RETURN( apply_on_zip3_impl<std::tuple_size<typename std::remove_const<typename std::remove_reference<T1>::type>::type>::value-1>()(std::forward<F>(f),std::forward<T1>(t1),std::forward<T2>(t2),std::forward<T3>(t3)));
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/**
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* call_on_zip(f, t1,t2,t3)
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* f : a callable object
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* t1, t2, t3 three tuples of the same size
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* Returns : void
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* Effect : calls f(i,j,k) for all(i,j,k) in zip(t1,t2,t3)]
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*/
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template<int pos> struct call_on_zip3_impl {
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template<typename F, typename T1, typename T2, typename T3>
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void operator()(F && f, T1 && t1, T2 && t2, T3 && t3) {
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f(std::get<pos>(std::forward<T1>(t1)),std::get<pos>(std::forward<T2>(t2)),std::get<pos>(std::forward<T3>(t3)));
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call_on_zip3_impl<pos-1>()(std::forward<F>(f),std::forward<T1>(t1), std::forward<T2>(t2), std::forward<T3>(t3));
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}
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};
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template<> struct call_on_zip3_impl<-1> {
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template<typename F, typename T1, typename T2, typename T3> void operator()(F && f, T1 && t1, T2 && t2, T3 && t3){}
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};
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template<typename F, typename T1, typename T2, typename T3>
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void call_on_zip (F && f,T1 && t1, T2 && t2, T3 && t3) {
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call_on_zip3_impl<std::tuple_size<typename std::remove_reference<T1>::type>::value-1>()(std::forward<F>(f),std::forward<T1>(t1),std::forward<T2>(t2),std::forward<T3>(t3));
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}
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/**
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* fold(f, t1, init)
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* f : a callable object
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* t a tuple
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* Returns : f(x0,f(x1,f(....)) on the tuple
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*/
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template<int N, int pos, typename T> struct fold_impl {
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template<typename F, typename R>
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auto operator()(F && f, T & t, R && r )
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DECL_AND_RETURN( fold_impl<N,pos-1,T>()(std::forward<F>(f),t, f(std::get<N-1-pos>(t), std::forward<R>(r))));
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};
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template<int N, typename T> struct fold_impl<N, -1,T> {
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template<typename F, typename R> R operator()(F && f, T & t, R && r) {return std::forward<R>(r);}
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};
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template<typename F, typename T, typename R>
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auto fold (F && f,T & t, R && r) DECL_AND_RETURN( fold_impl<std::tuple_size<T>::value,std::tuple_size<T>::value-1,T>()(std::forward<F>(f),t,std::forward<R>(r)));
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template<typename F, typename T, typename R>
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auto fold (F && f,T const & t, R && r) DECL_AND_RETURN( fold_impl<std::tuple_size<T>::value,std::tuple_size<T>::value-1,T const>()(std::forward<F>(f),t,std::forward<R>(r)));
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/**
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* fold_on_zip(f, t1, t2, init)
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* f : a callable object
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* t1, t2 two tuples of the same size
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* Returns : f(x0,y0,f(x1,y1,,f(....)) for t1 = (x0,x1 ...) and t2 = (y0,y1...).
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*/
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template<int pos, typename T1, typename T2> struct fold_on_zip_impl {
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template<typename F, typename R>
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auto operator()(F && f, T1 const & t1, T2 const & t2, R && r )
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DECL_AND_RETURN( fold_on_zip_impl<pos-1,T1,T2>()(std::forward<F>(f),t1,t2, f(std::get<pos>(t1), std::get<pos>(t2), std::forward<R>(r))));
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};
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template<typename T1, typename T2> struct fold_on_zip_impl<-1,T1,T2> {
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template<typename F, typename R> R operator()(F && f, T1 const & t1, T2 const & t2, R && r) {return std::forward<R>(r);}
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};
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template<typename F, typename T1, typename T2, typename R>
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auto fold_on_zip (F && f,T1 const & t1, T2 const & t2, R && r) DECL_AND_RETURN( fold_on_zip_impl<std::tuple_size<T1>::value-1,T1,T2>()(std::forward<F>(f),t1,t2,std::forward<R>(r)));
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/**
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* filter<int ... I>(t) :
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* Given a tuple t, and integers, returns the tuple where the elements at initial position I are dropped.
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*/
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// pos = position in the tuple, c : counter tuplesize-1 ->0, I : position to filter
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template<int pos, int c, int ... I> struct filter_impl;
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// default case where pos != the first I : increase pos
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template<int pos, int c, int ... I> struct filter_impl : filter_impl<pos+1, c-1, I...> {};
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// when pos == first I
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template<int pos, int c, int ... I> struct filter_impl<pos, c, pos, I...> {
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template<typename TupleIn, typename TupleOut> auto operator() (TupleIn const & t, TupleOut && out) const
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DECL_AND_RETURN( filter_impl<pos+1,c-1, I...>() ( t, push_back(std::forward<TupleOut>(out),std::get<pos>(t))));
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};
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template<int pos, int ... I> struct filter_impl <pos,-1, I...> {
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template<typename TupleIn, typename TupleOut> TupleOut operator() (TupleIn const & t, TupleOut && out) const {return out;}
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};
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template<int ...I, typename Tu>
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auto filter(Tu const & tu) DECL_AND_RETURN ( filter_impl<0,std::tuple_size<Tu>::value-1, I...>()(tu, std::make_tuple()));
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template<typename Tu,int ...I> struct filter_t_tr : std::result_of< filter_impl<0,std::tuple_size<Tu>::value-1, I...>( Tu, std::tuple<>)>{};
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#ifdef TRIQS_COMPILER_IS_C11_COMPLIANT
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template<typename Tu,int ...I> using filter_t = typename filter_t_tr<Tu,I...>::type;
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#endif
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/**
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* filter_out<int ... I>(t) :
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* Given a tuple t, and integers, returns the tuple where the elements at initial position I are dropped.
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*/
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// pos = position in the tuple, c : counter tuplesize-1 ->0, I : position to filter
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template<int pos, int c, int ... I> struct filter_out_impl;
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// default case where pos != the first I : increase pos
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template<int pos, int c, int ... I> struct filter_out_impl<pos, c, pos, I...> : filter_out_impl<pos+1, c-1, I...> {};
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// when pos == first I
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template<int pos, int c, int ... I> struct filter_out_impl {
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template<typename TupleIn, typename TupleOut> auto operator() (TupleIn const & t, TupleOut && out) const
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DECL_AND_RETURN( filter_out_impl<pos+1,c-1, I...> ()( t, push_back(std::forward<TupleOut>(out),std::get<pos>(t))));
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};
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template<int pos, int ... I> struct filter_out_impl <pos,-1, I...> {
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template<typename TupleIn, typename TupleOut> TupleOut operator() (TupleIn const & t, TupleOut && out) const {return out;}
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};
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template<int ...I, typename Tu>
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auto filter_out(Tu const & tu) DECL_AND_RETURN ( filter_out_impl<0,std::tuple_size<Tu>::value-1, I...>()(tu, std::make_tuple()));
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template<typename Tu,int ...I> struct filter_out_t_tr : std::result_of< filter_out_impl<0,std::tuple_size<Tu>::value-1, I...>( Tu, std::tuple<>)>{};
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#ifdef TRIQS_COMPILER_IS_C11_COMPLIANT
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template<typename Tu,int ...I> using filter_out_t = typename filter_out_t_tr<Tu,I...>::type;
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#endif
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/**
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* inverse_filter<int L, int ... I>(t,x)
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* Given a tuple t, and integers, returns the tuple R of size L such that filter<I...>(R) == t
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* and the missing position are filled with object x.
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* Precondition (static_assert : sizeof...(I)==size of t)
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* and max (I) < L
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*/
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// pos = position in the tuple, c : counter tuplesize-1 ->0, I : position to filter
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template<int pos, int pos_in, int c, int ... I> struct inverse_filter_impl;
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// default case where pos != the first I
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template<int pos, int pos_in, int c, int ... I> struct inverse_filter_impl<pos, pos_in, c, pos, I...> {
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template<typename TupleIn, typename TupleOut, typename X> auto operator() (TupleIn const & t, TupleOut && out, X const & x) const
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DECL_AND_RETURN( inverse_filter_impl<pos+1,pos_in+1,c-1, I...> ()( t, push_back(std::forward<TupleOut>(out),std::get<pos_in>(t)),x));
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};
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// when pos == first I
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template<int pos, int pos_in, int c, int ... I> struct inverse_filter_impl {
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template<typename TupleIn, typename TupleOut, typename X> auto operator() (TupleIn const & t, TupleOut && out, X const & x) const
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DECL_AND_RETURN( inverse_filter_impl<pos+1,pos_in,c-1, I...> ()( t, push_back(std::forward<TupleOut>(out),x), x));
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};
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template<int pos, int pos_in, int ... I> struct inverse_filter_impl <pos,pos_in, -1, I...> {
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template<typename TupleIn, typename TupleOut, typename X> TupleOut operator() (TupleIn const &, TupleOut && out, X const &) const {return out;}
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};
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// put out for clearer error message
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template< typename Tu, typename X, int L, int ...I> struct inverse_filter_r_type {
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static_assert(sizeof...(I) == std::tuple_size<Tu>::value, "inverse filter : the # of int must be equal to the tuple size !!");
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typedef inverse_filter_impl<0,0,L-1, I...> type;
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};
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template<int L, int ...I, typename Tu, typename X>
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auto inverse_filter(Tu const & tu, X const &x) DECL_AND_RETURN ( typename inverse_filter_r_type<Tu, X, L, I...>::type ()(tu, std::make_tuple(),x));
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/**
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* inverse_filter_out<int ... I>(t,x)
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* Given a tuple t, and integers, returns the tuple R such that filter_out<I...>(R) == t
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* and the missing position are filled with object x.
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*/
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// pos = position in the tuple, c : counter tuplesize-1 ->0, I : position to filter
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template<int pos, int pos_in, int c, int ... I> struct inverse_filter_out_impl;
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// default case where pos != the first I
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template<int pos, int pos_in, int c, int ... I> struct inverse_filter_out_impl {
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template<typename TupleIn, typename TupleOut, typename X> auto operator() (TupleIn const & t, TupleOut && out, X const & x) const
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DECL_AND_RETURN( inverse_filter_out_impl<pos+1,pos_in+1,c-1, I...> ()( t, push_back(std::forward<TupleOut>(out),std::get<pos_in>(t)),x));
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};
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// when pos == first I
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template<int pos, int pos_in, int c, int ... I> struct inverse_filter_out_impl <pos, pos_in, c, pos, I...> {
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template<typename TupleIn, typename TupleOut, typename X> auto operator() (TupleIn const & t, TupleOut && out, X const & x) const
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DECL_AND_RETURN( inverse_filter_out_impl<pos+1,pos_in,c-1, I...> ()( t, push_back(std::forward<TupleOut>(out),x), x));
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};
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template<int pos, int pos_in, int ... I> struct inverse_filter_out_impl <pos,pos_in, -1, I...> {
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template<typename TupleIn, typename TupleOut, typename X> TupleOut operator() (TupleIn const &, TupleOut && out, X const &) const {return out;}
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};
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template<int ...I, typename Tu, typename X>
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auto inverse_filter_out(Tu const & tu, X const &x) DECL_AND_RETURN ( inverse_filter_out_impl<0,0,std::tuple_size<Tu>::value+sizeof...(I)-1, I...>()(tu, std::make_tuple(),x));
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/**
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* replace<int ... I>(t,r)
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* Given a tuple t, and integers, returns the tuple where the elements at initial position I are replaced by r
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*/
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// pos = position in the tuple, c : counter tuplesize-1 ->0, I : position to filter
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template<int pos, int c, int ... I> struct replace_impl;
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// default case where pos != the first I : increase pos
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template<int pos, int c, int ... I> struct replace_impl<pos, c, pos, I...> {
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template<typename TupleIn, typename TupleOut, typename R> auto operator() (TupleIn const & t, TupleOut && out, R const & r) const
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DECL_AND_RETURN( replace_impl<pos+1,c-1, I...> ()( t, push_back(std::forward<TupleOut>(out),r),r));
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};
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// when pos == first I
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template<int pos, int c, int ... I> struct replace_impl {
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template<typename TupleIn, typename TupleOut, typename R> auto operator() (TupleIn const & t, TupleOut && out, R const & r) const
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DECL_AND_RETURN( replace_impl<pos+1,c-1, I...> ()( t, push_back(std::forward<TupleOut>(out),std::get<pos>(t)), r));
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};
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template<int pos, int ... I> struct replace_impl <pos,-1, I...> {
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template<typename TupleIn, typename TupleOut, typename R> TupleOut operator() (TupleIn const & t, TupleOut && out, R const & r) const {return out;}
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};
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template<int ...I, typename Tu, typename R>
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auto replace(Tu const & tu, R const &r) DECL_AND_RETURN ( replace_impl<0,std::tuple_size<Tu>::value-1, I...>()(tu, std::make_tuple(),r));
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/*
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* print a tuple
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*/
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template<int a, int b> struct __s {};
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template<int L, typename T> void print_tuple_impl (std::ostream& os, T const& t, std::integral_constant<int,-1> ) {}
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template<int L, int rpos, typename T> void print_tuple_impl (std::ostream& os, T const& t, std::integral_constant<int,rpos> ) {
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os << std::get<L-rpos-1>(t);
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if (rpos>0) os << ',';
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print_tuple_impl<L>(os, t, std::integral_constant<int,rpos-1>());
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}
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}}
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namespace std {
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template<typename ... T> std::ostream & operator << (std::ostream & os, std::tuple<T...> const & t) {
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os << "(";
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constexpr int L = sizeof...(T);
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triqs::tuple::print_tuple_impl<L>(os,t,std::integral_constant<int,L-1>());
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return os << ")";
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}
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}
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#endif
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