mirror of
https://github.com/triqs/dft_tools
synced 2024-12-25 13:53:40 +01:00
e1c113b745
- evaluator - G(k,tau) is real - partial_eval for matrix_valued functions - details : simplifying traits (using decay_t)
476 lines
21 KiB
C++
476 lines
21 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_UTILITY_TUPLE_TOOLS_H
|
|
#define TRIQS_UTILITY_TUPLE_TOOLS_H
|
|
#include<triqs/utility/macros.hpp>
|
|
#include <tuple>
|
|
#include "./c14.hpp"
|
|
#include <sstream>
|
|
|
|
// adding to the std lib the reversed lazy tuple...
|
|
// overloading & specializing only the functions needed here.
|
|
namespace std {
|
|
template<typename TU> struct _triqs_reversed_tuple {TU _x;};
|
|
|
|
template<typename ... T> _triqs_reversed_tuple<std::tuple<T...>> reverse(std::tuple<T...> && x) { return {move(x)};}
|
|
template<typename ... T> _triqs_reversed_tuple<std::tuple<T...>&> reverse(std::tuple<T...> & x) { return {x};}
|
|
template<typename ... T> _triqs_reversed_tuple<std::tuple<T...>const &> reverse(std::tuple<T...> const & x) { return {x};}
|
|
|
|
template<int pos, typename TU> auto get(_triqs_reversed_tuple<TU> const & t)
|
|
DECL_AND_RETURN(std::get<std::tuple_size<std14::decay_t<TU>>::value-1-pos>(t._x));
|
|
|
|
template<int pos, typename TU> auto get(_triqs_reversed_tuple<TU> & t)
|
|
DECL_AND_RETURN(std::get<std::tuple_size<std14::decay_t<TU>>::value-1-pos>(t._x));
|
|
|
|
template<int pos, typename TU> auto get(_triqs_reversed_tuple<TU> && t)
|
|
DECL_AND_RETURN(std::get<std::tuple_size<std14::decay_t<TU>>::value-1-pos>(move(t)._x));
|
|
|
|
template<typename TU> class tuple_size<_triqs_reversed_tuple<TU>> : public tuple_size<std14::decay_t<TU>>{};
|
|
}
|
|
|
|
|
|
namespace triqs { namespace tuple {
|
|
|
|
/**
|
|
* t : a tuple
|
|
* x : anything
|
|
* push_back (t,x) -> returns new tuple with x append at the end
|
|
*/
|
|
template<typename T, typename X>
|
|
auto push_back(T && t, X &&x) DECL_AND_RETURN ( std::tuple_cat(std::forward<T>(t),std::make_tuple(std::forward<X>(x))));
|
|
|
|
/**
|
|
* t : a tuple
|
|
* x : anything
|
|
* push_front (t,x) -> returns new tuple with x append at the first position
|
|
*/
|
|
template<typename T, typename X>
|
|
auto push_front(T && t, X &&x) DECL_AND_RETURN ( std::tuple_cat(std::make_tuple(std::forward<X>(x)),std::forward<T>(t)));
|
|
|
|
/**
|
|
* apply(f, t)
|
|
* f : a callable object
|
|
* t a tuple
|
|
* Returns : f(t[0], t[1], ...)
|
|
* Equivalent to f(*t) in python ....
|
|
*/
|
|
template<int pos> struct apply_impl {
|
|
template<typename F, typename T, typename ... Args>
|
|
auto operator()(F && f, T const & t, Args && ... args)
|
|
DECL_AND_RETURN( apply_impl<pos-1>()(std::forward<F>(f),t, std::get<pos>(t), std::forward<Args>(args)...));
|
|
};
|
|
|
|
template<> struct apply_impl<-1> {
|
|
template<typename F, typename T, typename ... Args>
|
|
auto operator()(F && f, T const & t, Args && ... args) DECL_AND_RETURN( std::forward<F>(f)(std::forward<Args>(args)...));
|
|
};
|
|
|
|
template<typename F, typename T>
|
|
auto apply (F && f, T const & t) DECL_AND_RETURN( apply_impl<std::tuple_size<T>::value-1>()(std::forward<F>(f),t));
|
|
|
|
//template <typename T, typename ReturnType, typename... Args>
|
|
//ReturnType apply( ReturnType(*f)(Args...), T const & t) { return apply([f](Args const & ... args) { return (*f)(args...);} ,t);}
|
|
|
|
/**
|
|
* apply_construct<F>(t)
|
|
* F : a class
|
|
* t a tuple
|
|
* Returns : F { t[0], t[1]}
|
|
*/
|
|
template<int pos, typename F, typename T> struct apply_construct_impl {
|
|
template<typename ... Args>
|
|
auto operator()(T const & t, Args && ... args)
|
|
DECL_AND_RETURN( apply_construct_impl<pos-1,F,T>()(t, std::get<pos>(t), std::forward<Args>(args)...));
|
|
};
|
|
|
|
template<typename F, typename T> struct apply_construct_impl<-1,F,T> {
|
|
template<typename ... Args>
|
|
auto operator()(T const & t, Args && ... args) DECL_AND_RETURN( F{std::forward<Args>(args)...});
|
|
};
|
|
|
|
template<typename F, typename T>
|
|
auto apply_construct (T const & t) DECL_AND_RETURN( apply_construct_impl<std::tuple_size<T>::value-1,F,T>()(t));
|
|
|
|
|
|
/**
|
|
* for_each(f, t)
|
|
* f: a callable object
|
|
* t: a tuple
|
|
* calls f on all tuple elements: f(x) for all x in t
|
|
*/
|
|
template<int pos> struct for_each_impl {
|
|
template<typename T, typename F>
|
|
void operator()(T const & t, F && f) {
|
|
f(std::get<std::tuple_size<T>::value-1-pos>(t));
|
|
for_each_impl<pos-1>()(t, f);
|
|
}
|
|
};
|
|
|
|
template<>
|
|
struct for_each_impl<0> {
|
|
template<typename T, typename F>
|
|
void operator() (T const & t, F && f) { f(std::get<std::tuple_size<T>::value-1>(t)); }
|
|
};
|
|
|
|
template<typename T, typename F>
|
|
void for_each(T const & t, F && f) {
|
|
for_each_impl<std::tuple_size<T>::value-1>()(t, f);
|
|
}
|
|
|
|
/* for_each_enumerate(f, t)
|
|
* f: a callable object
|
|
* t: a tuple
|
|
* calls f on all tuple elements: f(x,n) for all x in t
|
|
*/
|
|
template<int pos> struct for_each_enumerate_impl {
|
|
template<typename T, typename F>
|
|
void operator()(T & t, F && f) {
|
|
f(std::get<std::tuple_size<std::c14::decay_t<T>>::value-1-pos>(t),std::tuple_size<T>::value-1-pos);
|
|
for_each_enumerate_impl<pos-1>()(t, f);
|
|
}
|
|
};
|
|
|
|
template<>
|
|
struct for_each_enumerate_impl<0> {
|
|
template<typename T, typename F>
|
|
void operator() (T & t, F && f) { f(std::get<std::tuple_size<std::c14::decay_t<T>>::value-1>(t), std::tuple_size<std::c14::decay_t<T>>::value-1); }
|
|
};
|
|
|
|
template<typename T, typename F>
|
|
void for_each_enumerate(T & t, F && f) {
|
|
for_each_enumerate_impl<std::tuple_size<std::c14::decay_t<T>>::value-1>()(t, f);
|
|
}
|
|
|
|
/**
|
|
* apply_on_tuple(f, t1,t2)
|
|
* f : a callable object
|
|
* t1, t2 two tuples of the same size
|
|
* Returns : [f(i,j) for i,j in zip(t1,t2)]
|
|
*/
|
|
template<int pos> struct apply_on_tuple_impl {
|
|
template<typename F, typename T1, typename ... Args>
|
|
auto operator()(F && f, T1 && t1, Args && ... args)
|
|
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)...));
|
|
};
|
|
|
|
template<> struct apply_on_tuple_impl<-1> {
|
|
template<typename F, typename T1, typename ... Args>
|
|
auto operator()(F && f, T1 && t1, Args && ... args) DECL_AND_RETURN( std::make_tuple(std::forward<Args>(args)...));
|
|
};
|
|
|
|
template<typename F, typename T1>
|
|
auto apply_on_tuple (F && f,T1 && t1) DECL_AND_RETURN( apply_on_tuple_impl<std::tuple_size<std14::decay_t<T1>>::value-1>()(std::forward<F>(f),std::forward<T1>(t1)));
|
|
|
|
/**
|
|
* apply_on_zip(f, t1,t2)
|
|
* f : a callable object
|
|
* t1, t2 two tuples of the same size
|
|
* Returns : [f(i,j) for i,j in zip(t1,t2)]
|
|
*/
|
|
template<int pos> struct apply_on_zip_impl {
|
|
template<typename F, typename T1, typename T2, typename ... Args>
|
|
auto operator()(F && f, T1 && t1, T2 && t2, Args && ... args)
|
|
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)...));
|
|
};
|
|
|
|
template<> struct apply_on_zip_impl<-1> {
|
|
template<typename F, typename T1, typename T2, typename ... Args>
|
|
auto operator()(F && f, T1 && t1, T2 && t2, Args && ... args) DECL_AND_RETURN( std::make_tuple(std::forward<Args>(args)...));
|
|
};
|
|
|
|
template<typename F, typename T1, typename T2>
|
|
auto apply_on_zip (F && f,T1 && t1, T2 && t2) DECL_AND_RETURN( apply_on_zip_impl<std::tuple_size<std14::decay_t<T1>>::value-1>()(std::forward<F>(f),std::forward<T1>(t1),std::forward<T2>(t2)));
|
|
|
|
/**
|
|
* apply_on_zip(f, t1,t2,t3)
|
|
* f : a callable object
|
|
* t1, t2 two tuples of the same size
|
|
* Returns : [f(i,j) for i,j in zip(t1,t2)]
|
|
*/
|
|
template<int pos> struct apply_on_zip3_impl {
|
|
template<typename F, typename T1, typename T2, typename T3, typename ... Args>
|
|
auto operator()(F && f, T1 && t1, T2 && t2, T3 && t3, Args && ... args)
|
|
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),
|
|
f(std::get<pos>(t1),std::get<pos>(t2),std::get<pos>(t3)), std::forward<Args>(args)...));
|
|
};
|
|
|
|
template<> struct apply_on_zip3_impl<-1> {
|
|
template<typename F, typename T1, typename T2, typename T3,typename ... Args>
|
|
auto operator()(F && f, T1 && t1, T2 && t2, T3 && t3, Args && ... args) DECL_AND_RETURN( std::make_tuple(std::forward<Args>(args)...));
|
|
};
|
|
|
|
template<typename F, typename T1, typename T2, typename T3>
|
|
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)));
|
|
|
|
/**
|
|
* call_on_zip(f, t1,t2,t3)
|
|
* f : a callable object
|
|
* t1, t2, t3 three tuples of the same size
|
|
* Returns : void
|
|
* Effect : calls f(i,j,k) for all(i,j,k) in zip(t1,t2,t3)]
|
|
*/
|
|
template<int pos> struct call_on_zip3_impl {
|
|
template<typename F, typename T1, typename T2, typename T3>
|
|
void operator()(F && f, T1 && t1, T2 && t2, T3 && t3) {
|
|
f(std::get<pos>(std::forward<T1>(t1)),std::get<pos>(std::forward<T2>(t2)),std::get<pos>(std::forward<T3>(t3)));
|
|
call_on_zip3_impl<pos-1>()(std::forward<F>(f),std::forward<T1>(t1), std::forward<T2>(t2), std::forward<T3>(t3));
|
|
}
|
|
};
|
|
|
|
template<> struct call_on_zip3_impl<-1> {
|
|
template<typename F, typename T1, typename T2, typename T3> void operator()(F && f, T1 && t1, T2 && t2, T3 && t3){}
|
|
};
|
|
|
|
template<typename F, typename T1, typename T2, typename T3>
|
|
void call_on_zip (F && f,T1 && t1, T2 && t2, T3 && t3) {
|
|
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));
|
|
}
|
|
|
|
/**
|
|
* fold(f, t1, init)
|
|
* f : a callable object
|
|
* t a tuple
|
|
* Returns : f(xN,f(x_N-1,...f(x0,r)) on the tuple
|
|
*/
|
|
template<int N, int pos, typename T> struct fold_impl {
|
|
template<typename F, typename R>
|
|
auto operator()(F && f, T && t, R && r )
|
|
DECL_AND_RETURN( fold_impl<N,pos-1,T>()(std::forward<F>(f),std::forward<T>(t), f(std::get<N-1-pos>(t), std::forward<R>(r))));
|
|
};
|
|
|
|
template<int N, typename T> struct fold_impl<N, -1,T> {
|
|
template<typename F, typename R> R operator()(F && f, T && t, R && r) {return std::forward<R>(r);}
|
|
};
|
|
|
|
template<typename F, typename T, typename R>
|
|
auto fold (F && f,T && t, R && r) DECL_AND_RETURN( fold_impl<std::tuple_size<std::c14::decay_t<T>>::value,std::tuple_size<std::c14::decay_t<T>>::value-1,T>()(std::forward<F>(f),std::forward<T>(t),std::forward<R>(r)));
|
|
//template<typename F, typename T, typename R>
|
|
// 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)));
|
|
|
|
/**
|
|
* fold_on_zip(f, t1, t2, init)
|
|
* f : a callable object
|
|
* t1, t2 two tuples of the same size
|
|
* Returns : f(x0,y0,f(x1,y1,,f(....)) for t1 = (x0,x1 ...) and t2 = (y0,y1...).
|
|
*/
|
|
template<int pos, typename T1, typename T2> struct fold_on_zip_impl {
|
|
template<typename F, typename R>
|
|
auto operator()(F && f, T1 const & t1, T2 const & t2, R && r )
|
|
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))));
|
|
};
|
|
|
|
template<typename T1, typename T2> struct fold_on_zip_impl<-1,T1,T2> {
|
|
template<typename F, typename R> R operator()(F && f, T1 const & t1, T2 const & t2, R && r) {return std::forward<R>(r);}
|
|
};
|
|
|
|
template<typename F, typename T1, typename T2, typename R>
|
|
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)));
|
|
|
|
/**
|
|
* filter<int ... I>(t) :
|
|
* Given a tuple t, and integers, returns the tuple where the elements at initial position I are dropped.
|
|
*/
|
|
|
|
// pos = position in the tuple, c : counter tuplesize-1 ->0, I : position to filter
|
|
template<int pos, int c, int ... I> struct filter_impl;
|
|
|
|
// default case where pos != the first I : increase pos
|
|
template<int pos, int c, int ... I> struct filter_impl : filter_impl<pos+1, c-1, I...> {};
|
|
|
|
// when pos == first I
|
|
template<int pos, int c, int ... I> struct filter_impl<pos, c, pos, I...> {
|
|
template<typename TupleIn, typename TupleOut> auto operator() (TupleIn const & t, TupleOut && out) const
|
|
DECL_AND_RETURN( filter_impl<pos+1,c-1, I...>() ( t, push_back(std::forward<TupleOut>(out),std::get<pos>(t))));
|
|
};
|
|
|
|
template<int pos, int ... I> struct filter_impl <pos,-1, I...> {
|
|
template<typename TupleIn, typename TupleOut> TupleOut operator() (TupleIn const & t, TupleOut && out) const {return out;}
|
|
};
|
|
|
|
template<int ...I, typename Tu>
|
|
auto filter(Tu const & tu) DECL_AND_RETURN ( filter_impl<0,std::tuple_size<Tu>::value-1, I...>()(tu, std::make_tuple()));
|
|
|
|
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<>)>{};
|
|
|
|
template<typename Tu,int ...I> using filter_t = typename filter_t_tr<Tu,I...>::type;
|
|
|
|
/**
|
|
* filter_out<int ... I>(t) :
|
|
* Given a tuple t, and integers, returns the tuple where the elements at initial position I are dropped.
|
|
*/
|
|
|
|
// pos = position in the tuple, c : counter tuplesize-1 ->0, I : position to filter
|
|
template<int pos, int c, int ... I> struct filter_out_impl;
|
|
|
|
// default case where pos != the first I : increase pos
|
|
template<int pos, int c, int ... I> struct filter_out_impl<pos, c, pos, I...> : filter_out_impl<pos+1, c-1, I...> {};
|
|
|
|
// when pos == first I
|
|
template<int pos, int c, int ... I> struct filter_out_impl {
|
|
template<typename TupleIn, typename TupleOut> auto operator() (TupleIn const & t, TupleOut && out) const
|
|
DECL_AND_RETURN( filter_out_impl<pos+1,c-1, I...> ()( t, push_back(std::forward<TupleOut>(out),std::get<pos>(t))));
|
|
};
|
|
|
|
template<int pos, int ... I> struct filter_out_impl <pos,-1, I...> {
|
|
template<typename TupleIn, typename TupleOut> TupleOut operator() (TupleIn const & t, TupleOut && out) const {return out;}
|
|
};
|
|
|
|
template<int ...I, typename Tu>
|
|
auto filter_out(Tu const & tu) DECL_AND_RETURN ( filter_out_impl<0,std::tuple_size<Tu>::value-1, I...>()(tu, std::make_tuple()));
|
|
|
|
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<>)>{};
|
|
|
|
template<typename Tu,int ...I> using filter_out_t = typename filter_out_t_tr<Tu,I...>::type;
|
|
|
|
/**
|
|
* inverse_filter<int L, int ... I>(t,x)
|
|
* Given a tuple t, and integers, returns the tuple R of size L such that filter<I...>(R) == t
|
|
* and the missing position are filled with object x.
|
|
* Precondition (static_assert : sizeof...(I)==size of t)
|
|
* and max (I) < L
|
|
*/
|
|
|
|
// pos = position in the tuple, c : counter tuplesize-1 ->0, I : position to filter
|
|
template<int pos, int pos_in, int c, int ... I> struct inverse_filter_impl;
|
|
|
|
// default case where pos != the first I
|
|
template<int pos, int pos_in, int c, int ... I> struct inverse_filter_impl<pos, pos_in, c, pos, I...> {
|
|
template<typename TupleIn, typename TupleOut, typename X> auto operator() (TupleIn const & t, TupleOut && out, X const & x) const
|
|
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));
|
|
};
|
|
|
|
// when pos == first I
|
|
template<int pos, int pos_in, int c, int ... I> struct inverse_filter_impl {
|
|
template<typename TupleIn, typename TupleOut, typename X> auto operator() (TupleIn const & t, TupleOut && out, X const & x) const
|
|
DECL_AND_RETURN( inverse_filter_impl<pos+1,pos_in,c-1, I...> ()( t, push_back(std::forward<TupleOut>(out),x), x));
|
|
};
|
|
|
|
template<int pos, int pos_in, int ... I> struct inverse_filter_impl <pos,pos_in, -1, I...> {
|
|
template<typename TupleIn, typename TupleOut, typename X> TupleOut operator() (TupleIn const &, TupleOut && out, X const &) const {return out;}
|
|
};
|
|
|
|
// put out for clearer error message
|
|
template< typename Tu, typename X, int L, int ...I> struct inverse_filter_r_type {
|
|
static_assert(sizeof...(I) == std::tuple_size<Tu>::value, "inverse filter : the # of int must be equal to the tuple size !!");
|
|
typedef inverse_filter_impl<0,0,L-1, I...> type;
|
|
};
|
|
|
|
template<int L, int ...I, typename Tu, typename X>
|
|
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));
|
|
|
|
/**
|
|
* inverse_filter_out<int ... I>(t,x)
|
|
* Given a tuple t, and integers, returns the tuple R such that filter_out<I...>(R) == t
|
|
* and the missing position are filled with object x.
|
|
*/
|
|
|
|
// pos = position in the tuple, c : counter tuplesize-1 ->0, I : position to filter
|
|
template<int pos, int pos_in, int c, int ... I> struct inverse_filter_out_impl;
|
|
|
|
// default case where pos != the first I
|
|
template<int pos, int pos_in, int c, int ... I> struct inverse_filter_out_impl {
|
|
template<typename TupleIn, typename TupleOut, typename X> auto operator() (TupleIn const & t, TupleOut && out, X const & x) const
|
|
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));
|
|
};
|
|
|
|
// when pos == first I
|
|
template<int pos, int pos_in, int c, int ... I> struct inverse_filter_out_impl <pos, pos_in, c, pos, I...> {
|
|
template<typename TupleIn, typename TupleOut, typename X> auto operator() (TupleIn const & t, TupleOut && out, X const & x) const
|
|
DECL_AND_RETURN( inverse_filter_out_impl<pos+1,pos_in,c-1, I...> ()( t, push_back(std::forward<TupleOut>(out),x), x));
|
|
};
|
|
|
|
template<int pos, int pos_in, int ... I> struct inverse_filter_out_impl <pos,pos_in, -1, I...> {
|
|
template<typename TupleIn, typename TupleOut, typename X> TupleOut operator() (TupleIn const &, TupleOut && out, X const &) const {return out;}
|
|
};
|
|
|
|
template<int ...I, typename Tu, typename X>
|
|
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));
|
|
|
|
/**
|
|
* replace<int ... I>(t,r)
|
|
* Given a tuple t, and integers, returns the tuple where the elements at initial position I are replaced by r
|
|
*/
|
|
|
|
// pos = position in the tuple, c : counter tuplesize-1 ->0, I : position to filter
|
|
template<int pos, int c, int ... I> struct replace_impl;
|
|
|
|
// default case where pos != the first I : increase pos
|
|
template<int pos, int c, int ... I> struct replace_impl<pos, c, pos, I...> {
|
|
template<typename TupleIn, typename TupleOut, typename R> auto operator() (TupleIn const & t, TupleOut && out, R const & r) const
|
|
DECL_AND_RETURN( replace_impl<pos+1,c-1, I...> ()( t, push_back(std::forward<TupleOut>(out),r),r));
|
|
};
|
|
|
|
// when pos == first I
|
|
template<int pos, int c, int ... I> struct replace_impl {
|
|
template<typename TupleIn, typename TupleOut, typename R> auto operator() (TupleIn const & t, TupleOut && out, R const & r) const
|
|
DECL_AND_RETURN( replace_impl<pos+1,c-1, I...> ()( t, push_back(std::forward<TupleOut>(out),std::get<pos>(t)), r));
|
|
};
|
|
|
|
template<int pos, int ... I> struct replace_impl <pos,-1, I...> {
|
|
template<typename TupleIn, typename TupleOut, typename R> TupleOut operator() (TupleIn const & t, TupleOut && out, R const & r) const {return out;}
|
|
};
|
|
|
|
template<int ...I, typename Tu, typename R>
|
|
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));
|
|
|
|
|
|
/*
|
|
* print a tuple
|
|
*/
|
|
template<int a, int b> struct __s {};
|
|
template<int L, typename T> void print_tuple_impl (std::ostream& os, T const& t, std::integral_constant<int,-1> ) {}
|
|
template<int L, int rpos, typename T> void print_tuple_impl (std::ostream& os, T const& t, std::integral_constant<int,rpos> ) {
|
|
os << std::get<L-rpos-1>(t);
|
|
if (rpos>0) os << ',';
|
|
print_tuple_impl<L>(os, t, std::integral_constant<int,rpos-1>());
|
|
}
|
|
}}
|
|
|
|
namespace std {
|
|
template<typename ... T> std::ostream & operator << (std::ostream & os, std::tuple<T...> const & t) {
|
|
os << "(";
|
|
constexpr int L = sizeof...(T);
|
|
triqs::tuple::print_tuple_impl<L>(os,t,std::integral_constant<int,L-1>());
|
|
return os << ")";
|
|
}
|
|
}
|
|
|
|
namespace std {
|
|
namespace c14 {
|
|
|
|
// a little helper class to wait for the correction that tuple construct is NOT explicit
|
|
template <typename... Args> class tuple : public std::tuple<Args...> {
|
|
public:
|
|
template <typename... Args2> tuple(Args2 &&... args2) : std::tuple<Args...>(std::forward<Args2>(args2)...) {}
|
|
};
|
|
}
|
|
|
|
// minimal hack to get the metaprogramming work with this tuple too....
|
|
template <int i, typename... Args>
|
|
auto get(c14::tuple<Args...> const &t) DECL_AND_RETURN(std::get<i>(static_cast<std::tuple<Args...>>(t)));
|
|
|
|
template <typename... Args> class tuple_size<c14::tuple<Args...>> : public tuple_size<std::tuple<Args...>> {};
|
|
|
|
}
|
|
|
|
#endif
|
|
|