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tuple_tools : add push_back/front, call_on_zip

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- changed apply_on_zip3 -> apply_on_zip ...
This commit is contained in:
Olivier Parcollet 2013-07-29 20:43:37 +02:00
parent 0cdfc4f2d3
commit 0172c61892
1 changed files with 42 additions and 2 deletions
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44
triqs/utility/tuple_tools.hpp
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@ -26,6 +26,22 @@
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 const &t, X const &x) DECL_AND_RETURN ( std::tuple_cat(t,std::make_tuple(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 const &t, X const &x) DECL_AND_RETURN ( std::tuple_cat(std::make_tuple(x),t));
/**
* apply(f, t)
* f : a callable object
@ -164,7 +180,7 @@ namespace triqs { namespace tuple {
auto apply_on_zip (F && f,T1 && t1, T2 && t2) DECL_AND_RETURN( apply_on_zip_impl<std::tuple_size<typename std::remove_reference<T1>::type>::value-1>()(std::forward<F>(f),std::forward<T1>(t1),std::forward<T2>(t2)));
/**
* apply_on_tuple(f, t1,t2,t3)
* 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)]
@ -182,7 +198,31 @@ namespace triqs { namespace tuple {
};
template<typename F, typename T1, typename T2, typename T3>
auto apply_on_zip3 (F && f,T1 && t1, T2 && t2, T3 && t3) DECL_AND_RETURN( apply_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)));
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_reference<T1>::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)