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Add tuple_apply

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This commit is contained in:
Peter Dimov
2017-06-08 17:19:28 +03:00
parent 97720ed72d
commit 359ae25630
8 changed files with 323 additions and 1 deletions
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20
include/boost/mp11_single.hpp
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@@ -2675,6 +2675,26 @@ namespace boost
namespace mp11
{
// tuple_apply
namespace detail
{
template<class F, class Tp, std::size_t... J> BOOST_CONSTEXPR auto tuple_apply_impl( F && f, Tp && tp, integer_sequence<std::size_t, J...> )
-> decltype( std::forward<F>(f)( std::get<J>(std::forward<Tp>(tp))... ) )
{
return std::forward<F>(f)( std::get<J>(std::forward<Tp>(tp))... );
}
} // namespace detail
template<class F, class Tp,
class Seq = make_index_sequence<std::tuple_size<typename std::remove_reference<Tp>::type>::value>>
BOOST_CONSTEXPR auto tuple_apply( F && f, Tp && tp )
-> decltype( detail::tuple_apply_impl( std::forward<F>(f), std::forward<Tp>(tp), Seq() ) )
{
return detail::tuple_apply_impl( std::forward<F>(f), std::forward<Tp>(tp), Seq() );
}
// tuple_for_each
namespace detail
{