29 #ifndef _GLIBCXX_EXPERIMENTAL_TUPLE
30 #define _GLIBCXX_EXPERIMENTAL_TUPLE 1
32 #pragma GCC system_header
34 #if __cplusplus >= 201402L
40 namespace std _GLIBCXX_VISIBILITY(default)
42 _GLIBCXX_BEGIN_NAMESPACE_VERSION
44 namespace experimental
46 inline namespace fundamentals_v1
49 template <
typename _Tp>
50 constexpr
size_t tuple_size_v = tuple_size<_Tp>::value;
52 #define __cpp_lib_experimental_tuple 201402
54 template <
typename _Fn,
typename _Tuple, std::size_t... _Idx>
55 constexpr decltype(
auto)
56 __apply_impl(_Fn&& __f, _Tuple&& __t, std::
index_sequence<_Idx...>)
58 return std::__invoke(std::forward<_Fn>(__f),
59 std::get<_Idx>(std::forward<_Tuple>(__t))...);
62 template <
typename _Fn,
typename _Tuple>
63 constexpr decltype(
auto)
64 apply(_Fn&& __f, _Tuple&& __t)
68 return experimental::__apply_impl(std::forward<_Fn>(__f),
69 std::forward<_Tuple>(__t),
75 _GLIBCXX_END_NAMESPACE_VERSION
80 #endif // _GLIBCXX_EXPERIMENTAL_TUPLE
Class template integer_sequence.
integer_sequence< size_t, _Idx...> index_sequence
Alias template index_sequence.