root / lab4 / .minix-src / include / c++ / experimental / tuple
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| 1 | 13 | up20180614 | // -*- C++ -*- |
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| 2 | //===----------------------------- tuple ----------------------------------===// |
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| 3 | // |
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| 4 | // The LLVM Compiler Infrastructure |
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| 5 | // |
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| 6 | // This file is dual licensed under the MIT and the University of Illinois Open |
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| 7 | // Source Licenses. See LICENSE.TXT for details. |
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| 8 | // |
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| 9 | //===----------------------------------------------------------------------===// |
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| 10 | |||
| 11 | #ifndef _LIBCPP_EXPERIMENTAL_TUPLE |
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| 12 | #define _LIBCPP_EXPERIMENTAL_TUPLE |
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| 13 | |||
| 14 | /* |
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| 15 | experimental/tuple synopsis |
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| 16 | |||
| 17 | // C++1y |
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| 18 | |||
| 19 | #include <tuple> |
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| 20 | |||
| 21 | namespace std {
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| 22 | namespace experimental {
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| 23 | inline namespace fundamentals_v1 {
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| 24 | |||
| 25 | // See C++14 20.4.2.5, tuple helper classes |
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| 26 | template <class T> constexpr size_t tuple_size_v |
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| 27 | = tuple_size<T>::value; |
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| 28 | |||
| 29 | // 3.2.2, Calling a function with a tuple of arguments |
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| 30 | template <class F, class Tuple> |
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| 31 | constexpr decltype(auto) apply(F&& f, Tuple&& t); |
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| 32 | |||
| 33 | } // namespace fundamentals_v1 |
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| 34 | } // namespace experimental |
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| 35 | } // namespace std |
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| 36 | |||
| 37 | */ |
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| 38 | |||
| 39 | # include <experimental/__config> |
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| 40 | |||
| 41 | #if _LIBCPP_STD_VER > 11 |
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| 42 | |||
| 43 | # include <tuple> |
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| 44 | # include <utility> |
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| 45 | # include <__functional_base> |
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| 46 | |||
| 47 | #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) |
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| 48 | #pragma GCC system_header |
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| 49 | #endif |
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| 50 | |||
| 51 | _LIBCPP_BEGIN_NAMESPACE_LFTS |
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| 52 | |||
| 53 | #ifndef _LIBCPP_HAS_NO_VARIABLE_TEMPLATES |
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| 54 | template <class _Tp> |
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| 55 | _LIBCPP_CONSTEXPR size_t tuple_size_v = tuple_size<_Tp>::value; |
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| 56 | #endif |
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| 57 | |||
| 58 | template <class _Fn, class _Tuple, size_t ..._Id> |
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| 59 | inline _LIBCPP_INLINE_VISIBILITY |
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| 60 | decltype(auto) __apply_tuple_impl(_Fn && __f, _Tuple && __t, |
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| 61 | integer_sequence<size_t, _Id...>) {
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| 62 | return _VSTD::__invoke( |
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| 63 | _VSTD::forward<_Fn>(__f), |
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| 64 | _VSTD::get<_Id>(_VSTD::forward<_Tuple>(__t))... |
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| 65 | ); |
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| 66 | } |
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| 67 | |||
| 68 | template <class _Fn, class _Tuple> |
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| 69 | inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 |
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| 70 | decltype(auto) apply(_Fn && __f, _Tuple && __t) {
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| 71 | return _VSTD_LFTS::__apply_tuple_impl( |
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| 72 | _VSTD::forward<_Fn>(__f), _VSTD::forward<_Tuple>(__t), |
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| 73 | make_index_sequence<tuple_size<typename decay<_Tuple>::type>::value>() |
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| 74 | ); |
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| 75 | } |
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| 76 | |||
| 77 | _LIBCPP_END_NAMESPACE_LFTS |
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| 78 | |||
| 79 | #endif /* _LIBCPP_STD_VER > 11 */ |
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| 80 | |||
| 81 | #endif /* _LIBCPP_EXPERIMENTAL_TUPLE */ |