1*0a6a1f1dSLionel Sambuc// -*- C++ -*- 2*0a6a1f1dSLionel Sambuc//===----------------------------- tuple ----------------------------------===// 3*0a6a1f1dSLionel Sambuc// 4*0a6a1f1dSLionel Sambuc// The LLVM Compiler Infrastructure 5*0a6a1f1dSLionel Sambuc// 6*0a6a1f1dSLionel Sambuc// This file is dual licensed under the MIT and the University of Illinois Open 7*0a6a1f1dSLionel Sambuc// Source Licenses. See LICENSE.TXT for details. 8*0a6a1f1dSLionel Sambuc// 9*0a6a1f1dSLionel Sambuc//===----------------------------------------------------------------------===// 10*0a6a1f1dSLionel Sambuc 11*0a6a1f1dSLionel Sambuc#ifndef _LIBCPP_EXPERIMENTAL_TUPLE 12*0a6a1f1dSLionel Sambuc#define _LIBCPP_EXPERIMENTAL_TUPLE 13*0a6a1f1dSLionel Sambuc 14*0a6a1f1dSLionel Sambuc/* 15*0a6a1f1dSLionel Sambuc experimental/tuple synopsis 16*0a6a1f1dSLionel Sambuc 17*0a6a1f1dSLionel Sambuc// C++1y 18*0a6a1f1dSLionel Sambuc 19*0a6a1f1dSLionel Sambuc#include <tuple> 20*0a6a1f1dSLionel Sambuc 21*0a6a1f1dSLionel Sambucnamespace std { 22*0a6a1f1dSLionel Sambucnamespace experimental { 23*0a6a1f1dSLionel Sambucinline namespace fundamentals_v1 { 24*0a6a1f1dSLionel Sambuc 25*0a6a1f1dSLionel Sambuc // See C++14 20.4.2.5, tuple helper classes 26*0a6a1f1dSLionel Sambuc template <class T> constexpr size_t tuple_size_v 27*0a6a1f1dSLionel Sambuc = tuple_size<T>::value; 28*0a6a1f1dSLionel Sambuc 29*0a6a1f1dSLionel Sambuc // 3.2.2, Calling a function with a tuple of arguments 30*0a6a1f1dSLionel Sambuc template <class F, class Tuple> 31*0a6a1f1dSLionel Sambuc constexpr decltype(auto) apply(F&& f, Tuple&& t); 32*0a6a1f1dSLionel Sambuc 33*0a6a1f1dSLionel Sambuc} // namespace fundamentals_v1 34*0a6a1f1dSLionel Sambuc} // namespace experimental 35*0a6a1f1dSLionel Sambuc} // namespace std 36*0a6a1f1dSLionel Sambuc 37*0a6a1f1dSLionel Sambuc */ 38*0a6a1f1dSLionel Sambuc 39*0a6a1f1dSLionel Sambuc# include <experimental/__config> 40*0a6a1f1dSLionel Sambuc 41*0a6a1f1dSLionel Sambuc#if _LIBCPP_STD_VER > 11 42*0a6a1f1dSLionel Sambuc 43*0a6a1f1dSLionel Sambuc# include <tuple> 44*0a6a1f1dSLionel Sambuc# include <utility> 45*0a6a1f1dSLionel Sambuc# include <__functional_base> 46*0a6a1f1dSLionel Sambuc 47*0a6a1f1dSLionel Sambuc#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 48*0a6a1f1dSLionel Sambuc#pragma GCC system_header 49*0a6a1f1dSLionel Sambuc#endif 50*0a6a1f1dSLionel Sambuc 51*0a6a1f1dSLionel Sambuc_LIBCPP_BEGIN_NAMESPACE_LFTS 52*0a6a1f1dSLionel Sambuc 53*0a6a1f1dSLionel Sambuc#ifndef _LIBCPP_HAS_NO_VARIABLE_TEMPLATES 54*0a6a1f1dSLionel Sambuctemplate <class _Tp> 55*0a6a1f1dSLionel Sambuc_LIBCPP_CONSTEXPR size_t tuple_size_v = tuple_size<_Tp>::value; 56*0a6a1f1dSLionel Sambuc#endif 57*0a6a1f1dSLionel Sambuc 58*0a6a1f1dSLionel Sambuctemplate <class _Fn, class _Tuple, size_t ..._Id> 59*0a6a1f1dSLionel Sambucinline _LIBCPP_INLINE_VISIBILITY 60*0a6a1f1dSLionel Sambucdecltype(auto) __apply_tuple_impl(_Fn && __f, _Tuple && __t, 61*0a6a1f1dSLionel Sambuc integer_sequence<size_t, _Id...>) { 62*0a6a1f1dSLionel Sambuc return _VSTD::__invoke( 63*0a6a1f1dSLionel Sambuc _VSTD::forward<_Fn>(__f), 64*0a6a1f1dSLionel Sambuc _VSTD::get<_Id>(_VSTD::forward<_Tuple>(__t))... 65*0a6a1f1dSLionel Sambuc ); 66*0a6a1f1dSLionel Sambuc} 67*0a6a1f1dSLionel Sambuc 68*0a6a1f1dSLionel Sambuctemplate <class _Fn, class _Tuple> 69*0a6a1f1dSLionel Sambucinline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 70*0a6a1f1dSLionel Sambucdecltype(auto) apply(_Fn && __f, _Tuple && __t) { 71*0a6a1f1dSLionel Sambuc return _VSTD_LFTS::__apply_tuple_impl( 72*0a6a1f1dSLionel Sambuc _VSTD::forward<_Fn>(__f), _VSTD::forward<_Tuple>(__t), 73*0a6a1f1dSLionel Sambuc make_index_sequence<tuple_size<typename decay<_Tuple>::type>::value>() 74*0a6a1f1dSLionel Sambuc ); 75*0a6a1f1dSLionel Sambuc} 76*0a6a1f1dSLionel Sambuc 77*0a6a1f1dSLionel Sambuc_LIBCPP_END_NAMESPACE_LFTS 78*0a6a1f1dSLionel Sambuc 79*0a6a1f1dSLionel Sambuc#endif /* _LIBCPP_STD_VER > 11 */ 80*0a6a1f1dSLionel Sambuc 81*0a6a1f1dSLionel Sambuc#endif /* _LIBCPP_EXPERIMENTAL_TUPLE */ 82