113858ee05627bba4d0e7609ff84ad71d8d7e3ca0Eric Fiselier//===----------------------------------------------------------------------===// 213858ee05627bba4d0e7609ff84ad71d8d7e3ca0Eric Fiselier// 313858ee05627bba4d0e7609ff84ad71d8d7e3ca0Eric Fiselier// The LLVM Compiler Infrastructure 413858ee05627bba4d0e7609ff84ad71d8d7e3ca0Eric Fiselier// 513858ee05627bba4d0e7609ff84ad71d8d7e3ca0Eric Fiselier// This file is dual licensed under the MIT and the University of Illinois Open 613858ee05627bba4d0e7609ff84ad71d8d7e3ca0Eric Fiselier// Source Licenses. See LICENSE.TXT for details. 713858ee05627bba4d0e7609ff84ad71d8d7e3ca0Eric Fiselier// 813858ee05627bba4d0e7609ff84ad71d8d7e3ca0Eric Fiselier//===----------------------------------------------------------------------===// 913858ee05627bba4d0e7609ff84ad71d8d7e3ca0Eric Fiselier 1013858ee05627bba4d0e7609ff84ad71d8d7e3ca0Eric Fiselier// UNSUPPORTED: c++98, c++03, c++11 1113858ee05627bba4d0e7609ff84ad71d8d7e3ca0Eric Fiselier 1213858ee05627bba4d0e7609ff84ad71d8d7e3ca0Eric Fiselier// <experimental/tuple> 1313858ee05627bba4d0e7609ff84ad71d8d7e3ca0Eric Fiselier 1413858ee05627bba4d0e7609ff84ad71d8d7e3ca0Eric Fiselier// template <class F, class T> constexpr decltype(auto) apply(F &&, T &&) 1513858ee05627bba4d0e7609ff84ad71d8d7e3ca0Eric Fiselier 1613858ee05627bba4d0e7609ff84ad71d8d7e3ca0Eric Fiselier// Testing ref qualified functions 1713858ee05627bba4d0e7609ff84ad71d8d7e3ca0Eric Fiselier 1813858ee05627bba4d0e7609ff84ad71d8d7e3ca0Eric Fiselier#include <experimental/tuple> 1913858ee05627bba4d0e7609ff84ad71d8d7e3ca0Eric Fiselier#include <cassert> 2013858ee05627bba4d0e7609ff84ad71d8d7e3ca0Eric Fiselier 2113858ee05627bba4d0e7609ff84ad71d8d7e3ca0Eric Fiselierstruct func_obj 2213858ee05627bba4d0e7609ff84ad71d8d7e3ca0Eric Fiselier{ 2313858ee05627bba4d0e7609ff84ad71d8d7e3ca0Eric Fiselier constexpr func_obj() {} 2413858ee05627bba4d0e7609ff84ad71d8d7e3ca0Eric Fiselier 2513858ee05627bba4d0e7609ff84ad71d8d7e3ca0Eric Fiselier constexpr int operator()() const & { return 1; } 2613858ee05627bba4d0e7609ff84ad71d8d7e3ca0Eric Fiselier constexpr int operator()() const && { return 2; } 2713858ee05627bba4d0e7609ff84ad71d8d7e3ca0Eric Fiselier constexpr int operator()() & { return 3; } 2813858ee05627bba4d0e7609ff84ad71d8d7e3ca0Eric Fiselier constexpr int operator()() && { return 4; } 2913858ee05627bba4d0e7609ff84ad71d8d7e3ca0Eric Fiselier}; 3013858ee05627bba4d0e7609ff84ad71d8d7e3ca0Eric Fiselier 3113858ee05627bba4d0e7609ff84ad71d8d7e3ca0Eric Fiseliernamespace ex = std::experimental; 3213858ee05627bba4d0e7609ff84ad71d8d7e3ca0Eric Fiselier 3313858ee05627bba4d0e7609ff84ad71d8d7e3ca0Eric Fiselierint main() 3413858ee05627bba4d0e7609ff84ad71d8d7e3ca0Eric Fiselier{ 35c254b36c2947d20f092d21d88f2d0a1ea6856466Eric Fiselier// TODO(ericwf): Re-enable constexpr support 36c254b36c2947d20f092d21d88f2d0a1ea6856466Eric Fiselier/* 3713858ee05627bba4d0e7609ff84ad71d8d7e3ca0Eric Fiselier { 3813858ee05627bba4d0e7609ff84ad71d8d7e3ca0Eric Fiselier constexpr func_obj f; 3913858ee05627bba4d0e7609ff84ad71d8d7e3ca0Eric Fiselier constexpr std::tuple<> tp; 4013858ee05627bba4d0e7609ff84ad71d8d7e3ca0Eric Fiselier 4113858ee05627bba4d0e7609ff84ad71d8d7e3ca0Eric Fiselier static_assert(1 == ex::apply(static_cast<func_obj const &>(f), tp), ""); 4213858ee05627bba4d0e7609ff84ad71d8d7e3ca0Eric Fiselier static_assert(2 == ex::apply(static_cast<func_obj const &&>(f), tp), ""); 4313858ee05627bba4d0e7609ff84ad71d8d7e3ca0Eric Fiselier } 44c254b36c2947d20f092d21d88f2d0a1ea6856466Eric Fiselier*/ 4513858ee05627bba4d0e7609ff84ad71d8d7e3ca0Eric Fiselier { 4613858ee05627bba4d0e7609ff84ad71d8d7e3ca0Eric Fiselier func_obj f; 4713858ee05627bba4d0e7609ff84ad71d8d7e3ca0Eric Fiselier std::tuple<> tp; 4813858ee05627bba4d0e7609ff84ad71d8d7e3ca0Eric Fiselier assert(1 == ex::apply(static_cast<func_obj const &>(f), tp)); 4913858ee05627bba4d0e7609ff84ad71d8d7e3ca0Eric Fiselier assert(2 == ex::apply(static_cast<func_obj const &&>(f), tp)); 5013858ee05627bba4d0e7609ff84ad71d8d7e3ca0Eric Fiselier assert(3 == ex::apply(static_cast<func_obj &>(f), tp)); 5113858ee05627bba4d0e7609ff84ad71d8d7e3ca0Eric Fiselier assert(4 == ex::apply(static_cast<func_obj &&>(f), tp)); 5213858ee05627bba4d0e7609ff84ad71d8d7e3ca0Eric Fiselier } 5313858ee05627bba4d0e7609ff84ad71d8d7e3ca0Eric Fiselier} 54