1 //===----------------------------------------------------------------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 // <tuple> 10 11 // template <class... Types> class tuple; 12 13 // template<class... Types> 14 // tuple<VTypes...> make_tuple(Types&&... t); 15 16 // UNSUPPORTED: c++98, c++03 17 18 #include <tuple> 19 #include <functional> 20 #include <cassert> 21 22 #include "test_macros.h" 23 24 int main() 25 { 26 { 27 int i = 0; 28 float j = 0; 29 std::tuple<int, int&, float&> t = std::make_tuple(1, std::ref(i), 30 std::ref(j)); 31 assert(std::get<0>(t) == 1); 32 assert(std::get<1>(t) == 0); 33 assert(std::get<2>(t) == 0); 34 i = 2; 35 j = 3.5; 36 assert(std::get<0>(t) == 1); 37 assert(std::get<1>(t) == 2); 38 assert(std::get<2>(t) == 3.5); 39 std::get<1>(t) = 0; 40 std::get<2>(t) = 0; 41 assert(i == 0); 42 assert(j == 0); 43 } 44 #if TEST_STD_VER > 11 45 { 46 constexpr auto t1 = std::make_tuple(0, 1, 3.14); 47 constexpr int i1 = std::get<1>(t1); 48 constexpr double d1 = std::get<2>(t1); 49 static_assert (i1 == 1, "" ); 50 static_assert (d1 == 3.14, "" ); 51 } 52 #endif 53 } 54