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 // tuple(const tuple& u) = default; 14 15 // UNSUPPORTED: c++98, c++03 16 17 #include <tuple> 18 #include <string> 19 #include <cassert> 20 21 #include "test_macros.h" 22 23 struct Empty {}; 24 25 int main(int, char**) 26 { 27 { 28 typedef std::tuple<> T; 29 T t0; 30 T t = t0; 31 ((void)t); // Prevent unused warning 32 } 33 { 34 typedef std::tuple<int> T; 35 T t0(2); 36 T t = t0; 37 assert(std::get<0>(t) == 2); 38 } 39 { 40 typedef std::tuple<int, char> T; 41 T t0(2, 'a'); 42 T t = t0; 43 assert(std::get<0>(t) == 2); 44 assert(std::get<1>(t) == 'a'); 45 } 46 { 47 typedef std::tuple<int, char, std::string> T; 48 const T t0(2, 'a', "some text"); 49 T t = t0; 50 assert(std::get<0>(t) == 2); 51 assert(std::get<1>(t) == 'a'); 52 assert(std::get<2>(t) == "some text"); 53 } 54 #if TEST_STD_VER > 11 55 { 56 typedef std::tuple<int> T; 57 constexpr T t0(2); 58 constexpr T t = t0; 59 static_assert(std::get<0>(t) == 2, ""); 60 } 61 { 62 typedef std::tuple<Empty> T; 63 constexpr T t0; 64 constexpr T t = t0; 65 constexpr Empty e = std::get<0>(t); 66 ((void)e); // Prevent unused warning 67 } 68 #endif 69 70 return 0; 71 } 72