1 //===----------------------------------------------------------------------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is dual licensed under the MIT and the University of Illinois Open 6 // Source Licenses. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 // <tuple> 11 12 // template <class... Types> class tuple; 13 14 // tuple(const tuple& u) = default; 15 16 // UNSUPPORTED: c++98, c++03 17 18 #include <tuple> 19 #include <string> 20 #include <cassert> 21 22 struct Empty {}; 23 24 int main() 25 { 26 { 27 typedef std::tuple<> T; 28 T t0; 29 T t = t0; 30 ((void)t); // Prevent unused warning 31 } 32 { 33 typedef std::tuple<int> T; 34 T t0(2); 35 T t = t0; 36 assert(std::get<0>(t) == 2); 37 } 38 { 39 typedef std::tuple<int, char> T; 40 T t0(2, 'a'); 41 T t = t0; 42 assert(std::get<0>(t) == 2); 43 assert(std::get<1>(t) == 'a'); 44 } 45 { 46 typedef std::tuple<int, char, std::string> T; 47 const T t0(2, 'a', "some text"); 48 T t = t0; 49 assert(std::get<0>(t) == 2); 50 assert(std::get<1>(t) == 'a'); 51 assert(std::get<2>(t) == "some text"); 52 } 53 #if _LIBCPP_STD_VER > 11 54 { 55 typedef std::tuple<int> T; 56 constexpr T t0(2); 57 constexpr T t = t0; 58 static_assert(std::get<0>(t) == 2, ""); 59 } 60 { 61 typedef std::tuple<Empty> T; 62 constexpr T t0; 63 constexpr T t = t0; 64 constexpr Empty e = std::get<0>(t); 65 ((void)e); // Prevent unused warning 66 } 67 #endif 68 } 69
