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 // explicit tuple(const T&...); 15 16 #include <tuple> 17 #include <string> 18 #include <cassert> 19 20 int main() 21 { 22 { 23 std::tuple<int> t(2); 24 assert(std::get<0>(t) == 2); 25 } 26 #if _LIBCPP_STD_VER > 11 27 { 28 constexpr std::tuple<int> t(2); 29 static_assert(std::get<0>(t) == 2, ""); 30 } 31 { 32 constexpr std::tuple<int> t; 33 static_assert(std::get<0>(t) == 0, ""); 34 } 35 #endif 36 { 37 std::tuple<int, char*> t(2, 0); 38 assert(std::get<0>(t) == 2); 39 assert(std::get<1>(t) == nullptr); 40 } 41 #if _LIBCPP_STD_VER > 11 42 { 43 constexpr std::tuple<int, char*> t(2, nullptr); 44 static_assert(std::get<0>(t) == 2, ""); 45 static_assert(std::get<1>(t) == nullptr, ""); 46 } 47 #endif 48 { 49 std::tuple<int, char*> t(2, nullptr); 50 assert(std::get<0>(t) == 2); 51 assert(std::get<1>(t) == nullptr); 52 } 53 { 54 std::tuple<int, char*, std::string> t(2, nullptr, "text"); 55 assert(std::get<0>(t) == 2); 56 assert(std::get<1>(t) == nullptr); 57 assert(std::get<2>(t) == "text"); 58 } 59 // extensions 60 { 61 std::tuple<int, char*, std::string> t(2); 62 assert(std::get<0>(t) == 2); 63 assert(std::get<1>(t) == nullptr); 64 assert(std::get<2>(t) == ""); 65 } 66 { 67 std::tuple<int, char*, std::string> t(2, nullptr); 68 assert(std::get<0>(t) == 2); 69 assert(std::get<1>(t) == nullptr); 70 assert(std::get<2>(t) == ""); 71 } 72 { 73 std::tuple<int, char*, std::string, double> t(2, nullptr, "text"); 74 assert(std::get<0>(t) == 2); 75 assert(std::get<1>(t) == nullptr); 76 assert(std::get<2>(t) == "text"); 77 assert(std::get<3>(t) == 0.0); 78 } 79 } 80