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 // <utility> 11 12 // template <class T1, class T2> struct pair 13 14 // template <class... Args1, class... Args2> 15 // pair(piecewise_construct_t, tuple<Args1...> first_args, 16 // tuple<Args2...> second_args); 17 18 #include <utility> 19 #include <tuple> 20 #include <cassert> 21 22 int main() 23 { 24 #ifndef _LIBCPP_HAS_NO_VARIADICS 25 { 26 typedef std::pair<int, int*> P1; 27 typedef std::pair<int*, int> P2; 28 typedef std::pair<P1, P2> P3; 29 P3 p3(std::piecewise_construct, std::tuple<int, int*>(3, nullptr), 30 std::tuple<int*, int>(nullptr, 4)); 31 assert(p3.first == P1(3, nullptr)); 32 assert(p3.second == P2(nullptr, 4)); 33 } 34 #endif // _LIBCPP_HAS_NO_VARIADICS 35 } 36
