piecewise.pass.cpp (1065B)
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 // UNSUPPORTED: c++98, c++03 11 12 // <utility> 13 14 // template <class T1, class T2> struct pair 15 16 // template <class... Args1, class... Args2> 17 // pair(piecewise_construct_t, tuple<Args1...> first_args, 18 // tuple<Args2...> second_args); 19 20 #include <cassert> 21 #include <tuple> 22 #include <utility> 23 24 25 int main() 26 { 27 { 28 typedef std::pair<int, int*> P1; 29 typedef std::pair<int*, int> P2; 30 typedef std::pair<P1, P2> P3; 31 P3 p3(std::piecewise_construct, std::tuple<int, int*>(3, nullptr), 32 std::tuple<int*, int>(nullptr, 4)); 33 assert(p3.first == P1(3, nullptr)); 34 assert(p3.second == P2(nullptr, 4)); 35 } 36 }