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 // template <class U1, class U2> tuple(pair<U1, U2>&& u); 14 15 // UNSUPPORTED: c++98, c++03 16 17 #include <tuple> 18 #include <utility> 19 #include <memory> 20 #include <cassert> 21 22 struct B 23 { 24 int id_; 25 26 explicit B(int i) : id_(i) {} 27 28 virtual ~B() {} 29 }; 30 31 struct D 32 : B 33 { 34 explicit D(int i) : B(i) {} 35 }; 36 37 int main() 38 { 39 { 40 typedef std::pair<long, std::unique_ptr<D>> T0; 41 typedef std::tuple<long long, std::unique_ptr<B>> T1; 42 T0 t0(2, std::unique_ptr<D>(new D(3))); 43 T1 t1 = std::move(t0); 44 assert(std::get<0>(t1) == 2); 45 assert(std::get<1>(t1)->id_ == 3); 46 } 47 } 48