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(tuple&& u); 15 16 // UNSUPPORTED: c++98, c++03 17 18 #include <tuple> 19 #include <utility> 20 #include <cassert> 21 22 #include "MoveOnly.h" 23 24 struct ConstructsWithTupleLeaf 25 { ConstructsWithTupleLeafConstructsWithTupleLeaf26 ConstructsWithTupleLeaf() {} 27 ConstructsWithTupleLeafConstructsWithTupleLeaf28 ConstructsWithTupleLeaf(ConstructsWithTupleLeaf const &) { assert(false); } ConstructsWithTupleLeafConstructsWithTupleLeaf29 ConstructsWithTupleLeaf(ConstructsWithTupleLeaf &&) {} 30 31 template <class T> ConstructsWithTupleLeafConstructsWithTupleLeaf32 ConstructsWithTupleLeaf(T t) 33 { assert(false); } 34 }; 35 main()36int main() 37 { 38 { 39 typedef std::tuple<> T; 40 T t0; 41 T t = std::move(t0); 42 ((void)t); // Prevent unused warning 43 } 44 { 45 typedef std::tuple<MoveOnly> T; 46 T t0(MoveOnly(0)); 47 T t = std::move(t0); 48 assert(std::get<0>(t) == 0); 49 } 50 { 51 typedef std::tuple<MoveOnly, MoveOnly> T; 52 T t0(MoveOnly(0), MoveOnly(1)); 53 T t = std::move(t0); 54 assert(std::get<0>(t) == 0); 55 assert(std::get<1>(t) == 1); 56 } 57 { 58 typedef std::tuple<MoveOnly, MoveOnly, MoveOnly> T; 59 T t0(MoveOnly(0), MoveOnly(1), MoveOnly(2)); 60 T t = std::move(t0); 61 assert(std::get<0>(t) == 0); 62 assert(std::get<1>(t) == 1); 63 assert(std::get<2>(t) == 2); 64 } 65 // A bug in tuple caused __tuple_leaf to use its explicit converting constructor 66 // as its move constructor. This tests that ConstructsWithTupleLeaf is not called 67 // (w/ __tuple_leaf) 68 { 69 typedef std::tuple<ConstructsWithTupleLeaf> d_t; 70 d_t d((ConstructsWithTupleLeaf())); 71 d_t d2(static_cast<d_t &&>(d)); 72 } 73 } 74