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 #include <tuple> 17 #include <utility> 18 #include <cassert> 19 20 #include "MoveOnly.h" 21 22 struct ConstructsWithTupleLeaf 23 { 24 ConstructsWithTupleLeaf() {} 25 26 ConstructsWithTupleLeaf(ConstructsWithTupleLeaf const &) { assert(false); } 27 ConstructsWithTupleLeaf(ConstructsWithTupleLeaf &&) {} 28 29 template <class T> 30 ConstructsWithTupleLeaf(T t) 31 { assert(false); } 32 }; 33 34 int main() 35 { 36 { 37 typedef std::tuple<> T; 38 T t0; 39 T t = std::move(t0); 40 ((void)t); // Prevent unused warning 41 } 42 { 43 typedef std::tuple<MoveOnly> T; 44 T t0(MoveOnly(0)); 45 T t = std::move(t0); 46 assert(std::get<0>(t) == 0); 47 } 48 { 49 typedef std::tuple<MoveOnly, MoveOnly> T; 50 T t0(MoveOnly(0), MoveOnly(1)); 51 T t = std::move(t0); 52 assert(std::get<0>(t) == 0); 53 assert(std::get<1>(t) == 1); 54 } 55 { 56 typedef std::tuple<MoveOnly, MoveOnly, MoveOnly> T; 57 T t0(MoveOnly(0), MoveOnly(1), MoveOnly(2)); 58 T t = std::move(t0); 59 assert(std::get<0>(t) == 0); 60 assert(std::get<1>(t) == 1); 61 assert(std::get<2>(t) == 2); 62 } 63 // A bug in tuple caused __tuple_leaf to use its explicit converting constructor 64 // as its move constructor. This tests that ConstructsWithTupleLeaf is not called 65 // (w/ __tuple_leaf) 66 { 67 typedef std::tuple<ConstructsWithTupleLeaf> d_t; 68 d_t d((ConstructsWithTupleLeaf())); 69 d_t d2(static_cast<d_t &&>(d)); 70 } 71 } 72