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 // test move 11 12 #include <utility> 13 #include <cassert> 14 15 int copy_ctor = 0; 16 int move_ctor = 0; 17 18 class A 19 { 20 #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 21 #else 22 #endif 23 24 public: 25 26 #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 27 A(const A&) {++copy_ctor;} 28 A& operator=(const A&); 29 30 A(A&&) {++move_ctor;} 31 A& operator=(A&&); 32 #else // _LIBCPP_HAS_NO_RVALUE_REFERENCES 33 A(const A&) {++copy_ctor;} 34 A& operator=(A&); 35 36 operator std::__rv<A> () {return std::__rv<A>(*this);} 37 A(std::__rv<A>) {++move_ctor;} 38 #endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES 39 40 A() {} 41 }; 42 43 A source() {return A();} 44 const A csource() {return A();} 45 46 void test(A) {} 47 48 int main() 49 { 50 A a; 51 const A ca = A(); 52 53 assert(copy_ctor == 0); 54 assert(move_ctor == 0); 55 56 A a2 = a; 57 assert(copy_ctor == 1); 58 assert(move_ctor == 0); 59 60 A a3 = std::move(a); 61 assert(copy_ctor == 1); 62 assert(move_ctor == 1); 63 64 A a4 = ca; 65 assert(copy_ctor == 2); 66 assert(move_ctor == 1); 67 68 A a5 = std::move(ca); 69 assert(copy_ctor == 3); 70 assert(move_ctor == 1); 71 } 72
