shared_ptr_rv.pass.cpp revision bc8d3f97eb5c958007f2713238472e0c1c8fe02c
1//===----------------------------------------------------------------------===// 2// 3// ��������������������The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9 10// <memory> 11 12// shared_ptr 13 14// shared_ptr(shared_ptr&& r); 15 16#include <memory> 17#include <cassert> 18 19struct A 20{ 21 static int count; 22 23 A() {++count;} 24 A(const A&) {++count;} 25 ~A() {--count;} 26}; 27 28int A::count = 0; 29 30int main() 31{ 32 { 33 std::shared_ptr<A> pA(new A); 34 assert(pA.use_count() == 1); 35 assert(A::count == 1); 36 { 37 A* p = pA.get(); 38 std::shared_ptr<A> pA2(std::move(pA)); 39 assert(A::count == 1); 40#ifdef _LIBCPP_MOVE 41 assert(pA.use_count() == 0); 42 assert(pA2.use_count() == 1); 43#else 44 assert(pA.use_count() == 2); 45 assert(pA2.use_count() == 2); 46#endif 47 assert(pA2.get() == p); 48 } 49#ifdef _LIBCPP_MOVE 50 assert(pA.use_count() == 0); 51 assert(A::count == 0); 52#else 53 assert(pA.use_count() == 1); 54 assert(A::count == 1); 55#endif 56 } 57 assert(A::count == 0); 58 { 59 std::shared_ptr<A> pA; 60 assert(pA.use_count() == 0); 61 assert(A::count == 0); 62 { 63 std::shared_ptr<A> pA2(std::move(pA)); 64 assert(A::count == 0); 65 assert(pA.use_count() == 0); 66 assert(pA2.use_count() == 0); 67 assert(pA2.get() == pA.get()); 68 } 69 assert(pA.use_count() == 0); 70 assert(A::count == 0); 71 } 72 assert(A::count == 0); 73} 74