diff options
Diffstat (limited to 'test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.assign/shared_ptr_Y.pass.cpp')
-rw-r--r-- | test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.assign/shared_ptr_Y.pass.cpp | 121 |
1 files changed, 121 insertions, 0 deletions
diff --git a/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.assign/shared_ptr_Y.pass.cpp b/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.assign/shared_ptr_Y.pass.cpp new file mode 100644 index 000000000000..abd3d378eb71 --- /dev/null +++ b/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.assign/shared_ptr_Y.pass.cpp @@ -0,0 +1,121 @@ +//===----------------------------------------------------------------------===// +// +// The LLVM Compiler Infrastructure +// +// This file is dual licensed under the MIT and the University of Illinois Open +// Source Licenses. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// + +// <memory> + +// shared_ptr + +// template<class Y> shared_ptr& operator=(const shared_ptr<Y>& r); + +#include <memory> +#include <type_traits> +#include <cassert> + +struct B +{ + static int count; + + B() {++count;} + B(const B&) {++count;} + virtual ~B() {--count;} +}; + +int B::count = 0; + +struct A + : public B +{ + static int count; + + A() {++count;} + A(const A&) {++count;} + ~A() {--count;} +}; + +int A::count = 0; + +int main() +{ + { + const std::shared_ptr<A> pA(new A); + A* ptrA = pA.get(); + { + std::shared_ptr<B> pB(new B); + pB = pA; + assert(B::count == 1); + assert(A::count == 1); + assert(pB.use_count() == 2); + assert(pA.use_count() == 2); + assert(pA.get() == pB.get()); + assert(pB.get() == ptrA); + } + assert(pA.use_count() == 1); + assert(B::count == 1); + assert(A::count == 1); + } + assert(B::count == 0); + assert(A::count == 0); + { + const std::shared_ptr<A> pA; + A* ptrA = pA.get(); + { + std::shared_ptr<B> pB(new B); + pB = pA; + assert(B::count == 0); + assert(A::count == 0); + assert(pB.use_count() == 0); + assert(pA.use_count() == 0); + assert(pA.get() == pB.get()); + assert(pB.get() == ptrA); + } + assert(pA.use_count() == 0); + assert(B::count == 0); + assert(A::count == 0); + } + assert(B::count == 0); + assert(A::count == 0); + { + const std::shared_ptr<A> pA(new A); + A* ptrA = pA.get(); + { + std::shared_ptr<B> pB; + pB = pA; + assert(B::count == 1); + assert(A::count == 1); + assert(pB.use_count() == 2); + assert(pA.use_count() == 2); + assert(pA.get() == pB.get()); + assert(pB.get() == ptrA); + } + assert(pA.use_count() == 1); + assert(B::count == 1); + assert(A::count == 1); + } + assert(B::count == 0); + assert(A::count == 0); + { + const std::shared_ptr<A> pA; + A* ptrA = pA.get(); + { + std::shared_ptr<B> pB; + pB = pA; + assert(B::count == 0); + assert(A::count == 0); + assert(pB.use_count() == 0); + assert(pA.use_count() == 0); + assert(pA.get() == pB.get()); + assert(pB.get() == ptrA); + } + assert(pA.use_count() == 0); + assert(B::count == 0); + assert(A::count == 0); + } + assert(B::count == 0); + assert(A::count == 0); +} |