1 files changed, 97 insertions, 0 deletions
diff --git a/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.const/shared_ptr_Y.pass.cpp b/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.const/shared_ptr_Y.pass.cpp
new file mode 100644
index 000000000000..8b5ffdc1475b
--- /dev/null
+++ b/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.const/shared_ptr_Y.pass.cpp
@@ -0,0 +1,97 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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(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;
+
+struct C
+{
+    static int count;
+
+    C() {++count;}
+    C(const C&) {++count;}
+    virtual ~C() {--count;}
+};
+
+int C::count = 0;
+
+int main()
+{
+    static_assert(( std::is_convertible<std::shared_ptr<A>, std::shared_ptr<B> >::value), "");
+    static_assert((!std::is_convertible<std::shared_ptr<B>, std::shared_ptr<A> >::value), "");
+    static_assert((!std::is_convertible<std::shared_ptr<A>, std::shared_ptr<C> >::value), "");
+    {
+        const std::shared_ptr<A> pA(new A);
+        assert(pA.use_count() == 1);
+        assert(B::count == 1);
+        assert(A::count == 1);
+        {
+            std::shared_ptr<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(pA.use_count() == 1);
+        assert(B::count == 1);
+        assert(A::count == 1);
+    }
+    assert(B::count == 0);
+    assert(A::count == 0);
+    {
+        std::shared_ptr<A> pA;
+        assert(pA.use_count() == 0);
+        assert(B::count == 0);
+        assert(A::count == 0);
+        {
+            std::shared_ptr<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(pA.use_count() == 0);
+        assert(B::count == 0);
+        assert(A::count == 0);
+    }
+    assert(B::count == 0);
+    assert(A::count == 0);
+}