1 files changed, 78 insertions, 0 deletions
diff --git a/test/std/utilities/memory/specialized.algorithms/specialized.destroy/destroy_at.pass.cpp b/test/std/utilities/memory/specialized.algorithms/specialized.destroy/destroy_at.pass.cpp
new file mode 100644
index 000000000000..4e67b1eceb57
--- /dev/null
+++ b/test/std/utilities/memory/specialized.algorithms/specialized.destroy/destroy_at.pass.cpp
@@ -0,0 +1,78 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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.
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: c++98, c++03, c++11, c++14
+
+// <memory>
+
+// template <class _Tp>
+// void destroy_at(_Tp*);
+
+#include <memory>
+#include <cstdlib>
+#include <cassert>
+
+struct Counted {
+  static int count;
+  static void reset() { count = 0; }
+  Counted() { ++count; }
+  Counted(Counted const&) { ++count; }
+  ~Counted() { --count; }
+  friend void operator&(Counted) = delete;
+};
+int Counted::count = 0;
+
+struct VCounted {
+  static int count;
+  static void reset() { count = 0; }
+  VCounted() { ++count; }
+  VCounted(VCounted const&) { ++count; }
+  virtual ~VCounted() { --count; }
+  friend void operator&(VCounted) = delete;
+};
+int VCounted::count = 0;
+
+struct DCounted : VCounted {
+    friend void operator&(DCounted) = delete;
+};
+
+int main()
+{
+    {
+    void* mem1 = std::malloc(sizeof(Counted));
+    void* mem2 = std::malloc(sizeof(Counted));
+    assert(mem1 && mem2);
+    assert(Counted::count == 0);
+    Counted* ptr1 = ::new(mem1) Counted();
+    Counted* ptr2 = ::new(mem2) Counted();
+    assert(Counted::count == 2);
+    std::destroy_at(ptr1);
+    assert(Counted::count == 1);
+    std::destroy_at(ptr2);
+    assert(Counted::count == 0);
+    std::free(mem1);
+    std::free(mem2);
+    }
+    {
+    void* mem1 = std::malloc(sizeof(DCounted));
+    void* mem2 = std::malloc(sizeof(DCounted));
+    assert(mem1 && mem2);
+    assert(DCounted::count == 0);
+    DCounted* ptr1 = ::new(mem1) DCounted();
+    DCounted* ptr2 = ::new(mem2) DCounted();
+    assert(DCounted::count == 2);
+    assert(VCounted::count == 2);
+    std::destroy_at(ptr1);
+    assert(VCounted::count == 1);
+    std::destroy_at(ptr2);
+    assert(VCounted::count == 0);
+    std::free(mem1);
+    std::free(mem2);
+    }
+}