1 files changed, 39 insertions, 0 deletions
diff --git a/test/std/utilities/function.objects/comparisons/pointer_comparison_test_helper.hpp b/test/std/utilities/function.objects/comparisons/pointer_comparison_test_helper.hpp
new file mode 100644
index 000000000000..66d783a6e357
--- /dev/null
+++ b/test/std/utilities/function.objects/comparisons/pointer_comparison_test_helper.hpp
@@ -0,0 +1,39 @@
+#ifndef POINTER_COMPARISON_TEST_HELPER_HPP
+#define POINTER_COMPARISON_TEST_HELPER_HPP
+
+#include <vector>
+#include <memory>
+#include <cstdint>
+#include <cassert>
+
+#include "test_macros.h"
+
+template <class T, template<class> class CompareTemplate>
+void do_pointer_comparison_test() {
+    typedef CompareTemplate<T*> Compare;
+    typedef CompareTemplate<std::uintptr_t> UIntCompare;
+#if TEST_STD_VER > 11
+    typedef CompareTemplate<void> VoidCompare;
+#else
+    typedef Compare VoidCompare;
+#endif
+    std::vector<std::shared_ptr<T> > pointers;
+    const std::size_t test_size = 100;
+    for (int i=0; i < test_size; ++i)
+        pointers.push_back(std::shared_ptr<T>(new T()));
+    Compare comp;
+    UIntCompare ucomp;
+    VoidCompare vcomp;
+    for (int i=0; i < test_size; ++i) {
+        for (int j=0; j < test_size; ++j) {
+            T* lhs = pointers[i].get();
+            T* rhs = pointers[j].get();
+            std::uintptr_t lhs_uint = reinterpret_cast<std::uintptr_t>(lhs);
+            std::uintptr_t rhs_uint = reinterpret_cast<std::uintptr_t>(rhs);
+            assert(comp(lhs, rhs) == ucomp(lhs_uint, rhs_uint));
+            assert(vcomp(lhs, rhs) == ucomp(lhs_uint, rhs_uint));
+        }
+    }
+}
+
+#endif // POINTER_COMPARISON_TEST_HELPER_HPP