1 files changed, 27 insertions, 0 deletions
diff --git a/libcxx/test/containers/test_compare.h b/libcxx/test/containers/test_compare.h
new file mode 100644
index 00000000000..7153a4cb801
--- /dev/null
+++ b/libcxx/test/containers/test_compare.h
@@ -0,0 +1,27 @@
+#ifndef TEST_COMPARE_H
+#define TEST_COMPARE_H
+
+#include <cstddef>
+#include <type_traits>
+#include <cstdlib>
+#include <new>
+#include <climits>
+
+template <class C>
+class test_compare
+    : private C
+{
+    int data_;
+public:
+    explicit test_compare(int data = 0) : data_(data) {}
+
+    typename C::result_type
+    operator()(typename std::add_lvalue_reference<const typename C::first_argument_type>::type x,
+               typename std::add_lvalue_reference<const typename C::second_argument_type>::type y) const
+        {return C::operator()(x, y);}
+
+    bool operator==(const test_compare& c) const
+        {return data_ == c.data_;}
+};
+
+#endif