1 files changed, 52 insertions, 0 deletions
diff --git a/libcxx/test/support/Counter.h b/libcxx/test/support/Counter.h
new file mode 100644
index 00000000000..2bc3642f505
--- /dev/null
+++ b/libcxx/test/support/Counter.h
@@ -0,0 +1,52 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef COUNTER_H
+#define COUNTER_H
+
+#include <functional> // for std::hash
+
+struct Counter_base { static int gConstructed; };
+    
+template <typename T>
+class Counter : public Counter_base
+{
+public:
+    Counter() : data_()                             { ++gConstructed; }
+    Counter(const T &data) : data_(data)            { ++gConstructed; }
+    Counter(const Counter& rhs) : data_(rhs.data_)  { ++gConstructed; }
+    Counter& operator=(const Counter& rhs)          { ++gConstructed; data_ = rhs.data_; return *this; }
+#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
+    Counter(Counter&& rhs) : data_(std::move(rhs.data_))  { ++gConstructed; }
+    Counter& operator=(Counter&& rhs) { ++gConstructed; data_ = std::move(rhs.data_); return *this; }
+#endif
+    ~Counter() { --gConstructed; }
+    
+    const T& get() const {return data_;}
+
+    bool operator==(const Counter& x) const {return data_ == x.data_;}
+    bool operator< (const Counter& x) const {return data_ <  x.data_;}
+
+private:
+    T data_;
+};
+
+int Counter_base::gConstructed = 0;
+
+namespace std {
+
+template <class T>
+struct hash<Counter<T> >
+    : public std::unary_function<Counter<T>, std::size_t>
+{
+    std::size_t operator()(const Counter<T>& x) const {return std::hash<T>(x.get());}
+};
+}
+
+#endif