1 files changed, 63 insertions, 0 deletions
diff --git a/cpp/include/Ice/Comparable.h b/cpp/include/Ice/Comparable.h
new file mode 100644
index 00000000000..7becd593401
--- /dev/null
+++ b/cpp/include/Ice/Comparable.h
@@ -0,0 +1,63 @@
+// **********************************************************************
+//
+// Copyright (c) 2003-2015 ZeroC, Inc. All rights reserved.
+//
+// This copy of Ice is licensed to you under the terms described in the
+// ICE_LICENSE file included in this distribution.
+//
+// **********************************************************************
+
+#ifndef ICE_COMPARABLE_H
+#define ICE_COMPARABLE_H
+
+namespace Ice
+{
+
+template<typename T, typename U>
+inline bool targetEquals(const T& lhs, const U& rhs)
+{
+    if(lhs && rhs)
+    {
+        return *lhs == *rhs;
+    }
+    else
+    {
+        return !lhs && !rhs;
+    }
+}
+
+template<typename T>
+struct TargetEquals
+{
+    bool operator()(const T& lhs, const T& rhs) const
+    {
+        return targetEquals(lhs, rhs);
+    }
+};
+
+
+template<typename T, typename U>
+inline bool targetLess(const T& lhs, const U& rhs)
+{
+    if(lhs && rhs)
+    {
+        return *lhs < *rhs;
+    }
+    else
+    {
+        return !lhs && rhs;
+    }
+}
+
+template<typename T>
+struct TargetLess
+{
+    bool operator()(const T& lhs, const T& rhs) const
+    {
+        return targetLess(lhs, rhs);
+    }
+};
+
+}
+
+#endif