attempted fix for iterator_range relational operators bug

test/iterator_range_equality_bug.cpp

@@ -0,0 +1,39 @@
+// Boost.Range library
+//
+//  Copyright Neil Groves 2014. Use, modification and
+//  distribution is subject to the Boost Software License, Version
+//  1.0. (See accompanying file LICENSE_1_0.txt or copy at
+//  http://www.boost.org/LICENSE_1_0.txt)
+//
+//
+// For more information, see http://www.boost.org/libs/range/
+//
+// As reported in https://groups.google.com/forum/#!msg/boost-developers-archive/6JVNg7ZPb4k/RAlvPUec4MAJ
+
+#include <boost/range/iterator_range_core.hpp>
+#include <boost/lambda/lambda.hpp>
+#include <boost/algorithm/string.hpp>
+
+namespace boost
+{
+    enum {unnamed};
+    struct S { 
+        bool operator<(int) const {return false;}
+        bool operator==(int) const {return false;}
+    };
+    template<typename T>
+    bool foo(T i)
+    {
+        return i < unnamed || i == unnamed;
+    }
+}
+
+int main()
+{
+    using boost::lambda::_1;
+    (void)(_1 == 42);
+    (void)(42 == _1);
+
+    boost::foo(42);
+    boost::foo(boost::S());
+}