Index: operators.hpp
===================================================================
RCS file: /cvsroot/boost/boost/boost/operators.hpp,v
retrieving revision 1.17
diff -u -r1.17 operators.hpp
--- operators.hpp	23 May 2003 23:09:21 -0000	1.17
+++ operators.hpp	29 Jul 2003 22:11:10 -0000
@@ -80,6 +80,7 @@
 #include <boost/config.hpp>
 #include <boost/iterator.hpp>
 #include <boost/preprocessor/seq/cat.hpp>
+#include <boost/detail/workaround.hpp>
 
 #if defined(__sgi) && !defined(__GNUC__)
 #   pragma set woff 1234
@@ -155,7 +156,11 @@
 };
 
 // A macro which produces "name_2left" from "name".
+#if BOOST_WORKAROUND(__IBMCPP__, <= 600)
+#define BOOST_OPERATOR2_LEFT(name) name##2_left
+#else
 #define BOOST_OPERATOR2_LEFT(name) BOOST_PP_SEQ_CAT_S(1,(name)(2)(_)(left))
+#endif
 
 //  NRVO-friendly implementation (contributed by Daniel Frey) ---------------//