I find FOREACH very useful. I did find one anomaly. Compiling on MAC OS (Panther) using gcc version 3.3 20030304 (Apple Computer, Inc. build 1671), I had to add the following lines in order to get things to compile. I didn't investigate why it worked, but there you have it. # define BOOST_FOREACH_NO_RVALUE_DETECTION # define BOOST_FOREACH_NO_CONST_RVALUE_DETECTION