Hi Paul, > I also have some qualms about C macros that expand to series of tokens > with unbalanced braces.
The approach has the big advantage that you can step through the code in a debugger, and that the entire block expands into a single statement. (The original approach from gdb-7.2/gdb/exceptions.h has no unbalanced braces, but the expansion is 2 statements, not 1 statement.) Actually the unbalanced braces have the advantage that you immediately get a syntax error if you forget the DONE_MSVC_INVAL token at the end. It happened to me already. Bruno -- In memoriam James A. Garfield <http://en.wikipedia.org/wiki/James_A._Garfield>
