Macro names imbedded in pp-numbers [repost]

[Doug Gwyn]

In article <15217 at haddock.ima.isc.com> karl at haddock.ima.isc.com (Karl Heuer) writes:
-We are now in the realm of undefined behavior.  An ANSI-conforming compiler is
-required to issue a diagnostic, but is then permitted to guess what the user
-meant and continue processing the program.  In particular, it should be legal
-for it to consider "getchar" for macro replacement.

That's a useful point that has application in other areas as well.