------- Comment #2 from h dot b dot furuseth at usit dot uio dot no 2008-11-17 20:15 ------- Subject: Re: [4.4 regression] #elif <non-const expression #defined in this #if> breaks
Yes, I should have read the #36320 text more carefully. I merely noticed that its empty #elif cannot expand to anything correct, while my example can (and does in the real-life case which produced it). I thought C99 6.10p7 was what saved it: The preprocessing tokens within a preprocessing directive are not subject to macro expansion unless otherwise stated. but maybe not. 6.10.1p3 doesn't say anything about some #elif branches not being evaluated:-( Hopefully that's just overly standard-lawerly though. Maybe comp.std.c would have been a better place to ask. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38161
