Path: utzoo!utgpu!news-server.csri.toronto.edu!eecg.toronto.edu!drb
Newsgroups: comp.sys.sgi
From: drb@eecg.toronto.edu (David R. Blythe)
Subject: C compiler weirdness?
Message-ID: <1991Apr8.023545.11197@jarvis.csri.toronto.edu>
Organization: EECG, University of Toronto
Distribution: comp.sys.sgi
Date: 8 Apr 91 06:35:46 GMT
Lines: 13

I recently dug up a copy of the hoc calculator described in kernighan & pike
only to discover that the C compiler does not increment pc until after the
function call returns in the following statment:
                  (*(*pc++))();
whereas the rest of the program is assuming it is done before the function is
actually called.  Is the compiler interpretation supposed to be implementation
dependent?  I would suspect not, but then I can't believe no one else has
run into this before (On the other hand K&P is pre-ANSI).  Sorry, if this has
been hashed out before.  And for those keeping score this is IRIX 3.3.1

	david blythe
	ontario centre for large scale computation
	drb@clsc.utoronto.ca