Xref: utzoo comp.lang.c:27727 comp.std.c:2762
Path: utzoo!utgpu!watserv1!watdragon!lion!ccplumb
From: ccplumb@lion.waterloo.edu (Colin Plumb)
Newsgroups: comp.lang.c,comp.std.c
Subject: Re: loops in general
Summary: exit-in-the-middle syntax.
Keywords: loops
Message-ID: <23094@watdragon.waterloo.edu>
Date: 10 Apr 90 14:52:24 GMT
References: <1565@amethyst.math.arizona.edu>
Sender: daemon@watdragon.waterloo.edu
Organization: University of Waterloo
Lines: 29

Actually, C already has a loop syntax that could be extended to
exit-in-the-middle loops.  It would be fun to hack this into GCC.  I
presume the standard would require its usual one diagnostic about the
use of extensions and then be silent on the issue.

Anyway, C currently has

while (expr) stmt
and
do stmt while (expr);

However, ';' is a legal statement, so how about treating these as
special cases of

[do stmt] while (expr) stmt

So I could write a loop like

do 
	c = getchar();
while (c != EOF || !feof(stdin)) {
	<rest of loop>
}

Perl's continue blocks are also nifty, but I don't know of a really
elegant way to add them, and goto cont; ... ; continue: ...; works
just as well.
-- 
	-Colin