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Path: utzoo!utgpu!water!watmath!watcgl!kdmoen
From: kdmoen@watcgl.UUCP
Newsgroups: comp.lang.c
Subject: Re: Distinguished pointers (was Re: Weird syscall returns)
Message-ID: <1547@watcgl.waterloo.edu>
Date: Wed, 5-Aug-87 10:55:11 EDT
Article-I.D.: watcgl.1547
Posted: Wed Aug  5 10:55:11 1987
Date-Received: Fri, 7-Aug-87 05:42:52 EDT
References: <1158@copper.TEK.COM> <6858@auspyr.UUCP> <17171@cca.CCA.COM> <6129@brl-smoke.ARPA> <274@nuchat.UUCP>
Reply-To: kdmoen@watcgl.waterloo.edu (Doug Moen)
Organization: U. of Waterloo, Ontario
Lines: 35

In article <274@nuchat.UUCP> steve@nuchat.UUCP (Steve Nuchia) writes:
>	switch ( getchar() )
>	{
>	......
>	case '\n':
>	case '\r':
>		common code for the "enter" morpheme
>	......
>	}

>Now we find ourselves on OS9, where the compiler says that '\n' and
>'\r' are both 13.  (They thoughtfully provide '\l' == 11).  Now the
>switch doesn't work, even though all it needs is to be collapsed.

>To "fix" the problem we have to make the code not reverse portable -
>we have to break it to get it to work.  I'm not sure I want to require
>the compiler to recognise and allow (warning?) the special case of
>stacked identical case values, put it might be worth looking into.

This isn't pretty, but it solves your problem:
	switch ( getchar() )
	{
	......
	case '\n':
#if '\r' != '\n'
	case '\r':
#endif
		common code for the "enter" morpheme
	......
	}
-- 
Doug Moen
University of Waterloo Computer Graphics Lab
UUCP:     {ihnp4,watmath}!watcgl!kdmoen
INTERNET: kdmoen@cgl.waterloo.edu