Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!ames!haven!purdue!gatech!psuvax1!news
From: schwartz@shire.cs.psu.edu (Scott Schwartz)
Newsgroups: comp.lang.pascal
Subject: Re: file windows (was Re: Standard Pascal)
Message-ID: <SCHWARTZ.89Jul24202811@shire.cs.psu.edu>
Date: 25 Jul 89 00:25:35 GMT
References: <8616@pyr.gatech.EDU> <18965@paris.ics.uci.edu>
	<SCHWARTZ.89Jul12023301@shire.cs.psu.edu> <4623@freja.diku.dk>
Sender: news@psuvax1.cs.psu.edu
Organization: Pennsylvania State University, computer science
Lines: 18

In article <4623@freja.diku.dk> Kristian Damm Jensen writes:

| >| >	while (input^ in [space, tab, newline, cr, formfeed]) do
| >| >		get (input)

| BTW it is the file-window that allows you to check eoln and eof. How do you 
| manage to check that, if you don't have some kind of look-ahead?

Well, actually the above should have been written as

	while (not eof (input)) and (input^ in [...]) do
		get (input)

since eof and eoln are "out of band" conditions that can't necessarily
be detected just by looking at input^.   

--
Scott Schwartz		<schwartz@shire.cs.psu.edu>