Path: utzoo!mnetor!uunet!lll-winken!lll-lcc!ames!amdahl!dlb!megatest!djones
From: djones@megatest.UUCP (Dave Jones)
Newsgroups: comp.lang.pascal
Subject: Re: Pascal Enumerated I/O
Message-ID: <283@goofy.megatest.UUCP>
Date: 23 Feb 88 23:19:42 GMT
References: <1077@csuna.UUCP>
Organization: Megatest Corporation, San Jose, Ca
Lines: 37

in article <1077@csuna.UUCP>, abcscnuk@csuna.UUCP (Naoto Kimura) says:
> 
> In article <673@cresswell.quintus.UUCP> ok@quintus.UUCP (Richard A. O'Keefe) writes:
>>..
>>In article <11903@brl-adm.ARPA>, jipping@frodo.cs.hope.EDU (Mike Jipping) writes:
>>> It seems to me that doing I/O on enumerated types goes against the grain
>>> of the concept.
   
  [ Stuff about concepts and philosophy omited. ]

> 
> Pascal allows only output, not input of booleans.  What would you
> suggest for input of boolean variables ?  Are you going to have the
> compiler generated code to require 'TRUE' for TRUE on text input?

  [ Lots of strident rhetorical questions omited. ]

The Sun compiler "pc", and the Berkeley "pc" and "pi" on which it is based 
purportedly allow for both reading and writing enumerated types, including 
boolean.  You will get a warning, saying that the feature is non-standard ,
if you don't use the -w flag.  The canonical spelling for reading *true* is 
"true" and the canonical spelling for reading *false* is "false".

But don't expect it really to work.  It's buggy.


		Dave Jones
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