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From: bremner@cpsc.ucalgary.ca (David Bremner)
Newsgroups: comp.lang.smalltalk
Subject: Variable scoping in Smalltalk
Summary: Why can't I call temporaries whatever I want?
Keywords: possibly obscure, not to my knowledge in blue book
Message-ID: <935@cs-spool.calgary.UUCP>
Date: 22 Mar 89 00:05:25 GMT
Sender: news@calgary.UUCP
Reply-To: bremner@ksi.cpsc.ucalgary.ca.UUCP (David Bremner)
Distribution: comp
Organization: Knowledge Science Lab, U. of Calgary, Calgary, Canada.
Lines: 33

I am using ParcPlace Smalltalk-80 Version 2.3 on apollo domain SR10

Suppose I have the class declaration:

Object subclass: #Test
	instanceVariableNames: 'foo'
	classVariableNames: 'Bar'
	... "rest of keywords irrellevant"

then the following is a legal method
-----------------------
aMethod
	"testing smalltalk variable scoping"
	| Bar |
-----------------------

But the following is not
------------------------
aMethod
	"testing smalltalk variable scoping"
	| foo |
------------------------

generating the error 
| Name already defined -> foo |

What is going on here? Is this the way scoping is defined in the 
language? If so, where?


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