Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!rutgers!cmcl2!acf5!sabbagh
From: sabbagh@acf5.NYU.EDU (sabbagh)
Newsgroups: comp.lang.smalltalk
Subject: Re: Smalltalk Implementation Summary
Message-ID: <954@acf5.NYU.EDU>
Date: 8 Dec 89 16:46:10 GMT
References: <1989Dec6.235311.12726@comp.vuw.ac.nz>
Reply-To: sabbagh@acf5.UUCP ()
Organization: New York University
Lines: 27

In article <1989Dec6.235311.12726@comp.vuw.ac.nz> kjx@comp.vuw.ac.nz (R James Noble) writes:
>
>I have received several responses to my posting regarding Smalltalk
>implementation. Thanks to all who replied. The general consensus was
>as follows:-
> [stuff deleted]
>b) Blocks should be fully reentrant, and allow block temporaries.
>Syntax: [ :a1 :a2 | t1 t2 | ... ]

Also, blocks must carry around the environment in which they are
defined. Consider

aMethod: arg
 ^[ : aBlockArg | aBlockArg foo: arg].

which is entirely legal in Smalltalk.  Blocks may also refer to 
temporary variables delcared in the method.


Hadil G. Sabbagh
E-mail:		sabbagh@csd27.nyu.edu
Voice:		(212) 998-3125
Snail:		Courant Institute of Math. Sci.
		251 Mercer St.
		New York,NY 10012

186,282 miles per second -- it's not just a good idea, it's the law!