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From: johnson@p.cs.uiuc.edu
Newsgroups: comp.lang.smalltalk
Subject: Re: Cascades and Little Smalltalk
Message-ID: <80500083@p.cs.uiuc.edu>
Date: 17 Dec 89 03:39:00 GMT
References: <14395@orstcs.CS.ORST.EDU>
Lines: 19
Nf-ID: #R:orstcs.CS.ORST.EDU:14395:p.cs.uiuc.edu:80500083:000:501
Nf-From: p.cs.uiuc.edu!johnson    Dec 16 21:39:00 1989


(X new) msg: y; foo

is the same as

| t |
t := X new.
t msg: y;
t foo

in Smalltalk-80.  Cascades are the only part of the Smalltalk syntax
that can be implemented by other parts without too much trouble.
On the other hand, you usually have to introduce a temporary.  The
definition proposed by Tim Budd only requires a few parenthesis to
replace cascades.  My guess is that this is probably the main reason
that the Smalltalk-80 definition is different from that of Little
Smalltalk.

Ralph Johnson