[ENH] UpArrow as operator (was: Must _ go like the Dodo?)
Travis Griggs
tgriggs at keyww.com
Thu Mar 18 06:47:50 UTC 1999
Doug Way wrote:
> On Wed, 17 Mar 1999, Bert Freudenberg wrote:
>
> > Doug Way wrote:
> >
> > > I guess a better argument for using something other than ^ for returning
> > > is that you could then use ^ in place of raisedTo:, e.g. x^2, which is
> > > semi-standard typed-math notation. (When was this introduced?) Still,
> > > it ain't gonna happen. :-)
> >
> > What's not gonna happen? Using ^ as an operator is as easy as using |
> > (there is code in the parser to special-case the vertical bar). The
> > attached changeset patches the parser and adds Number>>#^ to give the
> > expected result ...
>
> Sorry, by "ain't gonna happen" I just meant that I didn't think the ^ was
> ever going to be removed as the return symbol. You've certainly proved
> that it's possible to use it for both the return symbol and an operator!
> (I guess I should have thought of that, since the parser can determine
> whether the ^ is the first part of a statement or not...)
Of course, this could result in some head scratching confusion. Consider the two
following methods:
methodA
self doSomeCode.
self doSomeMoreCode.
self funStuff
^aResult
methodB
self doSomeCode.
self doSomeMoreCode.
self funStuff.
^aResult
See the difference? No longer will one be warned about end of statement list
expected when accepting methodA, instead a runtime exception stating that
whatever results from funStuff doesNotUnderstand ^.
--
Travis Griggs (a.k.a. Lord of the Fries)
Key Technology
tgriggs at keyww.com
Member, Fraven Skreiggs Software Collective
- C for Sinking
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