To run the above demo, open a Lisp workspace and execute “(@open ListDemo)” – you can open Vista Smalltalk in your browser here.
This test was designed to test event callbacks using Smalltalk-style messaging.
Here is part of the code (the full source is here):
(setq btn (@new Button))
(@label- btn “Selection One”)
(@addcallback-function- btn “click” (lambda() (@self ‘oneselected- lst)))
(@addchild- hb btn)
Of course this doesn’t look like Smalltalk – it looks like some weird kind of Lisp. But it is equivalent, semantically, to this Smalltalk code:
btn := Button new.
btn label: ‘Selection One’.
btn addcallback: ‘click’ function: [self oneselected: lst].
hb addchild: btn
The next step is to make a Lisp reader that can read Smalltalk source (not too difficult), and then rearrange the Smalltalk token stream into the “weird Lisp” format above using macros.
Smalltalk running in Flash is not that far away.
This is like being 6 again and waiting for Christmas!
Comment by Andy Burnett — March 1, 2007 @ 5:25 pm
That’s great…I had always advocated having multiple syntax choices for smalltalk….
How about adding a syntax that allows if () {} etc without having to do obj.Message()
That would be great to not have to choose between prefix and postfix (lisp and smalltalk) notation but also a more “C” like one…
Bravo!
Software Maestro
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