On Sun, 10 Oct 2010, Randal L. Schwartz wrote:
"Igor" == Igor Stasenko <[email protected]> writes:
Igor> i am also missing:
Igor> someThing ifTrue: 1 ifFalse: 0
Down that path lies ambiguity though.
If you had
actionSymbol := aBoolean ifTrue: #doThis else: #doThat.
do you want the symbol assigned, or performed?
The implementation is staightforward IMHO.
If the receiver expects a niladic block, then the argument is returned. If
the receiver can accept a niladic or a monadic block, then #cull: is sent
to the argument. If the receiver expects a monadic block, then #value: is
sent to the argument. This works perfercly with blocks.
Keyword selector symbols are equivalent with monadic blocks in this case,
so Symbol >> #cull: can be implemented as ^argument perform: self. For
other symbols #cull: is meaningless and #perform: will raise an error.
Levente
Please don't add so much dwimmery here. I like it that Smalltalk is
fairly strict with these basic forms.
--
Randal L. Schwartz - Stonehenge Consulting Services, Inc. - +1 503 777 0095
<[email protected]> <URL:http://www.stonehenge.com/merlyn/>
Smalltalk/Perl/Unix consulting, Technical writing, Comedy, etc. etc.
See http://methodsandmessages.posterous.com/ for Smalltalk discussion
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