[squeak-dev] Objects as Booleans (was Re: Boolean over-optimization
bert at freudenbergs.de
Wed Mar 5 11:01:07 UTC 2008
On Mar 5, 2008, at 7:52 , Lukas Renggli wrote:
>> So, the only way is to compile method without optimization of
>> #ifTrue #ifFalse:,
>> to make sure they do real sends?
> Just today in my blog-reader:
> This should also work in Squeak.
Hehe, very cool. It works a bit differently in Squeak, where the
image code has to rewind the context before the jump bytecode that
recognized the non-boolean. Attached is a little changeset that adds
#asBoolean to various classes and overrides #mustBeBooleanIn: to use
that, provided objectsAsBooleans has been enabled. File in, then try
Preferences enable: #objectsAsBooleans.
#(0 1 nil #() #(a b c) 'hi' '') collect: [:each |
each -> (each ifTrue: ['yes'] ifFalse: ['no'])]
#(0->'no' 1->'yes' nil->'no' #()->'no' #(#a #b #c)->'yes' 'hi'->'yes'
Fun indeed :)
- Bert -
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