On Fri, Aug 17, 2012 at 1:42 PM, Mariano Martinez Peck < marianop...@gmail.com> wrote:
> Hi guys. Right now we have > > methodClass > "answer the class that I am installed in" > ^self numLiterals > 0 > ifTrue: [ (self literalAt: self numLiterals) value ] > ifFalse: [ nil ] > > But of course my image has no method with 0 literals: > > (CompiledMethod allInstances select: [:each | each numLiterals = 0 ]) size > -> 0 > > So...can this really happen? or I can just remove the if ? > Yes it could happen. For example, i the Newspeak implementation above Squeak these is a collection of inst-var accessors that are shared through all Newspeak classes in the system. These have a nil methodClass. If one wanted to save space they could have no methodClass instead of nil in the methodClass slot. (Note that the above works for these since nil value = value). So IMO its a harmless piece of defensice programming. IIABDFI (If it ain't broke don't fix it). > > thanks > > -- > Mariano > http://marianopeck.wordpress.com > > -- best, Eliot
