On Fri, Aug 17, 2012 at 1:42 PM, Mariano Martinez Peck <marianopeck@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