Hi edouard
I will check as soon as I get some time.
I'm new on this mailing list, this is my first mail :-)
welcome
I'm a student from University of Lille (France). I'm studying this
tutorial (I'm using Pharo 4 but it seems not to be a problem):
http://sdmeta.gforge.inria.fr/Teaching/ObjVLisp/ObjV.pillar.pdf. I'm
working with the "ObjVLispSkeleton-StephaneDucasse.1" image loaded
from this repository:
MCSmalltalkhubRepository
owner: 'StephaneDucasse'
project: 'ObjVLispSkeleton'
user: ''
password: ''
I'm stuck at "Method Lookup" p11. First, it seems that unit tests
"testNilWhenErrorInLookup" and "testRaisesErrorSendWhenErrorInLookup"
are not provided,
Mark if you read this mail. Did you get problem when you did it?
thus I'm not sure that I'm working with the right image (everything
was fine until p11 though). Then, the "lookup: selector" is not
provided neither.
Not providing lookup: is ok since you have to define it. I will look for
the tests in my version.
While there is another method named "lookup: selector from:
anObjObject", I can't figure out what I'm supposed to do with the
second parameter.
What you should see is that the second argument is is provided here
because when you raise an error, you should send a messageNotUnderstood
and this message should be sent to the original object that received the
message and not the class where the method was found.
So lookup will use the receiver to walk through the inheritance chain
and the from: argument in case of error
Here is what I would do:
lookup: selector
"look for the method named <selector> starting in the receiver.
The lookup is done for a message sent to <anObjObject>. self is an
objClass"
^ self objMethodDict
at: selector
ifAbsent: [ self objSuperclassId ifNotNil: [ self objSuperclass
lookup: selector ] ]
what do you return when you do not find the class
Could someone tell me if this implementation is correct? If it's
correct, what do you think the second parameter is for?
Moreover, do you think I'm working with the right image?
Thanks.
- Edouard
