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Having used X-Lisp for a while, I moved over to TI-Scoops. There are
two very annoying defects in that implementation of OOP.
1) SCOOPS objects don't have a SELF instance variable. I had to get
around this by redefininng SEND to do a FLUID-LET on the symbol
SELF before sending the message, but this is both ugly and slow.
2) There is no SEND-SUPER primitive - this means that super-classes
methods must be completely overridden, rather than extended which
removes a lot of the benefits of having inheritance in the first
A slightly less annoying feature is that the arguments to SEND are evaluated
in the environment of the object begin sent-to rather than in the calling
(let ((a 1))
(send an-object (+ a 1)))
will bomb-out due to 'a' not being defined in an-object's environment.
Has anybody got good solutions to the above?
Donal O'Mahony email@example.com
Computer Science Dept., Trinity College, Dublin 2, Ireland