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DEFMETHOD compile-time processing
In the Meta Object Protocol draft number 10 [89-003], on page 3-16 it says
"At compile time: ... (5) The method function is computed by
evaluating the special form (FUNCTION <lambda>) in the lexical
environment of the DEFMETHOD. ... (7) The function ADD-METHOD is
This isn't going to work. You can install the function at load
time in its lexical environment, or you can install it at compile time in
the null lexical environment, but you can't evaluate something at
compile-time in its run-time lexical environment.
Possible remedies include:
* Do the compile-time call to ADD-METHOD only if the DEFMETHOD appears at
top-level in a null lexical environment. This would be consistent with
the treatment of DEFMACRO in proposal DEFINING-MACROS-NON-TOP-LEVEL.
* Don't ever do a compile-time call to ADD-METHOD. I haven't seen a
reason why methods would need to be installed in the compile-time
environment. Apparently at least some information about generic
function definitions needs to be remembered for use when invoking
MAKE-METHOD-LAMBDA, but that wouldn't require being able to actually
call the generic function at compile-time.