🚀 go-pugleaf

   From: charest@Aig.Jpl.Nasa.Gov (Len Charest)
   Date: Fri, 25 Sep 1992 22:41:27 GMT

   How do I determine the valid initargs for a method on MAKE-INSTANCE?
   For example, when programmatically creating a class:

   (make-instance 'standard-class
		  :name 'green
		  :direct-superclasses (mapcar #'find-class '(yellow blue)))

   How can I determine whether a given implementation supports the
   (MOPish) :NAME and :DIRECT-SUPERCLASSES initargs...

I think this piece of code should be easy to write with the MOP.

Use compute-applicable-methods, class-prototype and method-lambda-list
to figure out what keywords all the methods accept.  (Actually, it might
be good to split this out as a seperate operation that works on any
generic function, or list of methods.)  Then use class-slots and
slot-definition-initargs to figure out what slot filling initargs the
standard method on shared-initialize accepts.

You should actually be able to figure out what you want to know this
way.  If you can't, that may say something about the initialization
protocol.

Gregor