list of proposed changes to Common Lisp

[Guy Steele <gls@THINK-AQUINAS.ARPA>]

    Date: Sat, 14 Dec 1985  00:46 EST
    From: Rob MacLachlan <RAM@C.CS.CMU.EDU>

	(*) 107 Clarify that GET-SETF-METHOD and GET-SETF-METHOD-MULTIPLE-VALUE do
	not perform macro-expansion on the given form ...

    This won't work, as it prohibits defining setf methods for macros.
    GET-SETF-METHOD needs the environment so that it can expand macros one
    level at a time, checking if the result has a setf method.  I also
    suggest that the environment argument not be optional, as any user
    code which doesn't supply it is surely broken.

Right you are.

    312 It should be explicitly noted somewhere that defstruct copiers
    work on structures which are a subtype by inclusion, e.g. COPY-PERSON
    works on an astronaut.  This is a natural consequence of the subtype
    semantics of inclusion, but isn't necessarily obvious to pea-brained
    implementors.

Presumably COPY-PERSON, when applied to an ASTRONAUT, returns something
that is a PERSON but not an ASTRONAUT; that is, it makes a copy of just
the PERSON part of an ASTRONAUT?

--Guy