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Mopping up after the fact
- To: Moon@stony-brook.scrc.symbolics.com
- Subject: Mopping up after the fact
- From: Jon L White <jonl@lucid.com>
- Date: Mon, 19 Nov 1990 22:41:20 PST
- Cc: mop@arisia.Xerox.COM
- In-reply-to: "Moon@stony-brook.scrc.symbolics.com's message of Mon, 19 Nov 1990 15:14:00 PST <19901119231436.6.MOON@KENNETH-WILLIAMS.SCRC.Symbolics.COM>"
re: Could you send a 10 to 15 line, no longer, summary of what exactly ...
The following two paragraphs lifted from the longer message are about 15 lines
total, and hit at the essence of what I was saying. The upshot is that no
change is implied for default initargs (since we aren't using "Initializer"
objects); but the extra kinds of <mumble>-SLOT-DEFINITIONS could go away
(leaving primarily one) if we chose not to recode the storage of canonicalized
slot _specifications_ from lists into standard-object instances. The rest
of the message was rebutting the hypothetical argument that it could be useful
somewhere, someday, to have done the recoding.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
*** Only the one function *** -- COMPUTE-CLASS-DEFAULT-INITARGS -- ever looks
at the "direct" default initarg specifications; and in some cases it would be
premature to classify them into Initializer classes until FINALIZE-INHERITANCE
is called on that class. The natural course is to leave the "specifications"
in their list-structure original format, and to let the function invoked at
inheritance finalization time be the sole one responsible for collecting the
pieces of spec into a full, effective "definition."
Just as in the case of the :DEFAULT-INITARGS specifications, *** only the one
function *** -- COMPUTE-SLOTS -- ever looks at the "direct" slot specifications
and in some cases it might be premature to classify them into final
SLOT-DEFINITION sub-classes until FINALIZE-INHERITANCE is called on that class.
The natural course is to leave the "specifications" in their list-structure
original format, and to let the function invoked at inheritance finalization
time be the sole one responsible for collecting the pieces of spec into a full,
effective "definition."
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
-- JonL --