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re: Issue: DEFSTRUCT-CONSTRUCTOR-KEY-MIXTURE (Version 2)
- To: firstname.lastname@example.org
- Subject: re: Issue: DEFSTRUCT-CONSTRUCTOR-KEY-MIXTURE (Version 2)
- From: Kim A. Barrett <IIM@ECLA.USC.EDU>
- Date: 2 Jan 89 14:52 PST
- Sender: masinter.pa@Xerox.COM
Version 2, 21-Sep-88, Mailed 6 Oct 88
While I support the concept, the wording needs cleanup. If these problems are
fixed, then I'll vote YES.
1. The proposal explicitely says to allow &OPTIONAL, &KEY, and &AUX keywords,
but fails to mention &REST and &ALLOW-OTHER-KEYS.
2. The proposal does not say how defaulting is to be done when the programmer
doesn't supply a default value for a keyword argument. I assume that the
intent is that it will do defaulting in the same way &OPTIONAL arguments are
specified to default in CLtL, ie. if no default is supplied in the lambda-list
then use the slot initform, else undefined.
3. The proposal does not say which of key/var gets matched to the slot name in
keyword parameter specifiers of the form ((key var) [default [svar]]). I
assume that it should be var that gets matched, since that gives the programmer
the most options, but this needs to be stated explicitely.
Note for Current Practice: The latest version of IIM Common Lisp implements