[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Issue: MAKE-STRING-FILL-POINTER (Version 1)
- To: masinter.pa@Xerox.COM
- Subject: Issue: MAKE-STRING-FILL-POINTER (Version 1)
- From: Jon L White <jonl@lucid.com>
- Date: Thu, 10 Nov 88 20:48:49 PST
- Cc: Moon@STONY-BROOK.SCRC.Symbolics.COM, CL-Cleanup@sail.stanford.edu
- In-reply-to: masinter.pa@Xerox.COM's message of 10 Nov 88 15:52 PST <881110-155219-5804@Xerox>
re: . . .the character proposal ... would require MAKE-STRING to take an
:element-type keyword.
I don't see that this is absolutely necessary, since a default type could
certainly be satisfactory for MAKE-STRING; you could use MAKE-ARRAY for
creating non-default types and features. In the current situation,
:element-type STRING-CHAR is what defines a string.
However, if we are to extend MAKE-STRING, what's the point of doing so
unless it becomes capable of accepting all the same keyword arguments
as MAKE-ARRAY? It's only a shorthand for defaulting :element-type.
That's the point of the sample code [which was not intended to be run
so please forgive the typos and neglect of the "suppliedp" question on
initial element/contents.] One can accommodate varieties of strings by
overriding the default for an :element-type argument.
(defun make-string (size &key (element-type 'string-char)
initial-element initial-contents
adjustable fill-pointer
displaced-to displaced-index-offset)
(check-type size integer)
(make-array size :element-type element-type
:initial-element initial-element
:initial-contents initial-contents
:adjustable adjustable
:fill-pointer fill-pointer
:displaced-to displaced-to
:displaced-index-offset displaced-index-offset))
-- JonL --