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strings draft Tom Lord (22 Jan 2004 05:11 UTC)
Re: strings draft Shiro Kawai (22 Jan 2004 09:46 UTC)
Re: strings draft Tom Lord (22 Jan 2004 17:45 UTC)
Re: strings draft Shiro Kawai (23 Jan 2004 05:03 UTC)
Re: strings draft Tom Lord (24 Jan 2004 00:45 UTC)
Re: strings draft Matthew Dempsky (23 Jan 2004 20:01 UTC)
Re: strings draft Shiro Kawai (24 Jan 2004 03:26 UTC)
Re: strings draft Tom Lord (24 Jan 2004 04:31 UTC)
Re: strings draft Shiro Kawai (24 Jan 2004 04:49 UTC)
Re: strings draft Tom Lord (24 Jan 2004 19:01 UTC)
Re: strings draft Shiro Kawai (24 Jan 2004 22:15 UTC)
Octet vs Char (Re: strings draft) Shiro Kawai (26 Jan 2004 09:58 UTC)
Strings, one last detail. bear (30 Jan 2004 21:12 UTC)
Re: Strings, one last detail. Shiro Kawai (30 Jan 2004 21:43 UTC)
Re: Strings, one last detail. Tom Lord (31 Jan 2004 00:27 UTC)
Re: Strings, one last detail. bear (31 Jan 2004 20:25 UTC)
Re: Strings, one last detail. Tom Lord (31 Jan 2004 20:56 UTC)
Re: Strings, one last detail. bear (01 Feb 2004 02:28 UTC)
Re: Strings, one last detail. Tom Lord (01 Feb 2004 02:58 UTC)
Re: Strings, one last detail. bear (01 Feb 2004 07:53 UTC)
Re: Octet vs Char (Re: strings draft) bear (26 Jan 2004 19:04 UTC)
Re: Octet vs Char (Re: strings draft) Matthew Dempsky (26 Jan 2004 13:13 UTC)
Re: Octet vs Char (Re: strings draft) Matthew Dempsky (26 Jan 2004 13:41 UTC)
Re: Octet vs Char Shiro Kawai (26 Jan 2004 23:38 UTC)
Re: Octet vs Char (Re: strings draft) Ken Dickey (26 Jan 2004 19:40 UTC)
Re: Octet vs Char Shiro Kawai (27 Jan 2004 05:10 UTC)
Re: Octet vs Char Tom Lord (27 Jan 2004 05:37 UTC)
Re: Octet vs Char bear (27 Jan 2004 08:35 UTC)
Re: Octet vs Char (Re: strings draft) bear (27 Jan 2004 08:32 UTC)
Re: Octet vs Char (Re: strings draft) Ken Dickey (27 Jan 2004 06:50 UTC)
Re: Octet vs Char (Re: strings draft) bear (27 Jan 2004 19:06 UTC)
Re: strings draft bear (22 Jan 2004 19:05 UTC)
Re: strings draft Tom Lord (23 Jan 2004 02:06 UTC)
READ-OCTET (Re: strings draft) Shiro Kawai (23 Jan 2004 06:00 UTC)
Re: strings draft bear (23 Jan 2004 07:04 UTC)
Re: strings draft bear (23 Jan 2004 07:20 UTC)
Re: strings draft Tom Lord (24 Jan 2004 00:15 UTC)
Re: strings draft Alex Shinn (26 Jan 2004 01:58 UTC)
Re: strings draft Tom Lord (26 Jan 2004 02:35 UTC)
Re: strings draft bear (26 Jan 2004 02:35 UTC)
Re: strings draft Tom Lord (26 Jan 2004 03:01 UTC)
Re: strings draft Alex Shinn (26 Jan 2004 03:00 UTC)
Re: strings draft Tom Lord (26 Jan 2004 03:27 UTC)
Re: strings draft Shiro Kawai (26 Jan 2004 04:57 UTC)
Re: strings draft Alex Shinn (26 Jan 2004 04:57 UTC)
Re: strings draft tb@xxxxxx (23 Jan 2004 18:48 UTC)
Re: strings draft bear (24 Jan 2004 02:21 UTC)
Re: strings draft tb@xxxxxx (23 Jan 2004 02:09 UTC)
Re: strings draft Tom Lord (23 Jan 2004 02:42 UTC)
Re: strings draft tb@xxxxxx (23 Jan 2004 02:44 UTC)
Re: strings draft Tom Lord (23 Jan 2004 03:07 UTC)
Re: strings draft tb@xxxxxx (23 Jan 2004 03:04 UTC)
Re: strings draft Tom Lord (23 Jan 2004 03:29 UTC)
Re: strings draft tb@xxxxxx (23 Jan 2004 03:42 UTC)
Re: strings draft Alex Shinn (23 Jan 2004 02:34 UTC)
Re: strings draft tb@xxxxxx (23 Jan 2004 02:42 UTC)
Re: strings draft Tom Lord (23 Jan 2004 03:02 UTC)
Re: strings draft Alex Shinn (23 Jan 2004 02:58 UTC)
Re: strings draft tb@xxxxxx (23 Jan 2004 03:13 UTC)
Re: strings draft Alex Shinn (23 Jan 2004 03:18 UTC)
Re: strings draft Bradd W. Szonye (23 Jan 2004 19:31 UTC)
Re: strings draft Alex Shinn (26 Jan 2004 02:21 UTC)
Re: strings draft Bradd W. Szonye (06 Feb 2004 23:30 UTC)
Re: strings draft Bradd W. Szonye (06 Feb 2004 23:33 UTC)
Re: strings draft Alex Shinn (09 Feb 2004 01:45 UTC)
specifying source encoding (Re: strings draft) Shiro Kawai (09 Feb 2004 02:51 UTC)
Re: strings draft Bradd W. Szonye (09 Feb 2004 03:39 UTC)
Re: strings draft tb@xxxxxx (23 Jan 2004 03:12 UTC)
Re: strings draft Alex Shinn (23 Jan 2004 03:28 UTC)
Re: strings draft tb@xxxxxx (23 Jan 2004 03:44 UTC)
Parsing Scheme [was Re: strings draft] Ken Dickey (23 Jan 2004 08:07 UTC)
Re: Parsing Scheme [was Re: strings draft] bear (23 Jan 2004 17:55 UTC)
Re: Parsing Scheme [was Re: strings draft] tb@xxxxxx (23 Jan 2004 18:50 UTC)
Re: Parsing Scheme [was Re: strings draft] Per Bothner (23 Jan 2004 18:56 UTC)
Re: Parsing Scheme [was Re: strings draft] Tom Lord (23 Jan 2004 20:39 UTC)
Re: Parsing Scheme [was Re: strings draft] Per Bothner (23 Jan 2004 20:57 UTC)
Re: Parsing Scheme [was Re: strings draft] Tom Lord (23 Jan 2004 21:57 UTC)
Re: Parsing Scheme [was Re: strings draft] Tom Lord (23 Jan 2004 20:20 UTC)
Re: Parsing Scheme [was Re: strings draft] tb@xxxxxx (23 Jan 2004 21:22 UTC)
Re: Parsing Scheme [was Re: strings draft] Tom Lord (23 Jan 2004 22:52 UTC)
Re: Parsing Scheme [was Re: strings draft] tb@xxxxxx (24 Jan 2004 06:48 UTC)
Re: Parsing Scheme [was Re: strings draft] Tom Lord (24 Jan 2004 18:55 UTC)
Re: Parsing Scheme [was Re: strings draft] tb@xxxxxx (24 Jan 2004 19:34 UTC)
Re: Parsing Scheme [was Re: strings draft] Tom Lord (24 Jan 2004 22:02 UTC)
Re: Parsing Scheme [was Re: strings draft] Ken Dickey (23 Jan 2004 12:53 UTC)
Re: Parsing Scheme [was Re: strings draft] Tom Lord (23 Jan 2004 23:35 UTC)
Re: Parsing Scheme [was Re: strings draft] Ken Dickey (24 Jan 2004 16:10 UTC)
Re: Parsing Scheme [was Re: strings draft] Tom Lord (25 Jan 2004 03:14 UTC)
Re: strings draft Matthew Dempsky (25 Jan 2004 00:00 UTC)
Re: strings draft Tom Lord (25 Jan 2004 07:29 UTC)
Re: strings draft Matthew Dempsky (26 Jan 2004 16:53 UTC)
Re: strings draft Tom Lord (27 Jan 2004 00:44 UTC)

Re: strings draft Tom Lord 24 Jan 2004 04:31 UTC


    > From: Shiro Kawai <xxxxxx@lava.net>

    > Thanks for the detailed reply.  Now I'm getting the point.

    >  * An implementation are free to have non-Unicode-compatible
    >    char/string, as far as it shares the mimimum requirement,
    >    which is not much more than current R5RS with some
    >    clearification (case mapping issues aside).

Right.

    >  * _If_ an implementation can also have a subset of Unicode-
    >    compatible char/string, this subset of char/string should
    >    follow the codepoint-index.  The index handling of the rest
    >    of char/string is up to the implementation.

Right.

    > Did I get it right?

So far.

    > So, when the EUCJP Scheme reads a string

    >  "\U+30AB.\U+309A."

    > Then it can produce a string which consists of a single characetr
    > EUCJP #xA5F7.

Eh... no.   The final language should be such that that string
constant denotes a string of two Unicode codepoints.

I'm typing in ASCII here but let's pretend that ``<#xa5F7>'' is the
literal (not numeric escape) way to write that EUCJP character.

Then an implementation (such as an EUCJP implementation) is free to
have:

	(string-length "<#xa5F7>") => 1

and another implementation (such as a Unicode implementation) is free
to have:

	(string-length "<#xa5F7>") => 2

but all implementations must either refuse to read

	"\U+30AB.\U+309A."

or have

	(string-length "\U+30AB.\U+309A.") => 2

This area is a little touchy, even for Unicode-supporting
implementations.   The same literal string might wind up in two
different canonicalization forms in Unicode, resulting in different
lengths and indexes.   The same literal string might wind up as length
1 in Bears's implementation, and length N>1 in other implementations.

Those "touchy" issues are things I'd expect to be touched up by
supplementary standards such as SRFIs.  There could be a
"Canonicalization form D Standards for Scheme" that Bear's wouldn't
conform to but Pika does.  Another for "EUCJP Standards for Scheme
that Guache would conform to but not Bear's.  Etc.  We can take some
time to see what's winning at that level and then duke it out for
R9RS :-)

    > It is outside of the scope of your document,
    > so the implementation is free to imlement such as

    >  (define x "\U+30AB.\U+309A.")
    >  (string-length x) => 1
    >  (string-ref x 1)  => <character EUCJP #xA5F7>
    >  (let ((y (string-copy x)))
    >    (string-set! y 0 #\a)
    >    y) => "a"

    > If so, I have no problem to adopt the "codepoint index" proposal.

Well, how about if I agree to every bit of that except for the syntax
you used for the string constant?

    > [About O(1) property]

(I'll reply to the rest later.)

-t