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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: Parsing Scheme [was Re: strings draft] Ken Dickey 23 Jan 2004 12:53 UTC

On Friday 23 January 2004 07:56 pm, Per Bothner wrote:
> Ken Dickey wrote:
> > It would be a *bad thing* if in going from one locale to another changed
> > a working Scheme program into a broken Scheme program.

> Huh?  What do you mean?  How can a source file containing Scheme
> source code possibly be locale independent?  What if you're on
> a system whose native encoding is EBCDIC?  What if you use
> non-ascii character in string literals or symbols?

I mean that if I write a Scheme program in Germany and move to Turkey that the
source I READ should continue to have the equivalent behavior given a level
of support for character sets.  [My computer knows my locale].  I should be
able to query an implementation to see if an implementation supports a
particular level of character/string support and write programs that assume
that level (be it ASCII, Unicode, EBCDIC, whatever).  I should be able to
write a utility using READ, WRITE, WRITE-CHAR et al which translates between
character sets [ASCII, Unicode, EBCDIC].  I should be able to write a Scheme
program whose source is ASCII which deals with Unicode IO.

To "standardize" string and character handling beyond the limited, but very
useful, subset which Scheme currently has means to me that we need to deal
with "portability" aspects of "embedded characters in strings" as specified
by READ.

One of the reasons I tend to do more math in Scheme (or Smalltalk or
CommonLisp) is that I can use rationals, bignums and complex numbers in a
relatively abstract an unified way -- in implementations which support them.

I expect the numeric code I write assuming such numeric support to break in
systems which don't support numeric types.  I find that such code does work
as I expect in a large number of implementations.

I am happy to write programs in which identifiers are limited to those
characters supported today in R5RS.  But I would like to be able to
manipulate Unicode strings natively -- even if as a separate datatype than
current strings (I assume conversion/mapping functions).  I am satisfied if
STRING->SYMBOL signals an error if non-ascii characters are used.

So in the "weak" case, I would support a new, UNICODE-STRING datatype SRFI and
reasonable set of operations which has well specified interactions with
strings as currently defined.

I see no reason that this could not be done as a library with little impact on
R6RS and no need to codify a such a standard prior to a wide experience of
its consequences.

[Comments?  I Know you have comments!  8^]

Cheers,
-KenD