Your message dated Mon, 15 Aug 2016 23:51:38 +0100
with message-id <[email protected]>
and subject line Re: Bug#833892: perl-base: possible bug in perl "\u" string
processing
has caused the Debian Bug report #833892,
regarding perl-base: possible bug in perl "\u" string processing
to be marked as done.
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833892: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=833892
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--- Begin Message ---
Package: perl-base
Version: 5.22.2-3
Severity: normal
Tags: upstream
Hey.
The following might be a bug in how Perl uppercases strings as in e.g.:
print "\uf";
perlop(1) already documents, that in Unicode context, this can result
in inserting addition characters.
Typical example is:
U+00DF LATIN SMALL LETTER SHARP S
where the Unicode rules specify that this single character results in
"SS"[0].
Anyway, when in perl I do e.g.:
$ perl -C -e 'print "\U\N{U+00DF}\E\n";'
SS
is returned, which is good.
However, when I do:
$ perl -C -e 'print "\u\N{U+00DF}\E\n";'
Ss
is returned.
Now IMO that's an error, \u says "titlecase (not uppercase!) next character
only", the next character is however \N{U+00DF} (aka ß) and it's
capitalisation should AFAIU result in "SS", not "Ss".
Cheers,
Chris.
[0] Not sure if this is still the case in most recent versions, as there
is now a majuscle form of that character:
U+1E9E LATIN CAPITAL LETTER SHARP S
--- End Message ---
--- Begin Message ---
On Wed, Aug 10, 2016 at 03:15:14AM +0200, Christoph Anton Mitterer wrote:
> The following might be a bug in how Perl uppercases strings as in e.g.:
> print "\uf";
>
> perlop(1) already documents, that in Unicode context, this can result
> in inserting addition characters.
> Typical example is:
> U+00DF LATIN SMALL LETTER SHARP S
> where the Unicode rules specify that this single character results in
> "SS"[0].
>
> Anyway, when in perl I do e.g.:
> $ perl -C -e 'print "\U\N{U+00DF}\E\n";'
> SS
> is returned, which is good.
> However, when I do:
> $ perl -C -e 'print "\u\N{U+00DF}\E\n";'
> Ss
> is returned.
>
> Now IMO that's an error, \u says "titlecase (not uppercase!) next character
> only", the next character is however \N{U+00DF} (aka ß) and it's
> capitalisation should AFAIU result in "SS", not "Ss".
Hi Chris,
As per the upstream bug, I'm closing this as it appears to be not,
in fact, a bug.
Cheers,
Dominic.
--- End Message ---
