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| author | Jarkko Hietaniemi <jhi@iki.fi> | 1998-08-12 18:42:35 +0300 |
|---|---|---|
| committer | Gurusamy Sarathy <gsar@cpan.org> | 1998-09-23 03:20:13 +0000 |
| commit | 8ada0baa1f731edbe470a7630cfeb30c131b4672 (patch) | |
| tree | 878d7ca51320e5fb9ab9f95b0c13c54031deddad /pod/perlre.pod | |
| parent | 4beedc23b598a493399ba23c8c4bd5448e52283a (diff) | |
| download | perl-8ada0baa1f731edbe470a7630cfeb30c131b4672.tar.gz | |
apply minimal variant of patch (sent via private mail)
Message-Id: <199808121242.PAA29761@comanche.spices>
Subject: [PATCH] 5.004_02 or 5.005_51: fix regexp and tr character ranges in non-ASCII lands
p4raw-id: //depot/perl@1803
Diffstat (limited to 'pod/perlre.pod')
| -rw-r--r-- | pod/perlre.pod | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/pod/perlre.pod b/pod/perlre.pod index 1b49ba4e7b..f696525155 100644 --- a/pod/perlre.pod +++ b/pod/perlre.pod @@ -735,6 +735,13 @@ following all specify the same class of three characters: C<[-az]>, C<[az-]>, and C<[a\-z]>. All are different from C<[a-z]>, which specifies a class containing twenty-six characters.) +Note also that the whole range idea is rather unportable between +character sets--and even within character sets they may cause results +you probably didn't expect. A sound principle is to use only ranges +that begin from and end at either alphabets of equal case ([a-e], +[A-E]), or digits ([0-9]). Anything else is unsafe. If in doubt, +spell out the character sets in full. + Characters may be specified using a metacharacter syntax much like that used in C: "\n" matches a newline, "\t" a tab, "\r" a carriage return, "\f" a form feed, etc. More generally, \I<nnn>, where I<nnn> is a string |