diff options
Diffstat (limited to 'pod/perldiag.pod')
| -rw-r--r-- | pod/perldiag.pod | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/pod/perldiag.pod b/pod/perldiag.pod index 20c0ae1325..6802b08ac5 100644 --- a/pod/perldiag.pod +++ b/pod/perldiag.pod @@ -899,6 +899,30 @@ a B<-e> switch. Maybe your /tmp partition is full, or clobbered. opposed to a subroutine reference): no such method callable via the package. If method name is C<???>, this is an internal error. +=item Character class syntax [. .] is reserved for future extensions + +(W) Within regular expression character classes ([]) the syntax beginning +with "[." and ending with ".]" is reserved for future extensions. +If you need to represent those character sequences inside a regular +expression character class, just quote the square brackets with the +backslash: "\[." and ".\]". + +=item Character class syntax [: :] is reserved for future extensions + +(W) Within regular expression character classes ([]) the syntax beginning +with "[:" and ending with ":]" is reserved for future extensions. +If you need to represent those character sequences inside a regular +expression character class, just quote the square brackets with the +backslash: "\[:" and ":\]". + +=item Character class syntax [= =] is reserved for future extensions + +(W) Within regular expression character classes ([]) the syntax +beginning with "[=" and ending with "=]" is reserved for future extensions. +If you need to represent those character sequences inside a regular +expression character class, just quote the square brackets with the +backslash: "\[=" and "=\]". + =item chmod: mode argument is missing initial 0 (W) A novice will sometimes say |