In perl.git, the branch blead has been updated <http://perl5.git.perl.org/perl.git/commitdiff/db5cc9f9ace5f7ec3feeded852dc53793477c17e?hp=acdfc3b6cf1374c974570ccc518854db69d7f8a8>
- Log ----------------------------------------------------------------- commit db5cc9f9ace5f7ec3feeded852dc53793477c17e Author: Matthew Horsfall <[email protected]> Date: Tue Jan 20 12:45:02 2015 -0500 Release prep - Copy descriptions of new errors in perldiag to delta ----------------------------------------------------------------------- Summary of changes: pod/perldelta.pod | 52 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 52 insertions(+) diff --git a/pod/perldelta.pod b/pod/perldelta.pod index b6e0cdc..bb81777 100644 --- a/pod/perldelta.pod +++ b/pod/perldelta.pod @@ -275,18 +275,70 @@ locale, but Perl disagrees). L<Both or neither range ends should be Unicode in regex; marked by E<lt>-- HERE in mE<sol>%sE<sol>|perldiag/"Both or neither range ends should be Unicode in regex; marked by <-- HERE in m/%s/"> +(W regexp) (only under C<S<use re 'strict'>> or within C<(?[...])>) + +In a bracketed character class in a regular expression pattern, you +had a range which has exactly one end of it specified using C<\N{}>, and +the other end is specified using a non-portable mechanism. Perl treats +the range as a Unicode range, that is, all the characters in it are +considered to be the Unicode characters, and which may be different code +points on some platforms Perl runs on. For example, C<[\N{U+06}-\x08]> +is treated as if you had instead said C<[\N{U+06}-\N{U+08}]>, that is it +matches the characters whose code points in Unicode are 6, 7, and 8. +But that C<\x08> might indicate that you meant something different, so +the warning gets raised. + =item * L<Ranges of ASCII printables should be some subset of "0-9", "A-Z", or "a-z" in regex; marked by <-- HERE in mE<sol>%sE<sol>|perldiag/"Ranges of ASCII printables should be some subset of "0-9", "A-Z" ... [60 chars truncated] +(W regexp) (only under C<S<use re 'strict'>> or within C<(?[...])>) + +Stricter rules help to find typos and other errors. Perhaps you didn't +even intend a range here, if the C<"-"> was meant to be some other +character, or should have been escaped (like C<"\-">). If you did +intend a range, the one that was used is not portable between ASCII and +EBCDIC platforms, and doesn't have an obvious meaning to a casual +reader. + + [3-7] # OK; Obvious and portable + [d-g] # OK; Obvious and portable + [A-Y] # OK; Obvious and portable + [A-z] # WRONG; Not portable; not clear what is meant + [a-Z] # WRONG; Not portable; not clear what is meant + [%-.] # WRONG; Not portable; not clear what is meant + [\x41-Z] # WRONG; Not portable; not obvious to non-geek + +(You can force portablity by specifying a Unicode range, which means that +the endpoints are specified by +L<C<\N{...}>|perlrecharclass/Character Ranges>, but the meaning may +still not be obvious.) +The stricter rules require that ranges that start or stop with an ASCII +character that is not a control have all their endpoints be the literal +character, and not some escape sequence (like C<"\x41">), and the ranges +must be all digits, or all uppercase letters, or all lowercase letters. + =item * L<Ranges of digits should be from the same group in regex; marked by <-- HERE in mE<sol>%sE<sol>|perldiag/"Ranges of digits should be from the same group in regex; marked by <-- HERE in m/%s/"> +(W regexp) (only under C<S<use re 'strict'>> or within C<(?[...])>) + +Stricter rules help to find typos and other errors. You included a +range, and at least one of the end points is a decimal digit. Under the +stricter rules, when this happens, both end points should be digits in +the same group of 10 consecutive digits. + =item * L<"%s" is more clearly written simply as "%s" in regex; marked by <-- HERE in mE<sol>%sE<sol>|perldiag/"%s" is more clearly written simply as "%s" in regex; marked by <-- HERE in mE<sol>%sE<sol>> +(W regexp) (only under C<S<use re 'strict'>> or within C<(?[...])>) + +You specified a character that has the given plainer way of writing it, +and which is also portable to platforms running with different character +sets. + =back =head2 Changes to Existing Diagnostics -- Perl5 Master Repository
