| Name : perl-Unicode-Regex-Set
| |
| Version : 0.04
| Vendor : obs://build_opensuse_org/devel:languages:perl
|
| Release : lp155.7.1
| Date : 2023-07-20 16:14:08
|
| Group : Development/Libraries/Perl
| Source RPM : perl-Unicode-Regex-Set-0.04-lp155.7.1.src.rpm
|
| Size : 0.01 MB
| |
| Packager : https://www_suse_com/
| |
| Summary : Subtraction and Intersection of Character Sets
|
Description :
Perl 5.8.0 misses subtraction and intersection of characters, which is
described in Unicode Regular Expressions (UTS #18). This module provides a
mimic syntax of character classes including subtraction and intersection,
taking advantage of look-ahead assertions.
The syntax provided by this module is considerably incompatible with the
standard Perl\'s regex syntax.
Any whitespace character (that matches \'/\\s/\') is allowed between any
tokens. Square brackets (\'\'[\'\' and \'\']\'\') are used for grouping. A literal
whitespace and square brackets must be backslashed (escaped with a
backslash, \'\'\\\'\'). You cannot put literal \'\']\'\' at the start of a group.
A POSIX-style character class like \'[:alpha:]\' is allowed since its \'\'[\'\'
is not a literal.
SEPARATORS (\'\'&\'\' for intersection, \'\'|\'\' for union, and \'\'-\'\' for
subtraction) should be enclosed with one or more whitespaces. E.g. \'[A&Z]\'
is a list of \'\'A\'\', \'\'&\'\', \'\'Z\'\'. \'[A-Z]\' is a character range from \'\'A\'\'
to \'\'Z\'\'. \'[A-Z - Z]\' is a set by removal of \'[Z]\' from \'[A-Z]\'.
Union operator \'\'|\'\' may be omitted. E.g. \'[A-Z | a-z]\' is equivalent to
\'[A-Z a-z]\', and also to \'[A-Za-z]\'.
Intersection operator \'\'&\'\' has high precedence, so \'[\\p{A} \\p{B} & \\p{C}
\\p{D}]\' is equivalent to \'[\\p{A} | [\\p{B} & \\p{C}] | \\p{D}]\'.
Subtraction operator \'\'-\'\' has low precedence, so \'[\\p{A} \\p{B} - \\p{C}
\\p{D}]\' is equivalent to \'[[\\p{A} | \\p{B}] - [\\p{C} | \\p{D}] ]\'.
\'[\\p{A} - \\p{B} - \\p{C}]\' is a set by removal of \'\\p{B}\' and \'\\p{C}\' from
\'\\p{A}\'. It is equivalent to \'[\\p{A} - [\\p{B} \\p{C}]]\' and \'[\\p{A} - \\p{B}
\\p{C}]\'.
Negation. when \'\'^\'\' just after a group-opening \'\'[\'\', i.e. when they are
combined as \'\'[^\'\', all the tokens following are negated. E.g. \'[^A-Z a-z]\'
matches anything but neither \'[A-Z]\' nor \'[a-z]\'. More clearly you can say
this with grouping as \'[^ [A-Z a-z]]\'.
If \'\'^\'\' that is not next to \'\'[\'\' is prefixed to a sequence of literal
characters, character ranges, and/or metacharacters, such a \'\'^\'\' only
negates that sequence; e.g. \'[A-Z ^\\p{Latin}]\' matches \'A-Z\' or a non-Latin
character. But \'[A-Z [^\\p{Latin}]]\' (or \'[A-Z \\P{Latin}]\', for this is a
simple case) is recommended for clarity.
If you want to remove anything other than \'PERL\' from \'[A-Z]\', use \'[A-Z &
PERL]\' as well as \'[A-Z - [^PERL]]\'. Similarly, if you want to intersect
\'[A-Z]\' and a thing not \'JUNK\', use \'[A-Z - JUNK]\' as well as \'[A-Z &
[^JUNK]]\'.
For further examples, please see tests.
|
RPM found in directory: /packages/linux-pbone/ftp5.gwdg.de/pub/opensuse/repositories/devel:/languages:/perl:/CPAN-U/15.5/noarch |
