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package Regexp::Common::list; use Regexp::Common qw /pattern clean no_defaults/; use strict; use warnings; use vars qw /$VERSION/; $VERSION = '2010010201'; sub gen_list_pattern { my ($pat, $sep, $lsep) = @_; $lsep = $sep unless defined $lsep; return "(?k:(?:(?:$pat)(?:$sep))*(?:$pat)(?k:$lsep)(?:$pat))"; } my $defpat = '.*?\S'; my $defsep = '\s*,\s*'; pattern name => ['list', "-pat=$defpat", "-sep=$defsep", '-lastsep'], create => sub {gen_list_pattern (@{$_[1]}{-pat, -sep, -lastsep})}, ; pattern name => ['list', 'conj', '-word=(?:and|or)'], create => sub {gen_list_pattern($defpat, $defsep, '\s*,?\s*'.$_[1]->{-word}.'\s*'); }, ; pattern name => ['list', 'and'], create => sub {gen_list_pattern ($defpat, $defsep, '\s*,?\s*and\s*')}, ; pattern name => ['list', 'or'], create => sub {gen_list_pattern ($defpat, $defsep, '\s*,?\s*or\s*')}, ; 1; __END__ =pod =head1 NAME Regexp::Common::list -- provide regexes for lists =head1 SYNOPSIS use Regexp::Common qw /list/; while (<>) { /$RE{list}{-pat => '\w+'}/ and print "List of words"; /$RE{list}{-pat => $RE{num}{real}}/ and print "List of numbers"; } =head1 DESCRIPTION Please consult the manual of L<Regexp::Common> for a general description of the works of this interface. Do not use this module directly, but load it via I<Regexp::Common>. =head2 C<$RE{list}{-pat}{-sep}{-lastsep}> Returns a pattern matching a list of (at least two) substrings. If C<-pat=I<P>> is specified, it defines the pattern for each substring in the list. By default, I<P> is C<qr/.*?\S/>. In Regexp::Common 0.02 or earlier, the default pattern was C<qr/.*?/>. But that will match a single space, causing unintended parsing of C<a, b, and c> as a list of four elements instead of 3 (with C<-word> being C<(?:and)>). One consequence is that a list of the form "a,,b" will no longer be parsed. Use the pattern C<qr /.*?/> to be able to parse this, but see the previous remark. If C<-sep=I<P>> is specified, it defines the pattern I<P> to be used as a separator between each pair of substrings in the list, except the final two. By default I<P> is C<qr/\s*,\s*/>. If C<-lastsep=I<P>> is specified, it defines the pattern I<P> to be used as a separator between the final two substrings in the list. By default I<P> is the same as the pattern specified by the C<-sep> flag. For example: $RE{list}{-pat=>'\w+'} # match a list of word chars $RE{list}{-pat=>$RE{num}{real}} # match a list of numbers $RE{list}{-sep=>"\t"} # match a tab-separated list $RE{list}{-lastsep=>',\s+and\s+'} # match a proper English list Under C<-keep>: =over 4 =item $1 captures the entire list =item $2 captures the last separator =back =head2 C<$RE{list}{conj}{-word=I<PATTERN>}> An alias for C<< $RE{list}{-lastsep=>'\s*,?\s*I<PATTERN>\s*'} >> If C<-word> is not specified, the default pattern is C<qr/and|or/>. For example: $RE{list}{conj}{-word=>'et'} # match Jean, Paul, et Satre $RE{list}{conj}{-word=>'oder'} # match Bonn, Koln oder Hamburg =head2 C<$RE{list}{and}> An alias for C<< $RE{list}{conj}{-word=>'and'} >> =head2 C<$RE{list}{or}> An alias for C<< $RE{list}{conj}{-word=>'or'} >> =head1 SEE ALSO L<Regexp::Common> for a general description of how to use this interface. =head1 AUTHOR Damian Conway (damian@conway.org) =head1 MAINTAINANCE This package is maintained by Abigail S<(I<regexp-common@abigail.be>)>. =head1 BUGS AND IRRITATIONS Bound to be plenty. For a start, there are many common regexes missing. Send them in to I<regexp-common@abigail.be>. =head1 LICENSE and COPYRIGHT This software is Copyright (c) 2001 - 2009, Damian Conway and Abigail. This module is free software, and maybe used under any of the following licenses: 1) The Perl Artistic License. See the file COPYRIGHT.AL. 2) The Perl Artistic License 2.0. See the file COPYRIGHT.AL2. 3) The BSD Licence. See the file COPYRIGHT.BSD. 4) The MIT Licence. See the file COPYRIGHT.MIT. =cut