PPIx::Regexp::Token::CharClass::POSIX - Represent a POSIX character class

PPIx-Regexp documentation Contained in the PPIx-Regexp distribution.

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NAME

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PPIx::Regexp::Token::CharClass::POSIX - Represent a POSIX character class

SYNOPSIS

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 use PPIx::Regexp::Dumper;
 PPIx::Regexp::Dumper->new( 'qr{ [[:alpha:]] }smx' )
     ->print();

INHERITANCE

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PPIx::Regexp::Token::CharClass::POSIX is a PPIx::Regexp::Token::CharClass.

PPIx::Regexp::Token::CharClass::POSIX has no descendants.

DESCRIPTION

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This class represents a POSIX character class. It will only be recognized within a character class.

Note that collating symbols (e.g. [.ch.]) and equivalence classes (e.g. [=a=]) are valid in the POSIX standard, but are not valid in Perl regular expressions. These end up being represented by PPIx::Regexp::Token::CharClass::Posix::Unknown (PPIx::Regexp::Token::CharClass::Posix::Unknown), and are considered a parse failure.

METHODS

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This class provides no public methods beyond those provided by its superclass.

SUPPORT

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Support is by the author. Please file bug reports at http://rt.cpan.org, or in electronic mail to the author.

AUTHOR

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Thomas R. Wyant, III wyant at cpan dot org

COPYRIGHT AND LICENSE

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Copyright (C) 2009-2011 by Thomas R. Wyant, III

This program is free software; you can redistribute it and/or modify it under the same terms as Perl 5.10.0. For more details, see the full text of the licenses in the directory LICENSES.

This program is distributed in the hope that it will be useful, but without any warranty; without even the implied warranty of merchantability or fitness for a particular purpose.

PPIx-Regexp documentation Contained in the PPIx-Regexp distribution. 
package PPIx::Regexp::Token::CharClass::POSIX;

use strict;
use warnings;

use base qw{ PPIx::Regexp::Token::CharClass };

use PPIx::Regexp::Constant qw{ COOKIE_CLASS MINIMUM_PERL };

our $VERSION = '0.020';

# Return true if the token can be quantified, and false otherwise
# sub can_be_quantified { return };

sub perl_version_introduced {
#   my ( $self ) = @_;
    return '5.006';
}

{

    my %class = (
	':' => __PACKAGE__,
    );

    sub __PPIX_TOKENIZER__regexp {
	my ( $class, $tokenizer, $character ) = @_;

	$tokenizer->cookie( COOKIE_CLASS ) or return;

	if ( my $accept = $tokenizer->find_regexp(
		qr{ \A [[] ( [.=:] ) \^? .*? \1 []] }smx ) ) {
	    my ( $punc ) = $tokenizer->capture();
	    return $tokenizer->make_token( $accept,
		$class{$punc} || __PACKAGE__ . '::Unknown' );
	}

	return;

    }

}

1;

__END__


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