PPIx::Regexp::Token::GroupType::Switch - Represent the introducing characters for a switch

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

Index

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NAME

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PPIx::Regexp::Token::GroupType::Switch - Represent the introducing characters for a switch

SYNOPSIS

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 use PPIx::Regexp::Dumper;
 PPIx::Regexp::Dumper->new( 'qr{(?(1)foo|bar)}smx' )
     ->print();

INHERITANCE

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PPIx::Regexp::Token::GroupType::Switch is a PPIx::Regexp::Token::GroupType.

PPIx::Regexp::Token::GroupType::Switch has no descendants.

DESCRIPTION

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This class represents the characters right after a left parenthesis that introduce a switch. Strictly speaking these characters are '?(', but this class only takes the '?'.

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::GroupType::Switch;

use strict;
use warnings;

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

our $VERSION = '0.020';

sub perl_version_introduced {
#   my ( $self ) = @_;
    return '5.005';
}

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

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

    # The optional escape is because any non-open-bracket character may
    # appear as the regular expression delimiter.
    if ( my $accept = $tokenizer->find_regexp(
	    qr{ \A \\? \? \( }smx ) ) {

	# Leave the left paren, since it belongs to the condition.
	--$accept;

	$tokenizer->expect( qw{
	    PPIx::Regexp::Token::Condition
	    } );

	return $accept;

    }

    return;

}

1;

__END__


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