PPIx::Regexp::Structure::BranchReset - Represent a branch reset group

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

Index

Code Index:

NAME

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PPIx::Regexp::Structure::BranchReset - Represent a branch reset group

SYNOPSIS

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

INHERITANCE

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PPIx::Regexp::Structure::BranchReset is a PPIx::Regexp::Structure.

PPIx::Regexp::Structure::BranchReset has no descendants.

DESCRIPTION

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This class represents a branch reset group. That is, the construction (?|(...)|(...)|...). This is new with Perl 5.010.

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::Structure::BranchReset;

use strict;
use warnings;

use base qw{ PPIx::Regexp::Structure };

use Carp qw{ confess };

our $VERSION = '0.020';

# Called by the lexer to record the capture number.
sub __PPIX_LEXER__record_capture_number {
    my ( $self, $number ) = @_;
    defined $number
	or confess 'Programming error - initial $number is undef';
    my $original = $number;
    my $hiwater = $number;
    foreach my $kid ( $self->children() ) {
	if ( $kid->isa( 'PPIx::Regexp::Token::Operator' )
	    && $kid->content() eq '|' ) {
	    $number > $hiwater and $hiwater = $number;
	    $number = $original;
	} else {
	    $number = $kid->__PPIX_LEXER__record_capture_number( $number );
	}
    }
    return $number > $hiwater ? $number : $hiwater;
}

1;

__END__


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