PPIx::Regexp::Token::Reference - Represent a reference to a capture

 use PPIx::Regexp::Dumper;
 PPIx::Regexp::Dumper->new( 'qr{\1}smx' )
     ->print();

PPIx::Regexp::Token::Reference is a PPIx::Regexp::Token.

PPIx::Regexp::Token::Reference is the parent of PPIx::Regexp::Token::Backreference, PPIx::Regexp::Token::Condition and PPIx::Regexp::Token::Recursion.

This abstract class represents a reference to a capture buffer, either numbered or named. It should never be instantiated, but it provides a number of methods to its subclasses.

This class provides the following public methods. Methods not documented here are private, and unsupported in the sense that the author reserves the right to change or remove them without notice.

 print "The absolute reference is ", $ref->absolute(), "\n";

This method returns the absolute number of the capture buffer referred to. This is the same as number() for unsigned numeric references. If the reference is to a named buffer, undef is returned.

 $ref->is_named and print "named reference\n";

This method returns true if the reference is named rather than numbered.

 $ref->is_relative()
     and print "relative numbered reference\n";

This method returns true if the reference is numbered and it is a relative number (i.e. if it is signed).

 print "The name is ", $ref->name(), "\n";

This method returns the name of the capture buffer referred to. In the case of a reference to a numbered capture (i.e. is_named returns false), this method returns undef.

 print "The number is ", $ref->number(), "\n";

This method returns the number of the capture buffer referred to. In the case of a reference to a named capture (i.e. is_named returns true), this method returns undef.

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

Thomas R. Wyant, III wyant at cpan dot org

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.