03-23-2009
Regexp help -- (a*)(b*|(ab)*) and (a*)((b|ab)*) on "aabab"
Hi all
A regular expression question -- (a*)(b*|(ab)*) and (a*)((b|ab)*) on "aabab"
First, (a*)(b*|(ab)*) on "aabab". I though it would match "aa-b". But it turns on "a-abab". So why isn't a* greedy here?
Then I try (a*)((b|ab)*). It also matches aa-bab. But this time a* is greedy here. Why ?
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LEARN ABOUT CENTOS
ppix::regexp::structure::unknown
PPIx::Regexp::Structure::Unknown(3) User Contributed Perl Documentation PPIx::Regexp::Structure::Unknown(3)
NAME
PPIx::Regexp::Structure::Unknown - Represent an unknown structure.
SYNOPSIS
use PPIx::Regexp::Dumper;
PPIx::Regexp::Dumper->new( 'qr{(?(foo)bar|baz|burfle)}smx' )
->print();
INHERITANCE
"PPIx::Regexp::Structure::Unknown" is a PPIx::Regexp::Structure.
"PPIx::Regexp::Structure::Unknown" has no descendants.
DESCRIPTION
This class is used for a structure which the lexer recognizes as being improperly constructed.
METHODS
This class provides no public methods beyond those provided by its superclass.
SUPPORT
Support is by the author. Please file bug reports at <http://rt.cpan.org>, or in electronic mail to the author.
AUTHOR
Thomas R. Wyant, III wyant at cpan dot org
COPYRIGHT AND LICENSE
Copyright (C) 2009-2013 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.
perl v5.16.3 2014-06-10 PPIx::Regexp::Structure::Unknown(3)