Pod::Simple::PullParser(3pm)				 Perl Programmers Reference Guide			      Pod::Simple::PullParser(3pm)

NAME

       Pod::Simple::PullParser -- a pull-parser interface to parsing Pod

SYNOPSIS

	my $parser = SomePodProcessor->new;
	$parser->set_source( "whatever.pod" );
	$parser->run;

       Or:

	my $parser = SomePodProcessor->new;
	$parser->set_source( $some_filehandle_object );
	$parser->run;

       Or:

	my $parser = SomePodProcessor->new;
	$parser->set_source( $document_source );
	$parser->run;

       Or:

	my $parser = SomePodProcessor->new;
	$parser->set_source( @document_lines );
	$parser->run;

       And elsewhere:

	require 5;
	package SomePodProcessor;
	use strict;
	use base qw(Pod::Simple::PullParser);

	sub run {
	  my $self = shift;
	 Token:
	  while(my $token = $self->get_token) {
	    ...process each token...
	  }
	}

DESCRIPTION

       This class is for using Pod::Simple to build a Pod processor -- but one that uses an interface based on a stream of token objects, instead
       of based on events.

       This is a subclass of Pod::Simple and inherits all its methods.

       A subclass of Pod::Simple::PullParser should define a "run" method that calls "$token = $parser->get_token" to pull tokens.

       See the source for Pod::Simple::RTF for an example of a formatter that uses Pod::Simple::PullParser.

METHODS

       my $token = $parser->get_token
	   This returns the next token object (which will be of a subclass of Pod::Simple::PullParserToken), or undef if the parser-stream has hit
	   the end of the document.

       $parser->unget_token( $token )
       $parser->unget_token( $token1, $token2, ... )
	   This restores the token object(s) to the front of the parser stream.

       The source has to be set before you can parse anything.	The lowest-level way is to call "set_source":

       $parser->set_source( $filename )
       $parser->set_source( $filehandle_object )
       $parser->set_source( $document_source )
       $parser->set_source( @document_lines )

       Or you can call these methods, which Pod::Simple::PullParser has defined to work just like Pod::Simple's same-named methods:

       $parser->parse_file(...)
       $parser->parse_string_document(...)
       $parser->filter(...)
       $parser->parse_from_file(...)

       For those to work, the Pod-processing subclass of Pod::Simple::PullParser has to have defined a $parser->run method -- so it is advised
       that all Pod::Simple::PullParser subclasses do so.  See the Synopsis above, or the source for Pod::Simple::RTF.

       Authors of formatter subclasses might find these methods useful to call on a parser object that you haven't started pulling tokens from
       yet:

       my $title_string = $parser->get_title
	   This tries to get the title string out of $parser, by getting some tokens, and scanning them for the title, and then ungetting them so
	   that you can process the token-stream from the beginning.

	   For example, suppose you have a document that starts out:

	     =head1 NAME

	     Hoo::Boy::Wowza -- Stuff B<wow> yeah!

	   $parser->get_title on that document will return "Hoo::Boy::Wowza -- Stuff wow yeah!". If the document starts with:

	     =head1 Name

	     Hoo::Boy::W00t -- Stuff B<w00t> yeah!

	   Then you'll need to pass the "nocase" option in order to recognize "Name":

	     $parser->get_title(nocase => 1);

	   In cases where get_title can't find the title, it will return empty-string ("").

       my $title_string = $parser->get_short_title
	   This is just like get_title, except that it returns just the modulename, if the title seems to be of the form "SomeModuleName --
	   description".

	   For example, suppose you have a document that starts out:

	     =head1 NAME

	     Hoo::Boy::Wowza -- Stuff B<wow> yeah!

	   then $parser->get_short_title on that document will return "Hoo::Boy::Wowza".

	   But if the document starts out:

	     =head1 NAME

	     Hooboy, stuff B<wow> yeah!

	   then $parser->get_short_title on that document will return "Hooboy, stuff wow yeah!". If the document starts with:

	     =head1 Name

	     Hoo::Boy::W00t -- Stuff B<w00t> yeah!

	   Then you'll need to pass the "nocase" option in order to recognize "Name":

	     $parser->get_short_title(nocase => 1);

	   If the title can't be found, then get_short_title returns empty-string ("").

       $author_name   = $parser->get_author
	   This works like get_title except that it returns the contents of the "=head1 AUTHOR

Paragraph...
" section, assuming that that
	   section isn't terribly long. To recognize a "=head1 Author

Paragraph
" section, pass the "nocase" otpion:

	     $parser->get_author(nocase => 1);

	   (This method tolerates "AUTHORS" instead of "AUTHOR" too.)

       $description_name = $parser->get_description
	   This works like get_title except that it returns the contents of the "=head1 DESCRIPTION

Paragraph...
" section, assuming that that
	   section isn't terribly long. To recognize a "=head1 Description

Paragraph
" section, pass the "nocase" otpion:

	     $parser->get_description(nocase => 1);

       $version_block = $parser->get_version
	   This works like get_title except that it returns the contents of the "=head1 VERSION

[BIG BLOCK]
" block.  Note that this does NOT
	   return the module's $VERSION!! To recognize a "=head1 Version

[BIG BLOCK]
" section, pass the "nocase" otpion:

	     $parser->get_version(nocase => 1);

NOTE

       You don't actually have to define a "run" method.  If you're writing a Pod-formatter class, you should define a "run" just so that users
       can call "parse_file" etc, but you don't have to.

       And if you're not writing a formatter class, but are instead just writing a program that does something simple with a Pod::PullParser
       object (and not an object of a subclass), then there's no reason to bother subclassing to add a "run" method.

SEE ALSO

       Pod::Simple

       Pod::Simple::PullParserToken -- and its subclasses Pod::Simple::PullParserStartToken, Pod::Simple::PullParserTextToken, and
       Pod::Simple::PullParserEndToken.

       HTML::TokeParser, which inspired this.

SUPPORT

       Questions or discussion about POD and Pod::Simple should be sent to the pod-people@perl.org mail list. Send an empty email to
       pod-people-subscribe@perl.org to subscribe.

       This module is managed in an open GitHub repository, http://github.com/theory/pod-simple/ <http://github.com/theory/pod-simple/>. Feel free
       to fork and contribute, or to clone git://github.com/theory/pod-simple.git <git://github.com/theory/pod-simple.git> and send patches!

       Patches against Pod::Simple are welcome. Please send bug reports to <bug-pod-simple@rt.cpan.org>.

COPYRIGHT AND DISCLAIMERS

       Copyright (c) 2002 Sean M. Burke.

       This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

       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.

AUTHOR

       Pod::Simple was created by Sean M. Burke <sburke@cpan.org>.  But don't bother him, he's retired.

       Pod::Simple is maintained by:

       o   Allison Randal "allison@perl.org"

       o   Hans Dieter Pearcey "hdp@cpan.org"

       o   David E. Wheeler "dwheeler@cpan.org"

perl v5.12.1							    2010-05-07					      Pod::Simple::PullParser(3pm)