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Parse::Eyapp::TokenGenUser Contributed Perl DocumentaParse::Eyapp::TokenGen(3)

NAME
       Parse::Eyapp::TokenGen - Support for Using Parse::Eyapp as a Data
       Generator

INTRODUCTION
       For a introduction to data generation using Parse::Eyapp see
       Parse::Eyapp::datagenerationtut.

METHODS
   set_tokengens
       Receives the parser object and the pairs

	   token => generator

       Sets the generator attribute of the tokens.  Though not strictly
       necessary, the generator is a Test::LectroTest::Generator object.

   set_weights
       Receives the parser object and the pairs

	   token => weight

       Sets the weight attribute of the tokens.	 The weight is a floating
       number.

   set_tokenweightsandgenerators
       Receives the parser object and the pairs

	   token => [weight, generator]

       or

	   token => weight

       and sets the weight and generator attributes of the tokens.  An example
       can be found in "examples/generator/GenSupport.pm":

	 $parser->set_tokenweightsandgenerators(
	   NUM => [ 2, Int(range=>[0, 9], sized=>0)],
	   VAR => [
		     0,	 # At the beginning, no variables are defined
		     Gen {
		       return  Elements(keys %st)->generate if keys %st;
		       return Int(range=>[0, 9], sized=>0)->generate;
		     },
		   ],
	   VARDEF => [
		       2,
		       String( length=>[1,2], charset=>"A-NP-Z", size => 100 )
		     ],
	   '=' => 2, '-' => 1, '+' => 2,
	   '*' => 4, '/' => 2, '^' => 0.5,
	   ';' => 1, '(' => 1, ')' => 2,
	   ''  => 2, 'error' => 0,
	 );

   token_weight
       Receives the parser object and the token and returns the weight.	 If an
       additional weight is provided the weight for the token is set.

   token_generator
       Receives the parser object and the token and returns the generator.  If
       an additional generator is provided the generator for the token is set.

   deltaweight
       Has the syntax:

	 $parser->deltaweight(TOKEN1 => deltaweight1, TOKEN2 => deltaweight2, ...)

       increases the weight of the respective token by the associated amount.

   pushdeltaweight
       As "deltaweight" but the current weights of the involved tokens are
       saved in a stack

   popweight
       Restores the weights of the tokens that were previously saved with
       "pushdeltaweight"

SEE ALSO
       ·   Parse::Eyapp::datagenerationtut

       ·   Test::LectroTest::Generator by Tom Moertel

       ·   The Design and Implementation of a Grammar-based Data Generator
	   (1992) by Peter M. Maurer, Software Practice and Experience
	   http://www.cs.ubc.ca/local/reading/proceedings/spe91-95/spe/./vol22/issue3/spe756pm.pdf
	   <http://www.cs.ubc.ca/local/reading/proceedings/spe91-95/spe/./vol22/issue3/spe756pm.pdf>

       ·   yagg: an easy-to-use generator for structured test inputs by David
	   Coppit and Jiexin Lian.  ASE '05: Proceedings of the 20th IEEE/ACM
	   international Conference on Automated software engineering.	2005,
	   pages 356-359.

	   · <http://search.cpan.org/perldoc?yagg::Tutorial>,

	   · <http://www.cs.wm.edu/~coppit/wiki/images/4/4e/yagg_short.pdf>,

	   · http://www.cs.wm.edu/~coppit/wiki/images/6/69/wm-cs-2005-13.pdf
	     <http://www.cs.wm.edu/~coppit/wiki/images/6/69/wm-cs-2005-13.pdf>

       ·   Writing Randomly by Randall Schwartz.  Linux Magazine Column 04
	   (Sep 1999).	<http://www.stonehenge.com/merlyn/LinuxMag/col04.html>

       ·   Generating Test Data with Enhanced Context Free Grammars by Peter
	   M. Maurer
	   http://cs.baylor.edu/~maurer/aida/dgl-source/documentation/gen_tst.pdf
	   <http://cs.baylor.edu/~maurer/aida/dgl-
	   source/documentation/gen_tst.pdf>

       ·   Modules as Programs by Brian d Foy
	   <http://www252.pair.com/comdog/mastering_perl/Chapters/18.modulinos.html>

       ·   How a Script Becomes a Module by Brian d Foy. On Perlmonks:
	   <http://www.perlmonks.org/index.pl?node_id=396759>.

CONTRIBUTORS
       · Hal Finkel <http://www.halssoftware.com/>

       · G. Williams <http://kasei.us/>

       · Thomas L. Shinnick <http://search.cpan.org/~tshinnic/>

       · Frank Leray

AUTHOR
       Casiano Rodriguez-Leon (casiano@ull.es)

ACKNOWLEDGMENTS
       This work has been supported by CEE (FEDER) and the Spanish Ministry of
       Educacion y Ciencia through Plan Nacional I+D+I number
       TIN2005-08818-C04-04 (ULL::OPLINK project <http://www.oplink.ull.es/>).
       Support from Gobierno de Canarias was through GC02210601 (Grupos
       Consolidados).  The University of La Laguna has also supported my work
       in many ways and for many years.

       A large percentage of  code is verbatim taken from Parse::Yapp 1.05.
       The author of Parse::Yapp is Francois Desarmenien.

       I wish to thank Francois Desarmenien for his Parse::Yapp module, to my
       students at La Laguna and to the Perl Community. Thanks to the people
       who have contributed to improve the module (see "CONTRIBUTORS" in
       Parse::Eyapp).  Thanks to Larry Wall for giving us Perl.	 Special
       thanks to Juana.

LICENCE AND COPYRIGHT
       Copyright (c) 2006-2008 Casiano Rodriguez-Leon (casiano@ull.es). All
       rights reserved.

       Parse::Yapp copyright is of Francois Desarmenien, all rights reserved.
       1998-2001

       These modules are free software; you can redistribute it and/or modify
       it under the same terms as Perl itself. See perlartistic.

       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 v5.16.2			  2012-03-23	     Parse::Eyapp::TokenGen(3)
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