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Adam Kennedy > Perl-Metrics2-0.06 > Perl::Metrics2::Plugin::Core



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Perl::Metrics2::Plugin::Core - The Core Perl Metrics Package


This class provides a set of core metrics for Perl documents, based on very simple code using only the core PPI package.


As with all Perl::Metrics::Plugin packages, all metrics can be referenced with the global identifier Perl::Metrics::Plugin::Core::metric.

Metrics are listed as "datatype name".

integer bytes

The bytes metric represents the number of bytes in the file.

integer lines

The lines metric represents the number of raw lines in the file.

integer sloc

The sloc metric represents Source Lines of Code. That is, raw lines minus __END__ content, __DATA__ content, POD, comments and blank lines.

integer tokens

The tokens metric represents the total number of PPI::Token objects contained in the document.

For example, the following one-line document would have a tokens metric of 5 (assuming a single trailing newline)

  print "Hello World!\n";

integer significant_tokens

The significant_tokens metric represents the total number of significant tokens contained in the document.

This filters out things like whitespace and comments, and refers (more or less) to only the parts of the document that actually do something.

For more information on significance, see "significant" in PPI::Element.


Bugs should be reported via the CPAN bug tracker at

For other issues, contact the author.


Adam Kennedy <>


Perl::Metrics::Plugin, Perl::Metrics, PPI


Copyright 2009 Adam Kennedy.

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

The full text of the license can be found in the LICENSE file included with this module.

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