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Manual Reference Pages  -  MODERN::PERL (3)

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Modern::Perl - enable all of the features of Modern Perl with one import



version 1.20150127


Modern Perl programs use several modules to enable additional features of Perl and of the CPAN. Instead of copying and pasting all of these use lines, instead write only one:

    use Modern::Perl;

This enables the strict and warnings pragmas, as well as all of the features available in Perl 5.10. It also enables C3 method resolution order as documented in perldoc mro and loads IO::File and IO::Handle so that you may call methods on filehandles. In the future, it may include additional core modules and pragmas.

Because so much of this module’s behavior uses lexically scoped pragmas, you may disable these pragmas within an inner scope with:

    no Modern::Perl;

See <> for more information, <> for further discussion of Modern Perl and its implications, and <> for a freely-downloadable Modern Perl tutorial.

    Forward Compatibility

For forward compatibility, I recommend you specify a year as the single optional import tag. For example:

    use Modern::Perl 2009;
    use Modern::Perl 2010;

... both enable 5.10 features, while:

    use Modern::Perl 2011;

... enables 5.12 features:

    use Modern::Perl 2012;

... enables 5.14 features:

    use Modern::Perl 2013;

... enables 5.16 features, and:

    use Modern::Perl 2014;

... enables 5.18 features, and:

    use Modern::Perl 2015;

... enables 5.20 features.

Obviously you cannot use newer features on earlier versions. Perl will throw the appropriate exception if you try.

By mid-2014, this module will drop support for 5.10 and 5.12 and will complain (once per process) if you use a year too old. As of January 2014, Perl 5.14 is unsupported by the Perl 5 Porters, so please consider upgrading.


chromatic, <chromatic at>


None reported.

Please report any bugs or feature requests to bug-modern-perl at, or through the web interface at <>. I will be notified, and then you’ll automatically be notified of progress on your bug as I make changes.


You can find documentation for this module with the perldoc command.

    perldoc Modern::Perl

You can also look for information at:
o RT: CPAN’s request tracker


o AnnoCPAN: Annotated CPAN documentation


o CPAN Ratings


o Search CPAN



Damian Conway (inspiration from Toolkit), Florian Ragwitz (B::Hooks::Parser, so I didn’t have to write it myself), chocolateboy (for suggesting that I don’t even need B::Hooks::Parser), Damien Learns Perl, David Moreno, Evan Carroll, Elliot Shank, Andreas Koenig, Father Chrysostomos, and Norbert E. Gruener for reporting bugs, filing patches, and requesting features.


Copyright 2009-2014 chromatic, all rights reserved.

This program is free software; you can redistribute it and/or modify it under the same terms as Perl 5.18 itself.




This software is copyright (c) 2015 by

This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.

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perl v5.20.3 MODERN::PERL (3) 2016-03-17

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