Moo::Role - Online Linux Manual PageSection : 3pm
Updated : 2020-11-27
Source : perl v5.32.0
Note : User Contributed Perl Documentation
NAMEMoo::Role − Minimal Object Orientation support for Roles
SYNOPSIS​ package My::Role; ​ ​ use Moo::Role; ​ use strictures 2; ​ ​ sub foo { ... } ​ ​ sub bar { ... } ​ ​ has baz => ( ​ is => 'ro', ​ ); ​ ​ 1; And elsewhere: ​ package Some::Class; ​ ​ use Moo; ​ use strictures 2; ​ ​ # bar gets imported, but not foo ​ with 'My::Role'; ​ ​ sub foo { ... } ​ ​ 1;
DESCRIPTION​Moo::Role builds upon Role::Tiny, so look there for most of the documentation on how this works (in particular, using Moo::Role also enables strict and warnings). The main addition here is extra bits to make the roles more ‟Moosey;” which is to say, it adds ‟has”.
IMPORTED SUBROUTINESSee ‟IMPORTED SUBROUTINES” in Role::Tiny for all the other subroutines that are imported by this module.
has​ has attr => ( ​ is => 'ro', ​ ); Declares an attribute for the class to be composed into. See ​‟has” in Moo for all options.
CLEANING UP IMPORTSMoo::Role cleans up its own imported methods and any imports declared before the use Moo::Role statement automatically. Anything imported after use Moo::Role will be composed into consuming packages. A package that consumes this role: ​ package My::Role::ID; ​ ​ use Digest::MD5 qw(md5_hex); ​ use Moo::Role; ​ use Digest::SHA qw(sha1_hex); ​ ​ requires 'name'; ​ ​ sub as_md5 { my ($self) = @_; return md5_hex($self−>name); } ​ sub as_sha1 { my ($self) = @_; return sha1_hex($self−>name); } ​ ​ 1; ​..will now have a $self−>sha1_hex() method available to it that probably does not do what you expect. On the other hand, a call to $self−>md5_hex() will die with the helpful error message: ​Can't locate object method "md5_hex". See ‟CLEANING UP IMPORTS” in Moo for more details.
SUPPORTSee Moo for support and contact information.
AUTHORSSee Moo for authors.
COPYRIGHT AND LICENSESee Moo for the copyright and license. 0
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