Roles with composition parameters
Your parameterized role consists of two new things: parameter declarations
and a 'role' block.
Parameters are declared using the the /parameter manpage keyword which very
much resembles the Moose/has manpage. You can use any option that the
Moose/has manpage accepts. The default value for the 'is' option is 'ro' as
that's a very common case. Use 'is => 'bare'' if you want no accessor.
These parameters will get their values when the consuming class (or role)
uses the Moose/with manpage. A parameter object will be constructed with
these values, and passed to the 'role' block.
The 'role' block then uses the usual the Moose::Role manpage keywords to
build up a role. You can shift off the parameter object to inspect what the
consuming class provided as parameters. You use the parameters to customize
your role however you wish.
There are many possible implementations for parameterized roles (hopefully
with a consistent enough API); I believe this to be the easiest and most
flexible design. Coincidentally, Pugs originally had an eerily similar
design.
See the MooseX::Role::Parameterized::Extending manpage for some tips on how
to extend this module.
- Developed at devel:languages:perl
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Source Files
| Filename | Size | Changed |
|---|---|---|
| MooseX-Role-Parameterized-1.00.tar.gz | 0000034386 33.6 KB | |
| perl-MooseX-Role-Parameterized-old_Test_More.patch | 0000001153 1.13 KB | |
| perl-MooseX-Role-Parameterized.changes | 0000003004 2.93 KB | |
| perl-MooseX-Role-Parameterized.spec | 0000004679 4.57 KB |
Revision 5 (latest revision is 14)
Stephan Kulow (coolo)
accepted
request 107129
from
Stephan Kulow (coolo)
(revision 5)
- updated to 1.00
* MooseX::Role::Parameterized now depends on Moose 2.0300
released 2011-09-23 for its several core improvements, hence the
major version number bump.
* MXRP now uses the new meta_lookup feature added to Moose 2.0300
(specifically for MXRP) to avoid duplicating Moose-0.60-era
Moose::Role sugar. This means the error messages you get are
better, and there's a lot less ugly code in MXRP.
* Remove alias/excludes special case errors. They have long since been
replaced in core Moose by -alias and -excludes, and were finally
removed in Moose 2.0200.
* Expressly forbid using role { } inside role { } (which makes no
sense but I suppose you could accidentally trigger it)
* Documentation fix from cweyl@alumni.drew.edu
https://github.com/sartak/MooseX-Role-Parameterized/pull/5
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