Role::HasPayload::Merged - merge autogenerated payload with constructor-specified payload
version 0.006
package Example; use Moose; with qw(Role::HasPayload::Merged); sub Payload { 'Role::HasPayload::Meta::Attribute::Payload' } has height => ( is => 'ro', traits => [ Payload ], ); has width => ( is => 'ro', traits => [ Payload ], ); has color => ( is => 'ro', );
...then...
my $example = Example->new({ height => 10, width => 20, color => 'blue', payload => { depth => 30 }, }); $example->payload; # { height => 10, width => 20, depth => 30 }
Role::HasPayload::Merged provides a payload
method and a payload
attribute. It computes the result of the payload
method when it's called, first by gathering the values of attributes marked with Role::HasPayload::Meta::Attribute::Payload, then by merging in the contents of the payload
attribute (provided at construction).
If an entry in the constructor-provided payload already exists in the autogenerated payload, a warning is issued and the autogenerated value is used.
For a bit more on the autogenerated payload, see Role::HasPayload::Auto.
This role is especially useful when combined with Role::HasMessage::Errf.
Ricardo Signes <rjbs@cpan.org>
This software is copyright (c) 2013 by Ricardo Signes.
This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.