libmoosex-params-validate-perl | Perl module to validate Moose method parameters | Mehr ...
MooseX::Params::Validate fills a gap in Moose by adding method parameter validation to Moose, providing a simple way to verify that incoming parameters are of the appropriate Moose types and roles. This module is just one of many developing options to do this sort of thing; it should not yet be considered the "official" way to validate parameters.
