libparams-validate-perl | validate parameters to Perl method/function calls | Mehr ...
The Params::Validate module provides a flexible system for validating method/function call parameters. The validation can be as simple as checking for the presence of required parameters or as complex as validating object classes (via isa) or capabilities (via can), checking parameter types, and using customized callbacks to ensure data integrity. . The module has been designed to work equally well with positional or named parameters (via a hash or hash reference). . An attribute based implementation of this idea is also included as Attribute::Params::Validate, but it doesn't currently have all the features of the non-attribute version, and its use in production systems is not recommended.
