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Postings from June 2011
Hi. I've pushed some suggested changes as 'topic/validation-passthrough-objects' for Moose::Meta::Attribute to permit the validation phase to pass-through any results from type constraints 'get_message' function if they so happen to be objects ( or any other kind of ref ). The idea is that we can be permitted to create more deeply structured validation failures ( ie: Exception Objects ) that more accurately describe why the validation failed. This is more pertinent with nested/parametrized type constraints. Presently, no native type constraints throw exceptions, and the system relies completely on string error messages. I have, alternatively, a module that will hack this behaviour on to attributes on a case-by-case basis ( http://search.cpan.org/dist/MooseX-Attribute-ValidateWithException/ ) but I'd much rather do away with that forever and make something much more powerful and practical as part of Moose itself. Critique welcome. For those who do not wish to have to use git directly to see the proposed changes, here is a link to the diff on github: https://github.com/moose/moose/compare/master...topic/validation-passthrough-objects -- Kentnl