NAME¶

MooseX::Meta::TypeConstraint::Structured - MooseX::Meta::TypeConstraint::Structured - Structured type constraints.

DESCRIPTION¶

A structure is a set of Moose::Meta::TypeConstraint that are 'aggregated' in such a way as that they are all applied to an incoming list of arguments. The idea here is that a Type Constraint could be something like, "An Int followed by an Int and then a Str" and that this could be done so with a declaration like:

    Tuple[Int,Int,Str]; ## Example syntax

So a structure is a list of Type constraints (the "Int,Int,Str" in the above example) which are intended to function together.

ATTRIBUTES¶

type_constraints¶

A list of Moose::Meta::TypeConstraint objects.

constraint_generator¶

A subref or closure that contains the way we validate incoming values against a set of type constraints.

METHODS¶

validate¶

Messing with validate so that we can support niced error messages.

generate_constraint_for ($type_constraints)¶

Given some type constraints, use them to generate validation rules for an ref of values (to be passed at check time)

parameterize (@type_constraints)¶

Given a ref of type constraints, create a structured type.

__infer_constraint_generator¶

This returns a CODEREF which generates a suitable constraint generator. Not user servicable, you'll never call this directly.

compile_type_constraint¶

hook into compile_type_constraint so we can set the correct validation rules.

create_child_type¶

modifier to make sure we get the constraint_generator

is_a_type_of¶

is_subtype_of¶

equals¶

Override the base class behavior.

type_constraints_equals¶

Checks to see if the internal type constraints are equal.

get_message¶

Give you a better peek into what's causing the error. For now we stringify the incoming deep value with Devel::PartialDump and pass that on to either your custom error message or the default one. In the future we'll try to provide a more complete stack trace of the actual offending elements

SEE ALSO¶

The following modules or resources may be of interest. Moose, Moose::Meta::TypeConstraint

AUTHORS¶

•

John Napiorkowski <jjnapiork@cpan.org>

•

Florian Ragwitz <rafl@debian.org>

•

Yuval Kogman <nothingmuch@woobling.org>

•

Tomas Doran <bobtfish@bobtfish.net>

•

Robert Sedlacek <rs@474.at>

COPYRIGHT AND LICENSE¶

This software is copyright (c) 2011 by John Napiorkowski. This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.