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MooseX::Meta::TypeConstraint::Structured(3)ontributed Perl Documentation:Meta::TypeConstraint::Structured(3)



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.



perl v5.12.5                                     2011-10-03      MooseX::Meta::TypeConstraint::Structured(3)