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Manual Reference Pages  -  MOOSEX::META::TYPECONSTRAINT::STRUCTURED (3)

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NAME

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

CONTENTS

VERSION

version 0.35

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

METHODS

    validate

Messing with validate so that we can support nicer 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

    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

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

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

SEE ALSO

The following modules or resources may be of interest.

Moose, Moose::Meta::TypeConstraint

SUPPORT

Bugs may be submitted through the RT bug tracker <https://rt.cpan.org/Public/Dist/Display.html?Name=MooseX-Types-Structured> (or bug-MooseX-Types-Structured@rt.cpan.org <mailto:bug-MooseX-Types-Structured@rt.cpan.org>).

There is also a mailing list available for users of this distribution, at <http://lists.perl.org/list/moose.html>.

There is also an irc channel available for users of this distribution, at <irc://irc.perl.org/#moose>.

AUTHORS

o John Napiorkowski <jjnapiork@cpan.org>
o Florian Ragwitz <rafl@debian.org>
o XXXX XXXXX (Yuval Kogman) <nothingmuch@woobling.org>
o Tomas (t0m) Doran <bobtfish@bobtfish.net>
o Robert Sedlacek <rs@474.at>

COPYRIGHT AND LICENSE

This software is copyright (c) 2008 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.

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