Florian Ragwitz


MooseX::Meta::TypeConstraint::ForceCoercion - Force coercion when validating type constraints


version 0.01


    use MooseX::Types:::Moose qw/Str Any/;
    use Moose::Util::TypeConstraints;
    use MooseX::Meta::TypeConstraint::ForceCoercion;

    # get any type constraint
    my $tc = Str;

    # declare one or more coercions for it
    coerce $tc,
        from Any,
        via { ... };

    # wrap the $tc to force coercion
    my $coercing_tc = MooseX::Meta::TypeConstraint::ForceCoercion->new(
        type_constraint => $tc,

    # check a value against new type constraint. this will run the type
    # coercions for the wrapped type, even if the value already passes
    # validation before coercion. it will fail if the value couldn't be
    # coerced


This class allows to wrap any Moose::Meta::TypeConstraint in a way that will force coercion of the value when checking or validating a value against it.



The type constraint to wrap. All methods except for validate and check are delegated to the value of this attribute.


check ($value)

Same as Moose::Meta::TypeConstraint::check, except it will always try to coerce $value before checking it against the actual type constraint. If coercing fails the check will fail, too.

validate ($value, $coerced_ref?)

Same as Moose::Meta::TypeConstraint::validate, except it will always try to coerce $value before validating it against the actual type constraint. If coercing fails the validation will fail, too.

If coercion was successful and a $coerced_ref references was passed, the coerced value will be stored in that.


  Florian Ragwitz <rafl@debian.org>


This software is copyright (c) 2009 by Florian Ragwitz.

This is free software; you can redistribute it and/or modify it under the same terms as perl itself.

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