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Manual Reference Pages  -  ERROR::TYPETINY::ASSERTION (3)

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NAME

Error::TypeTiny::Assertion - exception when a value fails a type constraint

CONTENTS

STATUS

This module is covered by the Type-Tiny stability policy.

DESCRIPTION

This exception is thrown when a value fails a type constraint assertion.

This package inherits from Error::TypeTiny; see that for most documentation. Major differences are listed below:

    Attributes

type The type constraint that was checked against. Weakened links are involved, so this may end up being undef.
value The value that was tested.
varname The name of the variable that was checked, if known. Defaults to $_.
attribute_name If this exception was thrown as the result of an isa check or a failed coercion for a Moo attribute, then this will tell you which attribute (if your Moo is new enough).

(Hopefully one day this will support other OO frameworks.)

attribute_step If this exception was thrown as the result of an isa check or a failed coercion for a Moo attribute, then this will contain either "isa check" or "coercion" to indicate which went wrong (if your Moo is new enough).

(Hopefully one day this will support other OO frameworks.)

    Methods

has_type, has_attribute_name, has_attribute_step Predicate methods.
message Overridden to add varname to the message if defined.
explain Attempts to explain why the value did not pass the type constraint. Returns an arrayref of strings providing step-by-step reasoning; or returns undef if no explanation is possible.

BUGS

Please report any bugs to <http://rt.cpan.org/Dist/Display.html?Queue=Type-Tiny>.

SEE ALSO

Error::TypeTiny.

AUTHOR

Toby Inkster <tobyink@cpan.org>.

COPYRIGHT AND LICENCE

This software is copyright (c) 2013-2014 by Toby Inkster.

This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.

DISCLAIMER OF WARRANTIES

THIS PACKAGE IS PROVIDED AS IS AND WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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perl v5.20.3 ERROR::TYPETINY::ASSERTION (3) 2014-10-25

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