Toby Inkster > Type-API-0.001 > Type::API::Constraint::Coercible

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NAME ^

Type::API::Constraint::Coercible - allows values failing the type constraint to be converted to another value that passes

INTERFACE ^

Implementations of Type::API::Constraint::Coercible MUST also implement Type::API::Constraint.

Implementations MUST provide the following methods:

$constraint->has_coercion

Returns a boolean indicating whether a coercion is available for this type constraint.

$constraint->coerce($value)

Attempts to coerce the value into a value that would pass the type constraint; this method returns the new value. This method offers no guarantee that the returned value passes the constraint; that must be checked with check.

Implementations MAY advertise that they support this interface by returning true for $constraint->DOES("Type::API::Constraint::Coercible").

SEE ALSO ^

Implementations

The following CPAN classes are known to implement Type::API::Constraint::Coercible:

Consumers

Some tools can make use of objects implementing Type::API::Constraint::Coercible:

Others, such as Moose and Mouse require type constraints that implement a superset of this functionality.

AUTHOR ^

Toby Inkster <tobyink@cpan.org>.

COPYRIGHT AND LICENCE ^

This software is copyright (c) 2013 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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