# phpman > info > Type::Tiny::Manual::Policies

[Type::Tiny::Manual::PoUsereContributed](https://www.chedong.com/phpMan.php/perldoc/Type%3A%3ATiny%3A%3AManual%3A%3APoUsereContributed/markdown) Perl [DType::Tiny::Manual](https://www.chedong.com/phpMan.php/perldoc/DType%3A%3ATiny%3A%3AManual/markdown)::[Policies(3pm)](https://www.chedong.com/phpMan.php/man/Policies/3pm/markdown)

NAME
       [Type::Tiny::Manual::Policies](https://www.chedong.com/phpMan.php/perldoc/Type%3A%3ATiny%3A%3AManual%3A%3APolicies/markdown) - [Type::Tiny](https://www.chedong.com/phpMan.php/perldoc/Type%3A%3ATiny/markdown) policies

MANUAL
   [Type::Tiny](https://www.chedong.com/phpMan.php/perldoc/Type%3A%3ATiny/markdown) Stability Policy
       [Type::Tiny](https://www.chedong.com/phpMan.php/perldoc/Type%3A%3ATiny/markdown) 1.000000 is considered stable. Any changes to the API that
       are big enough to require changes to the test suite will be preceded by
       a six month notice period, with the following exceptions:

       o   Any changes which are necessary to maintain compatibility with new
           releases of Moose, Moo, and other software that [Type::Tiny](https://www.chedong.com/phpMan.php/perldoc/Type%3A%3ATiny/markdown) needs to
           integrate with.

       o   Changes to maintain compatibility with future versions of Perl
           itself.

       o   Where a change fixes a contradiction between the implementation and
           documentation of [Type::Tiny](https://www.chedong.com/phpMan.php/perldoc/Type%3A%3ATiny/markdown).

       o   Where a feature is explicitly documented as being "experimental" or
           "unstable".

       o   Improvements to the text of error messages.

   Experimental and Unstable [Type::Tiny](https://www.chedong.com/phpMan.php/perldoc/Type%3A%3ATiny/markdown) Features
       The following list is currently non-exhaustive.

       o   The following type checks result may vary based on your version of
           Perl and whether [Type::Tiny::XS](https://www.chedong.com/phpMan.php/perldoc/Type%3A%3ATiny%3A%3AXS/markdown) is installed. Their outcome is
           currently considered undefined, and may change in future versions.

           o   Using Object and similar type checks on unblessed regular
               expression references, the outcome is undefined.

           o   On all current versions of Perl, false ("!!0") stringifies to
               the empty string (but using [Devel::Peek](https://www.chedong.com/phpMan.php/perldoc/Devel%3A%3APeek/markdown) you can tell the
               difference between this value and a normal empty string), so
               Int and subtypes of Int do not consider it to be an integer. If
               Perl's behaviour ever changes, you might not be able to rely on
               this outcome. True ("!!1") stringifies as "1", so is considered
               an integer.

           o   A glob (not a globref but an actual glob) currently passes the
               StringLike type constraint but not the Str type constraint.

       o   [Type::Tiny](https://www.chedong.com/phpMan.php/perldoc/Type%3A%3ATiny/markdown)'s "my_methods" attribute and the functionality it
           provides is experimental.

       o   The parameterizable coercion API is subject to change.

       o   The interaction of deep coercions and mutable coercions currently
           results in ill-defined behaviour. This could change at any time.

       o   [Type::Registry](https://www.chedong.com/phpMan.php/perldoc/Type%3A%3ARegistry/markdown)'s ability to import [MooseX::Types](https://www.chedong.com/phpMan.php/perldoc/MooseX%3A%3ATypes/markdown) and [MouseX::Types](https://www.chedong.com/phpMan.php/perldoc/MouseX%3A%3ATypes/markdown)
           type libraries is experimental.

       o   These modules are considered part of [Type::Tiny](https://www.chedong.com/phpMan.php/perldoc/Type%3A%3ATiny/markdown)'s internals, and
           not covered by the stability policy: [Devel::TypeTiny::Perl56Compat](https://www.chedong.com/phpMan.php/perldoc/Devel%3A%3ATypeTiny%3A%3APerl56Compat/markdown),
           [Devel::TypeTiny::Perl58Compat](https://www.chedong.com/phpMan.php/perldoc/Devel%3A%3ATypeTiny%3A%3APerl58Compat/markdown), [Type::Coercion::FromMoose](https://www.chedong.com/phpMan.php/perldoc/Type%3A%3ACoercion%3A%3AFromMoose/markdown),
           [Type::Tiny::_HalfOp](https://www.chedong.com/phpMan.php/perldoc/Type%3A%3ATiny%3A%3AHalfOp/markdown), [Types::Standard::ArrayRef](https://www.chedong.com/phpMan.php/perldoc/Types%3A%3AStandard%3A%3AArrayRef/markdown),
           [Types::Standard::CycleTuple](https://www.chedong.com/phpMan.php/perldoc/Types%3A%3AStandard%3A%3ACycleTuple/markdown), [Types::Standard::Dict](https://www.chedong.com/phpMan.php/perldoc/Types%3A%3AStandard%3A%3ADict/markdown),
           [Types::Standard::HashRef](https://www.chedong.com/phpMan.php/perldoc/Types%3A%3AStandard%3A%3AHashRef/markdown), [Types::Standard::Map](https://www.chedong.com/phpMan.php/perldoc/Types%3A%3AStandard%3A%3AMap/markdown),
           [Types::Standard::ScalarRef](https://www.chedong.com/phpMan.php/perldoc/Types%3A%3AStandard%3A%3AScalarRef/markdown), [Types::Standard::StrMatch](https://www.chedong.com/phpMan.php/perldoc/Types%3A%3AStandard%3A%3AStrMatch/markdown),
           [Types::Standard::Tied](https://www.chedong.com/phpMan.php/perldoc/Types%3A%3AStandard%3A%3ATied/markdown), and [Types::Standard::Tuple](https://www.chedong.com/phpMan.php/perldoc/Types%3A%3AStandard%3A%3ATuple/markdown).

       o   [Reply::Plugin::TypeTiny](https://www.chedong.com/phpMan.php/perldoc/Reply%3A%3APlugin%3A%3ATypeTiny/markdown) is not covered by the stability policy.

   [Type::Tiny](https://www.chedong.com/phpMan.php/perldoc/Type%3A%3ATiny/markdown) Versioning Policy
       As of 1.000000, this distribution follows a versioning scheme similar
       to Moo, which is based on a semver <<http://semver.org/>>-like three
       component version number, but with the last two components each
       represented by three decimal digits in the fractional part of the
       version number. That is, version 1.003002 of the software represents
       "1.3.2".

       Additionally, releases where the second component is an odd number will
       be considered unstable/trial releases. (These will also include an
       underscore in the version number as per the usual CPAN convention.)

NEXT STEPS
       Here's your next step:

       o   [Type::Tiny::Manual::Contributing](https://www.chedong.com/phpMan.php/perldoc/Type%3A%3ATiny%3A%3AManual%3A%3AContributing/markdown)

           Contributing to [Type::Tiny](https://www.chedong.com/phpMan.php/perldoc/Type%3A%3ATiny/markdown) development.

AUTHOR
       Toby Inkster <<tobyink@cpan.org>>.

COPYRIGHT AND LICENCE
       This software is copyright (c) 2013-2014, 2017-2021 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.

perl v5.32.1                      2021-08-31 [Type::Tiny::Manual](https://www.chedong.com/phpMan.php/perldoc/Type%3A%3ATiny%3A%3AManual/markdown)::[Policies(3pm)](https://www.chedong.com/phpMan.php/man/Policies/3pm/markdown)