NAME

       Type::Tiny::ConstrainedObject - shared behavour for Type::Tiny::Class, etc

STATUS

       This module is considered experiemental.

DESCRIPTION

   Methods
       The following methods exist for Type::Tiny::Class, Type::Tiny::Role, Type::Tiny::Duck, and
       any type constraints that inherit from "Object" or "Overload" in Types::Standard.

       These methods will also work for Type::Tiny::Intersection if at least one of the types in
       the intersection provides these methods.

       These methods will also work for Type::Tiny::Union if all of the types in the union
       provide these methods.

       "stringifies_to($constraint)"
           Generates a new child type constraint which checks the object's stringification
           against a constraint. For example:

              my $type  = Type::Tiny::Class->new(class => 'URI');
              my $child = $type->stringifies_to( StrMatch[qr/^http:/] );

              $child->assert_valid( URI->new("http://example.com/") );

           In the above example, $child is a type constraint that checks objects are blessed into
           (or inherit from) the URI class, and when stringified (e.g. though overloading) the
           result matches the regular expression "qr/^http:/".

           $constraint may be a type constraint, something that can be coerced to a type
           constraint (such as a coderef returning a boolean), a string of Perl code operating on
           $_, or a reference to a regular expression.

           So the following would work:

              my $child = $type->stringifies_to( sub { qr/^http:/ } );
              my $child = $type->stringifies_to(       qr/^http:/   );
              my $child = $type->stringifies_to(       'm/^http:/'  );

              my $child = $type->where('"$_" =~ /^http:/');

       "numifies_to($constraint)"
           The same as "stringifies_to" but checks numification.

           The following might be useful:

              use Types::Standard qw(Int Overload);
              my $IntLike = Int | Overload->numifies_to(Int)

       "with_attribute_values($attr1 => $constraint1, ...)"
           This is best explained with an example:

              use Types::Common qw( InstanceOf StrMatch IntRange );

              my $person = InstanceOf['Local::Human'];
              my $woman  = $person->with_attribute_values(
                 gender   => StrMatch[ qr/^F/i  ],
                 age      => IntRange[ 18 => () ],
              );

              $woman->assert_valid($alice);

           This assertion will firstly check that $alice is a Local::Human, then check that
           "$alice->gender" starts with an "F", and lastly check that "$alice->age" is an integer
           at least 18.

           Again, constraints can be type constraints, coderefs, strings of Perl code, or regular
           expressions.

           Technically the "attributes" don't need to be Moo/Moose/Mouse attributes, but any
           methods which can be called with no parameters and return a scalar.

BUGS

       Please report any bugs to <https://github.com/tobyink/p5-type-tiny/issues>.

SEE ALSO

       Type::Tiny::Manual.

       Type::Tiny.

AUTHOR

       Toby Inkster <tobyink@cpan.org>.

COPYRIGHT AND LICENCE

       This software is copyright (c) 2019-2023 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.