http://www.perlmonks.org?node_id=1039918


in reply to Restricting a scalar to certain values

:) some food for thought :) Type::Tiny::Enum,Type::Tiny::Enum,Moose::Meta::TypeConstraint::Enum, http://search.cpan.org/dist/MooX-Types-MooseLike-0.23/lib/MooX/Types/MooseLike/Base.pm#Enum, Object::Enum, Class::Value::Enum