NAME

       MooseX::Types::VariantTable::Declare - Declarative sugar for MooseX::Types::VariantTable based methods.

SYNOPSIS

           package Awesome;
           use Moose;

           variant_method dance => Item => sub {
               # Item is the least derived type in the hierarchy,
               # every other type subtypes it
               # this is in effect a fallback
               return "fallback";
           };

           # a more specific type
           variant_method dance => Ballerina => sub {
               my ( $self, $ballerina, @args ) = @_;

               $ballerina; # a value that passed the TC named "Ballerina"

               return "pretty!";
           };

           # also works with objects
           variant_method dance => $type_object => sub { ... };

DESCRIPTION

       This module provides declarative sugar for defining Moose::Meta::Method::VariantTable methods in your
       Moose classes and roles.

       These methods have some semantics:

   Declaration
       The order of the declarations do not matter in most cases.

       It is the type hierarchy that defines the order in which the constraints are checked and items
       dispatched.

       However, in the case that two constraints without an explicit relationship between them (one is a subtype
       of the other) both accept the same value, the one that was declared earlier will win. There is no way
       around this issue, so be careful what types you use especially when mixing variants form many different
       sources.

       Adding the same type to a variant table twice is an error.

   Inheritence
       When dispatching all of the subclass's variants will be tried before the superclass.

       This allows shadowing of types from the superclass even using broader types.

   Roles
       ... are currently broken.

       Don't use variant table methods in a role, unless that's the only definition, because in the future
       variant table merging will happen at role composition time in a role composition like way, so your code
       will not continue to work the same.