| MooseX::MultiMethods - Multi Method Dispatch based on Moose type constraints |
MooseX::MultiMethods - Multi Method Dispatch based on Moose type constraints
version 0.10
package Paper; use Moose;
package Scissors; use Moose;
package Rock; use Moose;
package Lizard; use Moose;
package Spock; use Moose;
package Game;
use Moose;
use MooseX::MultiMethods;
multi method play (Paper $x, Rock $y) { 1 }
multi method play (Paper $x, Spock $y) { 1 }
multi method play (Scissors $x, Paper $y) { 1 }
multi method play (Scissors $x, Lizard $y) { 1 }
multi method play (Rock $x, Scissors $y) { 1 }
multi method play (Rock $x, Lizard $y) { 1 }
multi method play (Lizard $x, Paper $y) { 1 }
multi method play (Lizard $x, Spock $y) { 1 }
multi method play (Spock $x, Rock $y) { 1 }
multi method play (Spock $x, Scissors $y) { 1 }
multi method play (Any $x, Any $y) { 0 }
my $game = Game->new;
$game->play(Paper->new, Rock->new); # 1, Paper covers Rock
$game->play(Spock->new, Paper->new); # 0, Paper disproves Spock
$game->play(Spock->new, Scissors->new); # 1, Spock smashes Scissors
This module provides multi method dispatch based on Moose type constraints. It
does so by providing a multi keyword that extends the method keyword
provided by MooseX::Method::Signatures.
When invoking a method declared as multi a matching variant is being
searched in all the declared multi variants based on the passed parameters and
the declared type constraints. If a variant has been found, it will be invoked.
If no variant could be found, an exception will be thrown.
Florian Ragwitz <rafl@debian.org>
This software is copyright (c) 2010 by Florian Ragwitz.
This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.
| MooseX::MultiMethods - Multi Method Dispatch based on Moose type constraints |