Toby Inkster

NAME

MooseX::DeclareX::Plugin::abstract - shiny syntax for MooseX::ABCD

SYNOPSIS

        class Shape is abstract {
                requires 'draw';
        }
        
        class Circle extends Shape {
                method draw { ... }
        }
        
        class Square extends Shape {
                # does not implement 'draw'
        } # dies
        
        my $shape  = Shape->new;  # dies
        my $circle = Circle->new; # succeeds

DESCRIPTION

This distribution adds two new plugins to MooseX::DeclareX.

is abstract

Declares that a class cannot be instantiated.

Also allows the standard Moose requires function to work within classes (it normally only works within roles).

When a class requires a method, then subclasses are supposed to provide that method. If the subclass itself is also abstract, then it doesn't need to provide the required methods. (There's also a little cheat: classes which are mutable may extend abstract classes without implementing required methods. You should not do this though.)

is concrete

A counterpart to is abstract. Currently, this is a no-op, but in future it might enable some checks related to abstract classes.

BUGS

Please report any bugs to http://rt.cpan.org/Dist/Display.html?Queue=MooseX-DeclareX-Plugin-abstract.

SEE ALSO

MooseX::DeclareX, MooseX::ABCD.

AUTHOR

Toby Inkster <tobyink@cpan.org>.

COPYRIGHT AND LICENCE

This software is copyright (c) 2012 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.




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