NAME

MooseX::StrictConstructor - Make your object constructors blow up on unknown attributes

SYNOPSIS

package My::Class;

use Moose;
use MooseX::StrictConstructor;

has 'size' => ...;

# then later ...

# this blows up because color is not a known attribute
My::Class->new( size => 5, color => 'blue' );

DESCRIPTION

Simply loading this module makes your constructors "strict". If your constructor is called with an attribute init argument that your class does not declare, then it calls "Carp::confess()". This is a great way to catch small typos.

Subverting Strictness

You may find yourself wanting to have your constructor accept a parameter which does not correspond to an attribute.

In that case, you'll probably also be writing a BUILD() or BUILDARGS() method to deal with that parameter. In a BUILDARGS() method, you can simply make sure that this parameter is not included in the hash reference you return. Otherwise, in a BUILD() method, you can delete it from the hash reference of parameters.

sub BUILD {
    my $self   = shift;
    my $params = shift;

    if ( delete $params->{do_something} ) {
        ...
    }
}

AUTHOR

Dave Rolsky, <autarch@urth.org>

BUGS

Please report any bugs or feature requests to bug-moosex-strictconstructor@rt.cpan.org, or through the web interface at http://rt.cpan.org. I will be notified, and then you'll automatically be notified of progress on your bug as I make changes.

COPYRIGHT & LICENSE

Copyright 2007-2008 Dave Rolsky, All Rights Reserved.

This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.