MooseX::StrictConstructor (3pm)

version 0.19

    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' );

Simply loading this module makes your constructors \*(L"strict\*(R". If your constructor is called with an attribute init argument that your class does not declare, then it calls \*(C`Moose->throw_error()\*(C'. 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 \*(C`BUILD()\*(C' or \*(C`BUILDARGS()\*(C' method to deal with that parameter. In a \*(C`BUILDARGS()\*(C' method, you can simply make sure that this parameter is not included in the hash reference you return. Otherwise, in a \*(C`BUILD()\*(C' method, you can delete it from the hash reference of parameters.

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

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

Please report any bugs or feature requests to \*(C`[email protected]\*(C', 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.

Dave Rolsky <[email protected]>

This software is Copyright (c) 2012 by Dave Rolsky.

This is free software, licensed under:

The Artistic License 2.0 (GPL Compatible)