NAME

MooseX::OneArgNew - teach ->new to accept single, non-hashref arguments

VERSION

version 0.001

WARNING

The interface for this library may change drastically. It is not yet stable.

SYNOPSIS

In our class definition:

  package Delivery;
  use Moose;
  with('MooseX::OneArgNew' => {
    type     => 'Existing::Message::Type',
    init_arg => 'message',
  });

  has message => (isa => 'Existing::Message::Type', required => 1);

  has to => (
    is   => 'ro',
    isa  => 'Str',
    lazy => 1,
    default => sub {
      my ($self) = @_;
      $self->message->get('To');
    },
  );

When making a message:

  # The traditional way:

  my $delivery = Delivery->new({ message => $message });
  # or
  my $delivery = Delivery->new({ message => $message, to => $to });

  # With one-arg new:

  my $delivery = Delivery->new($message);

DESCRIPTION

MooseX::OneArgNew lets your constructor take a single argument, which will be translated into the value for a one-entry hashref. It is a parameterized role with two parameters:

type

The Moose type that the single argument must be for the one-arg form to work. This should be an existing type, and may be either a string type or a MooseX::Type.

init_arg

This is the string that will be used as the key for the hashref constructed from the one-arg call to new.

WARNINGS

You can apply MooseX::OneArgNew more than once, but if more than one application's type matches a single argument to new, the behavior is undefined and likely to cause bugs.

It would be a very bad idea to supply a type that could accept a normal hashref of arguments to new.

AUTHOR

Ricardo Signes <rjbs@cpan.org>

COPYRIGHT AND LICENSE

This software is copyright (c) 2010 by Ricardo Signes.

This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.