Moo is a light-weight object oriented programming framework which aims to be compatible with Moose. It
does this by detecting when Moose has been loaded, and automatically "inflating" its classes and roles to
full Moose classes and roles. This way, Moo classes can consume Moose roles, Moose classes can extend Moo
classes, and so forth.
However, the surface syntax of Moo differs somewhat from Moose. For example the "isa" option when
defining attributes in Moose must be either a string or a blessed Moose::Meta::TypeConstraint object; but
in Moo must be a coderef. These differences in surface syntax make porting code from Moose to Moo
potentially tricky. MooX::late provides some assistance by enabling a slightly more Moosey surface
syntax.
MooX::late does the following:
1. Supports "isa => $stringytype".
2. Supports "does => $rolename" .
3. Supports "lazy_build => 1".
4. Exports "blessed" and "confess" functions to your namespace.
5. Handles native attribute traits.
Five features. It is not the aim of "MooX::late" to make every aspect of Moo behave exactly identically
to Moose. It's just going after the low-hanging fruit. So it does five things right now, and I promise
that future versions will never do more than seven.
Previous releases of MooX::late added support for "coerce => 1" and "default => $nonref". These features
have now been added to Moo itself, so MooX::late no longer has to deal with them.
UseinMoo::Roles
MooX::late should work in Moo::Roles, with no particular caveats.
package MyRole;
use Moo::Role;
use MooX::late;
Package::Variant can be used to build the Moo equivalent of parameterized roles. MooX::late should work
in roles built with Package::Variant.
use Package::Variant
importing => [ qw( Moo::Role MooX::late ) ],
subs => [ qw( has with ) ];
Typeconstraints
Type constraint strings are interpreted using Type::Parser, using the type constraints defined in
Types::Standard. This provides a very slight superset of Moose's type constraint syntax and built-in type
constraints.
Any unrecognized string that looks like it might be a class name is interpreted as a class type
constraint.
Subclassing
MooX::late is designed to be reasonably easy to subclass. There are comments in the source code
explaining hooks for extensibility.