use warnings;
use Carp 'confess';
-use Scalar::Util 'reftype', 'blessed';
-use B 'svref_2object';
+use Scalar::Util 'weaken', 'reftype', 'blessed';
-our $VERSION = '0.05';
+our $VERSION = '0.94';
+$VERSION = eval $VERSION;
our $AUTHORITY = 'cpan:STEVAN';
use base 'Class::MOP::Object';
# NOTE:
-# if poked in the right way,
+# if poked in the right way,
# they should act like CODE refs.
use overload '&{}' => sub { $_[0]->body }, fallback => 1;
-# introspection
+# construction
-sub meta {
- require Class::MOP::Class;
- Class::MOP::Class->initialize(blessed($_[0]) || $_[0]);
-}
+sub wrap {
+ my ( $class, @args ) = @_;
-# construction
+ unshift @args, 'body' if @args % 2 == 1;
+
+ my %params = @args;
+ my $code = $params{body};
+
+ if (blessed($code) && $code->isa(__PACKAGE__)) {
+ my $method = $code->clone;
+ delete $params{body};
+ Class::MOP::class_of($class)->rebless_instance($method, %params);
+ return $method;
+ }
+ elsif (!ref $code || 'CODE' ne reftype($code)) {
+ confess "You must supply a CODE reference to bless, not (" . ($code || 'undef') . ")";
+ }
-sub wrap {
+ ($params{package_name} && $params{name})
+ || confess "You must supply the package_name and name parameters";
+
+ my $self = $class->_new(\%params);
+
+ weaken($self->{associated_metaclass}) if $self->{associated_metaclass};
+
+ return $self;
+}
+
+sub _new {
my $class = shift;
- my $code = shift;
- ('CODE' eq (reftype($code) || ''))
- || confess "You must supply a CODE reference to bless, not (" . ($code || 'undef') . ")";
- bless {
- '&!body' => $code
- } => blessed($class) || $class;
+
+ return Class::MOP::Class->initialize($class)->new_object(@_)
+ if $class ne __PACKAGE__;
+
+ my $params = @_ == 1 ? $_[0] : {@_};
+
+ return bless {
+ 'body' => $params->{body},
+ 'associated_metaclass' => $params->{associated_metaclass},
+ 'package_name' => $params->{package_name},
+ 'name' => $params->{name},
+ 'original_method' => $params->{original_method},
+ } => $class;
}
## accessors
-sub body { (shift)->{'&!body'} }
+sub associated_metaclass { shift->{'associated_metaclass'} }
-# TODO - add associated_class
+sub attach_to_class {
+ my ( $self, $class ) = @_;
+ $self->{associated_metaclass} = $class;
+ weaken($self->{associated_metaclass});
+}
-# informational
+sub detach_from_class {
+ my $self = shift;
+ delete $self->{associated_metaclass};
+}
-# NOTE:
-# this may not be the same name
-# as the class you got it from
-# This gets the package stash name
-# associated with the actual CODE-ref
-sub package_name {
- my $code = (shift)->body;
- svref_2object($code)->GV->STASH->NAME;
+sub fully_qualified_name {
+ my $self = shift;
+ $self->package_name . '::' . $self->name;
}
-# NOTE:
-# this may not be the same name
-# as the method name it is stored
-# with. This gets the name associated
-# with the actual CODE-ref
-sub name {
- my $code = (shift)->body;
- svref_2object($code)->GV->NAME;
+sub original_method { (shift)->{'original_method'} }
+
+sub _set_original_method { $_[0]->{'original_method'} = $_[1] }
+
+# It's possible that this could cause a loop if there is a circular
+# reference in here. That shouldn't ever happen in normal
+# circumstances, since original method only gets set when clone is
+# called. We _could_ check for such a loop, but it'd involve some sort
+# of package-lexical variable, and wouldn't be terribly subclassable.
+sub original_package_name {
+ my $self = shift;
+
+ $self->original_method
+ ? $self->original_method->original_package_name
+ : $self->package_name;
}
-sub fully_qualified_name {
- my $code = shift;
- $code->package_name . '::' . $code->name;
+sub original_name {
+ my $self = shift;
+
+ $self->original_method
+ ? $self->original_method->original_name
+ : $self->name;
+}
+
+sub original_fully_qualified_name {
+ my $self = shift;
+
+ $self->original_method
+ ? $self->original_method->original_fully_qualified_name
+ : $self->fully_qualified_name;
+}
+
+sub execute {
+ my $self = shift;
+ $self->body->(@_);
}
+# NOTE:
+# the Class::MOP bootstrap
+# will create this for us
+# - SL
+# sub clone { ... }
+
1;
__END__
=pod
-=head1 NAME
+=head1 NAME
Class::MOP::Method - Method Meta Object
-=head1 SYNOPSIS
-
- # ... more to come later maybe
-
=head1 DESCRIPTION
-The Method Protocol is very small, since methods in Perl 5 are just
-subroutines within the particular package. We provide a very basic
+The Method Protocol is very small, since methods in Perl 5 are just
+subroutines in a specific package. We provide a very basic
introspection interface.
=head1 METHODS
-=head2 Introspection
-
=over 4
-=item B<meta>
+=item B<< Class::MOP::Method->wrap($code, %options) >>
-This will return a B<Class::MOP::Class> instance which is related
-to this class.
+This is the constructor. It accepts a method body in the form of
+either a code reference or a L<Class::MOP::Method> instance, followed
+by a hash of options.
-=back
+The options are:
-=head2 Construction
+=over 8
-=over 4
+=item * name
-=item B<wrap (&code)>
+The method name (without a package name). This is required if C<$code>
+is a coderef.
+
+=item * package_name
+
+The package name for the method. This is required if C<$code> is a
+coderef.
+
+=item * associated_metaclass
+
+An optional L<Class::MOP::Class> object. This is the metaclass for the
+method's class.
=back
-=head2 Informational
+=item B<< $metamethod->clone(%params) >>
-=over 4
+This makes a shallow clone of the method object. In particular,
+subroutine reference itself is shared between all clones of a given
+method.
+
+When a method is cloned, the original method object will be available
+by calling C<original_method> on the clone.
+
+=item B<< $metamethod->body >>
+
+This returns a reference to the method's subroutine.
+
+=item B<< $metamethod->name >>
+
+This returns the method's name
+
+=item B<< $metamethod->package_name >>
+
+This returns the method's package name.
+
+=item B<< $metamethod->fully_qualified_name >>
+
+This returns the method's fully qualified name (package name and
+method name).
+
+=item B<< $metamethod->associated_metaclass >>
+
+This returns the L<Class::MOP::Class> object for the method, if one
+exists.
+
+=item B<< $metamethod->original_method >>
-=item B<body>
+If this method object was created as a clone of some other method
+object, this returns the object that was cloned.
-=item B<name>
+=item B<< $metamethod->original_name >>
-=item B<package_name>
+This returns the method's original name, wherever it was first
+defined.
-=item B<fully_qualified_name>
+If this method is a clone of a clone (of a clone, etc.), this method
+returns the name from the I<first> method in the chain of clones.
+
+=item B<< $metamethod->original_package_name >>
+
+This returns the method's original package name, wherever it was first
+defined.
+
+If this method is a clone of a clone (of a clone, etc.), this method
+returns the package name from the I<first> method in the chain of
+clones.
+
+=item B<< $metamethod->original_fully_qualified_name >>
+
+This returns the method's original fully qualified name, wherever it
+was first defined.
+
+If this method is a clone of a clone (of a clone, etc.), this method
+returns the fully qualified name from the I<first> method in the chain
+of clones.
+
+=item B<< $metamethod->attach_to_class($metaclass) >>
+
+Given a L<Class::MOP::Class> object, this method sets the associated
+metaclass for the method. This will overwrite any existing associated
+metaclass.
+
+=item B<< $metamethod->detach_from_class >>
+
+Removes any associated metaclass object for the method.
+
+=item B<< $metamethod->execute(...) >>
+
+This executes the method. Any arguments provided will be passed on to
+the method itself.
+
+=item B<< Class::MOP::Method->meta >>
+
+This will return a L<Class::MOP::Class> instance for this class.
+
+It should also be noted that L<Class::MOP> will actually bootstrap
+this module by installing a number of attribute meta-objects into its
+metaclass.
=back
Stevan Little E<lt>stevan@iinteractive.comE<gt>
-Yuval Kogman E<lt>nothingmuch@woobling.comE<gt>
-
=head1 COPYRIGHT AND LICENSE
-Copyright 2006 by Infinity Interactive, Inc.
+Copyright 2006-2009 by Infinity Interactive, Inc.
L<http://www.iinteractive.com>
This library is free software; you can redistribute it and/or modify
-it under the same terms as Perl itself.
+it under the same terms as Perl itself.
=cut
projects / gitmo/Class-MOP.git / blobdiff