X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=lib%2FClass%2FMOP%2FMethod.pm;h=65fcff182a2d29ff2ef193572ec959a395857c64;hb=53edec17bae8aa34a398b0bd50dcd7e78e03b733;hp=55b22fb236934a7cabaa88dc6a81178c64ec3c74;hpb=81c8a65bf02bb1b0e240d8f5b626b0ceabf9a37c;p=gitmo%2FClass-MOP.git diff --git a/lib/Class/MOP/Method.pm b/lib/Class/MOP/Method.pm index 55b22fb..65fcff1 100644 --- a/lib/Class/MOP/Method.pm +++ b/lib/Class/MOP/Method.pm @@ -5,123 +5,261 @@ use strict; 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 $VERSION = '0.95'; +$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; + $self->body->(@_); } +# NOTE: +# the Class::MOP bootstrap +# will create this for us +# - SL +# sub clone { ... } + 1; __END__ =pod -=head1 NAME +=head1 NAME Class::MOP::Method - Method Meta Object -=head1 SYNOPSIS - - # ... more to come later maybe - =head1 DESCRIPTION -The Method Protocol is very small, since methods in Perl 5 are just -subroutines within the particular package. We provide a very basic +The Method Protocol is very small, since methods in Perl 5 are just +subroutines in a specific package. We provide a very basic introspection interface. =head1 METHODS -=head2 Introspection - =over 4 -=item B +=item B<< Class::MOP::Method->wrap($code, %options) >> -This will return a B 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 instance, followed +by a hash of options. -=back +The options are: -=head2 Construction +=over 8 -=over 4 +=item * name -=item B +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 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 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 object for the method, if one +exists. + +=item B<< $metamethod->original_method >> -=item B +If this method object was created as a clone of some other method +object, this returns the object that was cloned. -=item B +=item B<< $metamethod->original_name >> -=item B +This returns the method's original name, wherever it was first +defined. -=item B +If this method is a clone of a clone (of a clone, etc.), this method +returns the name from the I 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 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 method in the chain +of clones. + +=item B<< $metamethod->attach_to_class($metaclass) >> + +Given a L 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 instance for this class. + +It should also be noted that L will actually bootstrap +this module by installing a number of attribute meta-objects into its +metaclass. =back @@ -129,16 +267,14 @@ to this class. Stevan Little Estevan@iinteractive.comE -Yuval Kogman Enothingmuch@woobling.comE - =head1 COPYRIGHT AND LICENSE -Copyright 2006 by Infinity Interactive, Inc. +Copyright 2006-2009 by Infinity Interactive, Inc. L 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