Initial Commit

database/perl/vendor/lib/Class/MOP/Method.pm

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+package Class::MOP::Method;
+our $VERSION = '2.2014';
+
+use strict;
+use warnings;
+
+use Scalar::Util 'weaken', 'reftype', 'blessed';
+
+use parent 'Class::MOP::Object';
+
+# NOTE:
+# if poked in the right way,
+# they should act like CODE refs.
+use overload
+    '&{}' => sub { $_[0]->body },
+    'bool' => sub { 1 },
+    '""' => sub { overload::StrVal($_[0]) },
+    fallback => 1;
+
+# construction
+
+sub wrap {
+    my ( $class, @args ) = @_;
+
+    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)) {
+        $class->_throw_exception( WrapTakesACodeRefToBless => params => \%params,
+                                                                  class  => $class,
+                                                                  code   => $code
+                                    );
+    }
+
+    ($params{package_name} && $params{name})
+        || $class->_throw_exception( PackageNameAndNameParamsNotGivenToWrap => params => \%params,
+                                                                                   class  => $class,
+                                                                                   code   => $code
+                                       );
+
+    my $self = $class->_new(\%params);
+
+    weaken($self->{associated_metaclass}) if $self->{associated_metaclass};
+
+    return $self;
+}
+
+sub _new {
+    my $class = shift;
+
+    return Class::MOP::Class->initialize($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 associated_metaclass { shift->{'associated_metaclass'} }
+
+sub attach_to_class {
+    my ( $self, $class ) = @_;
+    $self->{associated_metaclass} = $class;
+    weaken($self->{associated_metaclass});
+}
+
+sub detach_from_class {
+    my $self = shift;
+    delete $self->{associated_metaclass};
+}
+
+sub fully_qualified_name {
+    my $self = shift;
+    $self->package_name . '::' . $self->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 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->(@_);
+}
+
+# We used to go through use Class::MOP::Class->clone_instance to do this, but
+# this was awfully slow. This method may be called a number of times when
+# classes are loaded (especially during Moose role application), so it is
+# worth optimizing. - DR
+sub clone {
+    my $self = shift;
+
+    my $clone = bless { %{$self}, @_ }, blessed($self);
+    weaken($clone->{associated_metaclass}) if $clone->{associated_metaclass};
+
+    $clone->_set_original_method($self);
+
+    return $clone;
+}
+
+sub _inline_throw_exception {
+    my ( $self, $exception_type, $throw_args ) = @_;
+    return
+          'die Module::Runtime::use_module("Moose::Exception::'
+        . $exception_type
+        . '")->new('
+        . ( $throw_args || '' ) . ')';
+}
+
+1;
+
+# ABSTRACT: Method Meta Object
+
+__END__
+
+=pod
+
+=encoding UTF-8
+
+=head1 NAME
+
+Class::MOP::Method - Method Meta Object
+
+=head1 VERSION
+
+version 2.2014
+
+=head1 DESCRIPTION
+
+The Method Protocol is very small, since methods in Perl 5 are just
+subroutines in a specific package. We provide a very basic
+introspection interface.
+
+=head1 METHODS
+
+=over 4
+
+=item B<< Class::MOP::Method->wrap($code, %options) >>
+
+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.
+
+The options are:
+
+=over 8
+
+=item * name
+
+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
+
+=item B<< $metamethod->clone(%params) >>
+
+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 >>
+
+If this method object was created as a clone of some other method
+object, this returns the object that was cloned.
+
+=item B<< $metamethod->original_name >>
+
+This returns the method's original name, wherever it was first
+defined.
+
+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->is_stub >>
+
+Returns true if the method is just a stub:
+
+  sub foo;
+
+=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
+
+=head1 AUTHORS
+
+=over 4
+
+=item *
+
+Stevan Little <stevan@cpan.org>
+
+=item *
+
+Dave Rolsky <autarch@urth.org>
+
+=item *
+
+Jesse Luehrs <doy@cpan.org>
+
+=item *
+
+Shawn M Moore <sartak@cpan.org>
+
+=item *
+
+יובל קוג'מן (Yuval Kogman) <nothingmuch@woobling.org>
+
+=item *
+
+Karen Etheridge <ether@cpan.org>
+
+=item *
+
+Florian Ragwitz <rafl@debian.org>
+
+=item *
+
+Hans Dieter Pearcey <hdp@cpan.org>
+
+=item *
+
+Chris Prather <chris@prather.org>
+
+=item *
+
+Matt S Trout <mstrout@cpan.org>
+
+=back
+
+=head1 COPYRIGHT AND LICENSE
+
+This software is copyright (c) 2006 by Infinity Interactive, Inc.
+
+This is free software; you can redistribute it and/or modify it under
+the same terms as the Perl 5 programming language system itself.
+
+=cut