use strict;
use warnings;
-use B;
-use Scalar::Util 'blessed';
+use Scalar::Util 'blessed', 'reftype';
use Carp 'confess';
+use Sub::Name 'subname';
-our $VERSION = '0.82_02';
+our $VERSION = '0.94';
$VERSION = eval $VERSION;
our $AUTHORITY = 'cpan:STEVAN';
'package' => $package_name,
%options,
});
-
Class::MOP::store_metaclass_by_name($package_name, $meta);
return $meta;
my %options = @args;
my $package_name = delete $options{package};
- (defined $package_name && $package_name && !blessed($package_name))
- || confess "You must pass a package name and it cannot be blessed";
+ (defined $package_name && $package_name
+ && (!blessed $package_name || $package_name->isa('Class::MOP::Package')))
+ || confess "You must pass a package name or an existing Class::MOP::Package instance";
+
+ $package_name = $package_name->name
+ if blessed $package_name;
Class::MOP::remove_metaclass_by_name($package_name);
sub _new {
my $class = shift;
- my $options = @_ == 1 ? $_[0] : {@_};
- # NOTE:
- # because of issues with the Perl API
- # to the typeglob in some versions, we
- # need to just always grab a new
- # reference to the hash in the accessor.
- # Ideally we could just store a ref and
- # it would Just Work, but oh well :\
- $options->{namespace} ||= \undef;
+ return Class::MOP::Class->initialize($class)->new_object(@_)
+ if $class ne __PACKAGE__;
+
+ my $params = @_ == 1 ? $_[0] : {@_};
- bless $options, $class;
+ return bless {
+ package => $params->{package},
+
+ # NOTE:
+ # because of issues with the Perl API
+ # to the typeglob in some versions, we
+ # need to just always grab a new
+ # reference to the hash in the accessor.
+ # Ideally we could just store a ref and
+ # it would Just Work, but oh well :\
+
+ namespace => \undef,
+
+ } => $class;
}
# Attributes
\%{$_[0]->{'package'} . '::'}
}
+sub method_metaclass { $_[0]->{'method_metaclass'} }
+sub wrapped_method_metaclass { $_[0]->{'wrapped_method_metaclass'} }
+
+# This doesn't always get initialized in a constructor because there is a
+# weird object construction path for subclasses of Class::MOP::Class. At one
+# point, this always got initialized by calling into the XS code first, but
+# that is no longer guaranteed to happen.
+sub _method_map { $_[0]->{'methods'} ||= {} }
+
# utility methods
{
my ($name, $sigil, $type) = ref $variable eq 'HASH'
? @{$variable}{qw[name sigil type]}
- : $self->_deconstruct_variable_name($variable);
+ : $self->_deconstruct_variable_name($variable);
my $pkg = $self->{'package'};
no strict 'refs';
- no warnings 'redefine', 'misc';
- *{$pkg . '::' . $name} = ref $initial_value ? $initial_value : \$initial_value;
+ no warnings 'redefine', 'misc', 'prototype';
+ *{$pkg . '::' . $name} = ref $initial_value ? $initial_value : \$initial_value;
}
sub remove_package_glob {
# ... these functions deal with stuff on the namespace level
sub has_package_symbol {
- my ($self, $variable) = @_;
+ my ( $self, $variable ) = @_;
- my ($name, $sigil, $type) = ref $variable eq 'HASH'
+ my ( $name, $sigil, $type )
+ = ref $variable eq 'HASH'
? @{$variable}{qw[name sigil type]}
: $self->_deconstruct_variable_name($variable);
-
+
my $namespace = $self->namespace;
-
- return 0 unless exists $namespace->{$name};
-
- # FIXME:
- # For some really stupid reason
- # a typeglob will have a default
- # value of \undef in the SCALAR
- # slot, so we need to work around
- # this. Which of course means that
- # if you put \undef in your scalar
- # then this is broken.
-
- if (ref($namespace->{$name}) eq 'SCALAR') {
- return ($type eq 'CODE');
- }
- elsif ($type eq 'SCALAR') {
- my $val = *{$namespace->{$name}}{$type};
- return defined(${$val});
+
+ return 0 unless exists $namespace->{$name};
+
+ my $entry_ref = \$namespace->{$name};
+ if ( reftype($entry_ref) eq 'GLOB' ) {
+ if ( $type eq 'SCALAR' ) {
+ return defined( ${ *{$entry_ref}{SCALAR} } );
+ }
+ else {
+ return defined( *{$entry_ref}{$type} );
+ }
}
else {
- defined(*{$namespace->{$name}}{$type});
+
+ # a symbol table entry can be -1 (stub), string (stub with prototype),
+ # or reference (constant)
+ return $type eq 'CODE';
}
}
my $namespace = $self->namespace;
+ # FIXME
$self->add_package_symbol($variable)
unless exists $namespace->{$name};
- if (ref($namespace->{$name}) eq 'SCALAR') {
- if ($type eq 'CODE') {
+ my $entry_ref = \$namespace->{$name};
+
+ if ( ref($entry_ref) eq 'GLOB' ) {
+ return *{$entry_ref}{$type};
+ }
+ else {
+ if ( $type eq 'CODE' ) {
no strict 'refs';
- return \&{$self->name.'::'.$name};
+ return \&{ $self->name . '::' . $name };
}
else {
return undef;
}
}
- else {
- return *{$namespace->{$name}}{$type};
- }
}
sub remove_package_symbol {
}
}
+## Methods
+
+sub wrap_method_body {
+ my ( $self, %args ) = @_;
+
+ ('CODE' eq ref $args{body})
+ || confess "Your code block must be a CODE reference";
+
+ $self->method_metaclass->wrap(
+ package_name => $self->name,
+ %args,
+ );
+}
+
+sub add_method {
+ my ($self, $method_name, $method) = @_;
+ (defined $method_name && $method_name)
+ || confess "You must define a method name";
+
+ my $body;
+ if (blessed($method)) {
+ $body = $method->body;
+ if ($method->package_name ne $self->name) {
+ $method = $method->clone(
+ package_name => $self->name,
+ name => $method_name
+ ) if $method->can('clone');
+ }
+
+ $method->attach_to_class($self);
+ }
+ else {
+ # If a raw code reference is supplied, its method object is not created.
+ # The method object won't be created until required.
+ $body = $method;
+ }
+
+ $self->_method_map->{$method_name} = $method;
+
+ my ( $current_package, $current_name ) = Class::MOP::get_code_info($body);
+
+ if ( !defined $current_name || $current_name eq '__ANON__' ) {
+ my $full_method_name = ($self->name . '::' . $method_name);
+ subname($full_method_name => $body);
+ }
+
+ $self->add_package_symbol(
+ { sigil => '&', type => 'CODE', name => $method_name },
+ $body,
+ );
+}
+
+sub _code_is_mine {
+ my ( $self, $code ) = @_;
+
+ my ( $code_package, $code_name ) = Class::MOP::get_code_info($code);
+
+ return $code_package && $code_package eq $self->name
+ || ( $code_package eq 'constant' && $code_name eq '__ANON__' );
+}
+
+sub has_method {
+ my ($self, $method_name) = @_;
+ (defined $method_name && $method_name)
+ || confess "You must define a method name";
+
+ return defined($self->get_method($method_name));
+}
+
+sub get_method {
+ my ( $self, $method_name ) = @_;
+ ( defined $method_name && $method_name )
+ || confess "You must define a method name";
+
+ my $method_map = $self->_method_map;
+ my $map_entry = $method_map->{$method_name};
+ my $code = $self->get_package_symbol(
+ {
+ name => $method_name,
+ sigil => '&',
+ type => 'CODE',
+ }
+ );
+
+ # This seems to happen in some weird cases where methods modifiers are
+ # added via roles or some other such bizareness. Honestly, I don't totally
+ # understand this, but returning the entry works, and keeps various MX
+ # modules from blowing up. - DR
+ return $map_entry if blessed $map_entry && !$code;
+
+ return $map_entry if blessed $map_entry && $map_entry->body == $code;
+
+ unless ($map_entry) {
+ return unless $code && $self->_code_is_mine($code);
+ }
+
+ $code ||= $map_entry;
+
+ return $method_map->{$method_name} = $self->wrap_method_body(
+ body => $code,
+ name => $method_name,
+ associated_metaclass => $self,
+ );
+}
+
+sub remove_method {
+ my ($self, $method_name) = @_;
+ (defined $method_name && $method_name)
+ || confess "You must define a method name";
+
+ my $removed_method = delete $self->_full_method_map->{$method_name};
+
+ $self->remove_package_symbol(
+ { sigil => '&', type => 'CODE', name => $method_name }
+ );
+
+ $removed_method->detach_from_class if $removed_method && blessed $removed_method;
+
+ $self->update_package_cache_flag; # still valid, since we just removed the method from the map
+
+ return $removed_method;
+}
+
+sub get_method_list {
+ my $self = shift;
+ return grep { $self->has_method($_) } keys %{ $self->namespace };
+}
+
1;
__END__
represents specified package. If an existing metaclass object exists
for the package, that will be returned instead.
-=item B<< Class::MOP::Package->reinitialize($package_name) >>
+=item B<< Class::MOP::Package->reinitialize($package) >>
This method forcibly removes any existing metaclass for the package
-before calling C<initialize>
+before calling C<initialize>. In contrast to C<initialize>, you may
+also pass an existing C<Class::MOP::Package> instance instead of just
+a package name as C<$package>.
Do not call this unless you know what you are doing.
hash reference. The keys are glob names and the values are references
to the value for that name.
+=back
+
+=head2 Method introspection and creation
+
+These methods allow you to introspect a class's methods, as well as
+add, remove, or change methods.
+
+Determining what is truly a method in a Perl 5 class requires some
+heuristics (aka guessing).
+
+Methods defined outside the package with a fully qualified name (C<sub
+Package::name { ... }>) will be included. Similarly, methods named
+with a fully qualified name using L<Sub::Name> are also included.
+
+However, we attempt to ignore imported functions.
+
+Ultimately, we are using heuristics to determine what truly is a
+method in a class, and these heuristics may get the wrong answer in
+some edge cases. However, for most "normal" cases the heuristics work
+correctly.
+
+=over 4
+
+=item B<< $metapackage->get_method($method_name) >>
+
+This will return a L<Class::MOP::Method> for the specified
+C<$method_name>. If the class does not have the specified method, it
+returns C<undef>
+
+=item B<< $metapackage->has_method($method_name) >>
+
+Returns a boolean indicating whether or not the class defines the
+named method. It does not include methods inherited from parent
+classes.
+
+=item B<< $metapackage->get_method_list >>
+
+This will return a list of method I<names> for all methods defined in
+this class.
+
+=item B<< $metapackage->add_method($method_name, $method) >>
+
+This method takes a method name and a subroutine reference, and adds
+the method to the class.
+
+The subroutine reference can be a L<Class::MOP::Method>, and you are
+strongly encouraged to pass a meta method object instead of a code
+reference. If you do so, that object gets stored as part of the
+class's method map directly. If not, the meta information will have to
+be recreated later, and may be incorrect.
+
+If you provide a method object, this method will clone that object if
+the object's package name does not match the class name. This lets us
+track the original source of any methods added from other classes
+(notably Moose roles).
+
+=item B<< $metapackage->remove_method($method_name) >>
+
+Remove the named method from the class. This method returns the
+L<Class::MOP::Method> object for the method.
+
+=item B<< $metapackage->method_metaclass >>
+
+Returns the class name of the method metaclass, see
+L<Class::MOP::Method> for more information on the method metaclass.
+
+=item B<< $metapackage->wrapped_method_metaclass >>
+
+Returns the class name of the wrapped method metaclass, see
+L<Class::MOP::Method::Wrapped> for more information on the wrapped
+method metaclass.
+
=item B<< Class::MOP::Package->meta >>
This will return a L<Class::MOP::Class> instance for this class.
projects / gitmo/Class-MOP.git / blobdiff