use warnings;
use Carp 'confess';
-use Scalar::Util 'blessed', 'weaken', 'looks_like_number';
+use Scalar::Util 'blessed', 'weaken';
+use Try::Tiny;
-our $VERSION = '0.01';
+our $VERSION = '1.12';
+$VERSION = eval $VERSION;
our $AUTHORITY = 'cpan:STEVAN';
-use base 'Class::MOP::Method';
+use base 'Class::MOP::Method::Inlined';
sub new {
my $class = shift;
my %options = @_;
-
- (exists $options{options} && ref $options{options} eq 'HASH')
- || confess "You must pass a hash of options";
-
- (blessed $options{meta_instance} && $options{meta_instance}->isa('Class::MOP::Instance'))
- || confess "You must supply a meta-instance";
-
- (exists $options{attributes} && ref $options{attributes} eq 'ARRAY')
- || confess "You must pass an array of options";
-
- (blessed($_) && $_->isa('Class::MOP::Attribute'))
- || confess "You must supply a list of attributes which is a 'Class::MOP::Attribute' instance"
- for @{$options{attributes}};
-
- my $self = bless {
- # from our superclass
- body => undef,
- # specific to this subclass
- options => $options{options},
- meta_instance => $options{meta_instance},
- attributes => $options{attributes},
- } => $class;
-
- # we don't want this creating
- # a cycle in the code, if not
+
+ (blessed $options{metaclass} && $options{metaclass}->isa('Class::MOP::Class'))
+ || confess "You must pass a metaclass instance if you want to inline"
+ if $options{is_inline};
+
+ ($options{package_name} && $options{name})
+ || confess "You must supply the package_name and name parameters $Class::MOP::Method::UPGRADE_ERROR_TEXT";
+
+ my $self = $class->_new(\%options);
+
+ # we don't want this creating
+ # a cycle in the code, if not
# needed
- weaken($self->{meta_instance});
+ weaken($self->{'associated_metaclass'});
+
+ $self->_initialize_body;
+
+ 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 {
+ # inherited from Class::MOP::Method
+ body => $params->{body},
+ # associated_metaclass => $params->{associated_metaclass}, # overriden
+ package_name => $params->{package_name},
+ name => $params->{name},
+ original_method => $params->{original_method},
+
+ # inherited from Class::MOP::Generated
+ is_inline => $params->{is_inline} || 0,
+ definition_context => $params->{definition_context},
- $self->intialize_body;
+ # inherited from Class::MOP::Inlined
+ _expected_method_class => $params->{_expected_method_class},
- return $self;
+ # defined in this subclass
+ options => $params->{options} || {},
+ associated_metaclass => $params->{metaclass},
+ }, $class;
}
-## accessors
+## accessors
-sub options { (shift)->{options} }
-sub meta_instance { (shift)->{meta_instance} }
-sub attributes { (shift)->{attributes} }
+sub options { (shift)->{'options'} }
+sub associated_metaclass { (shift)->{'associated_metaclass'} }
+
+## cached values ...
+
+sub _attributes {
+ my $self = shift;
+ $self->{'attributes'} ||= [
+ sort { $a->name cmp $b->name }
+ $self->associated_metaclass->get_all_attributes
+ ]
+}
## method
-sub intialize_body {
+sub _initialize_body {
+ my $self = shift;
+ my $method_name = '_generate_constructor_method';
+
+ $method_name .= '_inline' if $self->is_inline;
+
+ $self->{'body'} = $self->$method_name;
+}
+
+sub _eval_environment {
my $self = shift;
- # TODO:
- # the %options should also include a both
- # a call 'initializer' and call 'SUPER::'
- # options, which should cover approx 90%
- # of the possible use cases (even if it
- # requires some adaption on the part of
- # the author, after all, nothing is free)
- my $source = 'sub {';
- $source .= "\n" . 'my ($class, %params) = @_;';
- $source .= "\n" . 'my $instance = ' . $self->meta_instance->inline_create_instance('$class');
- $source .= ";\n" . (join ";\n" => map {
- $self->_generate_slot_initializer($_)
- } 0 .. (@{$self->attributes} - 1));
- $source .= ";\n" . 'return $instance';
- $source .= ";\n" . '}';
- warn $source if $self->options->{debug};
-
- my $code;
- {
- # NOTE:
- # create the nessecary lexicals
- # to be picked up in the eval
- my $attrs = $self->attributes;
-
- $code = eval $source;
- confess "Could not eval the constructor :\n\n$source\n\nbecause :\n\n$@" if $@;
- }
- $self->{body} = $code;
+ my $defaults = [map { $_->default } @{ $self->_attributes }];
+ return {
+ '$defaults' => \$defaults,
+ };
}
-sub _generate_slot_initializer {
- my $self = shift;
- my $index = shift;
-
- my $attr = $self->attributes->[$index];
-
- my $default;
- if ($attr->has_default) {
- # NOTE:
- # default values can either be CODE refs
- # in which case we need to call them. Or
- # they can be scalars (strings/numbers)
- # in which case we can just deal with them
- # in the code we eval.
- if ($attr->is_default_a_coderef) {
- $default = '$attrs->[' . $index . ']->default($instance)';
- }
- else {
- $default = $attr->default;
- # make sure to quote strings ...
- unless (looks_like_number($default)) {
- $default = "'$default'";
- }
- }
- }
- $self->meta_instance->inline_set_slot_value(
- '$instance',
- ("'" . $attr->name . "'"),
- ('$params{\'' . $attr->init_arg . '\'}' . (defined $default ? (' || ' . $default) : ''))
- );
+sub _generate_constructor_method {
+ return sub { Class::MOP::Class->initialize(shift)->new_object(@_) }
}
-1;
+sub _generate_constructor_method_inline {
+ my $self = shift;
+
+ my $meta = $self->associated_metaclass;
+
+ my @source = (
+ 'sub {',
+ $meta->_inline_new_object,
+ '}',
+ );
+
+ warn join("\n", @source) if $self->options->{debug};
+
+ my $code = try {
+ $self->_compile_code(\@source);
+ }
+ catch {
+ my $source = join("\n", @source);
+ confess "Could not eval the constructor :\n\n$source\n\nbecause :\n\n$_";
+ };
+
+ return $code;
+}
1;
=pod
-=head1 NAME
+=head1 NAME
Class::MOP::Method::Constructor - Method Meta Object for constructors
=head1 SYNOPSIS
+ use Class::MOP::Method::Constructor;
+
+ my $constructor = Class::MOP::Method::Constructor->new(
+ metaclass => $metaclass,
+ options => {
+ debug => 1, # this is all for now
+ },
+ );
+
+ # calling the constructor ...
+ $constructor->body->execute($metaclass->name, %params);
+
=head1 DESCRIPTION
+This is a subclass of C<Class::MOP::Method> which generates
+constructor methods.
+
=head1 METHODS
=over 4
-=item B<new>
+=item B<< Class::MOP::Method::Constructor->new(%options) >>
+
+This creates a new constructor object. It accepts a hash reference of
+options.
+
+=over 8
+
+=item * metaclass
+
+This should be a L<Class::MOP::Class> object. It is required.
+
+=item * name
+
+The method name (without a package name). This is required.
+
+=item * package_name
+
+The package name for the method. This is required.
+
+=item * is_inline
+
+This indicates whether or not the constructor should be inlined. This
+defaults to false.
+
+=back
-=item B<attributes>
+=item B<< $metamethod->is_inline >>
-=item B<meta_instance>
+Returns a boolean indicating whether or not the constructor is
+inlined.
-=item B<options>
+=item B<< $metamethod->associated_metaclass >>
-=item B<intialize_body>
+This returns the L<Class::MOP::Class> object for the method.
=back
=head1 COPYRIGHT AND LICENSE
-Copyright 2006 by Infinity Interactive, Inc.
+Copyright 2006-2010 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