use strict;
use warnings;
-use Scalar::Util 'blessed', 'weaken', 'looks_like_number';
-
-our $VERSION = '0.75';
-our $AUTHORITY = 'cpan:STEVAN';
+use Carp ();
+use Scalar::Util 'blessed', 'weaken', 'looks_like_number', 'refaddr';
+use Try::Tiny;
use base 'Moose::Meta::Method',
'Class::MOP::Method::Constructor';
|| $class->throw_error("You must supply the package_name and name parameters $Class::MOP::Method::UPGRADE_ERROR_TEXT");
my $self = bless {
- 'body' => undef,
+ 'body' => undef,
'package_name' => $options{package_name},
'name' => $options{name},
'options' => $options{options},
'associated_metaclass' => $meta,
+ 'definition_context' => $options{definition_context},
+ '_expected_method_class' => $options{_expected_method_class} || 'Moose::Object',
} => $class;
# we don't want this creating
return $self;
}
-sub can_be_inlined {
- my $self = shift;
- my $metaclass = $self->associated_metaclass;
-
- my $expected_class = $self->_expected_constructor_class;
-
- # If any of our parents have been made immutable, we are okay to
- # inline our own new method. The assumption is that an inlined new
- # method provided by a parent does not actually get used by
- # children anyway.
- for my $meta (
- grep { $_->is_immutable }
- map { ( ref $metaclass )->initialize($_) }
- grep { $_ ne $expected_class }
- $metaclass->linearized_isa
- ) {
- my $transformer = $meta->immutable_transformer;
-
- # This is actually a false positive if we're in a subclass of
- # this class, _and_ the expected class is not overridden (but
- # should be), and the real expected class is actually
- # immutable itself (see Fey::Object::Table for an example of
- # how this can happen). I'm not sure how to actually handle
- # that case, since it's effectively a bug in the subclass (for
- # not overriding _expected_constructor_class).
- return 1 if $transformer->inlined_constructor;
- }
-
- if ( my $constructor = $metaclass->find_method_by_name( $self->name ) ) {
- my $class = $self->associated_metaclass->name;
-
- if ( $constructor->body != $expected_class->can('new') ) {
- my $warning
- = "Not inlining a constructor for $class since it is not"
- . " inheriting the default $expected_class constructor\n"
- . "If you are certain you don't need to inline your"
- . " constructor, specify inline_constructor => 0 in your"
- . " call to $class->meta->make_immutable\n";
-
- $warning .= " (constructor has method modifiers which would be lost if it were inlined)\n"
- if $constructor->isa('Class::MOP::Method::Wrapped');
-
- warn $warning;
-
- return 0;
- }
- else {
- return 1;
- }
- }
-
- # This would be a rather weird case where we have no constructor
- # in the inheritance chain.
- return 1;
-}
-
-# This is here so can_be_inlined can be inherited by MooseX modules.
-sub _expected_constructor_class {
- return 'Moose::Object';
-}
-
## method
sub _initialize_body {
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 = shift;';
-
- $source .= "\n" . 'return $class->Moose::Object::new(@_)';
- $source .= "\n if \$class ne '" . $self->associated_metaclass->name
- . "';\n";
-
- $source .= $self->_generate_params('$params', '$class');
- $source .= $self->_generate_instance('$instance', '$class');
- $source .= $self->_generate_slot_initializers;
-
- $source .= $self->_generate_triggers();
- $source .= ";\n" . $self->_generate_BUILDALL();
-
- $source .= ";\nreturn \$instance";
- $source .= ";\n" . '}';
- warn $source if $self->options->{debug};
+ $self->{'body'} = $self->_generate_constructor_method_inline;
+}
+
+sub _eval_environment {
+ my $self = shift;
+
+ my $attrs = $self->_attributes;
+
+ my $defaults = [map { $_->default } @$attrs];
# We need to check if the attribute ->can('type_constraint')
# since we may be trying to immutabilize a Moose meta class,
# because the inlined code is using the index of the attributes
# to determine where to find the type constraint
- my $attrs = $self->_attributes;
-
my @type_constraints = map {
$_->can('type_constraint') ? $_->type_constraint : undef
} @$attrs;
defined $_ ? $_->_compiled_type_constraint : undef;
} @type_constraints;
- my $code = $self->_compile_code(
- code => $source,
- environment => {
- '$meta' => \$self,
- '$attrs' => \$attrs,
- '@type_constraints' => \@type_constraints,
- '@type_constraint_bodies' => \@type_constraint_bodies,
- },
- ) or $self->throw_error("Could not eval the constructor :\n\n$source\n\nbecause :\n\n$@", error => $@, data => $source );
-
- $self->{'body'} = $code;
-}
-
-sub _generate_params {
- my ( $self, $var, $class_var ) = @_;
- "my $var = " . $self->_generate_BUILDARGS( $class_var, '@_' ) . ";\n";
-}
-
-sub _generate_instance {
- my ( $self, $var, $class_var ) = @_;
- "my $var = "
- . $self->_meta_instance->inline_create_instance($class_var) . ";\n";
-}
-
-sub _generate_slot_initializers {
- my ($self) = @_;
- return (join ";\n" => map {
- $self->_generate_slot_initializer($_)
- } 0 .. (@{$self->_attributes} - 1)) . ";\n";
-}
-
-sub _generate_BUILDARGS {
- my ( $self, $class, $args ) = @_;
-
- my $buildargs = $self->associated_metaclass->find_method_by_name("BUILDARGS");
-
- if ( $args eq '@_' and ( !$buildargs or $buildargs->body == \&Moose::Object::BUILDARGS ) ) {
- return join("\n",
- 'do {',
- $self->_inline_throw_error('"Single parameters to new() must be a HASH ref"', 'data => $_[0]'),
- ' if scalar @_ == 1 && !( defined $_[0] && ref $_[0] eq q{HASH} );',
- '(scalar @_ == 1) ? {%{$_[0]}} : {@_};',
- '}',
- );
- } else {
- return $class . "->BUILDARGS($args)";
- }
-}
-
-sub _generate_BUILDALL {
- my $self = shift;
- my @BUILD_calls;
- foreach my $method (reverse $self->associated_metaclass->find_all_methods_by_name('BUILD')) {
- push @BUILD_calls => '$instance->' . $method->{class} . '::BUILD($params)';
- }
- return join ";\n" => @BUILD_calls;
-}
-
-sub _generate_triggers {
- my $self = shift;
- my @trigger_calls;
- foreach my $i ( 0 .. $#{ $self->_attributes } ) {
- my $attr = $self->_attributes->[$i];
-
- next unless $attr->can('has_trigger') && $attr->has_trigger;
-
- my $init_arg = $attr->init_arg;
-
- next unless defined $init_arg;
-
- push @trigger_calls => '(exists $params->{\''
- . $init_arg
- . '\'}) && do {'
- . "\n "
- . '$attrs->['
- . $i
- . ']->trigger->('
- . '$instance, '
- . $self->_meta_instance->inline_get_slot_value(
- '$instance',
- $attr->name,
- )
- . ', '
- . ');' . "\n}";
- }
-
- return join ";\n" => @trigger_calls;
-}
-
-sub _generate_slot_initializer {
- my $self = shift;
- my $index = shift;
-
- my $attr = $self->_attributes->[$index];
-
- my @source = ('## ' . $attr->name);
-
- my $is_moose = $attr->isa('Moose::Meta::Attribute'); # XXX FIXME
-
- if ($is_moose && defined($attr->init_arg) && $attr->is_required && !$attr->has_default && !$attr->has_builder) {
- push @source => ('(exists $params->{\'' . $attr->init_arg . '\'}) ' .
- '|| ' . $self->_inline_throw_error('"Attribute (' . $attr->name . ') is required"') .';');
- }
-
- if (($attr->has_default || $attr->has_builder) && !($is_moose && $attr->is_lazy)) {
-
- if ( defined( my $init_arg = $attr->init_arg ) ) {
- push @source => 'if (exists $params->{\'' . $init_arg . '\'}) {';
- push @source => ('my $val = $params->{\'' . $init_arg . '\'};');
- push @source => $self->_generate_type_constraint_and_coercion($attr, $index)
- if $is_moose;
- push @source => $self->_generate_slot_assignment($attr, '$val', $index);
- push @source => "} else {";
- }
- my $default;
- if ( $attr->has_default ) {
- $default = $self->_generate_default_value($attr, $index);
- }
- else {
- my $builder = $attr->builder;
- $default = '$instance->' . $builder;
- }
-
- push @source => '{'; # wrap this to avoid my $val overwrite warnings
- push @source => ('my $val = ' . $default . ';');
- push @source => $self->_generate_type_constraint_and_coercion($attr, $index)
- if $is_moose;
- push @source => $self->_generate_slot_assignment($attr, '$val', $index);
- push @source => '}'; # close - wrap this to avoid my $val overrite warnings
-
- push @source => "}" if defined $attr->init_arg;
- }
- elsif ( defined( my $init_arg = $attr->init_arg ) ) {
- push @source => '(exists $params->{\'' . $init_arg . '\'}) && do {';
-
- push @source => ('my $val = $params->{\'' . $init_arg . '\'};');
- if ($is_moose && $attr->has_type_constraint) {
- if ($attr->should_coerce && $attr->type_constraint->has_coercion) {
- push @source => $self->_generate_type_coercion(
- $attr,
- '$type_constraints[' . $index . ']',
- '$val',
- '$val'
- );
- }
- push @source => $self->_generate_type_constraint_check(
- $attr,
- '$type_constraint_bodies[' . $index . ']',
- '$type_constraints[' . $index . ']',
- '$val'
- );
- }
- push @source => $self->_generate_slot_assignment($attr, '$val', $index);
-
- push @source => "}";
- }
-
- return join "\n" => @source;
-}
-
-sub _generate_slot_assignment {
- my ($self, $attr, $value, $index) = @_;
-
- my $source;
-
- if ($attr->has_initializer) {
- $source = (
- '$attrs->[' . $index . ']->set_initial_value($instance, ' . $value . ');'
- );
- }
- else {
- $source = (
- $self->_meta_instance->inline_set_slot_value(
- '$instance',
- $attr->name,
- $value
- ) . ';'
- );
- }
-
- my $is_moose = $attr->isa('Moose::Meta::Attribute'); # XXX FIXME
-
- if ($is_moose && $attr->is_weak_ref) {
- $source .= (
- "\n" .
- $self->_meta_instance->inline_weaken_slot_value(
- '$instance',
- $attr->name
- ) .
- ' if ref ' . $value . ';'
- );
- }
-
- return $source;
-}
-
-sub _generate_type_constraint_and_coercion {
- my ($self, $attr, $index) = @_;
-
- return unless $attr->has_type_constraint;
-
- my @source;
- if ($attr->should_coerce && $attr->type_constraint->has_coercion) {
- push @source => $self->_generate_type_coercion(
- $attr,
- '$type_constraints[' . $index . ']',
- '$val',
- '$val'
- );
- }
- push @source => $self->_generate_type_constraint_check(
- $attr,
- ('$type_constraint_bodies[' . $index . ']'),
- ('$type_constraints[' . $index . ']'),
- '$val'
- );
- return @source;
-}
-
-sub _generate_type_coercion {
- my ($self, $attr, $type_constraint_name, $value_name, $return_value_name) = @_;
- return ($return_value_name . ' = ' . $type_constraint_name . '->coerce(' . $value_name . ');');
-}
-
-sub _generate_type_constraint_check {
- my ($self, $attr, $type_constraint_cv, $type_constraint_obj, $value_name) = @_;
- return (
- $self->_inline_throw_error('"Attribute (' # FIXME add 'dad'
- . $attr->name
- . ') does not pass the type constraint because: " . '
- . $type_constraint_obj . '->get_message(' . $value_name . ')')
- . "\n\t unless " . $type_constraint_cv . '->(' . $value_name . ');'
- );
-}
-
-sub _generate_default_value {
- my ($self, $attr, $index) = @_;
- # NOTE:
- # default values can either be CODE refs
- # in which case we need to call them. Or
- # they can be scalars (strings/numbers)
- # in which case we can just deal with them
- # in the code we eval.
- if ($attr->is_default_a_coderef) {
- return '$attrs->[' . $index . ']->default($instance)';
- }
- else {
- return q{"} . quotemeta( $attr->default ) . q{"};
- }
+ return {
+ '$meta' => \$self,
+ '$attrs' => \$attrs,
+ '$defaults' => \$defaults,
+ '@type_constraints' => \@type_constraints,
+ '@type_constraint_bodies' => \@type_constraint_bodies,
+ };
}
1;
+# ABSTRACT: Method Meta Object for constructors
+
__END__
=pod
-=head1 NAME
-
-Moose::Meta::Method::Constructor - Method Meta Object for constructors
-
=head1 DESCRIPTION
-This class is a subclass of L<Class::MOP::Class::Constructor> that
+This class is a subclass of L<Class::MOP::Method::Constructor> that
provides additional Moose-specific functionality
To understand this class, you should read the the
-L<Class::MOP::Class::Constructor> documentation as well.
+L<Class::MOP::Method::Constructor> documentation as well.
=head1 INHERITANCE
C<Moose::Meta::Method::Constructor> is a subclass of
L<Moose::Meta::Method> I<and> L<Class::MOP::Method::Constructor>.
-=head1 METHODS
-
-=over 4
-
-=item B<< $metamethod->can_be_inlined >>
-
-This returns true if the method can inlined.
-
-First, it looks at all of the parents of the associated class. If any
-of them have an inlined constructor, then the constructor can be
-inlined.
-
-If none of them have been inlined, it checks to make sure that the
-pre-inlining constructor for the class matches the constructor from
-the expected class.
-
-By default, it expects this constructor come from L<Moose::Object>,
-but subclasses can change this expectation.
-
-If the constructor cannot be inlined it warns that this is the case.
-
-=back
-
-=head1 AUTHORS
-
-Stevan Little E<lt>stevan@iinteractive.comE<gt>
-
-=head1 COPYRIGHT AND LICENSE
-
-Copyright 2006-2009 by Infinity Interactive, Inc.
-
-L<http://www.iinteractive.com>
+=head1 BUGS
-This library is free software; you can redistribute it and/or modify
-it under the same terms as Perl itself.
+See L<Moose/BUGS> for details on reporting bugs.
=cut
projects / gitmo/Moose.git / blobdiff