use Try::Tiny;
use overload ();
-our $VERSION = '1.19';
our $AUTHORITY = 'cpan:STEVAN';
use Moose::Deprecated;
goto $handler;
}
+sub _inline_throw_error {
+ my ( $self, $msg, $args ) = @_;
+ "\$meta->throw_error($msg" . ($args ? ", $args" : "") . ")"; # FIXME makes deparsing *REALLY* hard
+}
+
sub new {
my ($class, $name, %options) = @_;
$class->_process_options($name, \%options) unless $options{__hack_no_process_options}; # used from clone()... YECHKKK FIXME ICKY YUCK GROSS
## Slot management
-# FIXME:
-# this duplicates too much code from
-# Class::MOP::Attribute, we need to
-# refactor these bits eventually.
-# - SL
-sub _set_initial_slot_value {
- my ($self, $meta_instance, $instance, $value) = @_;
-
- my $slot_name = $self->name;
-
- return $meta_instance->set_slot_value($instance, $slot_name, $value)
- unless $self->has_initializer;
-
- my $callback = sub {
- my $val = $self->_coerce_and_verify( shift, $instance );;
-
- $meta_instance->set_slot_value($instance, $slot_name, $val);
+sub _make_initializer_writer_callback {
+ my $self = shift;
+ my ($meta_instance, $instance, $slot_name) = @_;
+ my $old_callback = $self->SUPER::_make_initializer_writer_callback(@_);
+ return sub {
+ $old_callback->($self->_coerce_and_verify($_[0], $instance));
};
-
- my $initializer = $self->initializer;
-
- # most things will just want to set a value, so make it first arg
- $instance->$initializer($value, $callback, $self);
}
sub set_value {
}
}
+sub _inline_set_value {
+ my $self = shift;
+ my ($instance, $value, $tc, $tc_obj, $for_constructor) = @_;
+
+ my $old = '@old';
+ my $copy = '$val';
+ $tc ||= '$type_constraint';
+ $tc_obj ||= '$type_constraint_obj';
+
+ my @code;
+ if ($self->_writer_value_needs_copy) {
+ push @code, $self->_inline_copy_value($value, $copy);
+ $value = $copy;
+ }
+
+ # constructors already handle required checks
+ push @code, $self->_inline_check_required
+ unless $for_constructor;
+
+ push @code, $self->_inline_tc_code($value, $tc, $tc_obj);
+
+ # constructors do triggers all at once at the end
+ push @code, $self->_inline_get_old_value_for_trigger($instance, $old)
+ unless $for_constructor;
+
+ push @code, (
+ $self->SUPER::_inline_set_value($instance, $value),
+ $self->_inline_weaken_value($instance, $value),
+ );
+
+ # constructors do triggers all at once at the end
+ push @code, $self->_inline_trigger($instance, $value, $old)
+ unless $for_constructor;
+
+ return @code;
+}
+
+sub _writer_value_needs_copy {
+ my $self = shift;
+ return $self->should_coerce;
+}
+
+sub _inline_copy_value {
+ my $self = shift;
+ my ($value, $copy) = @_;
+
+ return 'my ' . $copy . ' = ' . $value . ';'
+}
+
+sub _inline_check_required {
+ my $self = shift;
+
+ return unless $self->is_required;
+
+ my $attr_name = quotemeta($self->name);
+
+ return (
+ 'if (@_ < 2) {',
+ $self->_inline_throw_error(
+ '"Attribute (' . $attr_name . ') is required, so cannot '
+ . 'be set to undef"' # defined $_[1] is not good enough
+ ) . ';',
+ '}',
+ );
+}
+
+sub _inline_tc_code {
+ my $self = shift;
+ return (
+ $self->_inline_check_coercion(@_),
+ $self->_inline_check_constraint(@_),
+ );
+}
+
+sub _inline_check_coercion {
+ my $self = shift;
+ my ($value, $tc, $tc_obj) = @_;
+
+ return unless $self->should_coerce && $self->type_constraint->has_coercion;
+
+ return $value . ' = ' . $tc_obj . '->coerce(' . $value . ');';
+}
+
+sub _inline_check_constraint {
+ my $self = shift;
+ my ($value, $tc, $tc_obj) = @_;
+
+ return unless $self->has_type_constraint;
+
+ my $attr_name = quotemeta($self->name);
+
+ return (
+ 'if (!' . $tc . '->(' . $value . ')) {',
+ $self->_inline_throw_error(
+ '"Attribute (' . $attr_name . ') does not pass the type '
+ . 'constraint because: " . '
+ . $tc_obj . '->get_message(' . $value . ')',
+ 'data => ' . $value
+ ) . ';',
+ '}',
+ );
+}
+
+sub _inline_get_old_value_for_trigger {
+ my $self = shift;
+ my ($instance, $old) = @_;
+
+ return unless $self->has_trigger;
+
+ return (
+ 'my ' . $old . ' = ' . $self->_inline_instance_has($instance),
+ '? ' . $self->_inline_instance_get($instance),
+ ': ();',
+ );
+}
+
+sub _inline_weaken_value {
+ my $self = shift;
+ my ($instance, $value) = @_;
+
+ return unless $self->is_weak_ref;
+
+ my $mi = $self->associated_class->get_meta_instance;
+ return (
+ $mi->inline_weaken_slot_value($instance, $self->name, $value),
+ 'if ref ' . $value . ';',
+ );
+}
+
+sub _inline_trigger {
+ my $self = shift;
+ my ($instance, $value, $old) = @_;
+
+ return unless $self->has_trigger;
+
+ return '$attr->trigger->(' . $instance . ', ' . $value . ', ' . $old . ');';
+}
+
sub _weaken_value {
my ( $self, $instance ) = @_;
}
}
+sub _inline_get_value {
+ my $self = shift;
+ my ($instance, $tc, $tc_obj) = @_;
+
+ my $slot_access = $self->_inline_instance_get($instance);
+ $tc ||= '$type_constraint';
+ $tc_obj ||= '$type_constraint_obj';
+
+ return (
+ $self->_inline_check_lazy($instance, $tc, $tc_obj),
+ $self->_inline_return_auto_deref($slot_access),
+ );
+}
+
+sub _inline_check_lazy {
+ my $self = shift;
+ my ($instance, $tc, $tc_obj) = @_;
+
+ return unless $self->is_lazy;
+
+ my $slot_exists = $self->_inline_instance_has($instance);
+
+ return (
+ 'if (!' . $slot_exists . ') {',
+ $self->_inline_init_from_default($instance, '$default', $tc, $tc_obj, 'lazy'),
+ '}',
+ );
+}
+
+sub _inline_init_from_default {
+ my $self = shift;
+ my ($instance, $default, $tc, $tc_obj, $for_lazy) = @_;
+
+ if (!($self->has_default || $self->has_builder)) {
+ $self->throw_error(
+ 'You cannot have a lazy attribute '
+ . '(' . $self->name . ') '
+ . 'without specifying a default value for it',
+ attr => $self,
+ );
+ }
+
+ return (
+ $self->_inline_generate_default($instance, $default),
+ # intentionally not using _inline_tc_code, since that can be overridden
+ # to do things like possibly only do member tc checks, which isn't
+ # appropriate for checking the result of a default
+ $self->has_type_constraint
+ ? ($self->_inline_check_coercion($default, $tc, $tc_obj, $for_lazy),
+ $self->_inline_check_constraint($default, $tc, $tc_obj, $for_lazy))
+ : (),
+ $self->_inline_init_slot($instance, $default),
+ );
+}
+
+sub _inline_generate_default {
+ my $self = shift;
+ my ($instance, $default) = @_;
+
+ if ($self->has_default) {
+ return 'my ' . $default . ' = $attr->default(' . $instance . ');';
+ }
+ elsif ($self->has_builder) {
+ return (
+ 'my ' . $default . ';',
+ 'if (my $builder = ' . $instance . '->can($attr->builder)) {',
+ $default . ' = ' . $instance . '->$builder;',
+ '}',
+ 'else {',
+ 'my $class = ref(' . $instance . ') || ' . $instance . ';',
+ 'my $builder_name = $attr->builder;',
+ 'my $attr_name = $attr->name;',
+ $self->_inline_throw_error(
+ '"$class does not support builder method '
+ . '\'$builder_name\' for attribute \'$attr_name\'"'
+ ) . ';',
+ '}',
+ );
+ }
+ else {
+ $self->throw_error(
+ "Can't generate a default for " . $self->name
+ . " since no default or builder was specified"
+ );
+ }
+}
+
+sub _inline_init_slot {
+ my $self = shift;
+ my ($inv, $value) = @_;
+
+ if ($self->has_initializer) {
+ return '$attr->set_initial_value(' . $inv . ', ' . $value . ');';
+ }
+ else {
+ return $self->_inline_instance_set($inv, $value) . ';';
+ }
+}
+
+sub _inline_return_auto_deref {
+ my $self = shift;
+
+ return 'return ' . $self->_auto_deref(@_) . ';';
+}
+
+sub _auto_deref {
+ my $self = shift;
+ my ($ref_value) = @_;
+
+ return $ref_value unless $self->should_auto_deref;
+
+ my $type_constraint = $self->type_constraint;
+
+ my $sigil;
+ if ($type_constraint->is_a_type_of('ArrayRef')) {
+ $sigil = '@';
+ }
+ elsif ($type_constraint->is_a_type_of('HashRef')) {
+ $sigil = '%';
+ }
+ else {
+ $self->throw_error(
+ 'Can not auto de-reference the type constraint \''
+ . $type_constraint->name
+ . '\'',
+ type_constraint => $type_constraint,
+ );
+ }
+
+ return 'wantarray '
+ . '? ' . $sigil . '{ (' . $ref_value . ') || return } '
+ . ': (' . $ref_value . ')';
+}
+
## installing accessors
sub accessor_metaclass { 'Moose::Meta::Method::Accessor' }
return;
}
-sub inline_set {
- my $self = shift;
- my ( $instance, $value ) = @_;
-
- my $mi = $self->associated_class->get_meta_instance;
-
- my $code
- = $mi->inline_set_slot_value( $instance, $self->slots, $value ) . ";";
- $code
- .= $mi->inline_weaken_slot_value( $instance, $self->slots, $value )
- . " if ref $value;"
- if $self->is_weak_ref;
-
- return $code;
-}
-
sub install_delegation {
my $self = shift;
1;
+# ABSTRACT: The Moose attribute metaclass
+
__END__
=pod
-=head1 NAME
-
-Moose::Meta::Attribute - The Moose attribute metaclass
-
=head1 DESCRIPTION
This class is a subclass of L<Class::MOP::Attribute> that provides
See L<Moose/BUGS> for details on reporting bugs.
-=head1 AUTHOR
-
-Stevan Little E<lt>stevan@iinteractive.comE<gt>
-
-Yuval Kogman E<lt>nothingmuch@woobling.comE<gt>
-
-=head1 COPYRIGHT AND LICENSE
-
-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.
-
=cut
projects / gitmo/Moose.git / blobdiff