use strict;
use warnings;
-use Carp 'confess';
-
-our $VERSION = '0.06';
+our $VERSION = '0.79';
+$VERSION = eval $VERSION;
our $AUTHORITY = 'cpan:STEVAN';
use base 'Moose::Meta::Method',
'Class::MOP::Method::Accessor';
-## Inline method generators
-
-sub generate_accessor_method_inline {
- my $self = $_[0];
- my $attr = $self->associated_attribute;
- my $attr_name = $attr->name;
- my $inv = '$_[0]';
- my $slot_access = $self->_inline_get($inv, $attr_name);
- my $value_name = $attr->should_coerce ? '$val' : '$_[1]';
+sub _error_thrower {
+ my $self = shift;
+ ( ref $self && $self->associated_attribute ) || $self->SUPER::_error_thrower();
+}
- my $code = 'sub { '
- . $self->_inline_pre_body(@_)
- . 'if (scalar(@_) == 2) {'
- . $self->_inline_check_required
- . $self->_inline_check_coercion
- . $self->_inline_check_constraint($value_name)
- . $self->_inline_store($inv, $value_name)
- . $self->_inline_trigger($inv, $value_name)
- . ' }'
- . $self->_inline_check_lazy
- . $self->_inline_post_body(@_)
- . 'return ' . $self->_inline_auto_deref($self->_inline_get($inv))
- . ' }';
+sub _eval_code {
+ my ( $self, $code ) = @_;
# NOTE:
# set up the environment
- my $type_constraint = $attr->type_constraint
- ? $attr->type_constraint->_compiled_type_constraint
- : undef;
+ my $attr = $self->associated_attribute;
+ my $type_constraint_obj = $attr->type_constraint;
+ my $environment = {
+ '$attr' => \$attr,
+ '$attr_name' => \$attr->name,
+ '$meta' => \$self,
+ '$type_constraint_obj' => \$type_constraint_obj,
+ '$type_constraint_name' => \($type_constraint_obj && $type_constraint_obj->name),
+ '$type_constraint' => \($type_constraint_obj
+ ? $type_constraint_obj->_compiled_type_constraint
+ : undef),
+ };
+
+ #warn "code for $attr_name =>\n" . $code . "\n";
+ $self->_compile_code( environment => $environment, code => $code )
+ or $self->throw_error("Could not create writer for '${\$self->associated_attribute->name}' because $@ \n code: $code", error => $@, data => $code );
+}
- my $sub = eval $code;
- confess "Could not create accessor for '$attr_name' because $@ \n code: $code" if $@;
- return $sub;
+sub _generate_accessor_method_inline {
+ my $self = $_[0];
+ my $attr = $self->associated_attribute;
+ my $attr_name = $attr->name;
+ my $inv = '$_[0]';
+ my $slot_access = $self->_inline_access($inv, $attr_name);
+ my $value_name = $self->_value_needs_copy ? '$val' : '$_[1]';
+
+ $self->_eval_code('sub { ' . "\n"
+ . $self->_inline_pre_body(@_) . "\n"
+ . 'if (scalar(@_) >= 2) {' . "\n"
+ . $self->_inline_copy_value . "\n"
+ . $self->_inline_check_required . "\n"
+ . $self->_inline_check_coercion($value_name) . "\n"
+ . $self->_inline_check_constraint($value_name) . "\n"
+ . $self->_inline_store($inv, $value_name) . "\n"
+ . $self->_inline_trigger($inv, $value_name) . "\n"
+ . ' }' . "\n"
+ . $self->_inline_check_lazy($inv) . "\n"
+ . $self->_inline_post_body(@_) . "\n"
+ . 'return ' . $self->_inline_auto_deref($self->_inline_get($inv)) . "\n"
+ . ' }');
}
-sub generate_writer_method_inline {
+sub _generate_writer_method_inline {
my $self = $_[0];
my $attr = $self->associated_attribute;
my $attr_name = $attr->name;
my $inv = '$_[0]';
my $slot_access = $self->_inline_get($inv, $attr_name);
- my $value_name = $attr->should_coerce ? '$val' : '$_[1]';
+ my $value_name = $self->_value_needs_copy ? '$val' : '$_[1]';
- my $code = 'sub { '
+ $self->_eval_code('sub { '
. $self->_inline_pre_body(@_)
+ . $self->_inline_copy_value
. $self->_inline_check_required
- . $self->_inline_check_coercion
- . $self->_inline_check_constraint($value_name)
- . $self->_inline_store($inv, $value_name)
- . $self->_inline_post_body(@_)
- . $self->_inline_trigger($inv, $value_name)
- . ' }';
-
- # NOTE:
- # set up the environment
- my $type_constraint = $attr->type_constraint
- ? $attr->type_constraint->_compiled_type_constraint
- : undef;
-
- my $sub = eval $code;
- confess "Could not create writer for '$attr_name' because $@ \n code: $code" if $@;
- return $sub;
+ . $self->_inline_check_coercion($value_name)
+ . $self->_inline_check_constraint($value_name)
+ . $self->_inline_store($inv, $value_name)
+ . $self->_inline_post_body(@_)
+ . $self->_inline_trigger($inv, $value_name)
+ . ' }');
}
-sub generate_reader_method_inline {
+sub _generate_reader_method_inline {
my $self = $_[0];
my $attr = $self->associated_attribute;
my $attr_name = $attr->name;
my $inv = '$_[0]';
my $slot_access = $self->_inline_get($inv, $attr_name);
- my $code = 'sub {'
+ $self->_eval_code('sub {'
. $self->_inline_pre_body(@_)
- . 'confess "Cannot assign a value to a read-only accessor" if @_ > 1;'
- . $self->_inline_check_lazy
+ . $self->_inline_throw_error('"Cannot assign a value to a read-only accessor"', 'data => \@_') . ' if @_ > 1;'
+ . $self->_inline_check_lazy($inv)
. $self->_inline_post_body(@_)
. 'return ' . $self->_inline_auto_deref( $slot_access ) . ';'
- . '}';
+ . '}');
+}
- # NOTE:
- # set up the environment
- my $type_constraint = $attr->type_constraint
- ? $attr->type_constraint->_compiled_type_constraint
- : undef;
+sub _inline_copy_value {
+ return '' unless shift->_value_needs_copy;
+ return 'my $val = $_[1];'
+}
- my $sub = eval $code;
- confess "Could not create reader for '$attr_name' because $@ \n code: $code" if $@;
- return $sub;
+sub _value_needs_copy {
+ my $attr = (shift)->associated_attribute;
+ return $attr->should_coerce;
}
-sub generate_reader_method { shift->generate_reader_method_inline(@_) }
-sub generate_writer_method { shift->generate_writer_method_inline(@_) }
-sub generate_accessor_method { shift->generate_accessor_method_inline(@_) }
+sub _generate_reader_method { shift->_generate_reader_method_inline(@_) }
+sub _generate_writer_method { shift->_generate_writer_method_inline(@_) }
+sub _generate_accessor_method { shift->_generate_accessor_method_inline(@_) }
+sub _generate_predicate_method { shift->_generate_predicate_method_inline(@_) }
+sub _generate_clearer_method { shift->_generate_clearer_method_inline(@_) }
sub _inline_pre_body { '' }
sub _inline_post_body { '' }
sub _inline_check_constraint {
- my ($self, $value) = @_;
+ my ($self, $value) = @_;
- my $attr = $self->associated_attribute;
+ my $attr = $self->associated_attribute;
+ my $attr_name = $attr->name;
- return '' unless $attr->has_type_constraint;
-
- # FIXME
- # This sprintf is insanely annoying, we should
- # fix it someday - SL
- return sprintf <<'EOF', $value, $value, $value, $value, $value, $value, $value
-defined($type_constraint->(%s))
- || confess "Attribute (" . $attr->name . ") does not pass the type constraint ("
- . $attr->type_constraint->name . ") with "
- . (defined(%s) ? (Scalar::Util::blessed(%s) && overload::Overloaded(%s) ? overload::StrVal(%s) : %s) : "undef")
- if defined(%s);
-EOF
+ return '' unless $attr->has_type_constraint;
+
+ my $type_constraint_name = $attr->type_constraint->name;
+
+ qq{\$type_constraint->($value) || } . $self->_inline_throw_error(qq{"Attribute ($attr_name) does not pass the type constraint because: " . \$type_constraint_obj->get_message($value)}, "data => $value") . ";";
}
sub _inline_check_coercion {
- my $attr = (shift)->associated_attribute;
+ my ($self, $value) = @_;
- return '' unless $attr->should_coerce;
- return 'my $val = $attr->type_constraint->coerce($_[1]);'
+ my $attr = $self->associated_attribute;
+
+ return '' unless $attr->should_coerce;
+ return "$value = \$attr->type_constraint->coerce($value);";
}
sub _inline_check_required {
- my $attr = (shift)->associated_attribute;
+ my $self = shift;
+ my $attr = $self->associated_attribute;
- return '' unless $attr->is_required;
- return 'defined($_[1]) || confess "Attribute ($attr_name) is required, so cannot be set to undef";'
+ my $attr_name = $attr->name;
+
+ return '' unless $attr->is_required;
+ return qq{(\@_ >= 2) || } . $self->_inline_throw_error(qq{"Attribute ($attr_name) is required, so cannot be set to undef"}) . ';' # defined $_[1] is not good enough
}
sub _inline_check_lazy {
- my $self = $_[0];
- my $attr = $self->associated_attribute;
+ my ($self, $instance) = @_;
- return '' unless $attr->is_lazy;
+ my $attr = $self->associated_attribute;
- my $inv = '$_[0]';
- my $slot_access = $self->_inline_get($inv, $attr->name);
-
- if ($attr->has_type_constraint) {
- # NOTE:
- # this could probably be cleaned
- # up and streamlined a little more
- return 'unless (exists ' . $slot_access . ') {' .
- ' if ($attr->has_default || $attr->has_builder ) {' .
- ' my $default; '.
- ' $default = $attr->default(' . $inv . ') if $attr->has_default;' .
- ' if ( $attr->has_builder ) { '.
- ' my $builder = $self->builder;'.
- ' confess(blessed('.$inv.')." does not support builder method \'$builder\' for attribute \'" . $attr->name . "\'")'.
- ' unless '.$inv.'->can($builder); '.
- ' $default = '.$inv.'->$builder;'.
- ' }'.
- ($attr->should_coerce
- ? '$default = $attr->type_constraint->coerce($default);'
- : '') .
- ' (defined($type_constraint->($default)))' .
- ' || confess "Attribute (" . $attr->name . ") does not pass the type constraint ("' .
- ' . $attr->type_constraint->name . ") with " . (defined($default) ? (Scalar::Util::blessed($default) && overload::Overloaded($default) ? overload::StrVal($default) : $default) : "undef")' .
- ' if defined($default);' .
- ' ' . $slot_access . ' = $default; ' .
- ' }' .
- ' else {' .
- ' ' . $slot_access . ' = undef;' .
- ' }' .
- '}';
+ return '' unless $attr->is_lazy;
+
+ my $slot_access = $self->_inline_access($instance, $attr->name);
+
+ my $slot_exists = $self->_inline_has($instance, $attr->name);
+
+ my $code = 'unless (' . $slot_exists . ') {' . "\n";
+ if ($attr->has_type_constraint) {
+ if ($attr->has_default || $attr->has_builder) {
+ if ($attr->has_default) {
+ $code .= ' my $default = $attr->default(' . $instance . ');'."\n";
+ }
+ elsif ($attr->has_builder) {
+ $code .= ' my $default;'."\n".
+ ' if(my $builder = '.$instance.'->can($attr->builder)){ '."\n".
+ ' $default = '.$instance.'->$builder; '. "\n } else {\n" .
+ ' ' . $self->_inline_throw_error(q{sprintf "%s does not support builder method '%s' for attribute '%s'", ref(} . $instance . ') || '.$instance.', $attr->builder, $attr->name') .
+ ';'. "\n }";
+ }
+ $code .= $self->_inline_check_coercion('$default') . "\n";
+ $code .= $self->_inline_check_constraint('$default') . "\n";
+ $code .= ' ' . $self->_inline_init_slot($attr, $instance, $slot_access, '$default') . "\n";
+ }
+ else {
+ $code .= ' ' . $self->_inline_init_slot($attr, $instance, $slot_access, 'undef') . "\n";
}
- return 'unless (exists ' . $slot_access . ') {' .
- ' if ($attr->has_default) { ' . $slot_access . ' = $attr->default(' . $inv . '); }' .
- ' elsif ($attr->has_builder) { my $builder = $attr->builder; ' . $slot_access . ' = ' . $inv . '->$builder; }' .
- ' else { ' .$slot_access . ' = undef; } '.
- '}';
+ } else {
+ if ($attr->has_default) {
+ $code .= ' ' . $self->_inline_init_slot($attr, $instance, $slot_access, ('$attr->default(' . $instance . ')')) . "\n";
+ }
+ elsif ($attr->has_builder) {
+ $code .= ' if (my $builder = '.$instance.'->can($attr->builder)) { ' . "\n"
+ . ' ' . $self->_inline_init_slot($attr, $instance, $slot_access, ($instance . '->$builder'))
+ . "\n } else {\n"
+ . ' ' . $self->_inline_throw_error(q{sprintf "%s does not support builder method '%s' for attribute '%s'", ref(} . $instance . ') || '.$instance.', $attr->builder, $attr->name')
+ . ';'. "\n }";
+ }
+ else {
+ $code .= ' ' . $self->_inline_init_slot($attr, $instance, $slot_access, 'undef') . "\n";
+ }
+ }
+ $code .= "}\n";
+ return $code;
}
+sub _inline_init_slot {
+ my ($self, $attr, $inv, $slot_access, $value) = @_;
+ if ($attr->has_initializer) {
+ return ('$attr->set_initial_value(' . $inv . ', ' . $value . ');');
+ }
+ else {
+ return ($slot_access . ' = ' . $value . ';');
+ }
+}
sub _inline_store {
- my ($self, $instance, $value) = @_;
- my $attr = $self->associated_attribute;
+ my ($self, $instance, $value) = @_;
+ my $attr = $self->associated_attribute;
- my $mi = $attr->associated_class->get_meta_instance;
- my $slot_name = sprintf "'%s'", $attr->slots;
+ my $mi = $attr->associated_class->get_meta_instance;
- my $code = $mi->inline_set_slot_value($instance, $slot_name, $value) . ";";
- $code .= $mi->inline_weaken_slot_value($instance, $slot_name, $value) . ";"
- if $attr->is_weak_ref;
+ my $code = $mi->inline_set_slot_value($instance, $attr->slots, $value) . ";";
+ $code .= $mi->inline_weaken_slot_value($instance, $attr->slots, $value) . ";"
+ if $attr->is_weak_ref;
return $code;
}
sub _inline_trigger {
- my ($self, $instance, $value) = @_;
- my $attr = $self->associated_attribute;
- return '' unless $attr->has_trigger;
- return sprintf('$attr->trigger->(%s, %s, $attr);', $instance, $value);
+ my ($self, $instance, $value) = @_;
+ my $attr = $self->associated_attribute;
+ return '' unless $attr->has_trigger;
+ return sprintf('$attr->trigger->(%s, %s);', $instance, $value);
}
sub _inline_get {
- my ($self, $instance) = @_;
- my $attr = $self->associated_attribute;
+ my ($self, $instance) = @_;
+ my $attr = $self->associated_attribute;
- my $mi = $attr->associated_class->get_meta_instance;
- my $slot_name = sprintf "'%s'", $attr->slots;
+ my $mi = $attr->associated_class->get_meta_instance;
- return $mi->inline_get_slot_value($instance, $slot_name);
+ return $mi->inline_get_slot_value($instance, $attr->slots);
+}
+
+sub _inline_access {
+ my ($self, $instance) = @_;
+ my $attr = $self->associated_attribute;
+
+ my $mi = $attr->associated_class->get_meta_instance;
+
+ return $mi->inline_slot_access($instance, $attr->slots);
+}
+
+sub _inline_has {
+ my ($self, $instance) = @_;
+ my $attr = $self->associated_attribute;
+
+ my $mi = $attr->associated_class->get_meta_instance;
+
+ return $mi->inline_is_slot_initialized($instance, $attr->slots);
}
sub _inline_auto_deref {
$sigil = '%';
}
else {
- confess "Can not auto de-reference the type constraint '" . $type_constraint->name . "'";
+ $self->throw_error("Can not auto de-reference the type constraint '" . $type_constraint->name . "'", type_constraint => $type_constraint );
}
"(wantarray() ? $sigil\{ ( $ref_value ) || return } : ( $ref_value ) )";
=head1 DESCRIPTION
-This is a subclass of L<Class::MOP::Method::Accessor> and it's primary
-responsibility is to generate the accessor methods for attributes. It
-can handle both closure based accessors, as well as inlined source based
-accessors.
-
-This is a fairly new addition to the MOP, but this will play an important
-role in the optimization strategy we are currently following.
-
-=head1 METHODS
-
-=over 4
-
-=item B<generate_accessor_method>
-
-=item B<generate_reader_method>
-
-=item B<generate_writer_method>
-
-=item B<generate_accessor_method_inline>
-
-=item B<generate_reader_method_inline>
-
-=item B<generate_writer_method_inline>
+This class is a subclass of L<Class::MOP::Class::Accessor> that
+provides additional Moose-specific functionality, all of which is
+private.
-=back
+To understand this class, you should read the the
+L<Class::MOP::Class::Accessor> documentation.
=head1 BUGS
=head1 COPYRIGHT AND LICENSE
-Copyright 2006, 2007 by Infinity Interactive, Inc.
+Copyright 2006-2009 by Infinity Interactive, Inc.
L<http://www.iinteractive.com>
projects / gitmo/Moose.git / blobdiff