在Moose扩展中,我在写我试图从属性内访问属性值,而不通过访问器,但我似乎无法得到正确的结果。从属性中获取属性值
我想能写这样的代码
{
package Test;
use Moose;
use MooseX::RemoteName; #provides magic
has attr0 => (
isa => 'Bool',
is => 'ro',
default => sub { 1 },
serializer => sub {
my $s = shift;
return $s->get_value($s) ? 'Y' : 'N';
},
);
has attr1 => (
isa => 'Str',
is => 'ro',
)
}
,这样我就可以做(从我的测试)
my $t0 = Test->new({ attr1 => 'foo' });
isa_ok my $attr0 = $t0->meta->get_attribute('attr0'), 'Class::MOP::Attribute';
is $attr0->serialized, 'Y', 'remote_name serializes';
isa_ok my $attr1 = $t0->meta->get_attribute('attr1'), 'Class::MOP::Attribute';
is $attr1->serialized, 'foo', 'remote_name serializes'; # undef
这就是我想要的扩展
has serializer => (
isa => 'CodeRef',
is => 'ro',
lazy => 1,
default => sub {
return sub {
my $arg = shift;
return $arg->get_value($arg->associated_class);
}
},
);
sub serialized {
my $self = shift;
my $coderef = $self->serializer;
return &$coderef($self);
}
我认为串行器可以调用访问器。没有访问者调用我可以看到的序列化程序的危险。 – Schwern 2012-04-13 02:50:48
唯一的问题,我与那是在某些情况下,我将取消定义读者... – xenoterracide 2012-04-13 03:22:08