Do you want all the attributes of the object that are set; or all the attributes of the class that have been declared?

Example:

package Foo {
  use Moo;
  has a => (is => "ro");
  has b => (is => "ro");
}

my $bar = Foo->new(a => 42);

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Do you want just "a", or do you want "a" and "b"?

If you want just "a" - that is, the list of attributes that have been set for a particular object - then unless you've been playing around subclassing Method::Generate::Accessor, you ought to be able to use keys(%$bar).

If you want "a" and "b" - that is, the list of all attributes declared for the class - then you could try:

keys(%{
   'Moo'->_constructor_maker_for('Foo')->all_attribute_specs
})

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... which IIRC respects inheritance and role composition.

package Cow { use Moo; has name => (is => 'lazy', default => sub { 'Mooington' }) } say Cow->new->name

In reply to Re: Enumerating all attributes of a Moo object by tobyink
in thread Enumerating all attributes of a Moo object by McA

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