fetch_attrs#

Return the built-in attributes currently set on a referent.

Synopsis#

my @attrs = attributes::_fetch_attrs(\&foo);

What you get back#

A list of attribute names drawn only from the built-in set. For a CODE referent that list can contain lvalue and method. For any other referent the list is empty. User-defined attributes are not consulted here; use get for that.

Examples#

sub s :lvalue :method { $x }
my @a = attributes::_fetch_attrs(\&s);    # ('lvalue', 'method')

my $h = {};
my @a = attributes::_fetch_attrs($h);     # ()

Edge cases#

  • Called with the wrong number of args or a non-reference: croaks with Usage: attributes::_fetch_attrs($reference).

  • Order is fixed: lvalue before method when both are set.

Differences from upstream#

Fully compatible with upstream.

See also#

  • get — public wrapper that also calls FETCH_${type}_ATTRIBUTES.

  • _modify_attrs — write-side counterpart.