Sets or gets the attributes of subroutines. Attributes are set for a subroutine at compile time; therefore, setting an invalid attribute results in a compile-time error. Note that attrs has been deprecated. You should use the attributes form instead. During execution, when you call attrs::get on a subroutine reference or name, it returns the list of attributes that are set. Note that attrs::get is not exported. The old usage of attrs is as follows:

sub test {
    use attrs qw(locked method);
    ...
}
@a = attrs::get(	est);

You should use a form like the following instead:

sub test : locked method { }

You can read more about attributes in the next section.

The valid attributes are: