Documentation for method handled assembled from the following pages:

Class: Failure §

From Failure

(Failure) method handled §

Defined as:

method handled(Failure:D: --> Bool:D) is rw

Returns True for handled failures, False otherwise.

sub f() { fail }; my $v = f; say $v.handled; # OUTPUT: «False␤»

The handled method is an lvalue, see routine trait is rw, which means you can also use it to set the handled state:

sub f() { fail }
my $v = f;
$v.handled = True;
say $v.handled; # OUTPUT: «True␤»