gistfile1.pl

sub n (*@flat) {
  say "flattened " ~ @flat.elems;
}

multi sub m (*@flat) {
  say "flattened " ~ @flat.elems;
}

multi sub m ((Range $range)) {
  say "got Range";
}

my $r = 0..10;

# works
n((1,2,3,));

# works
m(($r,));

# Nominal type check failed for parameter '$range' in sub-signature
m((1,2,3,));