Is it possible to provide named parameters with a hash in Perl 6?

Question

How to do it correctly?

> sub adding(:$first, :$second) { $first + $second }
> adding(second => 2, first => 1)
3
> my %param = second => 2, first => 1
{first => 1, second => 2}
> adding(%param)
Too many positionals passed; expected 0 arguments but got 1
  in sub adding at <unknown file> line 1
  in block <unit> at <unknown file> line 1

Answer 1

Add a prefix | to %param

adding( |%param )

This also works for positional arguments

sub foo ( $bar, $baz ){ "$bar:$baz" }
my @args = 'a', 'b';
foo( @args ) # error
foo( |@args ) # "a:b"