use v6.c;

  my %hash = (
    :a<A>,
    :b<B>,
    'c d' => 'C~D',
    'a b' => 'A~B',
    '$somekey' => '?'
  );

  my $somekey = 'a b';

  say %hash«  $somekey  'c d' ».perl; # ("A", "B", "C~D")
  say %hash« '$somekey'       ».perl; # "?"
  say %hash« "$somekey"       ».perl; # "A~B"

  say %hash<  $somekey        >.perl; # "?"