[return]
 ^~~~~~ unexpected void value expression
[1, return]
    ^~~~~~ unexpected void value expression
[ return => 1 ]
  ^~~~~~ unexpected void value expression
[ 1 => return ]
       ^~~~~~ unexpected void value expression
[ a: return ]
     ^~~~~~ unexpected void value expression
[ *return ]
   ^~~~~~ unexpected void value expression
[ **return ]
    ^~~~~~ unexpected void value expression

