Documentation for method curupdir assembled from the following types:

class IO::Spec::Unix

From IO::Spec::Unix

(IO::Spec::Unix) method curupdir

Defined as:

method curupdir()

Returns a none Junction of strings representing the current directory and the "one directory up":

say $*SPEC.curupdir;                  # OUTPUT: «none(., ..)␤» 
my @dirs = <. foo .. bar>;
say @dirs.grep(* eq $*SPEC.curupdir); # OUTPUT: «(foo bar)␤» 

Neither foo nor bar are equal to the representation of the current or parent directory, that is why they are returned by grep.