use NativeCall;
sub the-time(Int() $it = time) {                   # coerce to Int, current time default
    sub ctime(int64 is rw --> Str) is native {*};  # the actual interface
    my int $time = $it;                            # the rest is syntactic sugar, really.
    ctime($time) };                                # the actual call into the C-library
}
say the-time;   # Sun Jul 15 17:05:34 2018