I find in Raku that (as expected) I can use an object as a hash key:
class Rutabaga { method color { say "purple (and white)"; } }
my $obj = Rutabaga.new
my %vegeout;
%vegeout{ $obj } = "this works";
And for something I was doing I wanted to save up
data about matches for various different regexs,
so I thought I could just use a hash for this, like so:
my (%match_locs, $loc);
my $godzilla_rx = rx:i{ << godzilla >> };
if $text ~~ m/$godzilla_rx/ {
$loc = $/.from;
say "Godzilla: Found at $loc!";
%match_locs{ $godzilla_rx } = $loc;
}
But using a regex object as a hash key evidently doesn't work,
it gives you the warning message:
# Regex object coerced to string (please use .gist or .perl to do that)
And what's worse is it coerces to an *empty list* which means *every*
regex is treated as the same key.
If you I follow the advice to use the *.perl, then that works, of course:
%match_locs{ $godzilla_rx.perl } = $loc;
But you wouldn't be able to use the keys of the hash as a regex
object later, which seems sub-optimal, though not a concern for
my present purposes.
