Using Perl6: .WHAT used without explanation

[patspam]

In Section 5 (and 5.2) the following code appears:

multi to-json($d) {
    die "Can't serialize an object of type " ~ $d.WHAT.perl
}

I think it's great to get introduced to .WHAT early on when you're exploring Perl6 for the first time.

The text needs a paragraph / tip mentioning what .WHAT does, and maybe a few others like .perl.

[moritz]

Thanks for the suggestion, I've now added a whole section on introspection, which includes .WHAT and .perl.

[patspam]

Bewdy.