Clojurians Log v2

You could use param-tags on HashSet/new - that makes it explicit

(^[Collection] HashSet/new)

Not sure if that’s the right type but whatever that should be

That will either work without reflection or throw, never reflects

Hmm, you know I did try that, let me try again

(I reviewed the interop page before coming here and tried the Clojure 1.12 new thingie 🙂 )

That seems to make the clojure compiler complain:

(->> results
                 (map build-credential-id)
                 ([^PublicKeyCredentialDescriptor] HashSet/new))

Unmatched delimiter: ]

sorry, my mistake, had the caret in the wrong place 🙂

Ended up with this:

; (err) Syntax error (IllegalArgumentException) compiling HashSet/new at (src/repository.clj:101:18).
; (err) Error - param-tags [com.yubico.webauthn.data.PublicKeyCredentialDescriptor] insufficient to resolve constructor in class java.util.HashSet

From

(->> results
                 (map build-credential-id)
                 (^[PublicKeyCredentialDescriptor] HashSet/new)))

Oooh, I see, if I put it like this ^[Collection] it works

Wunderbar. Thank you! 🙂 I got there in the end, with a bit of hinting, ta 🙂

Working without reflection warning:

(->> results
                 (map build-credential-id)
                 (^[Collection] HashSet/new)))

.