Working with companion type for a resolved TypeRepr or Symbol

[cchantep]

In Scala 2, it was possible to:

• from a t: Type do val companionTpe = t.companion
• from a s: Symbol do val companionTpe = s.companion.typeSignature

And then for example to work with the unapply resolved through the companion.

companionTpe.decl(TermName("unapply"))

There is no such equivalent in Scala 3.

A function a companion could be implemented as below on TypeReprMethods.

def companion: TypeRepr =
  TypeRepr.typeConstructorOf(Class.forName(self.typeSymbol.fullName + '$'))

[LPTK]

Seems like a good addition to me. Why don't you make a PR directly on the Dotty repo?

(I'm not affiliated with the compiler team.)

[cchantep]

I would be able to do so iff how the tests are executed was clear/documented.

[ckipp01]

I know this was long ago, but please do check out the docs here. If you feel like something isn't clear or is missing, report back.

[LPTK]

Running the SBT test command should be enough. This is likely not going to introduce a regression. PRs are automatically tested anyway.

[cchantep]

No it's not, and it lacks a proper documentation.