Category "scala-3"

Scala 3: Define a typeclass instance for an inner class

I am trying to define typeclass instances for an inner class. As a minimal example, I have code that looks like this: trait Typeclass[T] class Outer: class

In multi-stage compilation, should we use a standard serialisation method to ship objects through stages?

This question is formulated in Scala 3/Dotty but should be generalised to any language NOT in MetaML family. The Scala 3 macro tutorial: https://docs.scala-lang

Using K0.ProductInstances in shapeless3

I have a library with typeclasses that I am migrating to Scala 3 using shapeless-3. One of my typeclasses is: trait Parser[T] { def parse(ctx: Context): (Opt

How to implement subtype resolution of typeclass in scala

I want to understand how to go about implementing the following use-case using typeclasses in Scala (or find out if it is even possible). Given a sealed trait a

Scala 3 Explicit Nulls flag makes String operations quite unusable

When using the new Scala 3's flag -Yexplicit-nulls, every Java code which doesn't have explicit non-null annotations is treated as nullable, thus every Java met