Core concept
// Scala 3
given intOrdering: Ordering[Int] = Ordering.Int
def sort[T](xs: List[T])(using Ordering[T]): List[T] = xs.sortedAdvertisement
How it works
Implicits in Scala 2 had many overloaded meanings — Scala 3 clarifies.
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Trade-offs + gotchas
Type classes, contextual programming, DI.