An implicit equality typeclass instance, 2015: implicit val intEqual: Eq[Int] = new Eq[Int] { def equal(x: Int, y: Int): Boolean = x == y } (1/8)
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Around that time
@odersky was considering about five different keywords to replace "implicit". I joked at the time that if we started calling them "witnesses", to work around the other changes to implicit scopes, we'd need a "witness relocation program"...
Anyway, the "forgotten" is more of a reference to my memory—I don't remember the exact syntax! But what we're getting in Scala 3 can also be named, but it's optional... and it gets an ugly generated name if you don't specify one.