Scala 3 extension methods autocompletion shortcomings

[mpollmeier]

Autocompletion for Scala 3 extension methods currently has many shortcomings. Here's the status quo of what works and doesn't work with Scala 3.2.0.

Starting with the good: the following works, if you paste it as one block into amm:

class A
extension (a: A)
  def foobarbaz: Int = 42
val a = new A
// paste everything above as one block

a.foo<tab> // completes fine

Issue 1: if you paste the same in two blocks, autocompletion doesn't work any longer:

class A
// submit the above line first!

extension (a: A)
  def foobarbaz: Int = 42
val a = new A
a.foo<tab>  // doesn't autocomplete :(
a.foobarbaz // compiles fine though...

Issue 2: the parser doesn't support curly braces

class A
extension (a: A) {
  def foobarbaz: Int = 42
}
val a = new A
a.foo<tab>  // doesn't autocomplete :(
a.foobarbaz // compiles fine though...

Issue 3: importing them from a different namespace doesn't work either:

class A
object AExt:
  extension (a: A)
    def foobarbaz: Int = 42
import AExt.foobarbaz
val a = new A

a.foo<tab>  // doesn't autocomplete :(
a.foobarbaz // compiles fine though...

All of the above work in the regular scala 3.2.0 repl.