Annotations are for adding meta-information to your code. What does that mean? Consider the following classes:
class Adder {
fun add(a:Double, b:Double) = a + b
}
class Subtractor {
fun subtract(a:Double, b:Double) = a - b
}
If we have a larger arithmetic calculation project where the various operations get handled by classes like Adder and Subtractor here, we could have something like
val eng = CalculationEngine()
...
eng.registerAdder(Adder::class, "add") eng.registerSubtractor(Subtractor::class, "subtract")
...
for registering the particular low-level operations.
We could, however, ...
