RFC #11: Iterators

[ProCode-Software]

• a. New Iterator<T> type (possibly builtin).
  Downsides
  1. Another (builtin) type with niche applications that beginners still have to learn.
  2. Iterators can yield 1 or 2 items. How will that be implemented in the type signature? Have a separate Iterator2<A, B> type, similar to Go, and be required to duplicate methods from Iterator? Or Iterator<T> and Iterator<(A, B)>
• b. Iterators are just lists, but optimized by the compiler when used in for-loops (preferred, but future work). A function can return a list, and if it is created and iterated over using specific operations, the compiler can optimize it.
• c. Add generator functions that can yield values to the language