Iterator protocol

[KCreate]

• Iterators for data structures are created by calling the iterator(old = null) method declared on every instance

  • When passed null, the initial iterator is created
  • When passed an iterator as an argument, the iterator gets incremented to the next position, the method returns the updated iterator
  • When the iterator method returns null, the iterator has finished
  • The value of the iterator can be accessed via the iterator_value(iterator) method

• Loop structures like the foor loop use the iterator protocol to iterate over all instance objects

[KCreate]

Parsing and validation for this is currently broken, for x in y {} causes a compiler crash