Generators

1sequence count_up(start, end):
2    cycle from start to end as i:
3        yield i
4
5# Usage
6cycle through count_up(1, 5) as n:
7    declare("Count:", n)

1sequence subtask():
2    yield "a"
3    yield "b"
4
5sequence maintask():
6    yield "start"
7    delegate subtask()  # Yields "a", "b"
8    yield "end"
9
10# Output: start, a, b, end

1items := [1, 2, 3, 4, 5]
2
3# Lazy squares
4squares := (x * x for x through items)
5
6# Filtered
7evens := (x for x through items where x % 2 == 0)
8
9cycle through evens as e:
10    declare(e)