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discard """
output: '''1
2
3
4
1
2'''
"""
proc factory(a, b: int): iterator (): int =
iterator foo(): int {.closure.} =
var x = a
while x <= b:
yield x
inc x
return foo
proc factory2(a, b: int): iterator (): int =
return iterator (): int =
var x = a
while x <= b:
yield x
inc x
let foo = factory(1, 4)
for f in foo():
echo f
let foo2 = factory2(1,2)
for f in foo2(): echo f
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