resumable_iterator.nim

proc split_string(str): auto =
  result = iterator: string =
    var start = 0
    for i in 0..str.high:
      if str[i] == ' ':
        yield str[start..i]
        start = i+1
    yield str[start..str.high]

var c = split_string("Hello World")

for i in c():
  echo i