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path: root/tests/iter/titerconcat.nim
blob: 477ac5e2681bc3c36e0663f74fe8de21e9b9529c (plain) (blame)
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pre { line-height: 125%; }
td.linenos .normal { color: inherit; background-color: transparent; padding-left: 5px; padding-right: 5px; }
span.linenos { color: inherit; background-color: transparent; padding-left: 5px; padding-right: 5px; }
td.linenos .special { color: #000000; background-color: #ffffc0; padding-left: 5px; padding-right: 5px; }
span.linenos.special { color: #000000; background-color: #ffffc0; padding-left: 5px; padding-right: 5px; }
.highlight .hll { background-color: #ffffcc }
.highlight .c { color: #888888 } /* Comment */
discard """
  output: '''1
2
3
4
20
21
22
23'''
"""

proc toIter*[T](s: Slice[T]): iterator: T =
  iterator it: T {.closure.} =
    for x in s.a..s.b:
      yield x
  return it

iterator concat*[T](its: varargs[T, toIter]): auto =
  for i in its:
    for x in i():
      yield x

for i in concat(1..4, 20..23):
  echo i