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Stricter signature for countdown/countup (#8549)

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Oscar Nihlgård 2018-08-07 09:24:54 +02:00 • committed by Andreas Rumpf
commit 9b9cfa7306
1 changed files with 3 additions and 3 deletions
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6
lib/system.nim
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@ -1978,7 +1978,7 @@ when sizeof(int) <= 2:
else:
type IntLikeForCount = int|int8|int16|int32|char|bool|uint8|uint16|enum
iterator countdown*[T](a, b: T, step = 1): T {.inline.} =
iterator countdown*[T](a, b: T, step: Positive = 1): T {.inline.} =
## Counts from ordinal value `a` down to `b` (inclusive) with the given
## step count. `T` may be any ordinal type, `step` may only
## be positive. **Note**: This fails to count to ``low(int)`` if T = int for
@ -2001,7 +2001,7 @@ iterator countdown*[T](a, b: T, step = 1): T {.inline.} =
dec(res, step)
when defined(nimNewRoof):
iterator countup*[T](a, b: T, step = 1): T {.inline.} =
iterator countup*[T](a, b: T, step: Positive = 1): T {.inline.} =
## Counts from ordinal value `a` up to `b` (inclusive) with the given
## step count. `S`, `T` may be any ordinal type, `step` may only
## be positive. **Note**: This fails to count to ``high(int)`` if T = int for
@ -2018,7 +2018,7 @@ when defined(nimNewRoof):
inc(res, step)
iterator `..`*[T](a, b: T): T {.inline.} =
## An alias for `countup`.
## An alias for `countup(a, b, 1)`.
when T is IntLikeForCount:
var res = int(a)
while res <= int(b):