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code cleanup (#10874)

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Arne Döring 2019-03-28 12:32:02 +01:00 • committed by Andreas Rumpf
commit e904b3f952
6 changed files with 48 additions and 61 deletions
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10
lib/pure/math.nim
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@ -188,18 +188,16 @@ proc nextPowerOfTwo*(x: int): int {.noSideEffect.} =
result = result or (result shr 1)
result += 1 + ord(x<=0)
proc countBits32*(n: int32): int {.noSideEffect.} =
## Counts the set bits in ``n``.
proc countBits32*(n: int32): int {.noSideEffect, deprecated: "use bitops.countSetBits instead".} =
## **Deprecated since version v0.20.0**: Use ``bitops.countSetBits`` instead.
runnableExamples:
doAssert countBits32(7) == 3
doAssert countBits32(8) == 1
doAssert countBits32(15) == 4
doAssert countBits32(16) == 1
doAssert countBits32(17) == 2
var v = n
v = v -% ((v shr 1'i32) and 0x55555555'i32)
v = (v and 0x33333333'i32) +% ((v shr 2'i32) and 0x33333333'i32)
result = ((v +% (v shr 4'i32) and 0xF0F0F0F'i32) *% 0x1010101'i32) shr 24'i32
bitops.countSetBits(n)
proc sum*[T](x: openArray[T]): T {.noSideEffect.} =
## Computes the sum of the elements in ``x``.