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close #11330 sets uses optimized countSetBits (#17334)

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* Update lib/pure/bitops.nim
* Update lib/system/sets.nim
* Apply suggestions from code review

Co-authored-by: Andreas Rumpf <rumpf_a@web.de>
This commit is contained in:
flywind
2021-03-22 07:36:48 +08:00
committed by GitHub
parent 23fd098428
commit c8dda867f2
4 changed files with 98 additions and 85 deletions
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17
lib/std/private/vmutils.nim Normal file
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@@ -0,0 +1,17 @@
template forwardImpl*(impl, arg) {.dirty.} =
when sizeof(x) <= 4:
when x is SomeSignedInt:
impl(cast[uint32](x.int32))
else:
impl(x.uint32)
else:
when x is SomeSignedInt:
impl(cast[uint64](x.int64))
else:
impl(x.uint64)
template toUnsigned*(x: int8): uint8 = cast[uint8](x)
template toUnsigned*(x: int16): uint16 = cast[uint16](x)
template toUnsigned*(x: int32): uint32 = cast[uint32](x)
template toUnsigned*(x: int64): uint64 = cast[uint64](x)
template toUnsigned*(x: int): uint = cast[uint](x)