[Issue 10239] Efficient bitcount for std.bitmanip.BitArray

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=10239

Nathan S. <n8sh.secondary at hotmail.com> changed:

           What    |Removed                     |Added
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             Status|NEW                         |RESOLVED
                 CC|                            |n8sh.secondary at hotmail.com
         Resolution|---                         |FIXED

--- Comment #1 from Nathan S. <n8sh.secondary at hotmail.com> ---
`countBitsSet` was added in PR #1901: https://github.com/dlang/phobos/pull/1901

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