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11 lines
226 B
Go
11 lines
226 B
Go
// +build go1.9
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// "go1.9", from Go version 1.9 onward
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// See https://golang.org/pkg/go/build/#hdr-Build_Constraints
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package roaring
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import "math/bits"
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func popcount(x uint64) uint64 {
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return uint64(bits.OnesCount64(x))
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}
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