bitset

type BitSet interface {
	// Has tests whether the bit at pos has been set.
	Has(pos int) bool
	// Set sets the bit at pos to one.
	Set(pos int)
	// Clear sets the bit at pos to zero.
	Clear(pos int)
	// CopyBit copies the bit at index from the source into the bit-string.
	CopyBit(src BitSet, index int)
	// CopyBits copies the bits at indices from the source into the bit-string.
	CopyBits(src BitSet, indices []int)
	// Len returns the length of the bit-string.
	Len() int
}