BitArray is a composite type, not a bitstype so reinterpret won’t work directly.
type BitArray{N} <: DenseArray{Bool,N}
Fields:
chunks :: Array{UInt64,1}
len :: Int64
dims :: Tuple{Vararg{Int64,N}}
You could do something like the following (but it does seem a bit hacky, so not really sure if recommended)
a = UInt8[0x66, 0x6f, 0x6f]
b = append!(copy(a), fill(UInt8(0), 5)) # pad to UInt64 size
c = reinterpret(UInt64, b)
B = BitVector(24)
B.chunks = c