bit-vector-p

(bit-vector-p object)

Returns true when object is a bit vector: a rank-1 array stamped with the remembered element type bit -- a #* literal or a make-array result with :element-type 'bit. It answers exactly what (typep object 'bit-vector) does. A bit vector prints as the general vector holding 0/1 (there is no packed bit storage on any backend).