bit-not

(bit-not bit-array &optional result-bit-array)

Element-wise negation of one bit array, answered as a bit vector. The input must be a bit array -- a #* literal or a make-array result with :element-type 'bit, of any rank; anything else signals an error.

When result-bit-array is omitted or nil, a fresh bit array is created. When it is t, bit-array is reused destructively. Otherwise it must be a bit array of the same dimensions; it is written into and answered. See bit-vector-p for what counts as a bit array.