Log++

It is Log invented by User:A, but with this extension:

(.)
That is NAND. Change the operation into the answer after the NAND operation.
!
Make a Brainfuck Interpreter.

NOT

(A.A)

AND

((A.B).(A.B))

OR

((A.A).(B.B))

NOR

((A.A ).(B.B))

XOR

((A.(A.B)).(B.(A.B)))

Or:

((A.(A.B)).(B.(A.B)))

XNOR

(((A.A).(B.B)).(A.B))

Or:

(((A.(A.B)).(B.(A.B))).((A.(A.B)).(B.(A.B))))

See also

Log