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| ANSI Common Lisp 12 Numbers 12.2 Dictionary of Numbers
12.2.65 logtest | Function
  Syntax: logtest integer-1 integer-2 generalized-boolean Arguments and Values: integer-1 - an integer. integer-2 - an integer. generalized-boolean - a generalized boolean. Description: Returns true if any of the bits designated by the 1's in integer-1 is 1 in integer-2; otherwise it is false. integer-1 and integer-2 are treated as if they were binary. Negative integer-1 and integer-2 are treated as if they were represented in two's-complement binary. Examples:
       (logtest 1 7)  true
       (logtest 1 2)  false
       (logtest -2 -1)  true
       (logtest 0 -1)  false
  Exceptional Situations: Should signal an error of type type-error if integer-1 is not an integer. Should signal an error of type type-error if integer-2 is not an integer. Notes:
       (logtest x y) ==(not (zerop (logand x y)))
Allegro CL Implementation Details: None.

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