#### 12.2.70 ldb-test [Function] ¶

`ldb-test` bytespec integer ⇒ generalized-boolean

#### Arguments and Values:: ¶

bytespec—a byte specifier.

integer—an integer.

generalized-boolean—a generalized boolean.

#### Description:: ¶

Returns true if any of the bits of the byte in integer specified by bytespec is non-zero; otherwise returns false.

#### Examples:: ¶

     (ldb-test (byte 4 1) 16) ⇒  true
     (ldb-test (byte 3 1) 16) ⇒  false
     (ldb-test (byte 3 2) 16) ⇒  true

#### See Also:: ¶

byte, byte-size, byte-position [Function] , ldb [Accessor] , zerop [Function]

#### Notes:: ¶

     (ldb-test bytespec n) ≡
     (not (zerop (ldb bytespec n))) ≡
     (logtest (ldb bytespec -1) n)