Re: Why wasn't I told about logbitp?!

Ken Tilton <kennytilton@[EMAIL PROTECTED]
> writes:

> The real problem, it seems from a few searches of my code, is that I
> do not write a lot of bit manipulating code, that's how I learn
> stuff. Use it or lose it.

Agreed, I prefer reading newspapers or fiction when commuting...

> Now why the hell isn't logbitp an accessor?!!

That would have been nice...

Not sure about the efficiency of that, but (setf (ldb (byte 1 pos) x) 1)
will do the same as your suggested (setf (logbitp pos x) t).

So:

> (let ((x 40))
>   (setf (logbitp 1 x) t)
>   x)
> -> 42

translates into (and this is real cut & paste):

CAPI-E 42 > (let ((x 40))
              (setf (ldb (byte 1 1) x) 1)
              x)
42

-- 
  (espen)