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Re: Bitwise Not Operator

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Am 26.06.2012 20:40, schrieb aleksa:
> On Tuesday, June 26, 2012 7:06:01 PM UTC+2, Ike Naar wrote:
>> On 2012-06-26, aleksa <aleksazr@gmail.com> wrote:
>>> unsigned char X, Y;
>>> if (X != (unsigned char) ~Y)
>>>
>>> why do I get a warning here?
>>> comparison of promoted ~unsigned with unsigned

> but, aren't both values here unsigned?

no, Y is promoted to int before the ~ is applied, then ~Y is int, too

all types that have an integer rank lower than int are promoted to int
(or on rare architectures to unsigned) before any operator is applied

Jens

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Bitwise Not Operator aleksa <aleksazr@gmail.com> - 2012-06-26 08:35 -0700
  Re: Bitwise Not Operator Ike Naar <ike@iceland.freeshell.org> - 2012-06-26 17:06 +0000
    Re: Bitwise Not Operator aleksa <aleksazr@gmail.com> - 2012-06-26 11:40 -0700
      Re: Bitwise Not Operator Jens Gustedt <jens.gustedt@loria.fr> - 2012-06-26 20:57 +0200
      Re: Bitwise Not Operator James Kuyper <jameskuyper@verizon.net> - 2012-06-26 15:17 -0400
  Re: Bitwise Not Operator Les Cargill <lcargill99@comcast.com> - 2012-06-26 12:31 -0500

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