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From: wmm@fastdial.net
Subject: Re: Can you static_cast between enums?
Date: 1999/12/18
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In article <385AA7AA.8D983B3@tribble.com>,
  David R Tribble <david@tribble.com> wrote:
>
> "J.Barfurth" wrote:
> [...]
> > After that paragraph follow the interesting rules, which tell you
what
> > static_cast can do, but can't be done without a cast.
> > The relevant one states that static_cast can convert from any
integral
> > type to an enumeration type. As others have stated that does not
allow
> > the cast from one enumeration type to another.
>
> So what does the following expression do, in terms of the xxx_cast
> operators?
>
>     enum Color { RED, WHITE, BLUE };
>     enum Hue { R, W, B };
>
>     Hue  h = (Hue)RED;   // not static_cast<Hue>(RED)?

None of the casting mechanisms -- "(Hue)RED", "Hue(RED)", and
"static_cast<Hue>(RED)" -- allows this conversion, according to
the current wording of the standard.  As I said earlier in this
thread, this is an oversight and is expected to be corrected in
the first Technical Corrigendum.
--
William M. Miller, wmm@fastdial.net
OnDisplay, Inc. (www.ondisplay.com)


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