This is the mail archive of the
gcc@gcc.gnu.org
mailing list for the GCC project.
Re: Help with bit-field semantics in C and C++
- From: Gabriel Dos Reis <gdr at integrable-solutions dot net>
- To: David Carlton <david dot carlton at sun dot com>
- Cc: Mark Mitchell <mark at codesourcery dot com>, Mike Stump <mrs at apple dot com>, Dave Korn <dk at artimi dot com>, "'Roger Sayle'" <roger at eyesopen dot com>, "'Joe Buck'" <Joe dot Buck at synopsys dot com>, gcc at gcc dot gnu dot org
- Date: 24 Aug 2004 23:42:22 +0200
- Subject: Re: Help with bit-field semantics in C and C++
- Organization: Integrable Solutions
- References: <195B2A50-F60D-11D8-AF5A-003065BDF310@apple.com><412BAEF5.6010302@codesourcery.com><yf21xhwz05t.fsf@kealia.sfbay.sun.com>
David Carlton <david.carlton@sun.com> writes:
| On Tue, 24 Aug 2004 14:11:17 -0700, Mark Mitchell <mark@codesourcery.com> said:
|
| > The standard is just plain not clear here. There's nothing that says
| > definitively what should happen, either with the conversion or with
| > the subsequent use, assuming that conversion to a value outside the
| > enum range is permitted.
|
| But that last assumption isn't correct, is it?
Indeed, you're correct.
| I don't see how that's
| consistent with 7.2p9: it talks about "the resulting enumeration
| value", which should surely mean that a value outside the enum range
| _isn't_ permitted.
Yes. An enumeration value is computed; exactly which is unspecified.
It does not need to be a meaningful one.
-- Gaby