[cfe-dev] Using a enum type for a bitfield

[mats petersson via cfe-dev]

@Serge:

I think the point of bug 11272 is to actually document [directly or
referring to some other documentation elsewhere] ALL of the clang
implementation defined behaviour, which includes the behaviour with
bitfields from enums (and I expect it is identical to gcc's behaviour, but
I don't KNOW that this is the case).

--
Mats

On 26 August 2015 at 11:27, Serge Pavlov <sepavloff at gmail.com> wrote:

> Hi,
>
> Bug 11272 - document implementation-defined behavior
> <https://llvm.org/bugs/show_bug.cgi?id=11272> says nothing about bit
> fields.
>
> Thanks,
> --Serge
>
> 2015-08-26 15:28 GMT+06:00 mats petersson via cfe-dev <
> cfe-dev at lists.llvm.org>:
>
>> Bug number would be 11272 - the text has been mime-encoded to replace the
>> = with =3D (since mime uses = as a special character, and =3D is the
>> escaped = sign). Obviously, some step on the way didn't understand the
>> encoding and left it as plain text without decoding it.
>>
>> --
>> Mats
>>
>> On 26 August 2015 at 08:29, Csaba Raduly via cfe-dev <
>> cfe-dev at lists.llvm.org> wrote:
>>
>>> Hi.
>>>
>>> On Mon, Aug 24, 2015 at 10:29 PM, Hordijk, Michael via cfe-dev  wrote:
>>> > The short question:
>>> >
>>> > Does clang support using an enum as a type for a bit-field?
>>> >
>>> > C11 (6.7.2.1 P 5):
>>> >
>>> > A bit-field shall have a type that is a qualified or unqualified
>>> version
>>> > of _Bool, signed int, unsigned int, or some other
>>> implementation-defined
>>> > type.
>>> ...
>>> > So I'm curious as to whether clang supports it.  I did find this on
>>> > bugzilla:
>>> >
>>> > https://llvm.org/bugs/show_bug.cgi?id=3D11272
>>>
>>> LLVM Bugzilla says:
>>>
>>> '3D11272' is not a valid bug number.
>>>
>>>
>>> Csaba
>>> --
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>>> The Tao of math: The numbers you can count are not the real numbers.
>>> Life is complex, with real and imaginary parts.
>>> "Ok, it boots. Which means it must be bug-free and perfect. " -- Linus
>>> Torvalds
>>> "People disagree with me. I just ignore them." -- Linus Torvalds
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>>
>>
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