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List:       cfe-dev
Subject:    Re: [cfe-dev] type attributes
From:       Douglas Gregor <dgregor () apple ! com>
Date:       2009-07-24 22:56:46
Message-ID: 019293CE-B624-4B19-AB29-E5EBA6F9883A () apple ! com
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On Jul 24, 2009, at 3:33 PM, Mike Stump wrote:

> On Jul 24, 2009, at 3:20 PM, Eli Friedman wrote:
>> On Fri, Jul 24, 2009 at 1:56 PM, Mike Stump<mrs@apple.com> wrote:
>>> I'm adding the noreturn type attribute.  We can do this in one of  
>>> two
>>> ways, as a bit, or use the general mechanism used by Decls.  I kinda
>>> like the general method used by decls, but wanted to see what others
>>> thought?
>>
>> Either way sounds okay; I think I prefer the general method as well.
>
> Ah, the type uniquing code isn't going to like the general method, and
> type attributes are fairly rare, so I think I'll skip it.  I think
> I'll defer until a machine port wanted to add type attributes....

*shudder*

>> Have you considered putting the noreturn type attribute on
>> FunctionType?
>
> Hum...  I'll have to see if I can sneak in a bit there without
> modifying the size much.

FunctionType has 28 unused bits; grabbing one won't cost us anything.

	- Doug
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