Re: alignas (C11)

On 12.11.25 15:02, Andres Freund wrote:
> Hi,
> 
> On 2025-11-12 12:39:19 +0100, Peter Eisentraut wrote:
>> - You cannot use alignas on a typedef.  So some uses of the attribute
>> pg_attribute_aligned() like for PgAioUringContext or the whole int128
>> business cannot be converted directly.  The solution for cases like
>> PgAioUringContext could be to move the alignas into the struct, but I
>> haven't studied this code closely enough, so I'm leaving it.  For int128,
>> there is no straightforward solution, so I'm also leaving that as is.
> 
> Maybe I'm confused, but the aligned attribute for PgAioUringContext is on the
> struct, not the typedef, no?

Yes, you're right.  The immediate problem there is that alignas is not 
syntactically valid at all at that position.