Re: [PATCH 1/9] Define a structure for object IDs.

Am 04.05.2014 08:07, schrieb Michael Haggerty:

On 05/03/2014 10:12 PM, brian m. carlson wrote:

quoted

Introduce a structure for object IDs.  This allows us to obtain the benefits
of compile-time checking for misuse.  The structure is expected to remain
the same size and have the same alignment requirements on all known
platforms, compared to the array of unsigned char.

Please clarify whether you plan to rely on all platforms having "the
same size and alignment constraints" for correctness, or whether that
observation of the status quo is only meant to reassure us that this
change won't cause memory to be wasted on padding.

I think that a compiler that has different size and alignment requirements 
for the proposed struct object_id and an unsigned char[20] would, strictly 
speaking, not be a "C" compiler.

-- Hannes