On Fri, Feb 12, 2016 at 6:58 AM, Matthijs van Duin
<matthijsvand...@gmail.com> wrote:
> On 11 February 2016 at 16:31, H.J. Lu <hjl.to...@gmail.com> wrote:
>> struct A {
>> static void foo (void) ();
>> static int xxx;
>> };
>
> What about it? It's an empty struct. (And it declares a function and
> a variable in the namespace of A, which however do not have any
> relevant impact here.)
>
Thanks for all the feedbacks. Here is the new proposal:
1. "empty type". An empty type is a trivially-copyable aggregate
occupying zero bytes (excluding any padding).
2. No memory slot nor register should be used to pass or return an object
of empty type.
Footnote: Array of empty type can only passed by reference in C/C++.
--
H.J.
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