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Re: Should structure with flexible array be allowed to be passed by value?
On Tue, 24 Mar 2009, Gabriel Dos Reis wrote:
> > I see nothing about passing by value different from structure assignment,
> > which ignores the flexible array member (see 6.7.2.1 paragraph 22 (in
> > N1256) for an example stating this). ?Although argument passing and return
> > aren't strictly assignments, they generally act in the same way, so such a
> > structure passed by value or used as a function return value loses the
> > flexible array members in the process.
>
> This strikes me as dangerous and mostly useless. I would have
> expected an error.
I've now raised the question on the WG14 list, but I'd expect consistency
with assignment.
Another case that should be covered in compat testcases is passing such a
structure to a variadic function and retrieving it with va_arg; again,
this would ignore the flexible array member.
--
Joseph S. Myers
joseph@codesourcery.com