On Mon, Oct 26, 2015 at 12:40:18PM +0100, Bernd Schmidt wrote:
> On 10/23/2015 10:40 PM, Martin Sebor wrote:
> >
> >The original code deliberately avoids diagnosing the case of last
> >array members with bounds greater than 1 (see the comment about
> >"a poor man's flexible array member" added with a fix for bug
> >41935) and I didn't want to change that.
>
> Jakub added that, Cc'd. Do you recall why this was done?
Because the amount of code that uses this (including GCC itself) is just too
huge, so everywhere in the middle-end we also special case last array members of
structs. While C99+ has flexible array members, e.g. C++ does not, so users
are left with using struct { ... type fld[1]; };
or similar to stand for the flexible array members, even when they want to
be able to use ->fld[3] etc.
Jakub
