On Mon, Apr 10, 2017 at 11:30 AM, Richard Biener <rguent...@suse.de> wrote: > On Mon, 10 Apr 2017, Jason Merrill wrote: >> On Mon, Apr 10, 2017 at 8:50 AM, Richard Biener <rguent...@suse.de> wrote: >> > * tree.c (build_cplus_array_type): Set TYPE_TYPELESS_STORAGE >> > for arrays of unsigned char or std::byte. >> >> I think it would be good to have a flag to select whether these >> semantics apply to any char variant and std::byte, only unsigned char >> and std::byte, or only std::byte. > > Any suggestion? Not sure we really need it (I'm hesitant to write > all the testcases to verify it actually works).
Well, there's existing code that uses plain char (e.g. boost) that I want to support. If there's a significant optimization penalty for allowing that, we probably also want to be able to limit the impact. If there isn't much penalty, let's just support all char variants. Jason
