https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98978
--- Comment #3 from andysem at mail dot ru --- (In reply to Jonathan Wakely from comment #1) > This would be an ABI break, and so not going to happen. Is there no way to improve standard components implementation? I'd imagine you could provide the new implementation in the new version inline namespace and still support the old ABI for backward compatibility. (In reply to Jonathan Wakely from comment #2) > If we were going to do this, we could also make std::optional<bool> occupy a > single byte, using one bit for the value and one for the engaged flag. This would be more problematic as emplace(), value() and operator*() need to return T&, which would not be possible.
