[libcxx-commits] [libcxx] [libc++] Ensure that `std::expected` has no tail padding (PR #69673)

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@@ -88,8 +88,263 @@ _LIBCPP_HIDE_FROM_ABI void __throw_bad_expected_access(_Arg&& __arg) {
 #  endif
 }
 
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huixie90 wrote:

Not attached to this line but I'd like to mention here. We have the exact same problems in `std::ranges::__movable_box`, which affects lots of views. Whatever the fix here is likely needed to fix `std::ranges::__movable_box`. So while you are fixing this, perhaps consider put some reusable logic separate so that we can reuse it later.

https://github.com/llvm/llvm-project/pull/69673