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

[Dana Jansens via libcxx-commits]

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In-Reply-To: <llvm.org/llvm/llvm-project/pull/69673 at github.com>


danakj wrote:

FWIW an anonymous union will not participate in `[[no_unique_address]]`, so the unions wrapping things at each level here need to be named: https://godbolt.org/z/hc788ajao

While clang accepts `[[no_unique_address]]` as a decorator on the anonymous union, it does nothing. GCC warns about it doing nothing.

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