[libcxx-commits] [libcxx] [libc++] Replace `__compressed_pair` with `[[no_unique_address]]` (PR #76756)

[Louis Dionne via libcxx-commits]

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@@ -45,6 +45,9 @@ _LIBCPP_GCC_DIAGNOSTIC_IGNORED("-Winvalid-offsetof")
 template <class _Tp>
 inline const size_t __datasizeof_v = __builtin_offsetof(_FirstPaddingByte<_Tp>, __first_padding_byte_);
 _LIBCPP_DIAGNOSTIC_POP
+
+template <class _Tp>
+inline const size_t __datasizeof_v<_Tp&> = __datasizeof_v<_Tp>;
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ldionne wrote:

Is this necessary? If not necessary in this patch, I would remove it from this patch and instead pursue it as a different patch with a tiny test added.

https://github.com/llvm/llvm-project/pull/76756