[libcxx-commits] [libcxx] [lldb] [libcxx] adds size-based `__split_buffer` representation to unstable ABI (PR #139632)

[Louis Dionne via libcxx-commits]

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@@ -78,23 +336,18 @@ public:
                       __split_buffer,
                       void>;
 
-  pointer __first_;
-  pointer __begin_;
-  pointer __end_;
-  _LIBCPP_COMPRESSED_PAIR(pointer, __cap_, allocator_type, __alloc_);
-
   __split_buffer(const __split_buffer&)            = delete;
   __split_buffer& operator=(const __split_buffer&) = delete;
 
-  _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI __split_buffer()
-      _NOEXCEPT_(is_nothrow_default_constructible<allocator_type>::value)
-      : __first_(nullptr), __begin_(nullptr), __end_(nullptr), __cap_(nullptr) {}
+  _LIBCPP_HIDE_FROM_ABI __split_buffer() = default;
 
   _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI explicit __split_buffer(__alloc_rr& __a)
-      : __first_(nullptr), __begin_(nullptr), __end_(nullptr), __cap_(nullptr), __alloc_(__a) {}
+      _NOEXCEPT_(is_nothrow_default_constructible<allocator_type>::value)
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ldionne wrote:

Is there a reason for adding this conditional `noexcept` as part of this patch? Also below.

https://github.com/llvm/llvm-project/pull/139632