================
@@ -78,23 +80,232 @@ public:
__split_buffer,
void>;
- pointer __first_;
- pointer __begin_;
- pointer __end_;
- _LIBCPP_COMPRESSED_PAIR(pointer, __cap_, allocator_type, __alloc_);
+ struct __data {
+ pointer __first_ = nullptr;
+ pointer __begin_ = nullptr;
+#ifdef _LIBCPP_ABI_SIZE_BASED_CONTAINERS
+ size_type __size_ = 0;
+ size_type __cap_ = 0;
+ allocator_type __alloc_;
+#else
+ pointer __end_ = nullptr;
+ _LIBCPP_COMPRESSED_PAIR(pointer, __cap_ = nullptr, allocator_type,
__alloc_);
+#endif
+
+ _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI __data() = default;
+
+ _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI explicit __data(const
allocator_type& __alloc)
+ : __alloc_(__alloc)
+ {}
+
+ _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI pointer begin()
_NOEXCEPT {
+ return __begin_;
+ }
+ _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI const_pointer begin()
const _NOEXCEPT {
+ return __begin_;
+ }
+
+ _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI pointer end()
_NOEXCEPT {
+#ifdef _LIBCPP_ABI_SIZE_BASED_CONTAINERS
+ return __begin_ + __size_;
+#else
+ return __end_;
+#endif
+ }
+
+ _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI pointer end() const
_NOEXCEPT {
+#ifdef _LIBCPP_ABI_SIZE_BASED_CONTAINERS
+ return __begin_ + __size_;
+#else
+ return __end_;
+#endif
+ }
----------------
philnik777 wrote:
Could you provide an example where that makes a difference?
https://github.com/llvm/llvm-project/pull/139632
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