================
@@ -45,11 +47,232 @@ _LIBCPP_PUSH_MACROS
_LIBCPP_BEGIN_NAMESPACE_STD
+template <class _SplitBuffer>
+class __split_buffer_pointer_layout {
+public: // TODO: make private after vector becomes size-based
+ using reference = typename _SplitBuffer::reference;
+ using const_reference = typename _SplitBuffer::const_reference;
+ using pointer = typename _SplitBuffer::pointer;
+ using const_pointer = typename _SplitBuffer::const_pointer;
+ using size_type = typename _SplitBuffer::size_type;
+ using allocator_type = typename _SplitBuffer::allocator_type;
+
+ pointer __first_ = nullptr;
+ pointer __begin_ = nullptr;
+ pointer __end_ = nullptr;
+ _LIBCPP_COMPRESSED_PAIR(pointer, __cap_ = nullptr, allocator_type, __alloc_);
+
+public:
+ static const bool __is_size_based = false;
+
+ _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI
__split_buffer_pointer_layout() = default;
+
+ _LIBCPP_CONSTEXPR_SINCE_CXX20
+ _LIBCPP_HIDE_FROM_ABI explicit __split_buffer_pointer_layout(const
allocator_type& __alloc)
+ : __alloc_(__alloc) {}
+
+ _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI pointer first()
_NOEXCEPT { return __first_; }
+
+ _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI const_pointer first()
const _NOEXCEPT { return __first_; }
+
+ _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
{ return __end_; }
+
+ _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI pointer end() const
_NOEXCEPT { return __end_; }
+
+ _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI size_type size() const
_NOEXCEPT {
+ return static_cast<size_type>(__end_ - __begin_);
+ }
+
+ _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI bool empty() const
_NOEXCEPT { return __begin_ == __end_; }
+
+ _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI size_type capacity()
const _NOEXCEPT {
+ return static_cast<size_type>(__cap_ - __first_);
+ }
+
+ _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI void
__update_first(pointer __new_first) _NOEXCEPT {
----------------
philnik777 wrote:
```suggestion
_LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI void __set_first(pointer
__new_first) _NOEXCEPT {
```
Seems like a more canonical name. Same below.
https://github.com/llvm/llvm-project/pull/139632
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