[llvm-branch-commits] [libcxx] [libc++] Add accessor functions to __tree_node_base (PR #147679)

[Louis Dionne via llvm-branch-commits]

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@@ -289,46 +296,47 @@ template <class _NodePtr>
 _LIBCPP_HIDE_FROM_ABI void __tree_balance_after_insert(_NodePtr __root, _NodePtr __x) _NOEXCEPT {
   _LIBCPP_ASSERT_INTERNAL(__root != nullptr, "Root of the tree shouldn't be null");
   _LIBCPP_ASSERT_INTERNAL(__x != nullptr, "Can't attach null node to a leaf");
-  __x->__is_black_ = __x == __root;
-  while (__x != __root && !__x->__parent_unsafe()->__is_black_) {
-    // __x->__parent_ != __root because __x->__parent_->__is_black == false
+  using enum __tree_color;
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ldionne wrote:

```suggestion

```

https://github.com/llvm/llvm-project/pull/147679