[libc++] Set the child pointer outside __insert_node_at in __tree

[philnik777]

This avoids an out parameter in __insert_node_at and makes it more obivious what is actually going on.

[github-actions]

⚠️ C/C++ code formatter, clang-format found issues in your code. ⚠️

You can test this locally with the following command:

git-clang-format --diff HEAD~1 HEAD --extensions  -- libcxx/include/__tree libcxx/include/map

View the diff from clang-format here.

diff --git a/libcxx/include/__tree b/libcxx/include/__tree
index d526ecc8e..bdad62483 100644
--- a/libcxx/include/__tree
+++ b/libcxx/include/__tree
@@ -1781,7 +1781,7 @@ __tree<_Tp, _Compare, _Allocator>::__emplace_hint_unique_key_args(
   bool __inserted              = false;
   if (__child == nullptr) {
     __node_holder __h = __construct_node(std::forward<_Args>(__args)...);
-    __child = static_cast<__node_base_pointer>(__h.get());
+    __child           = static_cast<__node_base_pointer>(__h.get());
     __insert_node_at(__parent, __child);
     __r        = __h.release();
     __inserted = true;
@@ -1854,7 +1854,7 @@ __tree<_Tp, _Compare, _Allocator>::__emplace_hint_multi(const_iterator __p, _Arg
   __node_holder __h = __construct_node(std::forward<_Args>(__args)...);
   __end_node_pointer __parent;
   __node_base_pointer& __child = __find_leaf(__p, __parent, __h->__value_);
-  __child = static_cast<__node_base_pointer>(__h.get());
+  __child                      = static_cast<__node_base_pointer>(__h.get());
   __insert_node_at(__parent, __child);
   return iterator(static_cast<__node_pointer>(__h.release()));
 }
diff --git a/libcxx/include/map b/libcxx/include/map
index 60ed4ea0b..c9db5e996 100644
--- a/libcxx/include/map
+++ b/libcxx/include/map
@@ -1433,7 +1433,7 @@ _Tp& map<_Key, _Tp, _Compare, _Allocator>::operator[](const key_type& __k) {
   __node_pointer __r           = static_cast<__node_pointer>(__child);
   if (__child == nullptr) {
     __node_holder __h = __construct_node_with_key(__k);
-    __child = static_cast<__node_base_pointer>(__h.get());
+    __child           = static_cast<__node_base_pointer>(__h.get());
     __tree_.__insert_node_at(__parent, __child);
     __r = __h.release();
   }