[clang-tools-extra] [clang-tidy] Create bugprone-incorrect-enable-shared-from-this check (PR #102299)

[Julian Schmidt via cfe-commits]

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@@ -0,0 +1,34 @@
+.. title:: clang-tidy - bugprone-incorrect-enable-shared-from-this
+
+bugprone-incorrect-enable-shared-from-this
+==========================================
+
+Detects if a class or struct publicly inherits from 
+``std::enable_shared_from_this``, because unintended behavior will 
+otherwise occur when calling ``shared_from_this``.
+
+Consider the following code:
+
+.. code-block:: c++
+
+    #include <memory>
+
+    // private inheritance
+    class BadExample : std::enable_shared_from_this<BadExample> {
+    
+    // ``shared_from_this``` unintended behaviour
+    // libstd implementation returns uninitialized ``weak_ptr``
----------------
5chmidti wrote:

Do you mean `libstdc++`?

https://github.com/llvm/llvm-project/pull/102299