================ @@ -0,0 +1,47 @@ +.. title:: clang-tidy - bugprone-smartptr-reset-ambiguous-call + +bugprone-smartptr-reset-ambiguous-call +====================================== + +Finds potentially erroneous calls to ``reset`` method on +smart pointers when the pointee type also has a ``reset`` method. +Having a ``reset`` method in both classes makes it easy to accidentally +make the pointer null when intending to reset the underlying object. + +.. code-block:: c++ + + struct Resettable { + void reset() { /* Own reset logic */ } + }; + + auto ptr = std::make_unique<Resettable>(); + + ptr->reset(); // Calls underlying reset method + ptr.reset(); // Makes the pointer null + +Both calls are valid C++ code, but the second one might not be +what the developer intended, as it destroys the pointed-to object +rather than resetting its state. +It's easy to make such a typo because the difference +between ``.`` and ``->`` is really small. + +The recommended approach is to make the intent explicit by +using either member access or direct assignment: + +.. code-block:: c++ + + std::unique_ptr<Resettable> ptr = std::make_unique<Resettable>(); + + (*ptr).reset(); // Clearly calls underlying reset method + ptr = nullptr; // Clearly makes the pointer null + +The default smart pointers that are considered are ``std::unique_ptr``, +``std::shared_ptr``. To specify other smart pointers or +other classes use the :option:`SmartPointers` option. + +Options +------- + +.. option:: SmartPointers + + Semicolon-separated list of class names of custom smart pointers. ---------------- vbvictor wrote:
Done https://github.com/llvm/llvm-project/pull/121291 _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits