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1.. title:: clang-tidy - cppcoreguidelines-slicing2 3cppcoreguidelines-slicing4=========================5 6Flags slicing of member variables or vtable. Slicing happens when copying a7derived object into a base object: the members of the derived object (both8member variables and virtual member functions) will be discarded. This can be9misleading especially for member function slicing, for example:10 11.. code-block:: c++12 13 struct B { int a; virtual int f(); };14 struct D : B { int b; int f() override; };15 16 void use(B b) { // Missing reference, intended?17 b.f(); // Calls B::f.18 }19 20 D d;21 use(d); // Slice.22 23This check implements `ES.6324<https://isocpp.github.io/CppCoreGuidelines/CppCoreGuidelines#es63-dont-slice>`_25and `C.14526<https://isocpp.github.io/CppCoreGuidelines/CppCoreGuidelines#c145-access-polymorphic-objects-through-pointers-and-references>`_27from the C++ Core Guidelines.28