The Curiously Recurring Template Pattern (CRTP) `struct D : Base ` is mainly used to:

Reduce the number of template instantiations the compiler has to generate overall

Enable virtual inheritance between the base and the derived class without duplication

Provide dynamic_cast support so the base can recover the most-derived object type

Achieve runtime polymorphism without vtable indirection by static dispatch

Multiple ChoiceHard 45s

CRTP Mixin Purpose

The Curiously Recurring Template Pattern (CRTP) `struct D : Base<D>` is mainly used to:

Options

1Reduce the number of template instantiations the compiler has to generate overall
2Enable virtual inheritance between the base and the derived class without duplication
3Provide dynamic_cast support so the base can recover the most-derived object type
4Achieve runtime polymorphism without vtable indirection by static dispatch

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