C++ 的靜態多型：CRTP

[kuangyu0801]

• https://viml.nchc.org.tw/curiously-recurring-template-pattern/
• https://pabloariasal.github.io/2017/06/10/understanding-virtual-tables/

[kuangyu0801]

template <class T>
class Base
{
public:
  void interface()
  {
    static_cast<T*>(this)->implementation();
  }

private:
  Base() = default;
  friend T;
//  ...
};

class Derived : public Base<Derived> {
public:
  void implementation() {}

};

Pro: Compile time, not dynamic dispatch via Vtable and Vpointer Con: The derived class of CRTP type is not of the same type. They don't actually inherit the same base class