PolyH

PolyH - Polymorphic Helpers

VirtualBase

Curiously recurring template pattern solution with supporting multilevel inheritance and without suffering from diamond problem.

    #include "detail/polyh/crtp_macro.hpp"
    #include "detail/polyh/virtual_base.hpp"
    #include <iostream>
    constexpr int forty_and_two{42};
    template<typename Derived>
    class Question : public marklar::detail::polyh::VirtualBase<Derived, Question> {
    public:
        void print_answer() const noexcept
        {
            std::cout << CRTP_UNDERLYING.answer() << " - The Answer to the Ultimate Question of Life, The Universe, and Everything.\n";
        }
    };
    class Answer : public Question<Answer> {
        CRTP_FRIEND(Question<Answer>)
    protected:
        constexpr int answer() const noexcept
        {
            return forty_and_two;
        }
    };
    int main()
    {
        Answer answare;
        answare.print_answer();
        return 0;
    }

VirtualAssign

Work in progress

VirtualCompare

Work in progress