How do I use heterogeneous lookup with std::vector?

Heterogeneous lookup allows you to access elements of different types from a collection like std::vector. In C++, std::vector can store objects of a common base class, allowing for polymorphic behavior. Below is an example demonstrating how to do this.


        #include <iostream>
        #include <vector>
        #include <memory>

        class Base {
        public:
            virtual void show() const {
                std::cout << "Base class" << std::endl;
            }
            virtual ~Base() {}
        };

        class DerivedA : public Base {
        public:
            void show() const override {
                std::cout << "DerivedA class" << std::endl;
            }
        };

        class DerivedB : public Base {
        public:
            void show() const override {
                std::cout << "DerivedB class" << std::endl;
            }
        };

        int main() {
            std::vector<std::unique_ptr<Base>> vec;
            vec.push_back(std::make_unique<DerivedA>());
            vec.push_back(std::make_unique<DerivedB>());

            for (const auto& item : vec) {
                item->show(); // Heterogeneous lookup
            }

            return 0;
        }

C++ heterogeneous lookup std::vector polymorphism base class derived class unique_ptr

How do I use heterogeneous lookup with std::vector?

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How do I use heterogeneous lookup with std::vector?

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