C++ Insights

Source:

#include <iostream>

template<typename T>
class Container {
    
    public:
        Container() : data() { }

Container(const Container &c) : data(c.data) {
            std::cout << "COPY CONSTRUCTOR" << std::endl;
        }

// This is what I call a "templated copy constructor".
        // If I remove this, the operator=() does not compile with a different type
        template<class U>
        Container(const Container<U> &c) : data(c.getData()) {
            std::cout << "TEMPLATE COPY CONSTRUCTOR??" << std::endl;
        }

Container &operator=(const Container &c) {
            std::cout << "assignment operator" << std::endl;

if (this == &c)
                return *this;

this->data = c.getData();
            return *this;
        }

const T &getData() const {
            return this->data;
        }

private:
        T data;
};

int main() {

Container<int> c1;
    Container<float> c2;

c2 = c1; // Assigning a Container<int> to a Container<float>

return 0;
}

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