C++ 20 - lezione 9

#include <iostream>
#include <concepts>
#include <format>

using namespace std;

template <typename T>
concept Number = integral<T> || floating_point<T>;

template <typename T1, typename T2>
concept Number2 = integral<T1> && floating_point<T2>;

template <typename T1, typename T2>
requires Number2<T1, T2>
T1 somma2(T1 a, T2 b) {
    return a + b;
}

template <typename T>

T somma(T a, T b) requires Number<T> {
    return a + b;
}

struct Punto3D {
    int x = 0;
    int y = 0;
    int z = 0;
};

struct Punto2D {
    int x = 0;
    int y = 0;

    Punto2D operator +(Punto3D &altro) const
    {
        return Punto2D{x+altro.x, y+altro.y};
    }
};



int main()
{
    Punto2D p1 { 5, 10 };
    Punto3D p2{ 4, -9, 12 };

    /*auto p3 = somma2<Punto2D, Punto3D>(p1, p2);
    cout << format("Punto risultato: ({},{})\n", p3.x, p3.y);*/

    cout << somma<int>(5, 3) << endl;
    cout << somma<double>(3.15, 56) << endl;


    //cout << somma2<int>(5, 3) << endl;
    //cout << somma2<double>(3.15, 56) << endl;
    //cout << somma2<double>(56, 3.15) << endl;
    cout << somma2(56, 3.15) << endl;
    cout << somma2<int>(56, 3.15) << endl;
    cout << somma2<int, double>(56, 3.15) << endl;

  //cout << somma<string>("ciao", " a tutti") << endl;



}