Как перегрузить оператор << в классе?

#include "pch.h"
#include <iostream>
#include <string>
#include "ccolor.h"
#include "Edit.h"
 
 
 
int main()
{
    Edit e;
 
    e.setPosition(7, 3);
    e.setLenght(6);
    e.setText("Ala");
    e.setTextColor(Edit::White);
    e.setBackgroundColor(Edit::Blue);
 
    e.display();
 
    std::string s = e.getText();
    e.userText();
    s = e.getText();
    
    std::cout << red << "A"<< green << "l" << blue << "a" << white << "ma";
    //std::cout << SetColor(FOREGROUND_RED | FOREGROUND_GREEN) << s;
    //std::cout << defcolor << std::endl;
 
    return 0;
}

std::cout << red << "A"<< green << "l" << blue << "a" << white << "ma";

#include "Edit.h"
 
#ifndef CCOLOR_H
#define CCOLOR_H
 
enum cMode { red, green, blue, white };
 
class ccolor : protected Edit
{
public:
 
    ccolor();
    ~ccolor();
 
    ccolor operator<<(cMode x);
};
#endif

#include <iostream>
 
struct Struct
{
    int i = 0;
};
 
std::ostream& operator<<(std::ostream& stream, const Struct s)
{
    return stream << s.i;
}
 
int main()
{
    std::cout << Struct{};
    return 0;
}

std::ostream& operator<<(std::ostream& out, cMode val)
{
    switch (val)
    {
    case red: out << "RED"; break;
.......................
    default: out << int(val);
    }
    return out;
}