Object reading and writing overload in C-CodePudding

I know that the assignment operator can be overloaded. When writing to an object, the object's overload function is called.

Obj = 10; // Obj's assignment overload function called.

Is there a way to define a function to be called when an object is read?

int a = Obj;

In this case Obj's reading function would be called and the return value would be assigned to a.

CodePudding user response：

You're looking for what's sometimes called a cast operator.

example:

#include <iostream>

struct example
{
    int val;
    operator int() const { return val; }
};

int main ()
{
    example x{42};
    int y = x;
    std::cout << y;
}

Will print 42.