As someone who frequently writes JavaScript, I find myself particularly drawn to the syntax of this feature. While I'm uncertain about its nomenclature, here's an illustrative example:
object.function1().function2().function3()
I understand that JavaScript allows for this due to its treatment of everything as a first-class object. However, I am curious if similar functionality can be achieved in C++. Could you provide a brief example showcasing this?
In the world of C++, the keyword this acts as a pointer to the specific instance, requiring you to dereference it in order to return said instance:
return *this;
To avoid making unnecessary copies and allow for mutation of the same object, you can return a reference instead. Take a look at this illustrative example:
struct Y
{
Y& g() { std::cout << ++y << std::endl; return *this; } /*
^^ ^^^^^^^^^^^^^ */
private:
int y = 0;
};
int startup()
{
Y y;
y.g().g().g(); // Result: 1 2 3
}
Do you have something similar to this in mind:
class B{
public:
B& baz(){ return *this; };
B& qux() { return *this; };
};
followed by
B b;
b.baz().qux();
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