Let's use an example:
----
import std.stdio;
class Visitor {
public:
void visit(inout A) {
writeln("visit A");
}
void visit(inout B) {
writeln("visit B");
}
}
class A {
public:
void accept(Visitor v) inout {
v.visit(this);
}
}
class B : A {
public:
override void accept(Visitor v) inout {
v.visit(this);
}
}
----
This piece of code works for both versions below:
#1:
----
void main() {
A a = new A();
A b = new B();
Visitor v = new Visitor();
a.accept(v);
b.accept(v);
}
----
#2:
----
void main() {
const A a = new A();
const A b = new B();
Visitor v = new Visitor();
a.accept(v);
b.accept(v);
}
----
Thanks to the wildcard modifier inout. Is there any possible way
to do the same in C++?
