Is there any way to save pointer to class method, and call it later?
I know about ptr, and funcptr properties of delegates. I tried to change
ptr and or funcptr manually after delegate was obtained. It worked in
some situations. I don't know if it is a correct use of delegate:
import std.writeln;
class Foo
{
string name;
this(string e)
{
name = e;
}
void Print()
{
writeln("Print on ", name);
}
void Print2()
{
writeln("Print2 on ", name);
}
}
auto foo = new Foo("foo");
auto dg = &foo.Print;
auto foo2 = new Foo("foo2");
dg(); // Print on foo
dg.ptr = foo2;
dg(); // Print on foo2
dg.funcptr = &Foo.Print2;
dg(); // Print2 on foo2
The problem i see is that in funcptr there is real entry point for
method used, not the index in virtual table, so the polymorphism can't
work with that.
As I have written - i don't know whether it is correct use for delegate.
Possibly the ptr, funcptr should be both const (Then is it possible to
call method on object like in C++ ->* or .*?)
If not, then maybe delegates should work a little different.
