class design

[ashokd008]

How do i write a class 'foo' so that the following code works:
foo f;
f()()();


Can anyone tell me what this f()()() mean?
Thanks in advance.
-Ashok

[gpraghuram]

i dont think f()()() is a valid declaration in C++.
From where did u get this code?

raghu

[ashokd008]

i dont think f()()() is a valid declaration in C++.
From where did u get this code?

raghu

It think it is a valid one. I am really searching for it.

[newb16]

It's pointer to function returning pointer to function returning... 3 times such.

typedef int (*fp)();
typedef fp (*fp1)();
typedef fp1 (*foo)();

Don't ask me though how to write it in one declaration without three typedefs.

[JosAH]

Make class foo overload the function operator () and make that operator return
a reference to 'this'. That way you can even do f()()()()()()() ... ()()() as many
times as your want.

kind regards,

Jos

[gpraghuram]

Make class foo overload the function operator () and make that operator return
a reference to 'this'. That way you can even do f()()()()()()() ... ()()() as many
times as your want.

kind regards,

Jos

This is a very good learning for me....
Thanks lot Jos.

[vinothg]

Nice one !!!

#include <iostream>

using namespace std;

class foo{
public:
foo& operator () (){
return *this;
}
};

int main(){
foo()()()()()() ()()();
getchar();
}

[ashokd008]

Thanks a lot.. great ....