Can C++'s operator[] take more than one argument?

Question

Is it possible to define an overloaded operator[] that takes more than one argument? That is, can I define operator[] as follows:

  //In some class
  double operator[](const int a, const int b){
     return big_array[a+offset*b];}

and later use it like this?

double b=some_obj[7,3];

Answer 1

No you can't overload operator[] to take more than one argument. Instead of

double b = some_obj[7,3];

use

double b = some_obj[7][3];

This answer explains how to create a proxy object to be able to the latter.

Otherwise, you could just overload operator() to take 2 arguments.

Answer 2

No. The idiomatic way to do that in C++ is

double b = some_obj[7][3];