I am creating a matrix math library which I would like to give the user access an element in the NxM 2D array, that was allocated in the constructor. I've been reading that you can't overload the [][]. How would I be able to overload this overload this operator so that the user can access an element in a two dimensional space.
Evan
Jump to Posthttp://www.parashift.com/c++-faq-lite/operator-overloading.html#faq-13.10
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Nobody can overload[][]because[][]is NOT an operator at all. This construct designates TWO[]binary operators in succession. It's a senseless construct in C++.
http://www.parashift.com/c++-faq-lite/operator-overloading.html#faq-13.10
And the next few entries as well.
Ok thanks that helps. I didn't know [][] could be a performance hit over (,)
About this thread title.
Nobody can overload [][] because [][] is NOT an operator at all. This construct designates TWO [] binary operators in succession. It's a senseless construct in C++.
Try overload operator().
Try overload operator().
This Fortran-like form of 2D array element accessor via overloaded operator(int,int) does not fit in C++ regular 2D array access style. I think it's not the best idea to introduce different accessor syntax for class Matrix objects (as m(i,j) ) and regular 2D arrays (as m[i][j] . Probably it's confused and error-prone approach. Besides that we need to define yet another member to get pointers to matrix rows...
It's a moot point, of course...
Yea I agree. I'm going to work with (int, int) for right now but I would like to supply [][] down the road to the user if that's the from that they're familiar with.
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