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From: neath@solar-1.stars.flab.Fujitsu.JUNET
Newsgroups: comp.lang.c++
Subject: operator[][]?
Message-ID: <NEATH.89May15154230@solar-1.stars.flab.Fujitsu.JUNET>
Date: 15 May 89 06:42:30 GMT
Sender: news@ti-csl.csc.ti.com
Distribution: comp.lang.c++
Organization: Texas Instruments Data Systems Group, Austin TX
Lines: 43

I  am trying to  determine what support there  is in C++  for multi-dimensional
arrays within a class. For example, the following class  definition attempts to
implement an array of pointers  to vectors.   Now, I  know that  I can overload
operator[],  but  what I would really  like to be able  to  do  is overload the
ficticious  operator[][]. How can  I achieve  this  functionality? Am I missing
something very obvious?

        typedef int Type
        
        class C {
        private:
          int r, c;
          Type** data;
        public:
          X (int row, int col) {
            this->r = row; this->c = col;
            this->data = new Type* [row];
            for (int i = 0; i < col; i++)
              this->data[i] = new Type [col];
          }
        
          ~X () {
            for (int i = 0; i < r; i++)
              delete this->data[i];
            delete this->data;
          }
        
          inline Type* operator[] (int row) {
            return this->data[row];
          }
        
          inline Type& operator[][] (int row, int col) {
            return this->data[row][col];
          }
        };
        

Regards
Martin Neath <neath@dsg.ti.com>
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 DISCLAIMER: As always, the opinions expressed above are strictly my own
 and do not reflect those of my employer, Texas Instruments.
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