hi, I tried your code in gcc295 without any problem. I think
VC++6 does not support template partial specialization.


Frank Zhong


Sent via Deja.com http://www.deja.com/
Before you buy.


[ comp.std.c++ is moderated.  To submit articles, try just posting with ]
[ your news-reader.  If that fails, use mailto:std-c++@ncar.ucar.edu    ]
[              --- Please see the FAQ before posting. ---               ]
[ FAQ: http://reality.sgi.com/austern_mti/std-c++/faq.html              ]

Hi  Experts:
In my work, I often need to dynamically allocate multi-dimensional
arrays.  For example,

      int   **p;
      p = new  int*[5];
      for( int i = 0; i < 5; ++i)
              p[i] = new int[100];

In one of my recent programs, I needed a  " T ****p " (sorry for this
ugly creature, there is reason for having it, but it  is not the point
of this posting).   Tired of writing for-loops to do the allocation, I
cooked up some template functions to do the job. They are listed here:

----------------------------------------------
template<class T> inline void allocate_marray(T &p,size_t *s) {}
template<class T> inline void free_marray(T &p, size_t *s) {}
template<class T>
inline void allocate_marray(T * &p, size_t *sarray) {
    p = new T [ sarray[0] ];
    for( size_t i = 0; i < sarray[0]; ++i)
        allocate_marray(p[i],sarray+1);
}

template<class T>
inline void free_marray(T * &p, size_t *sarray) {
     for( size_t i = 0; i < sarray[0]; ++i)
        free_marray(p[i],sarray+1);
     delete[] p;
}
--------------------------------------------------

in my program I do this:

         double ****p;
         size_t      dims[] = {5,5,5,1000};
         allocate_marray(p,dims);
           .............
          free_marray(p,dims);

When  "allocate_marray(T  *&p, ....)" is called the first time, the"T"
in the template function is "double***";
the second time  (recursive call),  "T" is  "double**"; the 3rd time,
"T" is "double *"; the 4th time , "T" is  "double"
the 5th time, "allocate_marray( T &p, ....)" is called, which does
nothing and hence terminates the recursion.

This works perfectly fine with the Digital C++ compiler  I have on a
Dec-alpha work station, but fails to compile
with MS-VC++6.  This is not the first time I have trouble with VC++.

My question is: am I doing something wrong here or  is  the VC++
compiler simply not very smart?
 **************************************************************
  *  Fei Li,                | (757)-865-0818                   *
  *  High Technology Corp.  | fli@htc-tech.com                 *
  *  28 Research Drive      | http://www.htc-tech.com/home/fli *
  *  Hampton, VA23666       |                                  *
  **************************************************************


---
[ comp.std.c++ is moderated.  To submit articles, try just posting with ]
[ your news-reader.  If that fails, use mailto:std-c++@ncar.ucar.edu    ]
[              --- Please see the FAQ before posting. ---               ]
[ FAQ: http://reality.sgi.com/austern_mti/std-c++/faq.html              ]