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From: Yan Zhang (Yan.Zhang_at_[hidden])
Date: 2005-06-06 12:09:38

I'm read the posting by Thomas and replay by Ronald on how to inherit
from boost::multi_array as following:
On Oct 2, 2004, at 10:26 AM, Thomas Mensch wrote:
Dear List,
I am using boost 1.31.0 on Linux (with gcc 3.3.2)
I would like to create a 2D array class, which inherits from
boost::multi_array<double, 2> class. However I have problems
with the copy constructor of my class Array. Below is the code,
which I am trying to run.

#include <boost/multi_array.hpp>

class Array
: public boost::multi_array<double,2>
Array (void) :
boost::multi_array<double, 2> ()

Array (const int nrow, const int ncol) :
boost::multi_array<double, 2> (boost::extents[nrow][ncol])

Array (const Array& other) :
boost::multi_array<double, 2> (other)

~Array (void)

Array& operator= (const Array& rhs)
if (&rhs != this)
boost::multi_array<double, 2>::operator= (rhs);
return *this;
}; /* class Array */



Ronald's replay:

Greetings Thomas,

Though you did not supply the error message from your compiler, I
suspect that the problem is this: multi_array has a templated
constructor of the form:
template <class T> multi_array(T const&);

that will match your Array type better than the constructor with the

multi_array(multi_array<double,2> const&);

In short, overload resolution is not selecting the constructor that you
desire. You'll need to coerce your Array reference to a
multi_array<double,2> reference before passing it to the constructor.

Hope this helps.

I had the same problem as Thomas'. I don't quit understand Ronald's
comment. How to you overload template <class T> multi_array(T const&)
instead of multi_array(multi_array<double,2> const&)? I thought Thomas'
code is overloading template <class T> multi_array(T const&).


Thanks in advance,




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