It is a bad idea to derive from a class which destructor is not virtual like multi_array You should better use composition (i.e. multi_array is a member of your matrix class). Regards, F. Bron boost-users-bounces@lists.boost.org a écrit sur 04/03/2008 16:21:12 :

Hi list members,

This is a more or less a general kind of " how to extend container classes" question - I'm trying to write a class which inherits from boost::multi_array - the to get a kind of matrix class with some additional service routines. Maybe it is a lack of experience - but I for the time being I don't know how to solve the problem to access the constructor of multi_array in my own class to initialize my matrix class - my current guess was to use the "this" pointer but it had not worked out like I supposed it to do.

class NetworkMultiArray: public boost::multi_array { public: NetworkMultiArray(int); virtual ~NetworkMultiArray(); };

Here is the constructor code:

NetworkMultiArray::NetworkMultiArray(int length) { this::iterator iter3; typedef this::template subarray<2>::type::iterator iter2; typedef this::template subarray<1>::type::iterator iter1;

for( iter1 i = *this.begin(); iter1 != *this.end(); iter1++){ for(iter2 ii = (*i).begin(); ii != (*i).end(); ii++){ for(iter3 iii = (*ii).begin(); iii != (*ii).end(); iii++){ *iii = 0.0 ; } } } } sure this does not work - and is the result from trying to adapt the iterator example from the documentation.

my aim is to handle the NetworkMultiArray like a boost::multi_array and initialize it to zero - further it would be nice if somebody could tell me how I could assign a length to the array and the subarrays. The key-point is that I want to use my class (NetworkMultiArray) like a multi_array by inheritance of the multi_array features of boost:multi_array.

Thank you very much in advance. Best regards Stefan

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