[ublas] size_type for mapped_matrix

Subject: [ublas] size_type for mapped_matrix
From: Alex Hagen-Zanker (ahh34_at_[hidden])
Date: 2011-04-13 05:08:10

Dear All,

I am using a mapped_matrix as a sparse matrix for a matrix with 
dimensions 120 000 * 120 000. As this exceeds the limits of size_t I 
thought to step away from the default template parameters and use:

     mapped_matrix<double, row_major, map_std<long long, double> > myMatrix

This does not solve my problem as the mapped_matrix::size_type is still 
size_t. Looking at the ublas source code I see that 
mapped_matrix::size_type boils down to std::map<long long, 
double>::size_type.

It seems to me that this should be std::map<long long, double>::key_type 
instead.

Is this a bug, or am I expecting too much?

Can I use one of the other sparse matrix types instead?

Thanks, Alex