Re: [ublas] Beginner questions

From: Nico Galoppo (nico_at_[hidden])
Date: 2007-05-20 19:39:10

Hmm, does size_m() work? I seem to remember this being an issue due to member 
naming changes.

--nico

Markus Weimer wrote:
> Hi,
> 
> I still seem unable to mix&match the different matrix types at will.
> The following code does not compile:
> 
> void printDimension(const matrix_expression<double>& m){
> 	cout << m().size1() << endl;
> }
> 
> The error message is:
> 
> error: request for member 'size1' in '(+
> m)->boost::numeric::ublas::matrix_expression<E>::operator() [with E =
> double]()', which is of non-class type 'const double'
> ./boost/numeric/ublas/expression_types.hpp: In member function 'const
> E& boost::numeric::ublas::matrix_expression<E>::operator()() const
> [with E = double]':
> testBoost.cpp:11:   instantiated from here
> ./boost/numeric/ublas/expression_types.hpp:308: error: invalid
> static_cast from type 'const
> boost::numeric::ublas::matrix_expression<double>* const' to type
> 'const double*'
> 
> I think I am missing something dead obvious, as polymorphism has been
> around for a loong time ;-)
> 
> Any hints?
> 
> Thanks,
> 
> Markus
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-- 
Nico Galoppo        UNC-CH PhD. student        http://www.ngaloppo.org
                       [phone]