|Re: [eigen] problem with operator() in development branch|
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- To: eigen@xxxxxxxxxxxxxxxxxxx
- Subject: Re: [eigen] problem with operator() in development branch
- From: Benoit Jacob <jacob.benoit.1@xxxxxxxxx>
- Date: Wed, 26 May 2010 10:38:39 -0700
- Cc: Gael Guennebaud <gael.guennebaud@xxxxxxxxx>
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oh, I know about this issue.
Gael: the issue is that ProductBase doesn't allow coeff-based access.
But it inherits DenseBase. Honestly I think that it would be far
simpler if we said that by convention, and xpr inheriting DenseBase
has (usable) coeff methods. Is that OK? Do you see a big difficulty
with allowing that? If you think that's really not possible, then do
you agree that ProductBase should not inherit DenseBase anymore?
2010/5/26 Bill Greene <w.h.greene@xxxxxxxxx>:
> I'm running with a very recent version of Eigen from the development branch.
> The following code snippet works fine with Eigen 2
> Eigen::MatrixXd a(1,2), b(2,1);
> a << 1, 2;
> b << 2, 3;
> double c = (a*b)(0,0);
> std::cout << "c=" << c << std::endl;
> but I get a compilation error with VC++ 2008 and the development branch Eigen
> : error C2248: 'Eigen::ProductBase<Derived,Lhs,Rhs>::coeff' : cannot
> access private member declared in class
> Bill Greene