Re: [eigen] proposal to use static const integer class members instead of enum values

[Christoph Hertzberg <chtz@xxxxxxxxxxxxxxxxxxxxxxxx>]

On 14.12.2014 09:12, Marc Glisse wrote:
> The main goal of deriving from integer_constant is to have only one
> class that needs the definition, as long as the constant is always
> called value. But since in Eigen the constants can have many, many
> different names (IsColVector, ExpandMem, RowsAtCompileTime, OuterSize,
> etc) it wouldn't gain much if anything.

A maybe feasible alternative would be to put all these into DenseBase 
(or EigenBase). This would require writing

template<Derived>
const Index class DenseBase<Derived>::RowsAtCompileTime;
//...

only once. I guess they can still be initialized via
  internal::traits<Derived>::RowsAtCompileTime;


Christoph


--
----------------------------------------------
Dipl.-Inf., Dipl.-Math. Christoph Hertzberg
Cartesium 0.049
Universität Bremen
Enrique-Schmidt-Straße 5
28359 Bremen

Tel: +49 (421) 218-64252
----------------------------------------------