Re: [eigen] Convert 1x1 matrix to internal type?

[Christoph Hertzberg <chtz@xxxxxxxxxxxxxxxxxxxxxxxx>]

Christoph Hertzberg wrote:
> David Roundy wrote:
>> Personally, I'd greatly prefer not to have any implicit conversion
>> from matrices to doubles, with the possible exception of when it's
>> known at compile time to be a 1x1 matrix.  It sounds otherwise like a
>> recipe for bugs.
> 
> I agree on that. In most practical situations this should be the case.
> 
> Another question would be to allow things like:
> 
>   Eigen::Vector3d a, b, c;
>   a.transpose() * b * c;

I just noted that in this case one could already write:
  c * (a.transpose() * b);

So replace c by an arbitrary matrix in this example ...


> or only explicitly:
> 
>   double(a.transpose()*b) * c;
> 
> 
> Christoph

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Dipl.-Inf. Christoph Hertzberg
Cartesium 0.051
Universität Bremen
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