Hi,

I am suddenly receiving errors in VS2013 on this particular header file, the errors are listed below. I am unsure if this is a bug but I cannot see anything in my code that would trigger these errors in Eigen's headers. I am also getting these errors on a slightly different xCode implementation of my project.

error C2039: 'ReturnType' : is not a member of 'Eigen::internal::scalar_product_traits<float,double>'
error C2146: syntax error : missing ';' before identifier 'Scalar'
error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
error C2868: 'Eigen::internal::traits<Derived>::Scalar' : illegal syntax for using-declaration; expected qualified-name

All occur on line 21 of diagonalproduct.h

Thanks for your help,

Kris

You are mixing float and double in the same expression which is not allowed in Eigen. You should get a more explicit error line. If that's the intended purpose, then cast the float expression to double: (blabla_float).cast<double>() * blabla_double