Trying to compile following code using VC 2010:

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#include <iostream>
#include <Eigen/Core>

int main()
{
   Eigen::Matrix3d m1;
   double s1 = 2.0;

   Eigen::Matrix3d m2 = s1 * m1.selfadjointView<Eigen::Upper>();

   std::cout << m2 << std::endl;

   return 0;
}

And getting an error about no operator found

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d:\myprogram\exp\eigen\eigenexp.cpp(9): error C2679: binary '*' : no operator found which takes a right-hand operand of type 'Eigen::SelfAdjointView<MatrixType,UpLo>' (or there is no acceptable conversion)

What is going wrong? Is selfadjointView supports scalar multiplication? According to http://eigen.tuxfamily.org/dox/QuickRefPage.html it is.

Same error with gcc 4.7.2 from http://nuwen.net/mingw.html

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eigenExp.cpp:9:61: error: no match for 'operator*' in 's1 * ((Eigen::MatrixBase<Eigen::Matrix<double, 3, 3> >*)(& m1))->Eigen::MatrixBase<Derived>::selfadjointView<2u>()'

This is not supported, instead do:

Eigen::Matrix3d m2 = (s1 * m1).selfadjointView<Eigen::Upper>();

ggael, thank you for your answers.