Hi,

I am using eclipse mars with cdt and I am having problems to get the indexer to work with the eigen library (3.2.7) in a makefile project.
Most of the library is getting indexed fine, but for example:

Code: Select all

#include <Eigen/Core> // ok
Eigen::MatrixXcd m; // ok
m.setConstant(2, 2, std::complex<double>{1.0}); // ok
m(0,0).real(); //method 'real' could not be resolved
m.real()(0,0); //ok


I was searching through the lib a little.
In CommonCwiseUnaryOps.h:109 we have:

Code: Select all

inline RealReturnType
real() const { return derived(); }


which seems to be a member function, but of which class ? and where is it declared ?
maybe the inlining screws the indexer ?

is anybody here using eclipse ide and got the indexer to work ?

thanks!!

hm, the member you are showing in CommonCwiseUnaryOps.h, is the one called in the last line for which you said it's OK:

Code: Select all

m.real()(0,0); //ok


the one that does not work is std::complex::real.

Hi!

The problem also goes away if I cast to std::complex<double> explicitly:

Code: Select all

std::complex<double>(m(0,0)).real(); //ok!


could it be that the indexing operator [.(0,0)] returns something else than std::complex<double> ?

Can you explain to me how .real() (the one from eigen) becomes a member function of MatrixXcd ? All I see is this little inline statement
I posted and I do not get where it is said which class this belongs to. That probably does not solve the
indexer problem for me, but I am curious.

cheers!

you don't wanna know (the file is included in the body of the DenseBase and SparseMatrixBase classes)