Hi!

Here is a sample code of the phenomenon I found:

Code: Select all

#include
#include

typedef std::vector MyVec;

int main() {
  MyVec a(1);
  MyVec b(1);

  a[0].setOnes();
  b[0] = a[0];        // ok
  b[0] = a[0] * 1.0;  // error!

  std::cout , std::allocator > >::.std::vector::operator[] [with _Tp = Eigen::ei_unaligned_type >, _Alloc = Eigen::aligned_allocator > >](0ul) = Eigen::MatrixBase::operator*(const typename Eigen::ei_traits::Scalar&) const [with Derived = Eigen::Matrix](((const double&)((const double*)(&1.0e+0))))’
./eigen2/Eigen/src/StdVector/UnalignedType.h:29: note: candidates are: Eigen::ei_unaligned_type >& Eigen::ei_unaligned_type >::operator=(const Eigen::ei_unaligned_type >&)


I am using g++ (GCC) 4.2.4 (Ubuntu 4.2.4-3ubuntu4). Why does this assignment not work?
Thanks!

This seems to be with Eigen-2.0.0. Can you try with trunk? The StdVector workaround is completely different there so I have good hopes that your problem will go away.

Gael: is this a reason to reconsider backporting?

Yes, I forgot to say, it's Eigen 2.0 stable. I will try trunk and post results later. Thanks.

bjacob wrote:This seems to be with Eigen-2.0.0. Can you try with trunk? The StdVector workaround is completely different there so I have good hopes that your problem will go away.

Gael: is this a reason to reconsider backporting?

You are right, trunk solved this issue. Thanx very much!

cornail wrote:Yes, I forgot to say, it's Eigen 2.0 stable. I will try trunk and post results later. Thanks.

bjacob wrote:This seems to be with Eigen-2.0.0. Can you try with trunk? The StdVector workaround is completely different there so I have good hopes that your problem will go away.

Gael: is this a reason to reconsider backporting?