Several compilation fixes for MSVC and NVCC, basically:

- added explicit enum to int conversion where needed
- if a function is not defined as declared and the return type is "tricky"
  then the type must be typedefined somewhere. A "tricky return type" can be:
  * a template class with a default parameter which depends on another template parameter
  * a nested template class, or type of a nested template class

1 files changed, 1 insertions, 1 deletions

diff --git a/Eigen/src/QR/QR.h b/Eigen/src/QR/QR.h
index 6e2f9c546..8ca787c2a 100644
--- a/Eigen/src/QR/QR.h
+++ b/Eigen/src/QR/QR.h
@@ -168,7 +168,7 @@ MatrixType QR<MatrixType>::matrixQ(void) const
   * \sa class QR
   */
 template<typename Derived>
-const QR<typename ei_eval<Derived>::type>
+const QR<typename MatrixBase<Derived>::EvalType>
 MatrixBase<Derived>::qr() const
 {
   return QR<typename ei_eval<Derived>::type>(derived());