* fix in IO.h, a useless copy was made because of assignment from

  Derived to MatrixBase.
* the optimization of eval() for Matrix now consists in a partial
  specialization of ei_eval, which returns a reference type for Matrix.
  No overriding of eval() in Matrix anymore. Consequence: careful,
  ei_eval is no longer guaranteed to give a plain matrix type!
  For that, use ei_plain_matrix_type, or the PlainMatrixType typedef.
* so lots of changes to adapt to that everywhere. Hope this doesn't
  break (too much) MSVC compilation.
* add code examples for the new image() stuff.
* lower a bit the precision for floats in the unit tests as
  we were already doing some workarounds in inverse.cpp and we got some
  failed tests.

1 files changed, 2 insertions, 2 deletions

diff --git a/Eigen/src/QR/QR.h b/Eigen/src/QR/QR.h
index 94b817a02..c19205816 100644
--- a/Eigen/src/QR/QR.h
+++ b/Eigen/src/QR/QR.h
@@ -169,10 +169,10 @@ MatrixType QR<MatrixType>::matrixQ(void) const
   * \sa class QR
   */
 template<typename Derived>
-const QR<typename MatrixBase<Derived>::EvalType>
+const QR<typename MatrixBase<Derived>::PlainMatrixType>
 MatrixBase<Derived>::qr() const
 {
-  return eval();
+  return QR<PlainMatrixType>(eval());
 }