-new: recursive costs system, useful to determine automatically

 when to evaluate arguments and when to meta-unroll.
-use it in Product to determine when to eval args. not yet used
 to determine when to unroll. for now, not used anywhere else but
 that'll follow.
-fix badness of my last commit

1 files changed, 1 insertions, 1 deletions

diff --git a/Eigen/src/Core/Swap.h b/Eigen/src/Core/Swap.h
index db096e6f2..cffdb1cc6 100644
--- a/Eigen/src/Core/Swap.h
+++ b/Eigen/src/Core/Swap.h
@@ -63,7 +63,7 @@ void MatrixBase<Derived>::swap(const MatrixBase<OtherDerived>& other)
   }
   else // SizeAtCompileTime != Dynamic
   {
-    typename Eval<Derived>::MatrixType buf(*this);
+    typename Derived::Eval buf(*this);
     *this = other;
     *_other = buf;
   }