Reworked the expression evaluation mechanism in order to make it possible to efficiently compute convolutions and contractions in the future:

 * The scheduling of computation is moved out the the assignment code and into a new TensorExecutor class
 * The assignment itself is now a regular node on the expression tree
 * The expression evaluators start by recursively evaluating all their subexpressions if needed

1 files changed, 3 insertions, 1 deletions

diff --git a/unsupported/Eigen/CXX11/src/Tensor/Tensor.h b/unsupported/Eigen/CXX11/src/Tensor/Tensor.h
index 7f614bbe8..09601fc7d 100644
--- a/unsupported/Eigen/CXX11/src/Tensor/Tensor.h
+++ b/unsupported/Eigen/CXX11/src/Tensor/Tensor.h
@@ -236,7 +236,9 @@ class Tensor : public TensorBase<Tensor<Scalar_, NumIndices_, Options_> >
       // FIXME: we need to resize the tensor to fix the dimensions of the other.
       // Unfortunately this isn't possible yet when the rhs is an expression.
       // resize(other.dimensions());
-      internal::TensorAssign<Tensor, const OtherDerived>::run(*this, other);
+      typedef TensorAssignOp<Tensor, const OtherDerived> Assign;
+      Assign assign(*this, other);
+      internal::TensorExecutor<const Assign, DefaultDevice>::run(assign, DefaultDevice());
       return *this;
     }