From 2660d01fa7509cbe7649ebf5be6f999c856ed6e9 Mon Sep 17 00:00:00 2001
From: Christoph Hertzberg <chtz@informatik.uni-bremen.de>
Date: Sat, 27 Feb 2021 18:25:48 +0100
Subject: Inherit from `no_assignment_operator` to avoid implicit copy
 constructor warnings

(cherry picked from commit 9bbb7ea4b54b1f307863be4ed8d105c38cdefe50)
---
 unsupported/Eigen/CXX11/src/Tensor/TensorContraction.h | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

(limited to 'unsupported')

diff --git a/unsupported/Eigen/CXX11/src/Tensor/TensorContraction.h b/unsupported/Eigen/CXX11/src/Tensor/TensorContraction.h
index 605d72c8d..424caced1 100644
--- a/unsupported/Eigen/CXX11/src/Tensor/TensorContraction.h
+++ b/unsupported/Eigen/CXX11/src/Tensor/TensorContraction.h
@@ -362,7 +362,7 @@ class TensorContractionOp : public TensorBase<TensorContractionOp<Indices, LhsXp
 
 
 template<typename Derived>
-struct TensorContractionEvaluatorBase
+struct TensorContractionEvaluatorBase : internal::no_assignment_operator
 {
   typedef typename internal::traits<Derived>::Indices Indices;
   typedef typename internal::traits<Derived>::LeftArgType LeftArgType;
@@ -934,8 +934,6 @@ struct TensorContractionEvaluatorBase
   EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE EvaluatorPointerType data() const { return m_result; }
 
 protected:
-  // Prevent assignment
-  TensorContractionEvaluatorBase& operator = (const TensorContractionEvaluatorBase&);
   Dimensions m_dimensions;
 
   contract_t m_k_strides;
-- 
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