From e42dceb3a1ec53f7769aa32f9e709a4c24d6ed3f Mon Sep 17 00:00:00 2001
From: "C. Antonio Sanchez" <cantonios@google.com>
Date: Sat, 22 Feb 2025 08:36:05 -0800
Subject: [PATCH] Fix implicit copy-constructor warning in TensorRef.

---
 unsupported/Eigen/CXX11/src/Tensor/TensorRef.h | 14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

diff --git a/unsupported/Eigen/CXX11/src/Tensor/TensorRef.h b/unsupported/Eigen/CXX11/src/Tensor/TensorRef.h
index e12923da0..98223fe79 100644
--- a/unsupported/Eigen/CXX11/src/Tensor/TensorRef.h
+++ b/unsupported/Eigen/CXX11/src/Tensor/TensorRef.h
@@ -247,6 +247,8 @@ class TensorRef : public internal::TensorRefBase<TensorRef<PlainObjectType>> {
 
   EIGEN_STRONG_INLINE TensorRef() : Base() {}
 
+  EIGEN_STRONG_INLINE TensorRef(const TensorRef& other) : Base(other) {}
+
   template <typename Expression>
   EIGEN_STRONG_INLINE TensorRef(const Expression& expr) : Base(expr) {
     EIGEN_STATIC_ASSERT(internal::is_lvalue<Expression>::value,
@@ -254,6 +256,8 @@ class TensorRef : public internal::TensorRefBase<TensorRef<PlainObjectType>> {
                         "TensorRef<const Expression>?)");
   }
 
+  TensorRef& operator=(const TensorRef& other) { return Base::operator=(other).derived(); }
+
   template <typename Expression>
   EIGEN_STRONG_INLINE TensorRef& operator=(const Expression& expr) {
     EIGEN_STATIC_ASSERT(internal::is_lvalue<Expression>::value,
@@ -262,8 +266,6 @@ class TensorRef : public internal::TensorRefBase<TensorRef<PlainObjectType>> {
     return Base::operator=(expr).derived();
   }
 
-  TensorRef& operator=(const TensorRef& other) { return Base::operator=(other).derived(); }
-
   template <typename... IndexTypes>
   EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE Scalar& coeffRef(Index firstIndex, IndexTypes... otherIndices) {
     const std::size_t num_indices = (sizeof...(otherIndices) + 1);
@@ -306,17 +308,17 @@ class TensorRef<const PlainObjectType> : public internal::TensorRefBase<TensorRe
  public:
   EIGEN_STRONG_INLINE TensorRef() : Base() {}
 
+  EIGEN_STRONG_INLINE TensorRef(const TensorRef& other) : Base(other) {}
+
   template <typename Expression>
   EIGEN_STRONG_INLINE TensorRef(const Expression& expr) : Base(expr) {}
 
+  TensorRef& operator=(const TensorRef& other) { return Base::operator=(other).derived(); }
+
   template <typename Expression>
   EIGEN_STRONG_INLINE TensorRef& operator=(const Expression& expr) {
     return Base::operator=(expr).derived();
   }
-
-  TensorRef(const TensorRef& other) : Base(other) {}
-
-  TensorRef& operator=(const TensorRef& other) { return Base::operator=(other).derived(); }
 };
 
 // evaluator for rvalues
-- 
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