From a3521d743c706e6010039567f1eb019b03264972 Mon Sep 17 00:00:00 2001
From: Christoph Hertzberg <chtz@informatik.uni-bremen.de>
Date: Sat, 27 Feb 2021 17:51:16 +0100
Subject: [PATCH] Fix some enum-enum conversion warnings

(cherry picked from commit 838f3d8ce22a5549ef10c7386fb03040721749a0)
---
 Eigen/src/Jacobi/Jacobi.h                                   | 2 +-
 Eigen/src/SuperLUSupport/SuperLUSupport.h                   | 6 +++---
 .../Eigen/src/KroneckerProduct/KroneckerTensorProduct.h     | 4 ++--
 3 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/Eigen/src/Jacobi/Jacobi.h b/Eigen/src/Jacobi/Jacobi.h
index bfb9dcb08..76668a574 100644
--- a/Eigen/src/Jacobi/Jacobi.h
+++ b/Eigen/src/Jacobi/Jacobi.h
@@ -453,7 +453,7 @@ EIGEN_DEVICE_FUNC
 void /*EIGEN_DONT_INLINE*/ apply_rotation_in_the_plane(DenseBase<VectorX>& xpr_x, DenseBase<VectorY>& xpr_y, const JacobiRotation<OtherScalar>& j)
 {
   typedef typename VectorX::Scalar Scalar;
-  const bool Vectorizable =    (VectorX::Flags & VectorY::Flags & PacketAccessBit)
+  const bool Vectorizable =    (int(VectorX::Flags) & int(VectorY::Flags) & PacketAccessBit)
                             && (int(packet_traits<Scalar>::size) == int(packet_traits<OtherScalar>::size));
 
   eigen_assert(xpr_x.size() == xpr_y.size());
diff --git a/Eigen/src/SuperLUSupport/SuperLUSupport.h b/Eigen/src/SuperLUSupport/SuperLUSupport.h
index 190210da8..d1d3ad7f1 100644
--- a/Eigen/src/SuperLUSupport/SuperLUSupport.h
+++ b/Eigen/src/SuperLUSupport/SuperLUSupport.h
@@ -217,12 +217,12 @@ struct SluMatrix : SuperMatrix
     res.setScalarType<typename MatrixType::Scalar>();
 
     // FIXME the following is not very accurate
-    if (MatrixType::Flags & Upper)
+    if (int(MatrixType::Flags) & int(Upper))
       res.Mtype = SLU_TRU;
-    if (MatrixType::Flags & Lower)
+    if (int(MatrixType::Flags) & int(Lower))
       res.Mtype = SLU_TRL;
 
-    eigen_assert(((MatrixType::Flags & SelfAdjoint)==0) && "SelfAdjoint matrix shape not supported by SuperLU");
+    eigen_assert(((int(MatrixType::Flags) & int(SelfAdjoint))==0) && "SelfAdjoint matrix shape not supported by SuperLU");
 
     return res;
   }
diff --git a/unsupported/Eigen/src/KroneckerProduct/KroneckerTensorProduct.h b/unsupported/Eigen/src/KroneckerProduct/KroneckerTensorProduct.h
index 582fa8512..6a9b0be88 100644
--- a/unsupported/Eigen/src/KroneckerProduct/KroneckerTensorProduct.h
+++ b/unsupported/Eigen/src/KroneckerProduct/KroneckerTensorProduct.h
@@ -235,10 +235,10 @@ struct traits<KroneckerProductSparse<_Lhs,_Rhs> >
     MaxRowsAtCompileTime = size_at_compile_time<traits<Lhs>::MaxRowsAtCompileTime, traits<Rhs>::MaxRowsAtCompileTime>::ret,
     MaxColsAtCompileTime = size_at_compile_time<traits<Lhs>::MaxColsAtCompileTime, traits<Rhs>::MaxColsAtCompileTime>::ret,
 
-    EvalToRowMajor = (LhsFlags & RhsFlags & RowMajorBit),
+    EvalToRowMajor = (int(LhsFlags) & int(RhsFlags) & RowMajorBit),
     RemovedBits = ~(EvalToRowMajor ? 0 : RowMajorBit),
 
-    Flags = ((LhsFlags | RhsFlags) & HereditaryBits & RemovedBits)
+    Flags = ((int(LhsFlags) | int(RhsFlags)) & HereditaryBits & RemovedBits)
           | EvalBeforeNestingBit,
     CoeffReadCost = HugeCost
   };