From 157756130a154b8b819090fa16bb7f7f3bd5211f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Antonio=20S=C3=A1nchez?= <cantonios@google.com>
Date: Fri, 15 Mar 2024 17:55:04 +0000
Subject: [PATCH] Restore C++03 compatibility.

---
 Eigen/src/Geometry/Transform.h | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/Eigen/src/Geometry/Transform.h b/Eigen/src/Geometry/Transform.h
index cd9b4f33d..a7756bebe 100644
--- a/Eigen/src/Geometry/Transform.h
+++ b/Eigen/src/Geometry/Transform.h
@@ -985,8 +985,10 @@ Transform<Scalar,Dim,Mode,Options>::preshear(const Scalar& sx, const Scalar& sy)
 {
   EIGEN_STATIC_ASSERT(int(Dim)==2, YOU_MADE_A_PROGRAMMING_MISTAKE)
   EIGEN_STATIC_ASSERT(Mode!=int(Isometry), THIS_METHOD_IS_ONLY_FOR_SPECIFIC_TRANSFORMATIONS)
-  m_matrix.template block<Dim, HDim>(0, 0) =
-      LinearMatrixType({{1, sy}, {sx, 1}}) * m_matrix.template block<Dim, HDim>(0, 0);
+  LinearMatrixType shear = LinearMatrixType::Identity(2, 2);
+  shear.coeffRef(0, 1) = sy;
+  shear.coeffRef(1, 0) = sx;
+  m_matrix.template block<Dim, HDim>(0, 0) = shear * m_matrix.template block<Dim, HDim>(0, 0);
   return *this;
 }