From 9df21dc8b4b576a7aa5c0094daa8d7e8b8be60f0 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Antonio=20S=C3=A1nchez?= <cantonios@google.com>
Date: Fri, 15 Mar 2024 18:07:02 +0000
Subject: [PATCH] Work around VS2015 compile bug.

---
 Eigen/src/Core/Ref.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/Eigen/src/Core/Ref.h b/Eigen/src/Core/Ref.h
index c2a37eadb..07da15550 100644
--- a/Eigen/src/Core/Ref.h
+++ b/Eigen/src/Core/Ref.h
@@ -312,8 +312,8 @@ template<typename PlainObjectType, int Options, typename StrideType> class Ref
     inline Ref(DenseBase<Derived>& expr)
     #endif
     {
-      EIGEN_STATIC_ASSERT(bool(internal::is_lvalue<Derived>::value), THIS_EXPRESSION_IS_NOT_A_LVALUE__IT_IS_READ_ONLY);
-      EIGEN_STATIC_ASSERT(bool(Traits::template match<Derived>::MatchAtCompileTime), STORAGE_LAYOUT_DOES_NOT_MATCH);
+      EIGEN_STATIC_ASSERT((static_cast<bool>(internal::is_lvalue<Derived>::value)), THIS_EXPRESSION_IS_NOT_A_LVALUE__IT_IS_READ_ONLY);
+      EIGEN_STATIC_ASSERT((static_cast<bool>(Traits::template match<Derived>::MatchAtCompileTime)), STORAGE_LAYOUT_DOES_NOT_MATCH);
       EIGEN_STATIC_ASSERT(!Derived::IsPlainObjectBase,THIS_EXPRESSION_IS_NOT_A_LVALUE__IT_IS_READ_ONLY);
       // Construction must pass since we will not create temporary storage in the non-const case.
       const bool success = Base::construct(expr.const_cast_derived());