From 00549dc7ece6757fdd24d2b13282342fae993f56 Mon Sep 17 00:00:00 2001
From: Peter Thoman <petert@dps.uibk.ac.at>
Date: Thu, 21 Dec 2023 12:59:53 +0100
Subject: [PATCH] Work around vector friend operator accesses (MSVC)

---
 include/simsycl/sycl/vec.hh | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/include/simsycl/sycl/vec.hh b/include/simsycl/sycl/vec.hh
index d83c87d..1b2e4bd 100644
--- a/include/simsycl/sycl/vec.hh
+++ b/include/simsycl/sycl/vec.hh
@@ -428,6 +428,10 @@ class alignas(detail::vec_alignment_v<DataT, NumElements>) vec {
 
     constexpr static int num_storage_elems = NumElements == 3 ? 4 : NumElements;
 
+    // Workaround for friend templates in earlier MSVC versions; TODO: remove when we drop support for them
+#if defined(_MSC_VER)
+  public:
+#endif
     DataT m_elems[num_storage_elems]{};
 }; // namespace simsycl::sycl