From d0bded5988198abbaf3974bdedd30a6cb48c0562 Mon Sep 17 00:00:00 2001
From: Brainy0207 <80522992+Brainy0207@users.noreply.github.com>
Date: Mon, 15 Mar 2021 16:17:28 +0100
Subject: [PATCH] Fix MSVC /clr builds (#2179)

---
 include/fmt/format.h | 16 ++++++++++------
 1 file changed, 10 insertions(+), 6 deletions(-)

diff --git a/include/fmt/format.h b/include/fmt/format.h
index 06f85a7c..1a76ebd4 100644
--- a/include/fmt/format.h
+++ b/include/fmt/format.h
@@ -204,17 +204,18 @@ FMT_END_NAMESPACE
 // __builtin_clz and __builtin_clzll, so only define FMT_BUILTIN_CLZ using the
 // MSVC intrinsics if the clz and clzll builtins are not available.
 #if FMT_MSC_VER && !defined(FMT_BUILTIN_CLZLL) && \
-    !defined(FMT_BUILTIN_CTZLL) && !defined(_MANAGED)
+    !defined(FMT_BUILTIN_CTZLL)
 FMT_BEGIN_NAMESPACE
 namespace detail {
 // Avoid Clang with Microsoft CodeGen's -Wunknown-pragmas warning.
-#  ifndef __clang__
+#  if !defined(__clang__)
+#    pragma managed(push, off)
 #    pragma intrinsic(_BitScanForward)
 #    pragma intrinsic(_BitScanReverse)
-#  endif
-#  if defined(_WIN64) && !defined(__clang__)
-#    pragma intrinsic(_BitScanForward64)
-#    pragma intrinsic(_BitScanReverse64)
+#    if defined(_WIN64)
+#      pragma intrinsic(_BitScanForward64)
+#      pragma intrinsic(_BitScanReverse64)
+#    endif
 #  endif
 
 inline int clz(uint32_t x) {
@@ -270,6 +271,9 @@ inline int ctzll(uint64_t x) {
   return static_cast<int>(r);
 }
 #  define FMT_BUILTIN_CTZLL(n) detail::ctzll(n)
+#  if !defined(__clang__)
+#    pragma managed(pop)
+#  endif
 }  // namespace detail
 FMT_END_NAMESPACE
 #endif