From 39d2a8da2b2f2b1342861bf7f9a8d0f9634f654d Mon Sep 17 00:00:00 2001
From: darklukee <no-reply@hidden>
Date: Wed, 21 Oct 2020 09:45:41 +0200
Subject: [PATCH] Add option to force usage of inline namespaces

Detection of inline namespaces is imperfect as some compilers
don't provide __has_feature

This option allows to override it if needed.
---
 include/fmt/core.h | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/include/fmt/core.h b/include/fmt/core.h
index 2d657a8d..948b3d21 100644
--- a/include/fmt/core.h
+++ b/include/fmt/core.h
@@ -178,9 +178,17 @@
 #  endif
 #endif
 
-#ifndef FMT_BEGIN_NAMESPACE
+#ifndef FMT_USE_INLINE_NAMESPACES
 #  if FMT_HAS_FEATURE(cxx_inline_namespaces) || FMT_GCC_VERSION >= 404 || \
       (FMT_MSC_VER >= 1900 && !_MANAGED)
+#    define FMT_USE_INLINE_NAMESPACES 1
+#  else
+#    define FMT_USE_INLINE_NAMESPACES 0
+#  endif
+#endif
+
+#ifndef FMT_BEGIN_NAMESPACE
+#  if FMT_USE_INLINE_NAMESPACES
 #    define FMT_INLINE_NAMESPACE inline namespace
 #    define FMT_END_NAMESPACE \
       }                       \