From 2d445775865d8ef5b62e7d526657e1b6efae41e8 Mon Sep 17 00:00:00 2001
From: Victor Zverovich <viz@fb.com>
Date: Sat, 18 Dec 2021 08:51:21 -0800
Subject: [PATCH] Try fixing byte regression

---
 include/fmt/core.h | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/include/fmt/core.h b/include/fmt/core.h
index 696b8676..5acd9923 100644
--- a/include/fmt/core.h
+++ b/include/fmt/core.h
@@ -1415,17 +1415,20 @@ template <typename Context> struct arg_mapper {
   }
 
   template <typename T,
-            FMT_ENABLE_IF(std::is_enum<T>::value &&
-                          (std::is_convertible<T, int>::value ||
-                           std::is_same<T, detail::byte>::value) &&
-                          !has_formatter<T, Context>::value &&
-                          !has_fallback_formatter<T, char_type>::value)>
+            FMT_ENABLE_IF(
+                std::is_enum<T>::value&& std::is_convertible<T, int>::value &&
+                !has_formatter<T, Context>::value &&
+                !has_fallback_formatter<T, char_type>::value)>
   FMT_CONSTEXPR FMT_INLINE auto map(const T& val)
       -> decltype(std::declval<arg_mapper>().map(
           static_cast<typename std::underlying_type<T>::type>(val))) {
     return map(static_cast<typename std::underlying_type<T>::type>(val));
   }
 
+  FMT_CONSTEXPR FMT_INLINE auto map(detail::byte val) -> unsigned char {
+    return map(static_cast<unsigned char>(val));
+  }
+
   template <typename T, typename U = remove_cvref_t<T>>
   struct formattable
       : bool_constant<has_const_formatter<U, Context>() ||