From d88bc826faa966223580c7ab4a83e5a467fc173b Mon Sep 17 00:00:00 2001
From: Deniz Evrenci <denizevrenci@gmail.com>
Date: Tue, 3 Dec 2019 20:00:35 +0900
Subject: [PATCH] Fix handling of types that are explicitly convertible to
 std::string_view

---
 include/fmt/core.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/include/fmt/core.h b/include/fmt/core.h
index e766b3a99550..348131c3e80c 100644
--- a/include/fmt/core.h
+++ b/include/fmt/core.h
@@ -913,6 +913,8 @@ template <typename Context> struct arg_mapper {
   }
   template <typename T,
             FMT_ENABLE_IF(!is_string<T>::value && !is_char<T>::value &&
+                          !std::is_constructible<std_string_view<char_type>,
+                                                 T>::value &&
                           !std::is_constructible<basic_string_view<char_type>,
                                                  T>::value &&
                           (has_formatter<T, Context>::value ||