From 90325d0970b031be8872c60168aeb4cb09928815 Mon Sep 17 00:00:00 2001
From: Victor Zverovich <viz@fb.com>
Date: Sat, 5 Feb 2022 10:41:18 -0800
Subject: [PATCH] Fix stored type detection

---
 include/fmt/args.h | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/include/fmt/args.h b/include/fmt/args.h
index 9a8e4ed2cebb..a3966d140719 100644
--- a/include/fmt/args.h
+++ b/include/fmt/args.h
@@ -95,10 +95,10 @@ class dynamic_format_arg_store
   };
 
   template <typename T>
-  using stored_type = conditional_t<detail::is_string<T>::value &&
-                                        !has_formatter<T, Context>::value &&
-                                        !detail::is_reference_wrapper<T>::value,
-                                    std::basic_string<char_type>, T>;
+  using stored_type = conditional_t<
+      std::is_convertible<T, std::basic_string<char_type>>::value &&
+          !detail::is_reference_wrapper<T>::value,
+      std::basic_string<char_type>, T>;
 
   // Storage of basic_format_arg must be contiguous.
   std::vector<basic_format_arg<Context>> data_;