From 55727e3b2146fa84cb351575b05d544b399743cd Mon Sep 17 00:00:00 2001
From: Victor Zverovich <viz@fb.com>
Date: Mon, 4 Jul 2022 08:25:27 -0700
Subject: [PATCH] More compile-time checks

---
 include/fmt/xchar.h | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/include/fmt/xchar.h b/include/fmt/xchar.h
index ac0f1832..2865b76e 100644
--- a/include/fmt/xchar.h
+++ b/include/fmt/xchar.h
@@ -82,6 +82,16 @@ auto vformat(basic_string_view<Char> format_str,
   return to_string(buffer);
 }
 
+#if !FMT_GCC_VERSION || FMT_GCC_VERSION >= 409
+template <typename... Args>
+using wformat_string = basic_format_string<wchar_t, type_identity_t<Args>...>;
+#endif
+
+template <typename... T>
+auto format(wformat_string<T...> fmt, T&&... args) -> std::wstring {
+  return vformat(fmt, fmt::make_wformat_args(args...));
+}
+
 // Pass char_t as a default template parameter instead of using
 // std::basic_string<char_t<S>> to reduce the symbol size.
 template <typename S, typename... Args, typename Char = char_t<S>,