From 571a9b7b266a6ec6aa4c3da620b23f1d232f8cfa Mon Sep 17 00:00:00 2001
From: Chloe <25387744+qimiko@users.noreply.github.com>
Date: Sat, 16 Sep 2023 08:07:03 -0700
Subject: [PATCH] Replace usage of C++17 library feature with C++11 (#3638)

---
 include/fmt/core.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/include/fmt/core.h b/include/fmt/core.h
index 77c2d240..153b7aab 100644
--- a/include/fmt/core.h
+++ b/include/fmt/core.h
@@ -2543,8 +2543,8 @@ FMT_CONSTEXPR auto parse_format_specs(ParseContext& ctx)
       decltype(arg_mapper<context>().map(std::declval<const T&>())),
       typename strip_named_arg<T>::type>;
 #if defined(__cpp_if_constexpr)
-  if constexpr (std::is_default_constructible_v<
-                    formatter<mapped_type, char_type>>) {
+  if constexpr (std::is_default_constructible<
+                    formatter<mapped_type, char_type>>::value) {
     return formatter<mapped_type, char_type>().parse(ctx);
   } else {
     type_is_unformattable_for<T, char_type> _;