From 66f12df03b33a3ea32c82b0d0af7c303cf17d50e Mon Sep 17 00:00:00 2001
From: Aaron Gokaslan <aaronGokaslan@gmail.com>
Date: Mon, 27 Mar 2023 10:59:56 -0400
Subject: [PATCH] chore: make #4587 use proper cpp17 feature macro (#4592)

---
 include/pybind11/detail/descr.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/pybind11/detail/descr.h b/include/pybind11/detail/descr.h
index 85259d488..635614b0d 100644
--- a/include/pybind11/detail/descr.h
+++ b/include/pybind11/detail/descr.h
@@ -143,7 +143,7 @@ constexpr descr<N, Ts...> concat(const descr<N, Ts...> &descr) {
     return descr;
 }
 
-#if defined(PYBIND11_CPP17)
+#ifdef __cpp_fold_expressions
 template <size_t N1, size_t N2, typename... Ts1, typename... Ts2>
 constexpr descr<N1 + N2 + 2, Ts1..., Ts2...> operator,(const descr<N1, Ts1...> &a,
                                                        const descr<N2, Ts2...> &b) {