From 5e80ca60bb7af7e6fd6c91c6d1840c7d75a7ccfc Mon Sep 17 00:00:00 2001
From: Laurent Rineau <laurent.rineau@cgal.org>
Date: Tue, 23 Sep 2025 21:37:55 +0200
Subject: [PATCH] fix when CGAL_CDT_3_CAN_USE_CXX20_FORMAT is false

---
 .../include/CGAL/Constrained_triangulation_3/internal/config.h  | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Constrained_triangulation_3/include/CGAL/Constrained_triangulation_3/internal/config.h b/Constrained_triangulation_3/include/CGAL/Constrained_triangulation_3/internal/config.h
index 99c39f2555b..47f53d42ac5 100644
--- a/Constrained_triangulation_3/include/CGAL/Constrained_triangulation_3/internal/config.h
+++ b/Constrained_triangulation_3/include/CGAL/Constrained_triangulation_3/internal/config.h
@@ -48,7 +48,7 @@ decltype(auto) cdt_3_format(std::string_view fmt, const Args&... args) {
 
 template <typename... Args>
 constexpr decltype(auto) cdt_3_format(Args&&...) {
-  return "";
+  return std::string{};
 }
 
 constexpr bool cdt_3_can_use_cxx20_format() {