From 7cd713071ebc5dfc052028ddccbb78f19bdfb79c Mon Sep 17 00:00:00 2001
From: Nebojsa Cvetkovic <nebkat@gmail.com>
Date: Mon, 1 Jul 2024 17:53:53 +0100
Subject: [PATCH] fix: Make basic_format_arg::visit() const

---
 include/fmt/base.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/fmt/base.h b/include/fmt/base.h
index 976402a42b66..783e03687d7e 100644
--- a/include/fmt/base.h
+++ b/include/fmt/base.h
@@ -1760,7 +1760,7 @@ template <typename Context> class basic_format_arg {
    * `vis(value)` will be called with the value of type `double`.
    */
   template <typename Visitor>
-  FMT_CONSTEXPR auto visit(Visitor&& vis) -> decltype(vis(0)) {
+  FMT_CONSTEXPR auto visit(Visitor&& vis) const -> decltype(vis(0)) {
     switch (type_) {
     case detail::type::none_type:
       break;