From 3cd06a3d40cd9054cbc997fe6e28c5a472b93b8c Mon Sep 17 00:00:00 2001
From: gabime <gmelman1@gmail.com>
Date: Tue, 4 Jul 2023 16:04:49 +0300
Subject: [PATCH] Added const qualifier to stopwatch formatter to support c++20

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

diff --git a/include/spdlog/stopwatch.h b/include/spdlog/stopwatch.h
index 5d1f2dc5..bea7b8a7 100644
--- a/include/spdlog/stopwatch.h
+++ b/include/spdlog/stopwatch.h
@@ -61,7 +61,7 @@ template<>
 struct formatter<spdlog::stopwatch> : formatter<double>
 {
     template<typename FormatContext>
-    auto format(const spdlog::stopwatch &sw, FormatContext &ctx) -> decltype(ctx.out())
+    auto format(const spdlog::stopwatch &sw, FormatContext &ctx) const -> decltype(ctx.out())
     {
         return formatter<double>::format(sw.elapsed().count(), ctx);
     }