From 12aacc28360a665554c5939fedb2bbe772f0ecfb Mon Sep 17 00:00:00 2001
From: sunmy <7743179+sun_mengyue@user.noreply.gitee.com>
Date: Tue, 8 Jun 2021 08:50:17 +0800
Subject: [PATCH] add string length to avoid strlen call

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

diff --git a/include/fmt/chrono.h b/include/fmt/chrono.h
index 11b9999e..924bfaff 100644
--- a/include/fmt/chrono.h
+++ b/include/fmt/chrono.h
@@ -452,10 +452,10 @@ template <typename Char, typename Duration>
 struct formatter<std::chrono::time_point<std::chrono::system_clock, Duration>,
                  Char> : formatter<std::tm, Char> {
   FMT_CONSTEXPR FMT_INLINE void generate_defalut_spec(char) {
-    this->specs = "%Y-%m-%d %H:%M:%S";
+    this->specs = {"%Y-%m-%d %H:%M:%S", 17};
   }
   FMT_CONSTEXPR FMT_INLINE void generate_defalut_spec(wchar_t) {
-    this->specs = L"%Y-%m-%d %H:%M:%S";
+    this->specs = {L"%Y-%m-%d %H:%M:%S", 17};
   }
 
   template <typename ParseContext>