From 87279a1299ca6d0b718b3008dda0c97d32dbb531 Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sat, 19 Nov 2022 22:37:49 +0800
Subject: [PATCH] =?UTF-8?q?fix:=20=E2=80=98u=E2=80=99=20was=20not=20declar?=
 =?UTF-8?q?ed=20in=20this=20scope?=
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---
 include/libimp/log.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/include/libimp/log.h b/include/libimp/log.h
index f0549a2..df6bc1b 100644
--- a/include/libimp/log.h
+++ b/include/libimp/log.h
@@ -53,10 +53,10 @@ template <typename T>
 class has_fn_output {
   static std::integral_constant<out_type, out_none> check(...);
 
-  template <typename U, typename = decltype(u->output(log::level::trace, std::declval<std::string>()))>
+  template <typename U, typename = decltype(std::declval<U &>().output(log::level::trace, std::declval<std::string>()))>
   static std::integral_constant<out_type, out_string> check(U *u);
 
-  template <typename U, typename = decltype(u->output(std::declval<log::context>()))>
+  template <typename U, typename = decltype(std::declval<U &>().output(std::declval<log::context>()))>
   static std::integral_constant<out_type, out_context> check(U *u);
 
 public: