From df8b1c2bc8b516c52b01a32f040a6c6c94dd778e Mon Sep 17 00:00:00 2001
From: Kefu Chai <kchai@redhat.com>
Date: Sat, 10 Feb 2018 00:06:20 +0800
Subject: [PATCH] test/librados: s/invoke_result_t/result_of_t/

to workaround buggy libc++ implementation. see
https://cplusplus.github.io/LWG/issue2807 . we should switch to
invoke_result_t once issue2807 is fixed in the latest release of
libc++.

Signed-off-by: Kefu Chai <kchai@redhat.com>
---
 src/test/librados/lock.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/test/librados/lock.cc b/src/test/librados/lock.cc
index a95bca18688..65d3fcdf09f 100644
--- a/src/test/librados/lock.cc
+++ b/src/test/librados/lock.cc
@@ -21,7 +21,7 @@ typedef RadosTestECPP LibRadosLockECPP;
 
 
 template<class Rep, class Period, typename Func, typename... Args,
-         typename Return = std::invoke_result_t<Func, Args...>>
+         typename Return = std::result_of_t<Func&&(Args&&...)>>
 Return wait_until(const std::chrono::duration<Rep, Period>& rel_time,
                 const std::chrono::duration<Rep, Period>& step,
                 const Return& expected,
-- 
2.39.5