From 285a05d6ea5409aa16848bc18ab6419cb82f3c6a Mon Sep 17 00:00:00 2001
From: Kefu Chai <kchai@redhat.com>
Date: Wed, 9 Sep 2020 20:59:30 +0800
Subject: [PATCH] crimson/common: s/result_of/invoke_result/

std::result_of is deprecated in C++17, and removed in C++20, so let's
use std::invoke_result instead

Signed-off-by: Kefu Chai <kchai@redhat.com>
---
 src/crimson/common/errorator.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/crimson/common/errorator.h b/src/crimson/common/errorator.h
index 306c3cc6d0a..450227d7806 100644
--- a/src/crimson/common/errorator.h
+++ b/src/crimson/common/errorator.h
@@ -15,7 +15,7 @@ namespace crimson {
 template<typename Iterator, typename AsyncAction>
 inline auto do_for_each(Iterator begin, Iterator end, AsyncAction action) {
   using futurator = \
-    ::seastar::futurize<std::result_of_t<AsyncAction(decltype(*begin))>>;
+    ::seastar::futurize<std::invoke_result_t<AsyncAction, decltype(*begin)>>;
 
   if (begin == end) {
     return futurator::type::errorator_type::template make_ready_future<>();
-- 
2.39.5