https://bugs.gentoo.org/933417
https://gitlab.com/mbunkus/mkvtoolnix/-/issues/3695
https://gitlab.com/mbunkus/mkvtoolnix/-/commit/7e1bea9527616ab6ab38425e7290579f05dd9bb1

From 7e1bea9527616ab6ab38425e7290579f05dd9bb1 Mon Sep 17 00:00:00 2001
From: Moritz Bunkus <mo@bunkus.online>
Date: Tue, 30 Apr 2024 16:05:35 +0200
Subject: [PATCH] replace removed `std::result_of` with `std::invoke_result`

`std::result_of` was deprecated in C++17 & removed in C++20. A lot of
compilers still make it available even when running in C++20 mode,
while others don't.

Therefore replace it with equivalent use of `std::invoke_result`.

Fixes #3695.
--- a/NEWS.md
+++ b/NEWS.md
@@ -1,3 +1,11 @@
+# Version ?
+
+## Bug fixes
+
+* fixed compilation of `src/common/sorting.h` with certain compilers due to
+  the deprecation & removal of `std::result_of<>` in C++20. Fixes #3695.
+
+
 # Version 84.0 "Sleeper" 2024-04-28
 
 ## New features and enhancements
--- a/src/common/sorting.h
+++ b/src/common/sorting.h
@@ -27,7 +27,7 @@ namespace mtx::sort {
 
 template<  typename Titer
          , typename Tcriterion_maker
-         , typename Tcriterion = typename std::result_of< Tcriterion_maker(typename std::iterator_traits<Titer>::value_type) >::type
+         , typename Tcriterion = typename std::invoke_result< Tcriterion_maker, typename std::iterator_traits<Titer>::value_type >::type
          , typename Tcomparator = std::less<Tcriterion>
          >
 void
-- 
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