3 files changed, 44 insertions, 6 deletions
diff --git a/gdbsupport/function-view.h b/gdbsupport/function-view.h
index 9f8a868..cc2cdc3 100644
--- a/gdbsupport/function-view.h
+++ b/gdbsupport/function-view.h
@@ -192,6 +192,7 @@
   You can find unit tests covering the whole API in
   unittests/function-view-selftests.c.  */
 
+#include "invoke-result.h"
 namespace gdb {
 
 namespace fv_detail {
@@ -229,7 +230,7 @@ class function_view<Res (Args...)>
   /* True if Func can be called with Args, and either the result is
      Res, convertible to Res or Res is void.  */
   template<typename Callable,
-	   typename Res2 = typename std::result_of<Callable &(Args...)>::type>
+	   typename Res2 = typename gdb::invoke_result<Callable &, Args...>::type>
   struct IsCompatibleCallable : CompatibleReturnType<Res2, Res>
   {};
 
diff --git a/gdbsupport/invoke-result.h b/gdbsupport/invoke-result.h
new file mode 100644
index 0000000..5d5ffa0
--- /dev/null
+++ b/gdbsupport/invoke-result.h
@@ -0,0 +1,37 @@
+/* Compatibility wrapper around std::result_of and std::invoke_result.
+
+   Copyright (C) 2022 Free Software Foundation, Inc.
+
+   This file is part of GDB.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+#ifndef GDBSUPPORT_INVOKE_RESULT_H
+#define GDBSUPPORT_INVOKE_RESULT_H
+
+#include <type_traits>
+
+namespace gdb
+{
+#if __cplusplus >= 201703L
+template<typename Callable, class... Args>
+using invoke_result = std::invoke_result<Callable, Args...>;
+#else
+template<typename Callable, typename... Args>
+using invoke_result = std::result_of<Callable (Args...)>;
+#endif
+
+} /* namespace gdb */
+
+#endif /* GDBSUPPORT_INVOKE_RESULT_H */
diff --git a/gdbsupport/parallel-for.h b/gdbsupport/parallel-for.h
index 4cd1dbf..acd9137 100644
--- a/gdbsupport/parallel-for.h
+++ b/gdbsupport/parallel-for.h
@@ -22,6 +22,7 @@
 
 #include <algorithm>
 #include <type_traits>
+#include "gdbsupport/invoke-result.h"
 #include "gdbsupport/thread-pool.h"
 #include "gdbsupport/function-view.h"
 
@@ -132,14 +133,14 @@ private:
 
 template<class RandomIt, class RangeFunction>
 typename gdb::detail::par_for_accumulator<
-    typename std::result_of<RangeFunction (RandomIt, RandomIt)>::type
+    typename gdb::invoke_result<RangeFunction, RandomIt, RandomIt>::type
   >::result_type
 parallel_for_each (unsigned n, RandomIt first, RandomIt last,
 		   RangeFunction callback,
 		   gdb::function_view<size_t(RandomIt)> task_size = nullptr)
 {
   using result_type
-    = typename std::result_of<RangeFunction (RandomIt, RandomIt)>::type;
+    = typename gdb::invoke_result<RangeFunction, RandomIt, RandomIt>::type;
 
   /* If enabled, print debug info about how the work is distributed across
      the threads.  */
@@ -276,14 +277,13 @@ parallel_for_each (unsigned n, RandomIt first, RandomIt last,
 
 template<class RandomIt, class RangeFunction>
 typename gdb::detail::par_for_accumulator<
-    typename std::result_of<RangeFunction (RandomIt, RandomIt)>::type
+    typename gdb::invoke_result<RangeFunction, RandomIt, RandomIt>::type
   >::result_type
 sequential_for_each (unsigned n, RandomIt first, RandomIt last,
 		     RangeFunction callback,
 		     gdb::function_view<size_t(RandomIt)> task_size = nullptr)
 {
-  using result_type
-    = typename std::result_of<RangeFunction (RandomIt, RandomIt)>::type;
+  using result_type = typename gdb::invoke_result<RangeFunction, RandomIt, RandomIt>::type;
 
   gdb::detail::par_for_accumulator<result_type> results (0);