clover: std::result_of is deprecated in c++17 and removed in c++20

Reviewed-by: Karol Herbst <kherbst@redhat.com>
Reviewed-by: Francisco Jerez <currojerez@riseup.net>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/12273>

src/gallium/frontends/clover/meson.build

@@ -148,6 +148,7 @@ clover_files = files(
   'util/adaptor.hpp',
   'util/algebra.hpp',
   'util/algorithm.hpp',
+  'util/compat.hpp',
   'util/factor.hpp',
   'util/functional.hpp',
   'util/lazy.hpp',

src/gallium/frontends/clover/util/adaptor.hpp

@@ -25,6 +25,7 @@
 
 #include <iterator>
 
+#include "util/compat.hpp"
 #include "util/tuple.hpp"
 #include "util/pointer.hpp"
 #include "util/functional.hpp"
@@ -43,8 +44,8 @@ namespace clover {
       class iterator_adaptor {
       public:
          typedef std::forward_iterator_tag iterator_category;
-         typedef typename std::result_of<
+         typedef typename invoke_result<
-               F(typename std::iterator_traits<Is>::reference...)
+               F, typename std::iterator_traits<Is>::reference...
             >::type reference;
          typedef typename std::remove_reference<reference>::type value_type;
          typedef pseudo_ptr<value_type> pointer;

src/gallium/frontends/clover/util/compat.hpp

@@ -0,0 +1,43 @@
+//
+// Copyright © Microsoft Corporation
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the "Software"),
+// to deal in the Software without restriction, including without limitation
+// the rights to use, copy, modify, merge, publish, distribute, sublicense,
+// and/or sell copies of the Software, and to permit persons to whom the
+// Software is furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
+// OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+// OTHER DEALINGS IN THE SOFTWARE.
+//
+
+#ifndef CLOVER_UTIL_COMPAT_HPP
+#define CLOVER_UTIL_COMPAT_HPP
+
+#include <type_traits>
+
+namespace clover {
+   template<typename F, typename... Args>
+   struct invoke_result {
+#if __cplusplus >= 201703L
+      typedef typename std::invoke_result<
+         F, Args...
+      >::type type;
+#else
+      typedef typename std::result_of<
+         F(Args...)
+      >::type type;
+#endif
+   };
+}
+
+#endif