From 6fc328ce1d19ba1a3754367d66a2ea4ac9774bd1 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jean-Micha=C3=ABl=20Celerier?=
 <jeanmichael.celerier@gmail.com>
Date: Thu, 27 Jun 2024 12:40:26 +0200
Subject: [PATCH] wobjectimpl.h: update FunctorCall for Qt 6.8+

The "ApplyReturnValue" struct has been removed in https://github.com/qt/qtbase/commit/f894f04c9d03878116de61c11d4591da67c10378 ; this updates the code with the new pattern
---
 src/wobjectimpl.h | 54 ++++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 53 insertions(+), 1 deletion(-)

diff --git a/src/wobjectimpl.h b/src/wobjectimpl.h
index 5e32ff2..76c721b 100644
--- a/src/wobjectimpl.h
+++ b/src/wobjectimpl.h
@@ -1026,7 +1026,7 @@ inline auto propReset(F f, O *o) W_RETURN(((o->*f)(),0))
 template <typename... T>
 inline void propReset(T...) {}
 
-#if QT_VERSION >= QT_VERSION_CHECK(6,3,0)
+#if QT_VERSION >= QT_VERSION_CHECK(6,3,0) && QT_VERSION < QT_VERSION_CHECK(6, 8, 0)
 // note: Qt 6.3 introduced a check here that allows only QObjects - but we need it for Gadgets as well
 template <typename, typename, typename, typename> struct FunctorCall;
 template <size_t... II, typename... SignalArgs, typename R, typename Function>
@@ -1063,6 +1063,58 @@ struct FunctorCall<std::index_sequence<II...>, QtPrivate::List<SignalArgs...>, R
         (o->*f)((*reinterpret_cast<typename QtPrivate::RemoveRef<SignalArgs>::Type *>(arg[II+1]))...), QtPrivate::ApplyReturnValue<R>(arg[0]);
     }
 };
+#elif QT_VERSION >= QT_VERSION_CHECK(6, 8, 0)
+template <typename, typename, typename, typename> struct FunctorCall;
+template <size_t... II, typename... SignalArgs, typename R, typename Function>
+struct FunctorCall<std::index_sequence<II...>, QtPrivate::List<SignalArgs...>, R, Function> : QtPrivate::FunctorCallBase {
+  static void call(Function f, void **arg)
+  {
+    using namespace QtPrivate;
+    call_internal<R>(arg, [&] {
+      return f((*reinterpret_cast<typename RemoveRef<SignalArgs>::Type *>(arg[II+1]))...);
+    });
+  }
+};
+template <size_t... II, typename... SignalArgs, typename R, typename... SlotArgs, typename SlotRet, class Obj>
+struct FunctorCall<std::index_sequence<II...>, QtPrivate::List<SignalArgs...>, R, SlotRet (Obj::*)(SlotArgs...)> : QtPrivate::FunctorCallBase {
+  static void call(SlotRet (Obj::*f)(SlotArgs...), Obj *o, void **arg)
+  {
+    using namespace QtPrivate;
+    call_internal<R>(arg, [&] {
+      return (o->*f)((*reinterpret_cast<typename RemoveRef<SignalArgs>::Type *>(arg[II+1]))...);
+    });
+  }
+};
+template <size_t... II, typename... SignalArgs, typename R, typename... SlotArgs, typename SlotRet, class Obj>
+struct FunctorCall<std::index_sequence<II...>, QtPrivate::List<SignalArgs...>, R, SlotRet (Obj::*)(SlotArgs...) const> : QtPrivate::FunctorCallBase {
+  static void call(SlotRet (Obj::*f)(SlotArgs...) const, Obj *o, void **arg)
+  {
+    using namespace QtPrivate;
+    call_internal<R>(arg, [&] {
+      return (o->*f)((*reinterpret_cast<typename RemoveRef<SignalArgs>::Type *>(arg[II+1]))...);
+    });
+  }
+};
+template <size_t... II, typename... SignalArgs, typename R, typename... SlotArgs, typename SlotRet, class Obj>
+struct FunctorCall<std::index_sequence<II...>, QtPrivate::List<SignalArgs...>, R, SlotRet (Obj::*)(SlotArgs...) noexcept> : QtPrivate::FunctorCallBase {
+  static void call(SlotRet (Obj::*f)(SlotArgs...) noexcept, Obj *o, void **arg)
+  {
+    using namespace QtPrivate;
+    call_internal<R>(arg, [&]() noexcept {
+      return (o->*f)((*reinterpret_cast<typename RemoveRef<SignalArgs>::Type *>(arg[II+1]))...);
+    });
+  }
+};
+template <size_t... II, typename... SignalArgs, typename R, typename... SlotArgs, typename SlotRet, class Obj>
+struct FunctorCall<std::index_sequence<II...>, QtPrivate::List<SignalArgs...>, R, SlotRet (Obj::*)(SlotArgs...) const noexcept> : QtPrivate::FunctorCallBase {
+  static void call(SlotRet (Obj::*f)(SlotArgs...) const noexcept, Obj *o, void **arg)
+  {
+    using namespace QtPrivate;
+    call_internal<R>(arg, [&]() noexcept {
+      return (o->*f)((*reinterpret_cast<typename RemoveRef<SignalArgs>::Type *>(arg[II+1]))...);
+    });
+  }
+};
 #endif
 
 struct FriendHelper {