Fix a set of compilation errors against Qt6

Fixes include
-qmllistproperty uses qsizetype instead of int
-implicit constructor calls that Qt6 marks as explicit
-QEnableIf removed => std::enable_if
-Replace the removed QCoreApplicationPrivate::cloneEvent()
-Conflicting forward declaration for QStringList (comes via qglobal.h)

N.B. after this task the generated (by generator.cpp) code won’t still
compile, and it likely requires more in-depth study how to fix it
=> looks like they relate to the Qt6 property system changes. By
temporarily disabling the violating generated code all unit tests pass
though => needs a followup task to analyze and fix.

Task-number: QTBUG-89832
Change-Id: I9f7d1cd5898b549f243a7df464ca124d29074c46
Reviewed-by: Ulf Hermann <ulf.hermann@qt.io>
Reviewed-by: Karsten Heimrich <karsten.heimrich@qt.io>

1 files changed, 3 insertions, 3 deletions

diff --git a/src/imports/statemachine/childrenprivate.h b/src/imports/statemachine/childrenprivate.h
index 2dcecd6..8eab308 100644
--- a/src/imports/statemachine/childrenprivate.h
+++ b/src/imports/statemachine/childrenprivate.h
@@ -141,12 +141,12 @@ public:
         emit parentObject<T>(prop)->childrenChanged();
     }
 
-    static int count(QQmlListProperty<QObject> *prop)
+    static qsizetype count(QQmlListProperty<QObject> *prop)
     {
         return static_cast<Self *>(prop->data)->children.count();
     }
 
-    static QObject *at(QQmlListProperty<QObject> *prop, int index)
+    static QObject *at(QQmlListProperty<QObject> *prop, qsizetype index)
     {
         return static_cast<Self *>(prop->data)->children.at(index);
     }
@@ -161,7 +161,7 @@ public:
         emit parentObject<T>(prop)->childrenChanged();
     }
 
-    static void replace(QQmlListProperty<QObject> *prop, int index, QObject *item)
+    static void replace(QQmlListProperty<QObject> *prop, qsizetype index, QObject *item)
     {
         auto &children = static_cast<Self *>(prop->data)->children;