QMetaType: fix void* parameters

Commit 3695b35dfc accounted for pointer to
other incomplete types, but pointer-to-void was missed. This caused an
inconsistency in the stored metatype for void*, which is a built-in type
(QMetaType::VoidStar) but no pointer was recorded.

The test in tst_moc hadn't been enabled because the functions in
questions weren't extracted by moc. That is fixed in this commit.

Change-Id: I6f936da6f6e84d649f70fffd1706f613517a75fb
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>

src/corelib/kernel/qmetatype.h

@@ -2547,9 +2547,9 @@ constexpr const QMetaTypeInterface *qTryMetaTypeInterfaceForType()
     using Ty = typename MetatypeDecay<T>::type;
     using Tz = qRemovePointerLike_t<Ty>;
 
-    if constexpr (std::is_void_v<Ty>) {
+    if constexpr (std::is_void_v<Tz>) {
         // early out to avoid expanding the rest of the templates
-        return &QMetaTypeInterfaceWrapper<void>::metaType;
+        return &QMetaTypeInterfaceWrapper<Ty>::metaType;
     } else if constexpr (ForceComplete::value) {
         checkTypeIsSuitableForMetaType<Ty>();
         return &QMetaTypeInterfaceWrapper<Ty>::metaType;

tests/auto/tools/moc/allmocs_baseline_in.json

@@ -1671,6 +1671,78 @@
                 "className": "TestPointeeCanBeIncomplete",
                 "object": true,
                 "qualifiedClassName": "TestPointeeCanBeIncomplete",
+                "slots": [
+                    {
+                        "access": "public",
+                        "arguments": [
+                            {
+                                "type": "QPointer<FwdClass>"
+                            }
+                        ],
+                        "name": "setProp1",
+                        "returnType": "void"
+                    },
+                    {
+                        "access": "public",
+                        "arguments": [
+                            {
+                                "type": "QSharedPointer<FwdClass>"
+                            }
+                        ],
+                        "name": "setProp2",
+                        "returnType": "void"
+                    },
+                    {
+                        "access": "public",
+                        "arguments": [
+                            {
+                                "type": "QWeakPointer<FwdClass>"
+                            }
+                        ],
+                        "name": "setProp3",
+                        "returnType": "void"
+                    },
+                    {
+                        "access": "public",
+                        "arguments": [
+                            {
+                                "type": "FwdClass*"
+                            }
+                        ],
+                        "name": "setProp4",
+                        "returnType": "void"
+                    },
+                    {
+                        "access": "public",
+                        "arguments": [
+                            {
+                                "type": "const FwdClass*"
+                            }
+                        ],
+                        "name": "setProp5",
+                        "returnType": "void"
+                    },
+                    {
+                        "access": "public",
+                        "arguments": [
+                            {
+                                "type": "void*"
+                            }
+                        ],
+                        "name": "setProp6",
+                        "returnType": "void"
+                    },
+                    {
+                        "access": "public",
+                        "arguments": [
+                            {
+                                "type": "const void*"
+                            }
+                        ],
+                        "name": "setProp7",
+                        "returnType": "void"
+                    }
+                ],
                 "superClasses": [
                     {
                         "access": "public",

tests/auto/tools/moc/pointery_to_incomplete.h

@@ -14,10 +14,14 @@ class FwdClass;
 class TestPointeeCanBeIncomplete : public QObject
 {
     Q_OBJECT
-public:
+public slots:
     void setProp1(QPointer<FwdClass>) {}
     void setProp2(QSharedPointer<FwdClass>) {}
     void setProp3(const QWeakPointer<FwdClass> &) {}
+    void setProp4(FwdClass *) {}
+    void setProp5(const FwdClass *) {}
+    void setProp6(void *) {}
+    void setProp7(const void *) {}
 };
 
 #endif // POINTERY_TO_INCOMPLETE_H