Automatically register data/debug stream operations in QMetaType

And remove the old manual registration code for those operators.

Add some special handling for long/ulong, as these types could be
streamed as a QVariant so far, but are not directly streamable
through QDataStream.

[ChangeLog][QtCore][QMetaType] The QMetaType::registerStreamOperators()
and QMetaType::registerDebugStreamOperator() methods have been
removed. The streaming operators for a type are now automatically
registered together with the type registration.  This implies that the
operators should be visible wherever the type is visible and being used.

[ChangeLog][Behavior Incompatible Changes] Because the QDataStream and
QDebug serialization operators are automatically registered with
QMetaType, the declarations of those functions must be present at any
point where the type is used with QMetaType and QVariant.

Change-Id: I4a0732651b20319af4a8397ff90b848ca4580d99
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>

1 files changed, 1 insertions, 7 deletions

diff --git a/tests/auto/corelib/kernel/qvariant/tst_qvariant.cpp b/tests/auto/corelib/kernel/qvariant/tst_qvariant.cpp
index aeac08fc34..02a537a9d6 100644
--- a/tests/auto/corelib/kernel/qvariant/tst_qvariant.cpp
+++ b/tests/auto/corelib/kernel/qvariant/tst_qvariant.cpp
@@ -1222,7 +1222,6 @@ struct CustomStreamableClass
         return i == other.i;
     }
 };
-Q_DECLARE_METATYPE(CustomStreamableClass);
 
 QDataStream &operator<<(QDataStream &out, const CustomStreamableClass &myObj)
 {
@@ -1233,11 +1232,10 @@ QDataStream &operator>>(QDataStream &in, CustomStreamableClass &myObj)
 {
     return in >> myObj.i;
 }
+Q_DECLARE_METATYPE(CustomStreamableClass);
 
 void tst_QVariant::writeToReadFromDataStream_data()
 {
-    qRegisterMetaTypeStreamOperators<CustomStreamableClass>();
-
     QTest::addColumn<QVariant>("writeVariant");
     QTest::addColumn<bool>("isNull");
     {
@@ -2184,8 +2182,6 @@ void tst_QVariant::saveLoadCustomTypes()
     auto tp = QMetaType::fromType<Blah>();
     QVariant v = QVariant(tp, &i);
 
-    qRegisterMetaTypeStreamOperators<Blah>("Blah");
-
     QCOMPARE(v.userType(), tp.id());
     QCOMPARE(v.type(), QVariant::UserType);
     {
@@ -4639,8 +4635,6 @@ void tst_QVariant::fromStdVariant()
 
 void tst_QVariant::qt4UuidDataStream()
 {
-    qRegisterMetaTypeStreamOperators<QUuid>();
-
     QByteArray data;
     QDataStream stream(&data, QIODevice::WriteOnly);
     stream.setVersion(QDataStream::Qt_4_8);