Add support for __repr__ in QObject derived classes

Currently shiboken generates classes without __repr__ for QObject
derived classes. However for all non-QObject classes that have an
operator<<() for QDebug, it *does* add a valid repr implementation.
Extend this behavior to QObject classes as well.

In order for this to become more useful, also check for the indirection
of operator<<(): If operator<<(QDebug, Foo*) is available, use the
current non-value-type behavior, (i.e. provide cppSelf to operator<<()),
but if operator<<(QDebug, const Foo&) is available instead, use the same
behavior as for value-types, i.e. provide *cppSelf.

This greatly increases the number of classes where operator<<() provides
useful results.

Also make sure to check for operator<<() in namespaces (recursively),
not just at global scope.

Change-Id: Ief9158455a25e332f07169f09692cafb8097078b
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>

1 files changed, 22 insertions, 0 deletions

diff --git a/sources/pyside2/tests/pysidetest/testobject.cpp b/sources/pyside2/tests/pysidetest/testobject.cpp
index 03a7a965c..441ae872f 100644
--- a/sources/pyside2/tests/pysidetest/testobject.cpp
+++ b/sources/pyside2/tests/pysidetest/testobject.cpp
@@ -52,3 +52,25 @@ void TestObject::emitSignalWithTypedefValue(int value)
 {
     emit signalWithTypedefValue(TypedefValue(value));
 }
+
+QDebug operator<<(QDebug dbg, TestObject& testObject)
+{
+    QDebugStateSaver saver(dbg);
+    dbg.nospace() << "TestObject(id=" << testObject.idValue() << ") ";
+    return dbg;
+}
+
+namespace PySideCPP {
+    QDebug operator<<(QDebug dbg, TestObjectWithNamespace& testObject)
+    {
+        QDebugStateSaver saver(dbg);
+        dbg.nospace() << "TestObjectWithNamespace(" << testObject.name() << ") ";
+        return dbg;
+    }
+    QDebug operator<<(QDebug dbg, TestObject2WithNamespace& testObject)
+    {
+        QDebugStateSaver saver(dbg);
+        dbg.nospace() << "TestObject2WithNamespace(" << testObject.name() << ") ";
+        return dbg;
+    }
+}