PySide6: Fix QObject.property() for QFlag types

QObject::property() returns a QVariant for whose type a shiboken
converter is retrieved by name (QVariant::typeName()). This fails for
QFlags types since QVariant::typeName() returns the fully expanded
name QFlag<Enum>. Register the flags converter under that name, too,
to fix this.

Pick-to: 6.2
Fixes: PYSIDE-1673
Change-Id: I23e83da34b82196d76b78fa44f67647da65737c8
Reviewed-by: Christian Tismer <tismer@stackless.com>

1 files changed, 8 insertions, 0 deletions

diff --git a/sources/shiboken6/generator/shiboken/cppgenerator.cpp b/sources/shiboken6/generator/shiboken/cppgenerator.cpp
index 5db3d82e3..4af72beda 100644
--- a/sources/shiboken6/generator/shiboken/cppgenerator.cpp
+++ b/sources/shiboken6/generator/shiboken/cppgenerator.cpp
@@ -4108,6 +4108,14 @@ void CppGenerator::writeEnumConverterInitialization(TextStream &s, const TypeEnt
             else
                 break;
         }
+        if (flags) {
+            // PYSIDE-1673: Also register "QFlags<Class::Option>" purely for
+            // the purpose of finding the converter by QVariant::typeName()
+            // in the QVariant conversion code.
+            s << "Shiboken::Conversions::registerConverterName(converter, \""
+                << flags->name() << "\");\n";
+        }
+
     }
     s << "}\n";