[Qt6] mod QRegExp to QRegularExpression

note ad Core5Compat to Cmake

sources/ElementsCollection/elementslocation.cpp

@@ -773,8 +773,27 @@ bool ElementsLocation::setXml(const QDomDocument &xml_document) const
 #else
 #if TODO_LIST
 #pragma message("@TODO remove code for QT 6 or later")
+#		pragma message("@TODO ad Core5Compat to Cmake")
 #endif
 			qDebug() << "Help code for QT 6 or later";
+
+			QString			   path_ = collectionPath(false);
+			QRegularExpression rx("^(.*)/(.*\\.elmt)$");
+
+			if (rx.exactMatch(path_))
+			{
+				return project()
+					->embeddedElementCollection()
+					->addElementDefinition(
+						rx.cap(1),
+						rx.cap(2),
+						xml_document.documentElement());
+			}
+			else
+			{
+				qDebug() << "ElementsLocation::setXml :"
+							" rx don't match";
+			}
 #endif
 		}
 	}