Remove preemptive type conversion, allowing empty ports from Groot

see BehaviorTree#854 for
more

Author: kd-ufr

src/xml_parsing.cpp

@@ -703,28 +703,6 @@ TreeNode::Ptr XMLParser::PImpl::createNodeFromXML(const XMLElement* element,
                                     ") but not in the providedPorts() of its "
                                     "registered node type."));
         }
-        else
-        {
-          const auto& port_model = port_model_it->second;
-          bool is_blacbkboard = port_value.size() >= 3 && port_value.front() == '{' &&
-                                port_value.back() == '}';
-          // let's test already if conversion is possible
-          if(!is_blacbkboard && port_model.converter() && port_model.isStronglyTyped())
-          {
-            // This may throw
-            try
-            {
-              port_model.converter()(port_value);
-            }
-            catch(std::exception& ex)
-            {
-              auto msg = StrCat("The port with name \"", port_name, "\" and value \"",
-                                port_value, "\" can not be converted to ",
-                                port_model.typeName());
-              throw LogicError(msg);
-            }
-          }
-        }
       }
 
       port_remap[port_name] = port_value;