[C++/CLI] Type conversion for rosparams in ROS 1

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Note: I'm not using launch files (I should, but I'm not)

$ rosrun pkg node _param_name:=45

Clearly, param_name is integer as per the rules and 45.0 would make it a double. But

$ rosrun pkg node _param_name:='56'

Here, param_name is still an integer instead of a string. Using '"56"' or "'56'" obviously converts it to string. The same is observed when I use the following

rosparam set node/param_name VALUE

How can I

• Either set a numerical parameter as string from CLI
• OR manage to store the parameter into a string from C++ (because it is a string most of the time, it being a number is a special corner case)

It'd be great if there's a method without resorting to

if(!nodeHandle.getParam(param_name, str)){if(nodeHandle.getParam(param_name, num)) str=std::to_string(num);}
if(str.size()) { do smthg }

OR

if(nodeHandle.getParam(param_name, XmlRpcValue)) { do smthg }

As a starting point, I think the issue is automatic conversion for XML RPC because the TypeString is checked in ros::param::getImpl where the error is initiated.