dumping parameters from c++ node

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Hi all,

I have a simple question but I can't seem to find a nice solution.

My problem is the following:

I have a YAML file that stores some parameters. These parameters are loaded into the parameter server at execution time. For some reason I want to change some parameters and store them permanently in the YAML file.

That is, I retrieve a certain field of the parameter:

XmlRpc::XmlRpcValue param;
nh.getParam("param_name", param);
ROS_ASSERT(param.getType() == XmlRpc::XmlRpcValue::TypeStruct);
std::string field = static_cast<std::string>(param["field]);

and then, after modifying it, I'd like not only to set the new value in the parameter server but also to permanently store this change.

I have seen that rosparam has the dump option and I was wondering if there is an analogous function in roscpp. I'd be very glad if someone could show me how it can be done.

Thanks.