array of strings as param tag in launch file

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Hi,

I'm trying to read an array of strings into my ros node. Here is the line in my launch file <param name="string_list" value="[this, is, a, string, array]"/>

And here is the nh.getParam() call in my node

ros::NodeHandle nh("~");`

std::vector<std::string> string_list;

nh.getParam("string_list", string_list);

I know that the param is there when I do a rosparam list. And i know the namespaces are correct since it works with a simple int param. But in this case with a vector of strings, when I read the string_list after the getParam() call, it is of 0 length

What am I doing wrong?

Thank you