C++: How to create an array using boost::property_tree?

Question

I don\'t see a way to create an array using boost::property tree. The following code ...

#include 
#include 

        

Answer 1

If you have a sub-tree whose only nodes have empty keys, then it will be serialized as an array:

boost::property_tree::ptree array;
array.push_back(std::make_pair("", "bar"));
array.push_back(std::make_pair("", "baz"));

boost::property_tree::ptree props;
props.push_back(std::make_pair("array", array));

boost::property_tree::write_json("prob.json", props);