I don't see a way to create an array using boost::property tree. The following code ...
#include <boost/property_tree/ptree.hpp>
#include <boost/property_tree/json_parser.hpp>
#include <iostream>
int main()
{
try {
boost::property_tree::ptree props;
props.push_back(std::make_pair("foo", "bar"));
props.push_back(std::make_pair("foo", "baz"));
boost::property_tree::write_json("prob.json", props);
} catch (const std::exception & ex) {
std::cout << ex.what() << std::endl;
}
}
... just gives me ...
{
"foo": "bar",
"foo": "baz"
}
The docs on boost::property_tree are sparse. How do I create an JSON array with boost::property_tree?
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);