原文地址：http://www.boost.org/doc/libs/1_61_0/doc/html/property_tree/tutorial.html
#include <boost/property_tree/ptree.hpp>
#include <boost/property_tree/xml_parser.hpp>
#include <boost/foreach.hpp>
#include <string>
#include <set>
#include <exception>
#include <iostream>
namespace pt = boost::property_tree;
struct debug_settings
{
std::string m_file;
int m_level;
std::set<std::string> m_modules;
void load(const std::string &filename);
void save(const std::string &filename);
};
void debug_settings::load(const std::string &filename)
{
pt::ptree tree;
pt::read_xml(filename, tree);
m_file = tree.get<std::string>(“debug.filename”);
m_level = tree.get(“debug.level”, 0);
BOOST_FOREACH(pt::ptree::value_type &v, tree.get_child(“debug.modules”))
m_modules.insert(v.second.data());
}
void debug_settings::save(const std::string &filename)
{
pt::ptree tree;
tree.put(“debug.filename”, m_file);
tree.put(“debug.level”, m_level);
BOOST_FOREACH(const std::string &name, m_modules)
tree.add(“debug.modules.module”, name);
pt::write_xml(filename, tree);
}
int main()
{
try
{
debug_settings ds;
ds.load(“debug_settings.xml”);
ds.save(“debug_settings_out.xml”);
std::cout << “Success!\n”;
}
catch (std::exception &e)
{
std::cout << “Error: ” << e.what() << “\n”;
}
return 0;
}