Hi, I don't know how to solve it with pure Boost.PropertyTree, but using Boost.Iostreams it can be done quite easy. Example below, hope it suits your need. Configuring XML-formatting itself I leave up to you. #include <boost/iostreams/device/file.hpp> #include <boost/iostreams/filter/line.hpp> #include <boost/iostreams/filtering_stream.hpp> #include <boost/property_tree/ptree.hpp> #include <boost/property_tree/xml_parser.hpp> namespace io = boost::iostreams; class prefix_front_pusher: public io::line_filter /* may use wline_filter */ { public: using io::line_filter::string_type; explicit prefix_front_pusher(const string_type &prefix): m_prefix(prefix) {} private: string_type do_filter(const string_type &line) override { return m_prefix + line; } const string_type m_prefix; }; int main() { io::filtering_ostream out; out.push(prefix_front_pusher("/* my prefix */")); out.push(io::file_sink("my_file.txt")); boost::property_tree::ptree ptree; ptree.put("hello", "world"); boost::property_tree::write_xml(out, ptree); } On Thu, Mar 19, 2015 at 6:10 AM Uthpal Urubail <uthpal.urubail@altair.com> wrote:
Unfortunately my requirement is to add comments to the beginning of the line. I understand this makes invalid XML.
I don't know about the property tree writer, but that's an invalid Xml comment. http://www.w3.org/TR/REC-xml/#sec-comments
Regards, UJ _______________________________________________ Boost-users mailing list Boost-users@lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users