I am using boost::property_tree::xml_parser to create an xml-file. Now I also need to add comments to the xml-file.
I've done some research and found out that comments are not allowed in JSON, and thus also not supported by the boost::property_tree::json_parser...
Furthermore I found out, that there is a no_comments flag for skipping xml-comments when reading an xml-file...
But what about adding xml-comments to a file?
If comments are not disabled with the mentioned flag, they get represented as nodes named <xmlcomment> (just like attributes are under nodes named <xmlattr>):
#include <boost/property_tree/xml_parser.hpp>
#include <iostream>
int main() {
boost::property_tree::ptree pt;
pt.put("some.node.<xmlattr>.attr1", "value1");
pt.put("some.node.<xmlcomment>", "\nEhffvna Jnefuvc\nTb Shpx Lbhefrys\n");
write_xml(std::cout, pt);
}
Which prints
<?xml version="1.0" encoding="utf-8"?>
<some><node attr1="value1"><!--
Ehffvna Jnefuvc
Tb Shpx Lbhefrys
--></node></some>