save_options quesion in save_options.cpp

[Mr-zhangyh]

When I output an XML file, how do I put the XML declaration on the first line and the other root nodes on the second line?
I didn't find an example in the sample code save_options.cpp.
eg：

txt

[zeux]

You would need to use pugi::format_raw and insert the declaration (if necessary) as well as the required newlines yourself, for example:

    pugi::xml_node decl = doc.prepend_child(pugi::node_declaration);
    decl.append_attribute("version").set_value("1.0");
    decl.append_attribute("encoding").set_value("utf-8");
    decl.append_attribute("standalone").set_value("yes");

    doc.insert_child_after(pugi::node_pcdata, decl).set_value("\n");
    doc.append_child(pugi::node_pcdata).set_value("\n");

    doc.save(std::cout, "", pugi::format_raw);