boost-propertytree

I would like to share with you an issue I'm having while trying to process some attributes from XML elements in C++ with Boost libraries (version 1.52.0). Given the following code: #define ATTR_SET ".<xmlattr>" #define XML_PATH1 "./pets.xml" #include <iostream> #include <string> #include <boost/foreach.hpp> #include <boost/property_tree/ptree.hpp> #include <boost/property_tree/xml_parser.hpp> using namespace std; using namespace boost; using namespace boost::property_tree; const ptree& empty_ptree(){ static ptree t; return t; } int main() { ptree tree; read_xml(XML_PATH1, tree); const ptree &

I'm trying to create a JSON array using boost property trees. The documentation says: "JSON arrays are mapped to nodes. Each element is a child node with an empty name." So I'd like to create a property tree with empty names, then call write_json(...) to get the array out. However, the documentation doesn't tell me how to create unnamed child nodes. I tried ptree.add_child("", value) , but this yields: Assertion `!p.empty() && "Empty path not allowed for put_child."' failed The documentation doesn't seem to address this point, at least not in any way I can figure out. Can anyone help?

I am using boost/property_tree to create an XML file. Unfortunately I cannot figure out how to add xml-stylesheet processing instructions to the file. Desirable output: <?xml version="1.0" encoding="utf-8"?> <-- This is added automatically <?xml-stylesheet type="text/xsl" href="report.xsl"?> <-- How to add this line <report> ... </report> Is that possible with boost/property_tree/ptree? It appears that boost/property_tree xml writer doesn't have a support for xml stylesheets processing instructions. First line (xml version) is simply hardcoded in the write_xml_internal function. So I've just

I'm using boost::property_tree to read and write XML configuration files in my application. But when I write the file the output looks kind of ugly with lots of empty lines in the file. The problem is that it's supposed to be edited by humans too so I'd like to get a better output. As an example I wrote a small test program : #include <boost/property_tree/ptree.hpp> #include <boost/property_tree/xml_parser.hpp> int main( void ) { using boost::property_tree::ptree; ptree pt; // reading file.xml read_xml("file.xml", pt); // writing the unchanged ptree in file2.xml boost::property_tree::xml

I'm trying to serialize using boost property tree write_json, it saves everything as strings, it's not that data are wrong, but I need to cast them explicitly every time and I want to use them somewhere else. (like in python or other C++ json (non boost) library) here is some sample code and what I get depending on locale: boost::property_tree::ptree root, arr, elem1, elem2; elem1.put<int>("key0", 0); elem1.put<bool>("key1", true); elem2.put<float>("key2", 2.2f); elem2.put<double>("key3", 3.3); arr.push_back( std::make_pair("", elem1) ); arr.push_back( std::make_pair("", elem2) ); root.put

I'm newbie to C++. What's the easiest way to serialize and deserialize data of type std::Map using boost . I've found some examples with using PropertyTree but they are obscure for me. ArtemGr Note that property_tree interprets the keys as paths, e.g. putting the pair "a.b"="z" will create an {"a":{"b":"z"}} JSON, not an {"a.b":"z"}. Otherwise, using property_tree is trivial. Here is a little example. #include <sstream> #include <map> #include <boost/property_tree/ptree.hpp> #include <boost/property_tree/json_parser.hpp> using boost::property_tree::ptree; using boost::property_tree::read_json;