void write_json_helper(std::basic_ostream<typename Ptree::key_type::value_type> &stream, const Ptree &pt, int indent, bool pretty) { typedef typename Ptree::key_type::value_type Ch; typedef typename std::basic_string<Ch> Str; // Value or object or array if (indent > 0 && pt.empty()) { // Write value Str data = create_escapes(pt.template get_value<Str>()); stream << Ch('"') << data << Ch('"'); } else if (indent > 0 && pt.count(Str()) == pt.size()) { // Write array stream << Ch('['); if (pretty) stream << Ch('\n'); typename Ptree::const_iterator it = pt.begin(); for (; it != pt.end(); ++it) { if (pretty) stream << Str(4 * (indent + 1), Ch(' ')); write_json_helper(stream, it->second, indent + 1, pretty); if (lslboost::next(it) != pt.end()) stream << Ch(','); if (pretty) stream << Ch('\n'); } stream << Str(4 * indent, Ch(' ')) << Ch(']'); } else { // Write object stream << Ch('{'); if (pretty) stream << Ch('\n'); typename Ptree::const_iterator it = pt.begin(); for (; it != pt.end(); ++it) { if (pretty) stream << Str(4 * (indent + 1), Ch(' ')); stream << Ch('"') << create_escapes(it->first) << Ch('"') << Ch(':'); if (pretty) { if (it->second.empty()) stream << Ch(' '); else stream << Ch('\n') << Str(4 * (indent + 1), Ch(' ')); } write_json_helper(stream, it->second, indent + 1, pretty); if (lslboost::next(it) != pt.end()) stream << Ch(','); if (pretty) stream << Ch('\n'); } if (pretty) stream << Str(4 * indent, Ch(' ')); stream << Ch('}'); } }