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## Function template write_xml

boost::property_tree::xml_parser::write_xml

## Synopsis

    // In header: <boost/property_tree/xml_parser.hpp>

    template<typename Ptree>
      void write_xml(const std::string & filename, const Ptree & pt,
                     const std::locale & loc = std::locale(),
                     const xml_writer_settings< typename Ptree::key_type > & settings = xml_writer_settings< typename Ptree::key_type >());

## Description

Translates the property tree to XML and writes it the given file.

Parameters:

`filename` | The file to which to write the XML representation of the property tree.
`loc` | The locale to use when writing the output to file.
`pt` | The property tree to tranlsate to XML and output.
`settings` | The settings to use when writing out the property tree as XML.

Throws: | xml_parser_error In case of error translating the property tree to XML or writing to the output stream.