It takes the name of a file or a URL and will parse the entire file before returning. The easiest way is to use the xml::event_parser::parse_file() member function. The xml::event_parser provides a few different ways of parsing XML documents. Once you have created a class that is derived from xml::event_parser and have overridden the necessary member functions, you are ready to parse XML documents with it. Using the Derived Class to Parse an XML Document If you return false, or throw an exception, the XML parser will stop parsing the current document.įor a good example of event parsing, see the 02-event_parsing example in the examples directory. With all of these member functions, you should return true if you want the XML parser to continue. Optional the default implementation ignores warnings The XML parser found a non-fatal error in the XML document. Optional the default implementation ignores comments Optional the default implementation ignores processing instructions Xml::event_parser::processing_instruction() Optional the default implementation calls xml::event_parser::text()Ī processing instruction has been parsed. The following table lists a description of each event and the member function you should override to receive that event. You should then override the appropriate member functions.
In order to receive these events, you will need to derive a class from the xmlwrapp xml::event_parser class. Events, such as the parser encountering an opening element, will trigger a call to the corresponding member function of your class. In xmlwrapp, these callbacks turn out to be protected virtual member functions that you will override.
FINAL DRAFT TAGGER ERROR PARSING XML HOW TO
They describe how to work with the xml::document, xml::node and xml::attributes objects.Įvent parsing is done using callbacks. The following chapters should answer your questions. At this point, you may be wondering how you work with this node tree. As you can see, using the xml::tree_parser class is very easy.
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