libxml-cxx/doc/examples/inherit_serialization.cxx

/*! @file

    @id $Id$
*/
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// 45678901234567890123456789012345678901234567890123456789012345678901234567890

#include <xml-cxx/xml.hxx>
#include <iostream>
#include <sstream>

class A: public xml::Serialize {
  public:
    int a;
    std::string txt;
  protected:
    void initXmlMembers() {
      className("A");
      persist(a, "a");
      persist(txt, "txt");
    }
};

class B: public A { // A inherits xml::Serialize, B inherits A
  public:
    int b;
  protected:
    void initXmlMembers() {
      A::initXmlMembers(); // <- Here is the important difference
      className("B");
      persist(b, "b");
    }
};

int main(int, char**) {
  std::stringstream ss("<B>\n"
                       "\t<b>1234</b>\n"
                       "\t<a>5678</a>\n"
                       "\t<txt>Dies ist ein Serialisierungs-Test</txt>\n"
                       "</B>");
  B b;
  b.loadXml(ss);
  if (b.b==1234) b.b=4321;
  if (b.a==5678) b.a=8765;
  b.saveXml(std::cout)<<std::endl;
  return 0;
}