closes #1

doc/examples/contain_serialization.cxx

@@ -35,10 +35,6 @@ class B: public xml::Serialize {
     }
 };
 
-std::ostream& fn(std::ostream& os) {
-  os<<std::endl<<"HALLO"<<std::endl;
-}
-
 int main(int, char**) {
   { // Serialization as a member
     std::stringstream ss("<b>\n"
@@ -56,7 +52,6 @@ int main(int, char**) {
     std::cout<<"Text B: "<<b.txt<<std::endl;
     std::cout<<"Text A: "<<b.a.txt<<std::endl;
     b.saveXml(std::cout)<<std::endl;
-    std::cout<<fn;
   }
   return 0;
 }

doc/examples/makefile.am

@@ -8,7 +8,7 @@ AM_LDFLAGS = -L${top_builddir}/src -lxml-cxx
 
 noinst_PROGRAMS = address node_macros serialization \
                   contain_serialization inherit_serialization \
-		  list_serialization
+		  list_serialization optional_serialization
 
 address_SOURCES = address.cxx
 node_macros_SOURCES = node_macros.cxx
@@ -16,5 +16,6 @@ serialization_SOURCES = serialization.cxx
 contain_serialization_SOURCES = contain_serialization.cxx
 inherit_serialization_SOURCES = inherit_serialization.cxx
 list_serialization_SOURCES = list_serialization.cxx
+optional_serialization_SOURCES = optional_serialization.cxx
 
 MAINTAINERCLEANFILES = makefile.in

doc/examples/optional_serialization.cxx

@@ -0,0 +1,46 @@
+/*! @file
+
+    @id $Id$
+*/
+//       1         2         3         4         5         6         7         8
+// 45678901234567890123456789012345678901234567890123456789012345678901234567890
+
+#include <xml-cxx/xml.hxx>
+#include <iostream>
+#include <sstream>
+
+class A: public xml::Serialize {
+  public:
+    xml::Optional<int> a;
+    xml::Optional<std::string> txt;
+  protected:
+    void initXmlMembers() {
+      className("A");
+      persist(a, "a");
+      persist(txt, "txt");
+    }
+};
+
+class B: public xml::Serialize {
+  public:
+    xml::Optional<A> a;
+    xml::Optional<int> i;
+    xml::Optional<std::string> txt;
+  protected:
+    void initXmlMembers() {
+      className("B");
+      persist(a, "a");
+      persist(i, "i");
+      persist(txt, "txt");
+    }
+};
+
+int main(int, char**) {
+  { // Serialization as a member
+    std::stringstream ss("<B/>");
+    B b;
+    b.loadXml(ss);
+    b.saveXml(std::cout)<<std::endl;
+  }
+  return 0;
+}