Added an example of the non default constructible class.

Refined an intrusive example. It includes base class serialization. We can switch map based and array based serialization.

example/cpp03/class_intrusive.cpp

@@ -21,17 +21,42 @@
 #include <sstream>
 #include <cassert>
 
+#if 0 // When you want to adapt map instead of array, you can enable these macro definition.
+#define MSGPACK_USE_DEFINE_MAP
+#define MSGPACK_USE_BOOST
+#endif
+
 #include <msgpack.hpp>
 
+struct my_base1 {
+    int a;
+    MSGPACK_DEFINE(a);
+};
+inline bool operator==(my_base1 const& lhs, my_base1 const& rhs) {
+    return lhs.a == rhs.a;
+}
 
-class my_class {
+struct my_base2 {
+    std::string b;
+    std::string c;
+    MSGPACK_DEFINE(b, c);
+};
+inline bool operator==(my_base2 const& lhs, my_base2 const& rhs) {
+    return lhs.b == rhs.b && lhs.c == rhs.c;
+}
+
+class my_class : public my_base1, private my_base2 {
 public:
     my_class() {} // When you want to convert from msgpack::object to my_class,
                   // my_class should be default constractible.
     my_class(std::string const& name, int age):name_(name), age_(age) {}
-
+    void set_b(std::string const& str) { b = str; }
+    void set_c(std::string const& str) { c = str; }
     friend bool operator==(my_class const& lhs, my_class const& rhs) {
-        return lhs.name_ == rhs.name_ && lhs.age_ == rhs.age_;
+        return
+            static_cast<my_base1 const&>(lhs) == static_cast<my_base1 const&>(rhs) &&
+            static_cast<my_base2 const&>(lhs) == static_cast<my_base2 const&>(rhs) &&
+            lhs.name_ == rhs.name_ && lhs.age_ == rhs.age_;
     }
 
 private:
@@ -39,7 +64,7 @@ private:
     int age_;
 
 public:
-    MSGPACK_DEFINE(name_, age_);
+    MSGPACK_DEFINE(name_, age_, MSGPACK_BASE(my_base1), MSGPACK_BASE(my_base2));
 };
 
 void print(std::string const& buf) {
@@ -59,6 +84,9 @@ void print(std::string const& buf) {
 int main() {
     {   // pack, unpack
         my_class my("John Smith", 42);
+        my.a = 123;
+        my.set_b("ABC");
+        my.set_c("DEF");
         std::stringstream ss;
         msgpack::pack(ss, my);
 
@@ -72,6 +100,8 @@ int main() {
     }
     {   // create object with zone
         my_class my("John Smith", 42);
+        my.set_b("ABC");
+        my.set_c("DEF");
         msgpack::zone z;
         msgpack::object obj(my, z);
         std::cout << obj << std::endl;