From 804603f33868af0450f179f66e2ddb16b84bdb80 Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Mon, 25 Apr 2011 15:02:43 +0200
Subject: Add support for abstract object types

---
 common/inheritance/driver.cxx | 30 ++++++++++++++++++++++
 common/inheritance/test.hxx   | 59 ++++++++++++++++++++++++++++++++++++++-----
 2 files changed, 82 insertions(+), 7 deletions(-)

diff --git a/common/inheritance/driver.cxx b/common/inheritance/driver.cxx
index 99dc1c5..9bb8477 100644
--- a/common/inheritance/driver.cxx
+++ b/common/inheritance/driver.cxx
@@ -64,9 +64,33 @@ main (int argc, char* argv[])
     o2.strs_.push_back ("base o2o2o2 one");
     o2.strs_.push_back ("base o2o2o2 two");
 
+    object3 o3;
+    o3.comp_.bools.push_back (false);
+    o3.comp_.bools.push_back (false);
+    o3.comp_.num = 13;
+    o3.comp_.str = "comp o3o3o3";
+    o3.comp_.nums.push_back (131);
+    o3.comp_.nums.push_back (132);
+    o3.num_ = 3;
+    o3.str_ = "base o3o3o3";
+    o3.strs_.push_back ("base o3o3o3 one");
+    o3.strs_.push_back ("base o3o3o3 two");
+
     reference r;
     r.o1_ = &o1;
 
+    empty e;
+    e.comp_.bools.push_back (true);
+    e.comp_.bools.push_back (true);
+    e.comp_.num = 14;
+    e.comp_.str = "comp eee";
+    e.comp_.nums.push_back (141);
+    e.comp_.nums.push_back (142);
+    e.num_ = 4;
+    e.str_ = "base eee";
+    e.strs_.push_back ("base eee one");
+    e.strs_.push_back ("base eee two");
+
     // persist
     //
     {
@@ -74,7 +98,9 @@ main (int argc, char* argv[])
       db->persist (b);
       db->persist (o1);
       db->persist (o2);
+      db->persist (o3);
       db->persist (r);
+      db->persist (e);
       t.commit ();
     }
 
@@ -85,13 +111,17 @@ main (int argc, char* argv[])
       auto_ptr<base> lb (db->load<base> (b.id_));
       auto_ptr<object1> lo1 (db->load<object1> (o1.id_));
       auto_ptr<object2> lo2 (db->load<object2> (o2.id_));
+      auto_ptr<object3> lo3 (db->load<object3> (o3.id_));
+      auto_ptr<empty> le (db->load<empty> (e.id_));
       auto_ptr<reference> lr (db->load<reference> (r.id_));
       t.commit ();
 
       assert (b == *lb);
       assert (o1 == *lo1);
       assert (o2 == *lo2);
+      assert (o3 == *lo3);
       assert (lr->o1_->id_ == r.o1_->id_);
+      assert (e == *le);
 
       delete lr->o1_;
     }
diff --git a/common/inheritance/test.hxx b/common/inheritance/test.hxx
index 31ef9c1..5ef2ea4 100644
--- a/common/inheritance/test.hxx
+++ b/common/inheritance/test.hxx
@@ -42,12 +42,9 @@ struct comp: comp_base
   }
 };
 
-#pragma db object
-struct base
+#pragma db object abstract
+struct abstract_base
 {
-  #pragma db id auto
-  unsigned long id_;
-
   comp comp_;
 
   unsigned int num_;
@@ -56,10 +53,9 @@ struct base
   std::vector<std::string> strs_;
 
   bool
-  operator== (const base& y) const
+  operator== (const abstract_base& y) const
   {
     return
-      id_ == y.id_ &&
       comp_ == y.comp_ &&
       num_ == y.num_ &&
       str_ == y.str_ &&
@@ -68,6 +64,19 @@ struct base
 };
 
 #pragma db object
+struct base: abstract_base
+{
+  #pragma db id auto
+  unsigned long id_;
+
+  bool
+  operator== (const base& y) const
+  {
+    return id_ == y.id_ && static_cast<const abstract_base&> (*this) == y;
+  }
+};
+
+#pragma db object
 struct object1: base
 {
   unsigned int num1_;
@@ -92,6 +101,8 @@ struct object2: base
   }
 };
 
+// Reference to derived object.
+//
 #pragma db object
 struct reference
 {
@@ -101,4 +112,38 @@ struct reference
   object1* o1_;
 };
 
+// Multiple inheritance.
+//
+#pragma db object abstract
+struct id_base
+{
+  #pragma db id auto
+  unsigned long id_;
+
+  bool
+  operator== (const id_base& y) const
+  {
+    return id_ == y.id_;
+  }
+};
+
+#pragma db object
+struct object3: abstract_base, id_base
+{
+  bool
+  operator== (const object3& y) const
+  {
+    return
+      static_cast<const abstract_base&> (*this) == y &&
+      static_cast<const id_base&> (*this) == y;
+  }
+};
+
+// Empty derived object.
+//
+#pragma db object
+struct empty: base
+{
+};
+
 #endif // TEST_HXX
-- 
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