1 files changed, 30 insertions, 0 deletions
diff --git a/odb/relational/common.hxx b/odb/relational/common.hxx
index 276868c..26e8197 100644
--- a/odb/relational/common.hxx
+++ b/odb/relational/common.hxx
@@ -6,6 +6,7 @@
 #define ODB_RELATIONAL_COMMON_HXX
 
 #include <map>
+#include <set>
 #include <cstddef> // std::size_t
 #include <cassert>
 #include <typeinfo>
@@ -221,6 +222,35 @@ namespace relational
     }
   };
 
+  // Generate alias tags and alias_traits specializations for pointers
+  // in this objects.
+  //
+  struct query_alias_traits: object_columns_base, virtual context
+  {
+    typedef query_alias_traits base;
+
+    query_alias_traits (std::set<string>& tags, std::set<string>& specs)
+        : tags_ (tags), specs_ (specs) {}
+
+    virtual void
+    traverse_object (semantics::class_&);
+
+    virtual void
+    traverse_pointer (semantics::data_member&, semantics::class_&);
+
+    virtual void
+    generate (string const& alias, semantics::class_&);
+
+  private:
+    void
+    generate_specialization (string const& alias,
+                             string const& tag,
+                             semantics::class_&);
+
+    std::set<string>& tags_;
+    std::set<string>& specs_;
+  };
+
   //
   //
   struct query_columns_base: object_columns_base, virtual context