From 1896d36996ab48ed7271e855d7e32b4e61f64896 Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Mon, 23 Apr 2012 16:48:00 +0200
Subject: Polymorphic inheritance support

---
 odb/forward.hxx | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

(limited to 'odb/forward.hxx')

diff --git a/odb/forward.hxx b/odb/forward.hxx
index 97bc7a8..4c5e4b9 100644
--- a/odb/forward.hxx
+++ b/odb/forward.hxx
@@ -73,6 +73,20 @@ namespace odb
   template <typename T>
   struct view_traits;
 
+  // Cache traits.
+  //
+  template <typename T> struct no_id_pointer_cache_traits;
+  template <typename T> struct no_op_pointer_cache_traits;
+  template <typename T> struct pointer_cache_traits;
+  template <typename T> struct no_id_reference_cache_traits;
+  template <typename T> struct no_op_reference_cache_traits;
+  template <typename T> struct reference_cache_traits;
+
+  // Polymorphism support.
+  //
+  template <typename R>
+  struct polymorphic_map;
+
   namespace details
   {
     template <>
-- 
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