From 15b1a95942518c84f8161c59820ea5d0e49a4e54 Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Fri, 27 Apr 2012 11:36:43 +0200
Subject: Add support for NULL pointers to objects with composite object ids

---
 odb/context.cxx | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

(limited to 'odb/context.cxx')

diff --git a/odb/context.cxx b/odb/context.cxx
index f699f38..693ada4 100644
--- a/odb/context.cxx
+++ b/odb/context.cxx
@@ -296,6 +296,21 @@ readonly (semantics::data_member& m)
 }
 
 bool context::
+null (data_member_path const& mp)
+{
+  // Outer members can override the null-ability of the inner ones. So
+  // start from the most outer member.
+  //
+  for (data_member_path::const_iterator i (mp.begin ()); i != mp.end (); ++i)
+  {
+    if (null (**i))
+      return true;
+  }
+
+  return false;
+}
+
+bool context::
 null (semantics::data_member& m)
 {
   semantics::type& t (utype (m));
-- 
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