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+// file : odb/tr1/wrapper-traits.hxx
+// author : Boris Kolpackov <boris@codesynthesis.com>
+// copyright : Copyright (c) 2009-2011 Code Synthesis Tools CC
+// license : GNU GPL v2; see accompanying LICENSE file
+
+#ifndef ODB_TR1_WRAPPER_TRAITS_HXX
+#define ODB_TR1_WRAPPER_TRAITS_HXX
+
+#include <odb/pre.hxx>
+
+//
+// This header assumes that the necessary TR1 header has already
+// been included.
+//
+
+#include <odb/wrapper-traits.hxx>
+
+namespace odb
+{
+ // Specialization for std::tr1::shared_ptr.
+ //
+ template <typename T>
+ class wrapper_traits< std::tr1::shared_ptr<T> >
+ {
+ public:
+ typedef T wrapped_type;
+ typedef std::tr1::shared_ptr<T> wrapper_type;
+
+ static const bool null_handler = true;
+ static const bool null_default = false;
+
+ static bool
+ get_null (const wrapper_type& p)
+ {
+ return !p;
+ }
+
+ static void
+ set_null (wrapper_type& p)
+ {
+ p.reset ();
+ }
+
+ static const wrapped_type&
+ get_ref (const wrapper_type& p)
+ {
+ return *p;
+ }
+
+ static wrapped_type&
+ set_ref (wrapper_type& p)
+ {
+ if (!p)
+ p.reset (new wrapped_type);
+
+ return *p;
+ }
+ };
+}
+
+#include <odb/post.hxx>
+
+#endif // ODB_TR1_WRAPPER_TRAITS_HXX