1 files changed, 63 insertions, 0 deletions
diff --git a/libodb-boost/odb/boost/optional/wrapper-traits.hxx b/libodb-boost/odb/boost/optional/wrapper-traits.hxx
new file mode 100644
index 0000000..80d4319
--- /dev/null
+++ b/libodb-boost/odb/boost/optional/wrapper-traits.hxx
@@ -0,0 +1,63 @@
+// file      : odb/boost/optional/wrapper-traits.hxx
+// license   : GNU GPL v2; see accompanying LICENSE file
+
+#ifndef ODB_BOOST_OPTIONAL_WRAPPER_TRAITS_HXX
+#define ODB_BOOST_OPTIONAL_WRAPPER_TRAITS_HXX
+
+#include <odb/pre.hxx>
+
+#include <boost/none.hpp>
+#include <boost/optional.hpp>
+
+#include <odb/wrapper-traits.hxx>
+
+namespace odb
+{
+  template <typename T>
+  class wrapper_traits< ::boost::optional<T> >
+  {
+  public:
+    typedef T wrapped_type;
+    typedef ::boost::optional<T> wrapper_type;
+
+    // T can be const.
+    //
+    typedef
+    typename odb::details::meta::remove_const<T>::result
+    unrestricted_wrapped_type;
+
+    static const bool null_handler = true;
+    static const bool null_default = true;
+
+    static bool
+    get_null (const wrapper_type& o)
+    {
+      return !o;
+    }
+
+    static void
+    set_null (wrapper_type& o)
+    {
+      o = ::boost::none;
+    }
+
+    static const wrapped_type&
+    get_ref (const wrapper_type& o)
+    {
+      return *o;
+    }
+
+    static unrestricted_wrapped_type&
+    set_ref (wrapper_type& o)
+    {
+      if (!o)
+        o = unrestricted_wrapped_type ();
+
+      return const_cast<unrestricted_wrapped_type&> (*o);
+    }
+  };
+}
+
+#include <odb/post.hxx>
+
+#endif // ODB_BOOST_OPTIONAL_WRAPPER_TRAITS_HXX