Initial implementation

1 files changed, 51 insertions, 0 deletions

diff --git a/odb/meta/polymorphic-p.hxx b/odb/meta/polymorphic-p.hxx
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+// file      : odb/meta/polymorphic-p.hxx
+// author    : Boris Kolpackov <boris@codesynthesis.com>
+// copyright : Copyright (c) 2009-2010 Code Synthesis Tools CC
+// license   : GNU GPL v2; see accompanying LICENSE file
+
+#ifndef ODB_META_POLYMORPHIC_HXX
+#define ODB_META_POLYMORPHIC_HXX
+
+#include <odb/meta/class-p.hxx>
+#include <odb/meta/remove-cv.hxx>
+
+namespace odb
+{
+  namespace meta
+  {
+    template <typename CVX>
+    struct polymorphic_p
+    {
+      typedef typename remove_cv<CVX>::r X;
+
+      template <typename Y, bool C>
+      struct impl
+      {
+        static const bool r = false;
+      };
+
+      template <typename Y>
+      struct impl<Y, true>
+      {
+        struct t1: Y
+        {
+          t1 ();
+        };
+
+        struct t2: Y
+        {
+          t2 ();
+
+          virtual
+          ~t2 () throw ();
+        };
+
+        static const bool r = sizeof (t1) == sizeof (t2);
+      };
+
+      static const bool r = impl<X, class_p<X>::r>::r;
+    };
+  }
+}
+
+#endif // ODB_META_POLYMORPHIC_HXX