1 files changed, 57 insertions, 0 deletions
diff --git a/libodb/odb/details/meta/polymorphic-p.hxx b/libodb/odb/details/meta/polymorphic-p.hxx
new file mode 100644
index 0000000..10fef6a
--- /dev/null
+++ b/libodb/odb/details/meta/polymorphic-p.hxx
@@ -0,0 +1,57 @@
+// file      : odb/details/meta/polymorphic-p.hxx
+// license   : GNU GPL v2; see accompanying LICENSE file
+
+#ifndef ODB_DETAILS_META_POLYMORPHIC_HXX
+#define ODB_DETAILS_META_POLYMORPHIC_HXX
+
+#include <odb/pre.hxx>
+
+#include <odb/details/config.hxx> // ODB_NOTHROW_NOEXCEPT
+#include <odb/details/meta/class-p.hxx>
+#include <odb/details/meta/remove-const-volatile.hxx>
+
+namespace odb
+{
+  namespace details
+  {
+    namespace meta
+    {
+      template <typename CVX>
+      struct polymorphic_p
+      {
+        typedef typename remove_const_volatile<CVX>::result X;
+
+        template <typename Y, bool C>
+        struct impl
+        {
+          static const bool result = false;
+        };
+
+        template <typename Y>
+        struct impl<Y, true>
+        {
+          struct t1: Y
+          {
+            t1 ();
+          };
+
+          struct t2: Y
+          {
+            t2 ();
+
+            virtual
+            ~t2 () ODB_NOTHROW_NOEXCEPT;
+          };
+
+          static const bool result = sizeof (t1) == sizeof (t2);
+        };
+
+        static const bool result = impl<X, class_p<X>::result>::result;
+      };
+    }
+  }
+}
+
+#include <odb/post.hxx>
+
+#endif // ODB_DETAILS_META_POLYMORPHIC_HXX