1 files changed, 87 insertions, 0 deletions
diff --git a/odb/details/function-wrapper.txx b/odb/details/function-wrapper.txx
new file mode 100644
index 0000000..70dcb0f
--- /dev/null
+++ b/odb/details/function-wrapper.txx
@@ -0,0 +1,87 @@
+// file      : odb/details/function-wrapper.txx
+// copyright : Copyright (c) 2009-2014 Code Synthesis Tools CC
+// license   : GNU GPL v2; see accompanying LICENSE file
+
+#include <utility> // std::swap, std::move
+
+namespace odb
+{
+  namespace details
+  {
+#ifdef ODB_CXX11
+    template <typename F>
+    struct caller_impl;
+
+#ifdef ODB_CXX11_VARIADIC_TEMPLATE
+    template <typename R, typename... A>
+    struct caller_impl<R (A...)>
+    {
+      static R
+      function (const void* f, A... a)
+      {
+        return (*static_cast<const std::function<R (A...)>*> (f)) (a...);
+      }
+    };
+#else
+    template <typename R, typename A1>
+    struct caller_impl<R (A1)>
+    {
+      static R
+      function (const void* f, A1 a1)
+      {
+        return (*static_cast<const std::function<R (A1)>*> (f)) (a1);
+      }
+    };
+
+    template <typename R, typename A1, typename A2>
+    struct caller_impl<R (A1, A2)>
+    {
+      static R
+      function (const void* f, A1 a1, A2 a2)
+      {
+        return (*static_cast<const std::function<R (A1, A2)>*> (f)) (a1, a2);
+      }
+    };
+#endif
+
+    template <typename F>
+    void
+    deleter_impl (const void* f)
+    {
+      delete static_cast<const std::function<F>*> (f);
+    }
+
+    template <typename F>
+    template <typename F1>
+    function_wrapper<F>::
+    function_wrapper (
+      F1 f,
+      typename std::enable_if<!std::is_convertible<F1, F*>::value>::type*)
+    {
+      std_function_type sf (std::move (f));
+
+      if (F* const* const f = sf.template target<F*> ())
+      {
+        function = *f;
+        deleter = 0;
+        std_function = 0;
+      }
+      else
+      {
+        function = reinterpret_cast<F*> (&caller_impl<F>::function);
+        deleter = &deleter_impl<F>;
+        std_function = new std_function_type (std::move (sf));
+      }
+    }
+#endif
+
+    template <typename F>
+    void function_wrapper<F>::
+    swap (function_wrapper<F>& x)
+    {
+      std::swap (function, x.function);
+      std::swap (deleter, x.deleter);
+      std::swap (std_function, x.std_function);
+    }
+  }
+}