1 files changed, 70 insertions, 0 deletions
diff --git a/xbmc/interfaces/legacy/Alternative.h b/xbmc/interfaces/legacy/Alternative.h
new file mode 100644
index 0000000..a715688
--- /dev/null
+++ b/xbmc/interfaces/legacy/Alternative.h
@@ -0,0 +1,70 @@
+/*
+ *  Copyright (C) 2005-2018 Team Kodi
+ *  This file is part of Kodi - https://kodi.tv
+ *
+ *  SPDX-License-Identifier: GPL-2.0-or-later
+ *  See LICENSES/README.md for more information.
+ */
+
+#pragma once
+
+#include "Exception.h"
+
+namespace XBMCAddon
+{
+  enum WhichAlternative { none, first, second };
+
+  template<typename T1, typename T2> class Alternative
+  {
+  public:
+  private:
+    WhichAlternative pos = none;
+    T1 d1;
+    T2 d2;
+
+  public:
+    Alternative() = default;
+
+    inline WhichAlternative which() const { return pos; }
+
+    inline T1& former()
+    {
+      if (pos == second)// first and none is ok
+        throw WrongTypeException("Access of XBMCAddon::Alternative as incorrect type");
+      if (pos == none)
+        d1 = T1();
+      pos = first;
+      return d1;
+    }
+
+    inline const T1& former() const
+    {
+      if (pos != first)
+        throw WrongTypeException("Access of XBMCAddon::Alternative as incorrect type");
+      return d1;
+    }
+
+    inline T2& later()
+    {
+      if (pos == first)
+        throw WrongTypeException("Access of XBMCAddon::Alternative as incorrect type");
+      if (pos == none)
+        d2 = T2();
+      pos = second;
+      return d2;
+    }
+
+    inline const T2& later() const
+    {
+      if (pos != second)
+        throw WrongTypeException("Access of XBMCAddon::Alternative as incorrect type");
+      return d2;
+    }
+
+    inline operator T1& () { return former(); }
+    inline operator const T1& () const { return former(); }
+    inline operator T2& () { return later(); }
+    inline operator const T2& () const { return later(); }
+  };
+}
+