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+/* This file is part of Ingen.
+ * Copyright 2007-2011 David Robillard <http://drobilla.net>
+ *
+ * Ingen is free software; you can redistribute it and/or modify it under the
+ * terms of the GNU General Public License as published by the Free Software
+ * Foundation; either version 2 of the License, or (at your option) any later
+ * version.
+ *
+ * Ingen is distributed in the hope that it will be useful, but WITHOUT ANY
+ * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+ * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef INGEN_INTERFACE_PORT_HPP
+#define INGEN_INTERFACE_PORT_HPP
+
+#include <stdint.h>
+
+#include "ingen/GraphObject.hpp"
+
+namespace Raul { class Atom; }
+
+namespace Ingen {
+
+/** A Port on a Node.
+ *
+ * Purely virtual (except for the destructor).
+ *
+ * \ingroup interface
+ */
+class Port : public virtual GraphObject
+{
+public:
+	virtual bool supports(const Raul::URI& value_type) const = 0;
+
+	virtual uint32_t          index()    const = 0;
+	virtual bool              is_input() const = 0;
+	virtual const Raul::Atom& value()    const = 0;
+};
+
+} // namespace Ingen
+
+#endif // INGEN_INTERFACE_PORT_HPP