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diff --git a/src/engine/machina/Evolver.hpp b/src/engine/machina/Evolver.hpp
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+/* This file is part of Machina.
+ * Copyright (C) 2007 Dave Robillard <http://drobilla.net>
+ * 
+ * Machina 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.
+ * 
+ * Machina 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 MACHINA_EVOLVER_HPP
+#define MACHINA_EVOLVER_HPP
+
+#include <raul/SharedPtr.hpp>
+#include <raul/Thread.hpp>
+#include <eugene/core/GAImpl.hpp>
+#include "Schrodinbit.hpp"
+
+namespace Eugene { template <typename G> class HybridMutation; }
+
+namespace Machina {
+
+class Machine;
+class Problem;
+
+
+class Evolver : public Raul::Thread {
+public:
+	Evolver(const string& target_midi, SharedPtr<Machine> seed);
+	
+	void seed(SharedPtr<Machine> parent);
+	bool improvement() { return _improvement; }
+
+	SharedPtr<const Machine> best() { return _ga->best(); }
+	
+	typedef Eugene::GAImpl<Machine> MachinaGA;
+	
+private:
+	void _run();
+
+	SharedPtr<MachinaGA> _ga;
+	SharedPtr<Problem>   _problem;
+	float                _active_fitness;
+	Schrodinbit          _improvement;
+};
+
+
+} // namespace Machina
+
+#endif // MACHINA_EVOLVER_HPP