Create placeholders to optimization methods

src/opt/optimize_objectives.h

@@ -0,0 +1,35 @@
+/*++
+Copyright (c) 2013 Microsoft Corporation
+
+Module Name:
+
+    optimize_objectives.h
+
+Abstract:
+   
+    Objective optimization method.
+
+Author:
+
+    Anh-Dung Phan (t-anphan) 2013-10-16
+
+Notes:
+
+--*/
+#ifndef _OPT_OBJECTIVES_H_
+#define _OPT_OBJECTIVES_H_
+
+#include "solver.h"
+
+namespace opt {
+    /**
+       Takes solver with hard constraints added.
+       Returns an optimal assignment to objective functions.
+    */
+    
+    lbool optimize_objectives(solver& s, 
+                          expr_ref_vector& objectives, svector<bool> const& is_max,
+                          vector<optional<rational> >& values);
+};
+
+#endif