Z3 sources

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>

lib/goal2nlsat.h

@@ -0,0 +1,75 @@
+/*++
+Copyright (c) 2012 Microsoft Corporation
+
+Module Name:
+
+    goal2nlsat.h
+
+Abstract:
+
+    "Compile" a goal into the nonlinear arithmetic engine.
+    Non-arithmetic atoms are "abstracted" into boolean variables.
+    Non-supported terms are "abstracted" into variables.
+
+    The mappings can be used to convert back the state of the 
+    engine into a goal.
+
+Author:
+
+    Leonardo (leonardo) 2012-01-02
+
+Notes:
+
+--*/
+#ifndef _GOAL2NLSAT_H_
+#define _GOAL2NLSAT_H_
+
+#include"nlsat_types.h"
+#include"model_converter.h"
+
+class goal;
+class expr2var;
+
+class goal2nlsat {
+    struct imp;
+    imp *  m_imp;
+    struct scoped_set_imp;
+public:
+    goal2nlsat();
+    ~goal2nlsat();
+    
+    static void collect_param_descrs(param_descrs & r);
+    
+    /**
+       \brief "Compile" the goal into the given nlsat engine.
+       Store a mapping from atoms to boolean variables into a2b.
+       Store a mapping from terms into arithmetic variables into t2x.
+       
+       \remark a2b and t2x m don't need to be empty. The definitions there are reused.
+
+       The input is expected to be in CNF
+    */
+    void operator()(goal const & g, params_ref const & p, nlsat::solver & s, expr2var & a2b, expr2var & t2x);
+    
+    void set_cancel(bool f);
+};
+
+class nlsat2goal {
+    struct imp;
+    imp *  m_imp;
+public:
+    nlsat2goal();
+    ~nlsat2goal();
+
+    static void collect_param_descrs(param_descrs & r);
+
+    /**
+       \brief Translate the state of the nlsat engine back into a goal.
+    */
+    void operator()(nlsat::solver const & s, expr2var const & a2b, expr2var const & t2x,
+                    params_ref const & p, goal & g, model_converter_ref & mc);
+    
+    void set_cancel(bool f);
+};
+
+#endif