Z3 sources

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

lib/spc_eq_resolution.h

@@ -0,0 +1,50 @@
+/*++
+Copyright (c) 2006 Microsoft Corporation
+
+Module Name:
+
+    spc_eq_resolution.h
+
+Abstract:
+
+    <abstract>
+
+Author:
+
+    Leonardo de Moura (leonardo) 2008-02-14.
+
+Revision History:
+
+--*/
+#ifndef _SPC_EQ_RESOLUTION_H_
+#define _SPC_EQ_RESOLUTION_H_
+
+#include"spc_unary_inference.h"
+#include"spc_statistics.h"
+
+namespace spc {
+
+    /**
+       \brief Functor for applying equality resolution.
+
+       s != t or R
+       ==>
+       sigma(R)
+    */
+    class eq_resolution : public unary_inference { 
+    protected:
+        statistics & m_stats;
+        family_id    m_spc_fid;
+        virtual justification * mk_justification(justification * parent, unsigned num_lits, literal * new_lits) {
+            return mk_eq_res_justification(m_manager, m_spc_fid, parent, num_lits, new_lits);
+        }
+    public:
+        eq_resolution(ast_manager & m, order & ord, statistics & stats):unary_inference(m, ord), m_stats(stats), m_spc_fid(m.get_family_id("spc")) {}
+        virtual ~eq_resolution() {}
+        void operator()(clause * cls, ptr_vector<clause> & new_clauses);
+    };
+};
+
+
+#endif /* _SPC_EQ_RESOLUTION_H_ */
+