Z3 sources

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

lib/sat_clause_set.h

@@ -0,0 +1,56 @@
+/*++
+Copyright (c) 2011 Microsoft Corporation
+
+Module Name:
+
+    sat_clause_set.h
+
+Abstract:
+
+    Set of clauses
+
+Author:
+
+    Leonardo de Moura (leonardo) 2011-05-25.
+
+Revision History:
+
+--*/
+#ifndef _SAT_CLAUSE_SET_H_
+#define _SAT_CLAUSE_SET_H_
+
+#include"sat_clause.h"
+
+namespace sat {
+
+    class clause_set {
+        unsigned_vector m_id2pos; 
+        clause_vector   m_set;
+    public:
+        typedef clause_vector::const_iterator iterator;
+
+        bool contains(clause const & cls) const { 
+            if (cls.id() >= m_id2pos.size()) 
+                return false; 
+            return m_id2pos[cls.id()] != UINT_MAX; 
+        }
+        bool empty() const { return m_set.empty(); }
+        unsigned size() const { return m_set.size(); }
+        void insert(clause & c);
+        void erase(clause & c);
+
+        // erase some clause from the set
+        clause & erase();
+
+        void reset() { m_id2pos.reset(); m_set.reset(); }
+        void finalize() { m_id2pos.finalize(); m_set.finalize(); }
+
+        iterator begin() const { return m_set.begin(); }
+        iterator end() const { return m_set.end(); }
+
+        bool check_invariant() const;
+    };
+    
+};
+
+#endif