consolidate rule checking in separate class

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

src/muz/base/rule_properties.h

@@ -0,0 +1,60 @@
+/*++
+Copyright (c) 2013 Microsoft Corporation
+
+Module Name:
+
+    rule_properties.h
+
+Abstract:
+
+    Collect properties of rules.
+
+Author:
+
+    Nikolaj Bjorner (nbjorner) 9-25-2014
+
+Notes:
+    
+
+--*/
+
+#ifndef _RULE_PROPERTIES_H_
+#define _RULE_PROPERTIES_H_
+
+#include"ast.h"
+#include"datatype_decl_plugin.h"
+#include"dl_rule.h"
+
+namespace datalog {
+    class rule_properties {
+        ast_manager&  m;
+        rule_manager& rm;
+        context&      m_ctx;
+        i_expr_pred&  m_is_predicate;
+        datatype_util m_dt;
+        bool          m_generate_proof;
+        rule*         m_rule;
+        obj_map<quantifier, rule*> m_quantifiers;
+        obj_map<func_decl, rule*>  m_uninterp_funs;
+        ptr_vector<rule>           m_interp_pred;
+        ptr_vector<rule>           m_negative_rules;
+
+        void insert(ptr_vector<rule>& rules, rule* r);
+    public:
+        rule_properties(ast_manager & m, rule_manager& rm, context& ctx, i_expr_pred& is_predicate);
+        ~rule_properties();    
+        void set_generate_proof(bool generate_proof) { m_generate_proof = generate_proof; } 
+        void collect(rule_set const& r);
+        void check_quantifier_free();
+        void check_uninterpreted_free();
+        void check_existential_tail();
+        void check_for_negated_predicates();
+        void check_nested_free();
+        void operator()(var* n);
+        void operator()(quantifier* n);
+        void operator()(app* n);
+        void reset();
+    };
+}
+
+#endif /* _RULE_PROPERTIES_H_ */