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https://github.com/Z3Prover/z3
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130 lines
3.8 KiB
C++
130 lines
3.8 KiB
C++
/*++
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Copyright (c) 2012 Microsoft Corporation
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Module Name:
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rel_context.h
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Abstract:
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context for relational datalog engine.
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Author:
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Nikolaj Bjorner (nbjorner) 2012-12-3.
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Revision History:
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Extracted from dl_context
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--*/
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#ifndef REL_CONTEXT_H_
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#define REL_CONTEXT_H_
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#include "ast.h"
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#include "dl_relation_manager.h"
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#include "dl_instruction.h"
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#include "dl_engine_base.h"
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#include "dl_context.h"
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#include "lbool.h"
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namespace datalog {
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class context;
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typedef vector<std::pair<func_decl*,relation_fact> > fact_vector;
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class rel_context : public rel_context_base {
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context& m_context;
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ast_manager& m;
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relation_manager m_rmanager;
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expr_ref m_answer;
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relation_base * m_last_result_relation;
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fact_vector m_table_facts;
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execution_context m_ectx;
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instruction_block m_code;
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double m_sw;
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class scoped_query;
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void reset_negated_tables();
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relation_plugin & get_ordinary_relation_plugin(symbol relation_name);
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lbool saturate(scoped_query& sq);
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void setup_default_relation();
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public:
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rel_context(context& ctx);
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virtual ~rel_context();
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virtual relation_manager & get_rmanager();
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virtual const relation_manager & get_rmanager() const;
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ast_manager& get_manager() const { return m; }
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context& get_context() const { return m_context; }
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virtual relation_base & get_relation(func_decl * pred);
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virtual relation_base * try_get_relation(func_decl * pred) const;
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virtual bool is_empty_relation(func_decl* pred) const;
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virtual expr_ref try_get_formula(func_decl * pred) const;
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virtual expr_ref get_answer() { return m_answer; }
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virtual bool output_profile() const;
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virtual lbool query(expr* q);
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virtual lbool query(unsigned num_rels, func_decl * const* rels);
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virtual void set_predicate_representation(func_decl * pred, unsigned relation_name_cnt,
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symbol const * relation_names);
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virtual void inherit_predicate_kind(func_decl* new_pred, func_decl* orig_pred);
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virtual void collect_statistics(statistics& st) const;
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virtual void updt_params();
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/**
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\brief Restrict the set of used predicates to \c res.
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The function deallocates unsused relations, it does not deal with rules.
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*/
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virtual void restrict_predicates(func_decl_set const& predicates);
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virtual void transform_rules();
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virtual bool try_get_size(func_decl* pred, unsigned& rel_size) const;
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/**
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\brief query result if it contains fact.
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*/
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virtual bool result_contains_fact(relation_fact const& f);
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virtual void collect_non_empty_predicates(func_decl_set& ps) {
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return get_rmanager().collect_non_empty_predicates(ps);
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}
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/** \brief add facts to relation
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*/
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virtual void add_fact(func_decl* pred, relation_fact const& fact);
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virtual void add_fact(func_decl* pred, table_fact const& fact);
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/** \brief check if facts were added to relation
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*/
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virtual bool has_facts(func_decl * pred) const;
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/**
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\brief Store the relation \c rel under the predicate \c pred. The \c context object
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takes over the ownership of the relation object.
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*/
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virtual void store_relation(func_decl * pred, relation_base * rel);
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virtual void display_output_facts(rule_set const& rules, std::ostream & out) const;
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virtual void display_facts(std::ostream & out) const;
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virtual void display_profile(std::ostream& out);
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virtual lbool saturate();
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};
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};
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#endif /* REL_CONTEXT_H_ */
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