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65 lines
1.4 KiB
C++
65 lines
1.4 KiB
C++
/*++
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Copyright (c) 2006 Microsoft Corporation
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Module Name:
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dl_rule_subsumption_index.h
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Abstract:
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Subsumption index for rules.
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Currently an underapproximation (fails to identify some subsumptions).
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Author:
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Krystof Hoder (t-khoder) 2011-10-10.
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Revision History:
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--*/
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#ifndef DL_RULE_SUBSUMPTION_INDEX_H_
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#define DL_RULE_SUBSUMPTION_INDEX_H_
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#include "dl_context.h"
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namespace datalog {
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class rule_subsumption_index {
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//private and undefined copy constroctor
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rule_subsumption_index(rule_subsumption_index const&);
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//private and undefined operator=
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rule_subsumption_index& operator=(rule_subsumption_index const&);
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typedef obj_hashtable<app> app_set;
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ast_manager & m;
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context & m_context;
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rule_ref_vector m_ref_holder;
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obj_map<func_decl, app_set *> m_unconditioned_heads;
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hashtable<rule *, rule_hash_proc, rule_eq_proc> m_rule_set;
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void handle_unconditioned_rule(rule * r);
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public:
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rule_subsumption_index(context & ctx) :
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m(ctx.get_manager()),
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m_context(ctx),
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m_ref_holder(ctx.get_rule_manager()) {}
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~rule_subsumption_index() {
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reset_dealloc_values(m_unconditioned_heads);
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}
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void add(rule * r);
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bool is_subsumed(rule * r);
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bool is_subsumed(app * query);
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};
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};
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#endif /* DL_RULE_SUBSUMPTION_INDEX_H_ */
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