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69 lines
1.8 KiB
C++
69 lines
1.8 KiB
C++
/*++
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Copyright (c) 2007 Microsoft Corporation
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Module Name:
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nnf.h
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Abstract:
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Negation Normal Form & Skolemization
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Author:
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Leonardo (leonardo) 2008-01-11
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Notes:
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Major revision on 2011-10-06
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--*/
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#ifndef _NNF_H_
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#define _NNF_H_
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#include"ast.h"
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#include"nnf_params.h"
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#include"params.h"
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#include"defined_names.h"
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class nnf {
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struct imp;
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imp * m_imp;
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public:
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nnf(ast_manager & m, defined_names & n, params_ref const & p = params_ref());
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nnf(ast_manager & m, defined_names & n, nnf_params & params); // for backward compatibility
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~nnf();
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void operator()(expr * n, // [IN] expression that should be put into NNF
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expr_ref_vector & new_defs, // [OUT] new definitions
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proof_ref_vector & new_def_proofs, // [OUT] proofs of the new definitions
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expr_ref & r, // [OUT] resultant expression
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proof_ref & p // [OUT] proof for (~ n r)
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);
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void updt_params(params_ref const & p);
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static void get_param_descrs(param_descrs & r);
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void cancel() { set_cancel(true); }
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void reset_cancel() { set_cancel(false); }
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void set_cancel(bool f);
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void reset();
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void reset_cache();
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};
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// Old strategy framework
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class assertion_set_strategy;
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// Skolem Normal Form
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assertion_set_strategy * mk_snf(params_ref const & p = params_ref());
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// Negation Normal Form
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assertion_set_strategy * mk_nnf(params_ref const & p = params_ref());
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// New strategy framework
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class tactic;
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// Skolem Normal Form
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tactic * mk_snf_tactic(ast_manager & m, params_ref const & p = params_ref());
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// Negation Normal Form
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tactic * mk_nnf_tactic(ast_manager & m, params_ref const & p = params_ref());
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#endif /* _NNF_H_ */
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