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43 lines
691 B
C++
43 lines
691 B
C++
/*++
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Copyright (c) 2006 Microsoft Corporation
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Module Name:
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lbool.h
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Abstract:
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Lifted boolean
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Author:
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Leonardo de Moura (leonardo) 2008-02-08.
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Revision History:
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--*/
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#ifndef _LBOOL_H_
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#define _LBOOL_H_
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#include"util.h"
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typedef enum { l_false = -1, l_undef, l_true } lbool;
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inline lbool operator~(lbool lb) {
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return static_cast<lbool>(-static_cast<int>(lb));
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}
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inline lbool to_lbool(bool b) {
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return static_cast<lbool>(static_cast<int>(b)*2-1);
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}
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std::ostream & operator<<(std::ostream & out, lbool b);
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/**
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\brief Convert l_true -> satisfiable, l_false -> unsatisfiable, and l_undef -> unknown.
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*/
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char const * to_sat_str(lbool l);
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#endif /* _LBOOL_H_ */
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