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/********************* */
/*! \file result.h
** \verbatim
** Original author: mdeters
** Major contributors: none
** Minor contributors (to current version): none
** This file is part of the CVC4 prototype.
** Copyright (c) 2009, 2010 The Analysis of Computer Systems Group (ACSys)
** Courant Institute of Mathematical Sciences
** New York University
** See the file COPYING in the top-level source directory for licensing
** information.\endverbatim
**
** \brief Encapsulation of the result of a query.
**
** Encapsulation of the result of a query.
**/
#include "cvc4_public.h"
#ifndef __CVC4__RESULT_H
#define __CVC4__RESULT_H
#include "util/Assert.h"
namespace CVC4 {
// TODO: perhaps best to templatize Result on its Kind (SAT/Validity),
// but this requires doing the same for Prover and needs discussion.
// TODO: subclass to provide models, etc. This is really just
// intended as a three-valued response code.
/**
* Three-valued, immutable SMT result, with optional explanation.
*/
class CVC4_PUBLIC Result {
public:
enum SAT {
UNSAT = 0,
SAT = 1,
SAT_UNKNOWN = 2
};
enum Validity {
INVALID = 0,
VALID = 1,
VALIDITY_UNKNOWN = 2
};
enum UnknownExplanation {
REQUIRES_FULL_CHECK,
INCOMPLETE,
TIMEOUT,
BAIL,
OTHER
};
private:
enum SAT d_sat;
enum Validity d_validity;
enum { TYPE_SAT, TYPE_VALIDITY, TYPE_NONE } d_which;
friend std::ostream& CVC4::operator<<(std::ostream& out, Result r);
public:
Result() :
d_sat(SAT_UNKNOWN),
d_validity(VALIDITY_UNKNOWN),
d_which(TYPE_NONE) {
}
Result(enum SAT s) :
d_sat(s),
d_validity(VALIDITY_UNKNOWN),
d_which(TYPE_SAT) {
}
Result(enum Validity v) :
d_sat(SAT_UNKNOWN),
d_validity(v),
d_which(TYPE_VALIDITY) {
}
enum SAT isSAT() {
return d_which == TYPE_SAT ? d_sat : SAT_UNKNOWN;
}
enum Validity isValid() {
return d_which == TYPE_VALIDITY ? d_validity : VALIDITY_UNKNOWN;
}
enum UnknownExplanation whyUnknown();
inline Result asSatisfiabilityResult() const;
inline Result asValidityResult() const;
};/* class Result */
inline Result Result::asSatisfiabilityResult() const {
if(d_which == TYPE_SAT) {
return *this;
}
switch(d_validity) {
case INVALID:
return Result(SAT);
case VALID:
return Result(UNSAT);
case VALIDITY_UNKNOWN:
return Result(SAT_UNKNOWN);
default:
Unhandled(d_validity);
}
}
inline Result Result::asValidityResult() const {
if(d_which == TYPE_VALIDITY) {
return *this;
}
switch(d_sat) {
case SAT:
return Result(INVALID);
case UNSAT:
return Result(VALID);
case SAT_UNKNOWN:
return Result(VALIDITY_UNKNOWN);
default:
Unhandled(d_sat);
}
}
inline std::ostream& operator<<(std::ostream& out, Result r) {
if(r.d_which == Result::TYPE_SAT) {
switch(r.d_sat) {
case Result::UNSAT: out << "UNSAT"; break;
case Result::SAT: out << "SAT"; break;
case Result::SAT_UNKNOWN: out << "SAT_UNKNOWN"; break;
}
} else {
switch(r.d_validity) {
case Result::INVALID: out << "INVALID"; break;
case Result::VALID: out << "VALID"; break;
case Result::VALIDITY_UNKNOWN: out << "VALIDITY_UNKNOWN"; break;
}
}
return out;
}
}/* CVC4 namespace */
#endif /* __CVC4__RESULT_H */
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