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/********************* */
/*! \file valuation.cpp
** \verbatim
** Original author: Morgan Deters
** Major contributors: Dejan Jovanovic
** Minor contributors (to current version): Andrew Reynolds, Clark Barrett, Tim King
** This file is part of the CVC4 project.
** Copyright (c) 2009-2013 New York University and The University of Iowa
** See the file COPYING in the top-level source directory for licensing
** information.\endverbatim
**
** \brief A "valuation" proxy for TheoryEngine
**
** Implementation of Valuation class.
**/
#include "expr/node.h"
#include "theory/valuation.h"
#include "theory/theory_engine.h"
#include "theory/rewriter.h"
namespace CVC4 {
namespace theory {
bool equalityStatusCompatible(EqualityStatus s1, EqualityStatus s2) {
switch (s1) {
case EQUALITY_TRUE:
case EQUALITY_TRUE_IN_MODEL:
case EQUALITY_TRUE_AND_PROPAGATED:
switch (s2) {
case EQUALITY_TRUE:
case EQUALITY_TRUE_IN_MODEL:
case EQUALITY_TRUE_AND_PROPAGATED:
return true;
default:
return false;
}
break;
case EQUALITY_FALSE:
case EQUALITY_FALSE_IN_MODEL:
case EQUALITY_FALSE_AND_PROPAGATED:
switch (s2) {
case EQUALITY_FALSE:
case EQUALITY_FALSE_IN_MODEL:
case EQUALITY_FALSE_AND_PROPAGATED:
return true;
default:
return false;
}
break;
default:
return false;
}
}
bool Valuation::isSatLiteral(TNode n) const {
return d_engine->getPropEngine()->isSatLiteral(n);
}
Node Valuation::getSatValue(TNode n) const {
if(n.getKind() == kind::NOT) {
Node atomRes = d_engine->getPropEngine()->getValue(n[0]);
if(atomRes.getKind() == kind::CONST_BOOLEAN) {
return NodeManager::currentNM()->mkConst(!atomRes.getConst<bool>());
} else {
Assert(atomRes.isNull());
return atomRes;
}
} else {
return d_engine->getPropEngine()->getValue(n);
}
}
bool Valuation::hasSatValue(TNode n, bool& value) const {
if (d_engine->getPropEngine()->isSatLiteral(n)) {
return d_engine->getPropEngine()->hasValue(n, value);
} else {
return false;
}
}
EqualityStatus Valuation::getEqualityStatus(TNode a, TNode b) {
return d_engine->getEqualityStatus(a, b);
}
Node Valuation::getModelValue(TNode var) {
return d_engine->getModelValue(var);
}
Node Valuation::ensureLiteral(TNode n) {
Debug("ensureLiteral") << "rewriting: " << n << std::endl;
Node rewritten = Rewriter::rewrite(n);
Debug("ensureLiteral") << " got: " << rewritten << std::endl;
Node preprocessed = d_engine->preprocess(rewritten);
Debug("ensureLiteral") << "preproced: " << preprocessed << std::endl;
d_engine->getPropEngine()->ensureLiteral(preprocessed);
return preprocessed;
}
bool Valuation::isDecision(Node lit) const {
return d_engine->getPropEngine()->isDecision(lit);
}
unsigned Valuation::getAssertionLevel() const{
return d_engine->getPropEngine()->getAssertionLevel();
}
}/* CVC4::theory namespace */
}/* CVC4 namespace */
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