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/********************* */
/*! \file quant_relevance.h
** \verbatim
** Top contributors (to current version):
** Andrew Reynolds
** This file is part of the CVC4 project.
** Copyright (c) 2009-2017 by the authors listed in the file AUTHORS
** in the top-level source directory) and their institutional affiliations.
** All rights reserved. See the file COPYING in the top-level source
** directory for licensing information.\endverbatim
**
** \brief quantifier relevance
**/
#include "cvc4_private.h"
#ifndef __CVC4__THEORY__QUANT_RELEVANCE_H
#define __CVC4__THEORY__QUANT_RELEVANCE_H
#include <map>
#include "theory/quantifiers/quant_util.h"
namespace CVC4 {
namespace theory {
namespace quantifiers {
/** QuantRelevance
*
* This class is used for implementing SinE-style heuristics
* (e.g. see Hoder et al. CADE 2011)
* This is enabled by the option --relevant-triggers.
*/
class QuantRelevance : public QuantifiersUtil
{
public:
/** constructor
* cr is whether relevance is computed by this class.
* if this is false, then all calls to getRelevance
* return -1.
*/
QuantRelevance(bool cr) : d_computeRel(cr) {}
~QuantRelevance() {}
/** reset */
bool reset(Theory::Effort e) override { return true; }
/** register quantifier */
void registerQuantifier(Node q) override;
/** identify */
std::string identify() const override { return "QuantRelevance"; }
/** set relevance of symbol s to r */
void setRelevance(Node s, int r);
/** get relevance of symbol s */
int getRelevance(Node s)
{
return d_relevance.find(s) == d_relevance.end() ? -1 : d_relevance[s];
}
/** get number of quantifiers for symbol s */
unsigned getNumQuantifiersForSymbol(Node s)
{
return d_syms_quants[s].size();
}
private:
/** for computing relevance */
bool d_computeRel;
/** map from quantifiers to symbols they contain */
std::map<Node, std::vector<Node> > d_syms;
/** map from symbols to quantifiers */
std::map<Node, std::vector<Node> > d_syms_quants;
/** relevance for quantifiers and symbols */
std::map<Node, int> d_relevance;
/** compute symbols */
void computeSymbols(Node n, std::vector<Node>& syms);
};
} /* CVC4::theory::quantifiers namespace */
} /* CVC4::theory namespace */
} /* CVC4 namespace */
#endif /* __CVC4__THEORY__QUANT_RELEVANCE_H */
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