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/********************* */
/*! \file boolean_terms.h
** \verbatim
** Original author: mdeters
** Major contributors: none
** Minor contributors (to current version): none
** This file is part of the CVC4 prototype.
** Copyright (c) 2009-2012 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 [[ Add one-line brief description here ]]
**
** [[ Add lengthier description here ]]
** \todo document this file
**/
#include "cvc4_private.h"
#pragma once
#include "expr/attribute.h"
#include "expr/node.h"
#include "util/hash.h"
#include <map>
#include <utility>
namespace CVC4 {
namespace smt {
namespace attr {
struct BooleanTermAttrTag { };
}/* CVC4::smt::attr namespace */
typedef expr::Attribute<attr::BooleanTermAttrTag, Node> BooleanTermAttr;
class BooleanTermConverter {
/** The type of the Boolean term conversion cache */
typedef std::hash_map< std::pair<Node, bool>, Node,
PairHashFunction< Node, bool,
NodeHashFunction, std::hash<int> > > BooleanTermCache;
/** The SmtEngine to which we're associated */
SmtEngine& d_smt;
/** The cache used during Boolean term conversion */
BooleanTermCache d_booleanTermCache;
/**
* Scan a datatype for and convert as necessary.
*/
const Datatype& booleanTermsConvertDatatype(const Datatype& dt) throw();
Node rewriteBooleanTermsRec(TNode n, bool boolParent, std::map<TNode, Node>& quantBoolVars) throw();
public:
BooleanTermConverter(SmtEngine& smt) :
d_smt(smt) {
}
/**
* We rewrite Boolean terms in assertions as bitvectors of length 1.
*/
Node rewriteBooleanTerms(TNode n, bool boolParent = true) throw() {
std::map<TNode, Node> quantBoolVars;
return rewriteBooleanTermsRec(n, boolParent, quantBoolVars);
}
};/* class BooleanTermConverter */
}/* CVC4::smt namespace */
}/* CVC4 namespace */
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