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/****************************************************************************** |
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* Top contributors (to current version): |
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* Andrew Reynolds, Morgan Deters, Mathias Preiner |
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* |
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* This file is part of the cvc5 project. |
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* |
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* Copyright (c) 2009-2021 by the authors listed in the file AUTHORS |
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* in the top-level source directory and their institutional affiliations. |
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* All rights reserved. See the file COPYING in the top-level source |
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* directory for licensing information. |
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* **************************************************************************** |
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* |
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* Inst match class. |
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*/ |
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#include "cvc5_private.h" |
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#ifndef CVC5__THEORY__QUANTIFIERS__INST_MATCH_H |
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#define CVC5__THEORY__QUANTIFIERS__INST_MATCH_H |
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#include <vector> |
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#include "expr/node.h" |
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namespace cvc5 { |
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namespace theory { |
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namespace quantifiers { |
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class QuantifiersState; |
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/** Inst match |
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* |
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* This is the basic class specifying an instantiation. Its domain size (the |
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* size of d_vals) is the number of bound variables of the quantified formula |
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* that is passed to its constructor. |
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* |
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* The values of d_vals may be null, which indicate that the field has |
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* yet to be initialized. |
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*/ |
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class InstMatch { |
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public: |
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InstMatch(){} |
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explicit InstMatch(TNode q); |
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InstMatch( InstMatch* m ); |
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/* map from variable to ground terms */ |
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std::vector<Node> d_vals; |
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/** add match m |
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* |
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* This adds the initialized fields of m to this match for each field that is |
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* not already initialized in this match. |
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*/ |
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void add(InstMatch& m); |
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/** is this complete, i.e. are all fields non-null? */ |
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bool isComplete(); |
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/** is this empty, i.e. are all fields the null node? */ |
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bool empty(); |
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/** clear the instantiation, i.e. set all fields to the null node */ |
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void clear(); |
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/** debug print method */ |
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void debugPrint(const char* c); |
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/** to stream */ |
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inline void toStream(std::ostream& out) const { |
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out << "INST_MATCH( "; |
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bool printed = false; |
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for( unsigned i=0; i<d_vals.size(); i++ ){ |
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if( !d_vals[i].isNull() ){ |
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if( printed ){ out << ", "; } |
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out << i << " -> " << d_vals[i]; |
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printed = true; |
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} |
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} |
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out << " )"; |
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} |
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/** get the i^th term in the instantiation */ |
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Node get(size_t i) const; |
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/** set/overwrites the i^th field in the instantiation with n */ |
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void setValue(size_t i, TNode n); |
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/** set the i^th term in the instantiation to n |
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* |
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* This method returns true if the i^th field was previously uninitialized, |
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* or is equivalent to n modulo the equalities given by q. |
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*/ |
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bool set(QuantifiersState& qs, size_t i, TNode n); |
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}; |
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inline std::ostream& operator<<(std::ostream& out, const InstMatch& m) { |
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m.toStream(out); |
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return out; |
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} |
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} // namespace quantifiers |
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} // namespace theory |
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} // namespace cvc5 |
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#endif /* CVC5__THEORY__QUANTIFIERS__INST_MATCH_H */ |