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/********************* */
/*! \file projections.h
** \verbatim
** Top contributors (to current version):
** Gereon Kremer
** This file is part of the CVC4 project.
** Copyright (c) 2009-2021 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 Implements utilities for CAD projection operators.
**
** Implements utilities for CAD projection operators.
**/
#include "cvc4_private.h"
#ifndef CVC4__THEORY__ARITH__NL__CAD_PROJECTIONS_H
#define CVC4__THEORY__ARITH__NL__CAD_PROJECTIONS_H
#ifdef CVC4_USE_POLY
#include <poly/polyxx.h>
#include <vector>
namespace CVC5 {
namespace theory {
namespace arith {
namespace nl {
namespace cad {
/**
* A simple wrapper around std::vector<poly::Polynomial> that ensures that all
* polynomials are properly factorized and pruned when added to the list.
*/
class PolyVector : public std::vector<poly::Polynomial>
{
private:
/** Disable all emplace() */
void emplace() {}
/** Disable all emplace_back() */
void emplace_back() {}
/** Disable all insert() */
void insert() {}
/** Disable all push_back() */
void push_back() {}
public:
PolyVector() {}
/** Construct from a set of polynomials */
PolyVector(std::initializer_list<poly::Polynomial> i)
{
for (const auto& p : i) add(p);
}
/**
* Adds a polynomial to the list of projection polynomials.
* Before adding, it factorizes the polynomials and removed constant factors.
*/
void add(const poly::Polynomial& poly, bool assertMain = false);
/** Sort and remove duplicates from the list of polynomials. */
void reduce();
/** Make this list of polynomials a finest square-free basis. */
void makeFinestSquareFreeBasis();
/** Push polynomials with a lower main variable to another PolyVector. */
void pushDownPolys(PolyVector& down, poly::Variable var);
};
/**
* Computes McCallum's projection operator.
*/
PolyVector projectionMcCallum(const std::vector<poly::Polynomial>& polys);
} // namespace cad
} // namespace nl
} // namespace arith
} // namespace theory
} // namespace CVC5
#endif
#endif
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