/usr/include/polybori/BooleVariable.h is in libbrial-dev 0.8.5-4.
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//*****************************************************************************
/** @file BooleVariable.h
*
* @author Alexander Dreyer
* @date 2006-03-10
*
* This file carries the definition of class @c BooleVariable, which can be used
* to access the boolean variables of the currently active Boolean polynomial
* ring.
*
* @par Copyright:
* (c) 2006-2010 by The PolyBoRi Team
*
**/
//*****************************************************************************
#ifndef polybori_BooleVariable_h_
#define polybori_BooleVariable_h_
// include basic definitions
#include <polybori/pbori_defs.h>
// get BoolePolynomial's definition
#include <polybori/BooleEnv.h>
#include <polybori/BoolePolynomial.h>
#include <polybori/BooleSet.h>
BEGIN_NAMESPACE_PBORI
/** @class BooleVariable
* @brief This class is just a wrapper for using variables from @c cudd's
* decicion diagram.
*
* @note @c BooleVariable is actually a specialization of @c BoolePolynomial
* with a special constructor.
*
**/
class BooleVariable:
public CAuxTypes {
/// Generic access to current type
typedef BooleVariable self;
public:
/// Type of sets of Boolean variables
typedef BooleSet set_type;
/// Type for Boolean polynomial rings (without ordering)
typedef BoolePolyRing ring_type;
/// Constructor idx-th variable of active ring
/**
explicit BooleVariable(idx_type idx = 0):
m_poly( BooleEnv::ring().variable(idx) ) {}
**/
/// Construct idx-th variable of a given ring
BooleVariable(idx_type idx, const ring_type& ring):
m_poly( ring.variableDiagram(idx) ) {}
/// Construct first variable of a given ring
BooleVariable(const ring_type& ring):
m_poly( ring.variableDiagram(0) ) {}
/// Copy constructor
BooleVariable(const self& rhs):
m_poly(rhs.m_poly) {}
/// Cast to polynomial type
operator const BoolePolynomial&() const { return m_poly; }
/// Get index of the variable
idx_type index() const { return *m_poly.firstBegin(); }
/// Equality check
bool operator== (const self& other) const{
return m_poly==other.m_poly;
}
// Nonequality check
bool operator!= (const self& other) const{
return m_poly!=other.m_poly;
}
/// Hash value of the variable
hash_type stableHash() const{ return m_poly.stableHash(); }
/// Get unique hash value (valid only per runtime)
hash_type hash() const { return m_poly.hash(); }
/// Convert to Boolean set
set_type set() const { return m_poly.set(); }
/// Access ring, where this belongs to
const ring_type& ring() const { return m_poly.ring(); }
private:
friend class BoolePolyRing;
BooleVariable(const BoolePolynomial& poly):m_poly(poly){}
BoolePolynomial m_poly;
};
/// Division
inline BoolePolynomial
operator/(const BooleVariable& lhs, const BooleVariable& rhs) {
return BoolePolynomial(BooleConstant(lhs == rhs), lhs.ring());
}
END_NAMESPACE_PBORI
#endif // of polybori_BooleVariable_h_
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