z3-z3-4.12.6.src.sat.smt.ba_xor.h Maven / Gradle / Ivy
/*++
Copyright (c) 2017 Microsoft Corporation
Module Name:
ba_xor.h
Abstract:
Interface for Xor constraints.
Author:
Nikolaj Bjorner (nbjorner) 2017-01-30
--*/
#pragma once
#include "sat/sat_types.h"
#include "sat/smt/ba_constraint.h"
namespace ba {
class xr : public constraint {
literal m_lits[0];
public:
static size_t get_obj_size(unsigned num_lits) { return sat::constraint_base::obj_size(sizeof(xr) + num_lits * sizeof(literal)); }
xr(unsigned id, literal_vector const& lits);
literal operator[](unsigned i) const { return m_lits[i]; }
literal const* begin() const { return m_lits; }
literal const* end() const { return begin() + m_size; }
void negate() override { m_lits[0].neg(); }
void swap(unsigned i, unsigned j) override { std::swap(m_lits[i], m_lits[j]); }
bool is_watching(literal l) const override;
literal_vector literals() const override { return literal_vector(size(), begin()); }
literal get_lit(unsigned i) const override { return m_lits[i]; }
void set_lit(unsigned i, literal l) override { m_lits[i] = l; }
bool well_formed() const override;
void clear_watch(solver_interface& s) override;
bool init_watch(solver_interface& s) override;
std::ostream& display(std::ostream& out) const override;
std::ostream& display(std::ostream& out, solver_interface const& s, bool values) const override;
bool parity(solver_interface const& s, unsigned offset) const;
bool validate_unit_propagation(solver_interface const& s, literal alit) const override;
lbool eval(sat::model const& m) const override;
lbool eval(solver_interface const& s) const override;
void init_use_list(sat::ext_use_list& ul) const override;
bool is_blocked(sat::simplifier& s, literal lit) const override { return false; }
};
}