mirrors/z3
3
0
Fork 0
mirror of https://github.com/Z3Prover/z3 synced 2025-05-18 05:04:45 +00:00
Code Activity

rename to op-constraint to give space for other operations

Browse source 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2021-12-15 09:20:11 -08:00
parent bc1e44ab71
commit a2aa1170f9
8 changed files with 77 additions and 54 deletions
Download patch file Download diff file Expand all files Collapse all files

60
src/math/polysat/op_constraint.h Normal file
View file

@ -0,0 +1,60 @@
/*++
Copyright (c) 2021 Microsoft Corporation
Module Name:
Op constraint.
lshr: r == p >> q
ashr: r == p >> q
lshl: r == p << q
and: r == p & q
or: r == p | q
neg: r == ~p
xor: r == p ^ q
Author:
Jakob Rath, Nikolaj Bjorner (nbjorner) 2021-12-09
--*/
#pragma once
#include "math/polysat/constraint.h"
namespace polysat {
class op_constraint final : public constraint {
public:
enum class code { lshr_op, ashr_op, shl_op, and_op, or_op, xor_op, not_op };
protected:
friend class constraint_manager;
code m_op;
pdd m_p;
pdd m_q;
pdd m_r;
op_constraint(constraint_manager& m, code c, pdd const& p, pdd const& q, pdd const& r);
void simplify() {}
bool is_always_false(bool is_positive, pdd const& p, pdd const& q, pdd const& r) const;
bool is_always_true(bool is_positive, pdd const& p, pdd const& q, pdd const& r) const;
lbool eval(pdd const& p, pdd const& q, pdd const& r) const;
public:
~op_constraint() override {}
pdd const& p() const { return m_p; }
pdd const& q() const { return m_q; }
pdd const& r() const { return m_r; }
std::ostream& display(std::ostream& out, lbool status) const override;
std::ostream& display(std::ostream& out) const override;
bool is_always_false(bool is_positive) const override;
bool is_currently_false(assignment_t const& a, bool is_positive) const override;
bool is_currently_true(assignment_t const& a, bool is_positive) const override;
void narrow(solver& s, bool is_positive) override;
inequality as_inequality(bool is_positive) const override { throw default_exception("is not an inequality"); }
unsigned hash() const override;
bool operator==(constraint const& other) const override;
bool is_eq() const override { return false; }
};
}