mirror of
https://github.com/Z3Prover/z3
synced 2025-08-17 08:42:15 +00:00
8757f04d20
* Add macro to disable linear solver for development * Move new_* and add_* to header * Add ref_vector_core::push_back(ref<T>&&) * Attempt to simplify lifetime handling * Make operator bool() explicit * clause improvements * display boolean assignment * clause::resolve * bug fixes * more fixes * final case of backtrack
42 lines
1.1 KiB
C++
42 lines
1.1 KiB
C++
/*++
|
|
Copyright (c) 2021 Microsoft Corporation
|
|
|
|
Module Name:
|
|
|
|
polysat var_constraint
|
|
|
|
Abstract:
|
|
|
|
Var constraints restrict viable values.
|
|
|
|
The main way var-constraints interact with the solver is to
|
|
narrow m_viable during initialization.
|
|
|
|
Author:
|
|
|
|
Nikolaj Bjorner (nbjorner) 2021-03-19
|
|
Jakob Rath 2021-04-6
|
|
|
|
--*/
|
|
#pragma once
|
|
#include "math/dd/dd_bdd.h"
|
|
#include "math/polysat/constraint.h"
|
|
|
|
|
|
namespace polysat {
|
|
|
|
class var_constraint : public constraint {
|
|
pvar m_var;
|
|
bdd m_viable;
|
|
public:
|
|
var_constraint(constraint_manager& m, unsigned lvl, csign_t sign, pvar v, bdd const & b, p_dependency_ref const& dep):
|
|
constraint(m, lvl, sign, dep, ckind_t::bit_t), m_var(v), m_viable(b) {}
|
|
~var_constraint() override {}
|
|
std::ostream& display(std::ostream& out) const override;
|
|
constraint_ref resolve(solver& s, pvar v) override;
|
|
void narrow(solver& s) override;
|
|
bool is_always_false() override;
|
|
bool is_currently_false(solver& s) override;
|
|
bool is_currently_true(solver& s) override;
|
|
};
|
|
}
|