user_propagator_base Class Reference

#include <z3++.h>

Public Member Functions
	user_propagator_base (context &c)
	user_propagator_base (solver *s)
virtual void	push ()=0
virtual void	pop (unsigned num_scopes)=0
virtual	~user_propagator_base ()
context &	ctx ()
virtual user_propagator_base *	fresh (context &ctx)=0
	user_propagators created using fresh() are created during search and their lifetimes are restricted to search time. They should be garbage collected by the propagator used to invoke fresh(). The life-time of the Z3_context object can only be assumed valid during callbacks, such as fixed(), which contains expressions based on the context.
void	register_fixed (fixed_eh_t &f)
	register callbacks. Callbacks can only be registered with user_propagators that were created using a solver.
void	register_fixed ()
void	register_eq (eq_eh_t &f)
void	register_eq ()
void	register_final (final_eh_t &f)
	register a callback on final-check. During the final check stage, all propagations have been processed. This is an opportunity for the user-propagator to delay some analysis that could be expensive to perform incrementally. It is also an opportunity for the propagator to implement branch and bound optimization.
void	register_final ()
void	register_created (created_eh_t &c)
void	register_created ()
void	register_decide (decide_eh_t &c)
void	register_decide ()
void	register_on_binding ()
virtual void	fixed (expr const &, expr const &)
virtual void	eq (expr const &, expr const &)
virtual void	final ()
virtual void	created (expr const &)
virtual void	decide (expr const &, unsigned, bool)
virtual bool	on_binding (expr const &, expr const &)
bool	next_split (expr const &e, unsigned idx, Z3_lbool phase)
void	add (expr const &e)
	tracks e by a unique identifier that is returned by the call.
void	conflict (expr_vector const &fixed)
void	conflict (expr_vector const &fixed, expr_vector const &lhs, expr_vector const &rhs)
bool	propagate (expr_vector const &fixed, expr const &conseq)
bool	propagate (expr_vector const &fixed, expr_vector const &lhs, expr_vector const &rhs, expr const &conseq)

Detailed Description

Definition at line 4739 of file z3++.h.

Constructor & Destructor Documentation

user_propagator_base() [1/2]

user_propagator_base ( context & c )

inline

Definition at line 4834 of file z3++.h.

: s(nullptr), c(&c) {}

Referenced by fresh().

user_propagator_base() [2/2]

user_propagator_base ( solver * s )

inline

Definition at line 4836 of file z3++.h.

                                       : s(s), c(nullptr) {
            Z3_solver_propagate_init(ctx(), *s, this, push_eh, pop_eh, fresh_eh);
        }

~user_propagator_base()

virtual ~user_propagator_base ( )

inlinevirtual

Definition at line 4843 of file z3++.h.

                                        {
            for (auto& subcontext : subcontexts) {
                subcontext->detach(); // detach first; the subcontexts will be freed internally!
                delete subcontext;
            }
        }

Member Function Documentation

add()

void add ( expr const & e )

inline

tracks e by a unique identifier that is returned by the call.

If the fixed() callback is registered and if e is a Boolean or Bit-vector, the fixed() callback gets invoked when e is bound to a value. If the eq() callback is registered, then equalities between registered expressions are reported. A consumer can use the propagate or conflict functions to invoke propagations or conflicts as a consequence of these callbacks. These functions take a list of identifiers for registered expressions that have been fixed. The list of identifiers must correspond to already fixed values. Similarly, a list of propagated equalities can be supplied. These must correspond to equalities that have been registered during a callback.

Definition at line 4997 of file z3++.h.

                                {
            if (cb)
                Z3_solver_propagate_register_cb(ctx(), cb, e);
            else if (s)
                Z3_solver_propagate_register(ctx(), *s, e);
            else
                assert(false);
        }

conflict() [1/2]

void conflict ( expr_vector const & fixed )

inline

Definition at line 5006 of file z3++.h.

                                                {
            assert(cb);
            expr conseq = ctx().bool_val(false);
            array<Z3_ast> _fixed(fixed);
            Z3_solver_propagate_consequence(ctx(), cb, fixed.size(), _fixed.ptr(), 0, nullptr, nullptr, conseq);
        }

conflict() [2/2]

void conflict ( expr_vector const & fixed, expr_vector const & lhs, expr_vector const & rhs )

inline

Definition at line 5013 of file z3++.h.

                                                                                                {
            assert(cb);
            assert(lhs.size() == rhs.size());
            expr conseq = ctx().bool_val(false);
            array<Z3_ast> _fixed(fixed);
            array<Z3_ast> _lhs(lhs);
            array<Z3_ast> _rhs(rhs);
            Z3_solver_propagate_consequence(ctx(), cb, fixed.size(), _fixed.ptr(), lhs.size(), _lhs.ptr(), _rhs.ptr(), conseq);
        }

created()

virtual void created ( expr const & )

inlinevirtual

Definition at line 4972 of file z3++.h.

{}

Referenced by register_created().

ctx()

context & ctx ( )

inline

Definition at line 4850 of file z3++.h.

                       {
            return c ? *c : s->ctx();
        }

Referenced by add(), conflict(), conflict(), fresh(), next_split(), propagate(), propagate(), register_created(), register_created(), register_decide(), register_decide(), register_eq(), register_eq(), register_final(), register_final(), register_fixed(), register_fixed(), register_on_binding(), and user_propagator_base().

decide()

virtual void decide ( expr const & , unsigned , bool  )

inlinevirtual

Definition at line 4974 of file z3++.h.

{}

Referenced by register_decide().

eq()

virtual void eq ( expr const & , expr const &  )

inlinevirtual

Definition at line 4968 of file z3++.h.

{ }

Referenced by register_eq().

final()

virtual void final ( )

inlinevirtual

Definition at line 4970 of file z3++.h.

{ }

fixed()

virtual void fixed ( expr const & , expr const &  )

inlinevirtual

Definition at line 4966 of file z3++.h.

{ }

Referenced by conflict(), conflict(), propagate(), propagate(), and register_fixed().

fresh()

virtual user_propagator_base * fresh ( context & ctx )

pure virtual

user_propagators created using fresh() are created during search and their lifetimes are restricted to search time. They should be garbage collected by the propagator used to invoke fresh(). The life-time of the Z3_context object can only be assumed valid during callbacks, such as fixed(), which contains expressions based on the context.

next_split()

bool next_split ( expr const & e, unsigned idx, Z3_lbool phase )

inline

Definition at line 4978 of file z3++.h.

                                                                     {
            assert(cb);
            return Z3_solver_next_split(ctx(), cb, e, idx, phase);
        }

on_binding()

virtual bool on_binding ( expr const & , expr const &  )

inlinevirtual

Definition at line 4976 of file z3++.h.

{ return true; }

Referenced by register_on_binding().

pop()

virtual void pop ( unsigned num_scopes )

pure virtual

propagate() [1/2]

bool propagate ( expr_vector const & fixed, expr const & conseq )

inline

Definition at line 5023 of file z3++.h.

                                                                     {
            assert(cb);
            assert((Z3_context)conseq.ctx() == (Z3_context)ctx());
            array<Z3_ast> _fixed(fixed);
            return Z3_solver_propagate_consequence(ctx(), cb, _fixed.size(), _fixed.ptr(), 0, nullptr, nullptr, conseq);
        }

propagate() [2/2]

bool propagate ( expr_vector const & fixed, expr_vector const & lhs, expr_vector const & rhs, expr const & conseq )

inline

Definition at line 5030 of file z3++.h.

                                           {
            assert(cb);
            assert((Z3_context)conseq.ctx() == (Z3_context)ctx());
            assert(lhs.size() == rhs.size());
            array<Z3_ast> _fixed(fixed);
            array<Z3_ast> _lhs(lhs);
            array<Z3_ast> _rhs(rhs);
            
            return Z3_solver_propagate_consequence(ctx(), cb, _fixed.size(), _fixed.ptr(), lhs.size(), _lhs.ptr(), _rhs.ptr(), conseq);
        }

push()

virtual void push ( )

pure virtual

register_created() [1/2]

void register_created ( )

inline

Definition at line 4933 of file z3++.h.

                                {
            m_created_eh = [this](expr const& e) {
                created(e);
            };
            if (s) {
                Z3_solver_propagate_created(ctx(), *s, created_eh);
            }
        }

register_created() [2/2]

void register_created ( created_eh_t & c )

inline

Definition at line 4926 of file z3++.h.

                                               {
            m_created_eh = c;
            if (s) {
                Z3_solver_propagate_created(ctx(), *s, created_eh);
            }
        }

register_decide() [1/2]

void register_decide ( )

inline

Definition at line 4949 of file z3++.h.

                               {
            m_decide_eh = [this](expr val, unsigned bit, bool is_pos) {
                decide(val, bit, is_pos);
            };
            if (s) {
                Z3_solver_propagate_decide(ctx(), *s, decide_eh);
            }
        }

register_decide() [2/2]

void register_decide ( decide_eh_t & c )

inline

Definition at line 4942 of file z3++.h.

                                             {
            m_decide_eh = c;
            if (s) {
                Z3_solver_propagate_decide(ctx(), *s, decide_eh);
            }
        }

register_eq() [1/2]

void register_eq ( )

inline

Definition at line 4893 of file z3++.h.

                           {
            m_eq_eh = [this](expr const& x, expr const& y) {
                eq(x, y);
            };
            if (s) {
                Z3_solver_propagate_eq(ctx(), *s, eq_eh);
            }
        }

register_eq() [2/2]

void register_eq ( eq_eh_t & f )

inline

Definition at line 4886 of file z3++.h.

                                     {
            m_eq_eh = f;
            if (s) {
                Z3_solver_propagate_eq(ctx(), *s, eq_eh);
            }
        }

register_final() [1/2]

void register_final ( )

inline

Definition at line 4917 of file z3++.h.

                              {
            m_final_eh = [this]() {
                final();
            };
            if (s) {
                Z3_solver_propagate_final(ctx(), *s, final_eh);
            }
        }

register_final() [2/2]

void register_final ( final_eh_t & f )

inline

register a callback on final-check. During the final check stage, all propagations have been processed. This is an opportunity for the user-propagator to delay some analysis that could be expensive to perform incrementally. It is also an opportunity for the propagator to implement branch and bound optimization.

Definition at line 4910 of file z3++.h.

                                           {
            m_final_eh = f;
            if (s) {
                Z3_solver_propagate_final(ctx(), *s, final_eh);
            }
        }

register_fixed() [1/2]

void register_fixed ( )

inline

Definition at line 4877 of file z3++.h.

                              {
            m_fixed_eh = [this](expr const &id, expr const &e) {
                fixed(id, e);
            };
            if (s) {
                Z3_solver_propagate_fixed(ctx(), *s, fixed_eh);
            }
        }

register_fixed() [2/2]

void register_fixed ( fixed_eh_t & f )

inline

register callbacks. Callbacks can only be registered with user_propagators that were created using a solver.

Definition at line 4870 of file z3++.h.

                                           {
            m_fixed_eh = f;
            if (s) {
                Z3_solver_propagate_fixed(ctx(), *s, fixed_eh);
            }
        }

register_on_binding()

void register_on_binding ( )

inline

Definition at line 4958 of file z3++.h.

                                   {
            m_on_binding_eh = [this](expr const& q, expr const& inst) {
                return on_binding(q, inst);
            };
            if (s) 
                Z3_solver_propagate_on_binding(ctx(), *s, on_binding_eh);
        }