![]() |
OR-Tools
8.2
|
This class encapsulates an objective.
It requires the direction (minimize or maximize), the variable to optimize, and the improvement step.
Definition at line 4204 of file constraint_solver.h.
Public Member Functions | |
OptimizeVar (Solver *const s, bool maximize, IntVar *const a, int64 step) | |
~OptimizeVar () override | |
int64 | best () const |
Returns the best value found during search. More... | |
IntVar * | Var () const |
Returns the variable that is optimized. More... | |
bool | AcceptDelta (Assignment *delta, Assignment *deltadelta) override |
Internal methods. More... | |
void | EnterSearch () override |
Beginning of the search. More... | |
void | BeginNextDecision (DecisionBuilder *const db) override |
Before calling DecisionBuilder::Next. More... | |
void | RefuteDecision (Decision *const d) override |
Before refuting the decision. More... | |
bool | AtSolution () override |
This method is called when a valid solution is found. More... | |
bool | AcceptSolution () override |
This method is called when a solution is found. More... | |
virtual std::string | Print () const |
std::string | DebugString () const override |
void | Accept (ModelVisitor *const visitor) const override |
Accepts the given model visitor. More... | |
void | ApplyBound () |
virtual void | RestartSearch () |
Restart the search. More... | |
virtual void | ExitSearch () |
End of the search. More... | |
virtual void | EndNextDecision (DecisionBuilder *const b, Decision *const d) |
After calling DecisionBuilder::Next, along with the returned decision. More... | |
virtual void | ApplyDecision (Decision *const d) |
Before applying the decision. More... | |
virtual void | AfterDecision (Decision *const d, bool apply) |
Just after refuting or applying the decision, apply is true after Apply. More... | |
virtual void | BeginFail () |
Just when the failure occurs. More... | |
virtual void | EndFail () |
After completing the backtrack. More... | |
virtual void | BeginInitialPropagation () |
Before the initial propagation. More... | |
virtual void | EndInitialPropagation () |
After the initial propagation. More... | |
virtual void | NoMoreSolutions () |
When the search tree is finished. More... | |
virtual bool | LocalOptimum () |
When a local optimum is reached. More... | |
virtual void | AcceptNeighbor () |
After accepting a neighbor during local search. More... | |
virtual void | AcceptUncheckedNeighbor () |
After accepting an unchecked neighbor during local search. More... | |
virtual bool | IsUncheckedSolutionLimitReached () |
Returns true if the limit of solutions has been reached including unchecked solutions. More... | |
Solver * | solver () const |
virtual void | PeriodicCheck () |
Periodic call to check limits in long running methods. More... | |
virtual int | ProgressPercent () |
Returns a percentage representing the propress of the search before reaching limits. More... | |
virtual void | Install () |
Registers itself on the solver such that it gets notified of the search and propagation events. More... | |
Static Public Attributes | |
static constexpr int | kNoProgress = -1 |
Protected Attributes | |
IntVar *const | var_ |
int64 | step_ |
int64 | best_ |
bool | maximize_ |
bool | found_initial_solution_ |
OptimizeVar | ( | Solver *const | s, |
bool | maximize, | ||
IntVar *const | a, | ||
int64 | step | ||
) |
|
override |
|
overridevirtual |
Accepts the given model visitor.
Reimplemented from SearchMonitor.
|
overridevirtual |
|
virtualinherited |
After accepting a neighbor during local search.
Definition at line 2887 of file constraint_solver.cc.
|
overridevirtual |
This method is called when a solution is found.
It asserts whether the solution is valid. A value of false indicates that the solution should be discarded.
Reimplemented from SearchMonitor.
|
virtualinherited |
After accepting an unchecked neighbor during local search.
Reimplemented in SearchLog.
Definition at line 2888 of file constraint_solver.cc.
|
virtualinherited |
Just after refuting or applying the decision, apply is true after Apply.
This is called only if the Apply() or Refute() methods have not failed.
Definition at line 2875 of file constraint_solver.cc.
|
virtualinherited |
Before applying the decision.
Reimplemented in SearchLog.
Definition at line 2873 of file constraint_solver.cc.
|
overridevirtual |
This method is called when a valid solution is found.
If the return value is true, then search will resume after. If the result is false, then search will stop there.
Reimplemented from SearchMonitor.
|
virtualinherited |
Just when the failure occurs.
Reimplemented in SearchLog, and DemonProfiler.
Definition at line 2876 of file constraint_solver.cc.
|
virtualinherited |
Before the initial propagation.
Reimplemented in SearchLog.
Definition at line 2878 of file constraint_solver.cc.
|
overridevirtual |
Before calling DecisionBuilder::Next.
Reimplemented from SearchMonitor.
|
inline |
Returns the best value found during search.
Definition at line 4210 of file constraint_solver.h.
|
overridevirtual |
Reimplemented from BaseObject.
|
virtualinherited |
After completing the backtrack.
Definition at line 2877 of file constraint_solver.cc.
|
virtualinherited |
After the initial propagation.
Reimplemented in SearchLog.
Definition at line 2879 of file constraint_solver.cc.
|
virtualinherited |
After calling DecisionBuilder::Next, along with the returned decision.
Reimplemented in SymmetryManager.
Definition at line 2871 of file constraint_solver.cc.
|
overridevirtual |
Beginning of the search.
Reimplemented from SearchMonitor.
|
virtualinherited |
End of the search.
Reimplemented in RegularLimit, SearchLog, and LocalSearchProfiler.
Definition at line 2869 of file constraint_solver.cc.
|
virtualinherited |
Registers itself on the solver such that it gets notified of the search and propagation events.
Reimplemented in Trace, LocalSearchMonitorMaster, PropagationMonitor, LocalSearchMonitor, DemonProfiler, and LocalSearchProfiler.
Definition at line 2892 of file constraint_solver.cc.
|
inlinevirtualinherited |
Returns true if the limit of solutions has been reached including unchecked solutions.
Reimplemented in RegularLimit.
Definition at line 3706 of file constraint_solver.h.
|
virtualinherited |
When a local optimum is reached.
If 'true' is returned, the last solution is discarded and the search proceeds with the next one.
Definition at line 2883 of file constraint_solver.cc.
|
virtualinherited |
When the search tree is finished.
Reimplemented in SearchLog.
Definition at line 2882 of file constraint_solver.cc.
|
virtualinherited |
Periodic call to check limits in long running methods.
Reimplemented in SearchLimit.
Definition at line 2889 of file constraint_solver.cc.
|
inlinevirtualinherited |
Returns a percentage representing the propress of the search before reaching limits.
Reimplemented in RegularLimit.
Definition at line 3715 of file constraint_solver.h.
|
overridevirtual |
Before refuting the decision.
Reimplemented from SearchMonitor.
|
virtualinherited |
Restart the search.
Reimplemented in DemonProfiler, and LocalSearchProfiler.
Definition at line 2868 of file constraint_solver.cc.
|
inlineinherited |
Definition at line 3708 of file constraint_solver.h.
|
inline |
Returns the variable that is optimized.
Definition at line 4213 of file constraint_solver.h.
|
protected |
Definition at line 4230 of file constraint_solver.h.
|
protected |
Definition at line 4232 of file constraint_solver.h.
|
staticconstexprinherited |
Definition at line 3637 of file constraint_solver.h.
|
protected |
Definition at line 4231 of file constraint_solver.h.
|
protected |
Definition at line 4229 of file constraint_solver.h.
|
protected |
Definition at line 4228 of file constraint_solver.h.