Detailed Description

This struct holds all parameters for the default search. DefaultPhaseParameters is only used by Solver::MakeDefaultPhase methods. Note this is for advanced users only.

Definition at line 192 of file constraint_solver.h.

#include <constraint_solver.h>

Public Types
enum	VariableSelection { CHOOSE_MAX_SUM_IMPACT = 0 , CHOOSE_MAX_AVERAGE_IMPACT = 1 , CHOOSE_MAX_VALUE_IMPACT = 2 }
enum	ValueSelection { SELECT_MIN_IMPACT = 0 , SELECT_MAX_IMPACT = 1 }
enum	DisplayLevel { NONE = 0 , NORMAL = 1 , VERBOSE = 2 }

Public Member Functions
	DefaultPhaseParameters ()

Public Attributes
VariableSelection	var_selection_schema
ValueSelection	value_selection_schema
	This parameter describes which value to select for a given var.
int	initialization_splits
bool	run_all_heuristics
int	heuristic_period
int	heuristic_num_failures_limit
	The failure limit for each heuristic that we run.
bool	persistent_impact
int	random_seed
	Seed used to initialize the random part in some heuristics.
DisplayLevel	display_level
bool	use_last_conflict
	Should we use last conflict method. The default is false.
DecisionBuilder *	decision_builder
	When defined, this overrides the default impact based decision builder.

Member Enumeration Documentation

◆ DisplayLevel

enum operations_research::DefaultPhaseParameters::DisplayLevel

Enumerator
NONE
NORMAL
VERBOSE

Definition at line 205 of file constraint_solver.h.

◆ ValueSelection

enum operations_research::DefaultPhaseParameters::ValueSelection

Enumerator
SELECT_MIN_IMPACT
SELECT_MAX_IMPACT

Definition at line 200 of file constraint_solver.h.

◆ VariableSelection

enum operations_research::DefaultPhaseParameters::VariableSelection

Enumerator
CHOOSE_MAX_SUM_IMPACT
CHOOSE_MAX_AVERAGE_IMPACT
CHOOSE_MAX_VALUE_IMPACT

Definition at line 194 of file constraint_solver.h.

Constructor & Destructor Documentation

◆ DefaultPhaseParameters()

operations_research::DefaultPhaseParameters::DefaultPhaseParameters ( )

Definition at line 47 of file default_search.cc.

Member Data Documentation

◆ decision_builder

DecisionBuilder* operations_research::DefaultPhaseParameters::decision_builder

When defined, this overrides the default impact based decision builder.

Definition at line 246 of file constraint_solver.h.

◆ display_level

DisplayLevel operations_research::DefaultPhaseParameters::display_level

This represents the amount of information displayed by the default search. NONE means no display, VERBOSE means extra information.

Definition at line 240 of file constraint_solver.h.

◆ heuristic_num_failures_limit

int operations_research::DefaultPhaseParameters::heuristic_num_failures_limit

The failure limit for each heuristic that we run.

Definition at line 229 of file constraint_solver.h.

◆ heuristic_period

int operations_research::DefaultPhaseParameters::heuristic_period

The distance in nodes between each run of the heuristics. A negative or null value will mean that we will not run heuristics at all.

Definition at line 226 of file constraint_solver.h.

◆ initialization_splits

int operations_research::DefaultPhaseParameters::initialization_splits

Maximum number of intervals that the initialization of impacts will scan per variable.

Definition at line 216 of file constraint_solver.h.

◆ persistent_impact

bool operations_research::DefaultPhaseParameters::persistent_impact

Whether to keep the impact from the first search for other searches, or to recompute the impact for each new search.

Definition at line 233 of file constraint_solver.h.

◆ random_seed

int operations_research::DefaultPhaseParameters::random_seed

Seed used to initialize the random part in some heuristics.

Definition at line 236 of file constraint_solver.h.

◆ run_all_heuristics

bool operations_research::DefaultPhaseParameters::run_all_heuristics

The default phase will run heuristics periodically. This parameter indicates if we should run all heuristics, or a randomly selected one.

Definition at line 221 of file constraint_solver.h.

◆ use_last_conflict

bool operations_research::DefaultPhaseParameters::use_last_conflict

Should we use last conflict method. The default is false.

Definition at line 243 of file constraint_solver.h.

◆ value_selection_schema

ValueSelection operations_research::DefaultPhaseParameters::value_selection_schema

This parameter describes which value to select for a given var.

Definition at line 212 of file constraint_solver.h.

◆ var_selection_schema

VariableSelection operations_research::DefaultPhaseParameters::var_selection_schema

This parameter describes how the next variable to instantiate will be chosen.

Definition at line 209 of file constraint_solver.h.

The documentation for this struct was generated from the following files:

ortools/constraint_solver/constraint_solver.h
ortools/constraint_solver/default_search.cc