Home Original page

Google OR-Tools: operations_research::DefaultPhaseParameters Struct Reference

This struct holds all parameters for the default search. More...

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 184 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.

◆ DisplayLevel

◆ ValueSelection

◆ VariableSelection

Enumerator
CHOOSE_MAX_SUM_IMPACT 
CHOOSE_MAX_AVERAGE_IMPACT 
CHOOSE_MAX_VALUE_IMPACT 

Definition at line 186 of file constraint_solver.h.

operations_research::DefaultPhaseParameters::DefaultPhaseParameters ( )

◆ decision_builder

DecisionBuilder* operations_research::DefaultPhaseParameters::decision_builder

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

Definition at line 238 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 232 of file constraint_solver.h.

◆ heuristic_num_failures_limit

int operations_research::DefaultPhaseParameters::heuristic_num_failures_limit

◆ 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 218 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 208 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 225 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 228 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 213 of file constraint_solver.h.

◆ use_last_conflict

bool operations_research::DefaultPhaseParameters::use_last_conflict

◆ value_selection_schema

ValueSelection operations_research::DefaultPhaseParameters::value_selection_schema

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

Definition at line 204 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 201 of file constraint_solver.h.

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