Detailed Description

Now we define two classes that are used to implement the solution generators. The first one uses a vector of subset indices as focus, while the second one uses a vector of Booleans. This makes the declaration of the solution generators shorter, more readable and improves type correctness. The class of solution generators that use a vector of subset indices as focus, with a transformation from a vector of Booleans to a vector of subset indices if needed.

Definition at line 171 of file set_cover_heuristics.h.

#include <set_cover_heuristics.h>

Inheritance diagram for operations_research::SubsetListBasedSolutionGenerator:

Public Member Functions
	SubsetListBasedSolutionGenerator (SetCoverInvariant *inv, SetCoverInvariant::ConsistencyLevel consistency_level, absl::string_view class_name, absl::string_view name)
bool	NextSolution (absl::Span< const SubsetIndex > _) override
bool	NextSolution () final
	Virtual methods that must be implemented by derived classes.
bool	NextSolution (const SubsetBoolVector &in_focus) final
	Same as above, but with a vector of Booleans as focus.
Public Member Functions inherited from operations_research::SetCoverSolutionGenerator
	SetCoverSolutionGenerator (SetCoverInvariant *inv, SetCoverInvariant::ConsistencyLevel consistency_level, absl::string_view class_name, absl::string_view name)
virtual	~SetCoverSolutionGenerator ()=default
void	SetName (const absl::string_view name)
SetCoverInvariant *	inv () const
virtual SetCoverSolutionGenerator &	ResetLimits ()
	Resets the limits to their default values.
SetCoverSolutionGenerator &	SetMaxIterations (int64_t max_iterations)
	Sets the maximum number of iterations.
int64_t	max_iterations () const
	Returns the maximum number of iterations.
SetCoverSolutionGenerator &	SetTimeLimitInSeconds (double seconds)
	Sets the time limit in seconds.
absl::Duration	run_time () const
double	run_time_in_seconds () const
	Returns the total elapsed runtime in seconds.
double	run_time_in_microseconds () const
	Returns the total elapsed runtime in microseconds.
std::string	name () const
	Returns the name of the heuristic.
std::string	class_name () const
	Returns the name of the class.
Cost	cost () const
	Returns the current cost of the solution in the invariant.
bool	CheckInvariantConsistency () const

Additional Inherited Members
Protected Member Functions inherited from operations_research::SetCoverSolutionGenerator
SetCoverModel *	model () const
	Accessors.
BaseInt	num_subsets () const
double	time_limit_in_seconds () const
	The time limit in seconds.
Protected Attributes inherited from operations_research::SetCoverSolutionGenerator
absl::Duration	run_time_
	run_time_ is an abstract duration for the time spent in NextSolution().
SetCoverInvariant::ConsistencyLevel	consistency_level_
	The consistency needed by the solution generator.

Constructor & Destructor Documentation

◆ SubsetListBasedSolutionGenerator()

operations_research::SubsetListBasedSolutionGenerator::SubsetListBasedSolutionGenerator	(	SetCoverInvariant *	inv,
		SetCoverInvariant::ConsistencyLevel	consistency_level,
		absl::string_view	class_name,
		absl::string_view	name )