DeltaAlgorithm - Implements the delta debugging algorithm (A. More...

#include "llvm/ADT/DeltaAlgorithm.h"

Public Types
using	change_ty = unsigned

using	changeset_ty = std::set< change_ty >

using	changesetlist_ty = std::vector< changeset_ty >

Public Member Functions
virtual	~DeltaAlgorithm ()

changeset_ty	Run (const changeset_ty &Changes)
	Run - Minimize the set `Changes` by executing.

Protected Member Functions
virtual void	UpdatedSearchState (const changeset_ty &Changes, const changesetlist_ty &Sets)
	UpdatedSearchState - Callback used when the search state changes.

virtual bool	ExecuteOneTest (const changeset_ty &S)=0
	ExecuteOneTest - Execute a single test predicate on the change set `S`.

DeltaAlgorithm &	operator= (const DeltaAlgorithm &)=default

Detailed Description

DeltaAlgorithm - Implements the delta debugging algorithm (A.

Zeller '99) for minimizing arbitrary sets using a predicate function.

The result of the algorithm is a subset of the input change set which is guaranteed to satisfy the predicate, assuming that the input set did. For well formed predicates, the result set is guaranteed to be such that removing any single element would falsify the predicate.

For best results the predicate function should (but need not) satisfy certain properties, in particular: (1) The predicate should return false on an empty set and true on the full set. (2) If the predicate returns true for a set of changes, it should return true for all supersets of that set.

It is not an error to provide a predicate that does not satisfy these requirements, and the algorithm will generally produce reasonable results. However, it may run substantially more tests than with a good predicate.

Definition at line 35 of file DeltaAlgorithm.h.

Member Typedef Documentation

◆ change_ty

using llvm::DeltaAlgorithm::change_ty = unsigned

Definition at line 37 of file DeltaAlgorithm.h.

◆ changeset_ty

using llvm::DeltaAlgorithm::changeset_ty = std::set<change_ty>

Definition at line 39 of file DeltaAlgorithm.h.

◆ changesetlist_ty

using llvm::DeltaAlgorithm::changesetlist_ty = std::vector<changeset_ty>

Definition at line 40 of file DeltaAlgorithm.h.

Constructor & Destructor Documentation

◆ ~DeltaAlgorithm()

DeltaAlgorithm::~DeltaAlgorithm ( )

virtualdefault

References Run().

Member Function Documentation

◆ ExecuteOneTest()

virtual bool llvm::DeltaAlgorithm::ExecuteOneTest ( const changeset_ty & S )

protectedpure virtual

ExecuteOneTest - Execute a single test predicate on the change set S.

◆ operator=()

DeltaAlgorithm & llvm::DeltaAlgorithm::operator= ( const DeltaAlgorithm & )

protecteddefault

◆ Run()

DeltaAlgorithm::changeset_ty DeltaAlgorithm::Run ( const changeset_ty & Changes )

Run - Minimize the set Changes by executing.

See also: ExecuteOneTest() on subsets of changes and returning the smallest set which still satisfies the test predicate.

Definition at line 102 of file DeltaAlgorithm.cpp.

Referenced by ~DeltaAlgorithm().

◆ UpdatedSearchState()

virtual void llvm::DeltaAlgorithm::UpdatedSearchState	(	const changeset_ty &	Changes,
		const changesetlist_ty &	Sets
	)

inlineprotectedvirtual

UpdatedSearchState - Callback used when the search state changes.

Definition at line 73 of file DeltaAlgorithm.h.

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

include/llvm/ADT/DeltaAlgorithm.h
lib/Support/DeltaAlgorithm.cpp

Public Types

Public Member Functions

Protected Member Functions