llvm::DeltaAlgorithm Class Reference

#include <DeltaAlgorithm.h>

List of all members.

Public Types
typedef unsigned	change_ty
typedef std::set< change_ty >	changeset_ty
typedef std::vector< changeset_ty >	changesetlist_ty
Public Member Functions
virtual	~DeltaAlgorithm ()
changeset_ty	Run (const changeset_ty &Changes)
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.

---

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 36 of file DeltaAlgorithm.h.

---

Member Typedef Documentation

typedef unsigned llvm::DeltaAlgorithm::change_ty

Definition at line 38 of file DeltaAlgorithm.h.

typedef std::set<change_ty> llvm::DeltaAlgorithm::changeset_ty

Definition at line 40 of file DeltaAlgorithm.h.

typedef std::vector<changeset_ty> llvm::DeltaAlgorithm::changesetlist_ty

Definition at line 41 of file DeltaAlgorithm.h.

---

Constructor & Destructor Documentation

DeltaAlgorithm::~DeltaAlgorithm

(

)

[virtual]

Definition at line 14 of file DeltaAlgorithm.cpp.

---

Member Function Documentation

virtual bool llvm::DeltaAlgorithm::ExecuteOneTest

(

const changeset_ty &

S

)

[protected, pure virtual]

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

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 104 of file DeltaAlgorithm.cpp.

virtual void llvm::DeltaAlgorithm::UpdatedSearchState	(	const changeset_ty &	Changes,
		const changesetlist_ty &	Sets
	)		[inline, protected, virtual]

UpdatedSearchState - Callback used when the search state changes.

Definition at line 74 of file DeltaAlgorithm.h.

---

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

• DeltaAlgorithm.h
• DeltaAlgorithm.cpp