Class WeightedNameDistance

java.lang.Object

org.ek9lang.compiler.phase5.WeightedNameDistance

All Implemented Interfaces:

ToIntBiFunction<String,String>

final class WeightedNameDistance
extends Object
implements ToIntBiFunction<String,String>

THE distance E11030 reports (ConfusinglySimilarNamesOrError) - the weighted edit distance its rich message describes, and nothing else: a character inserted, removed or changed costs 2 wherever it is (the first and last positions included), two ADJACENT characters swapped cost 2 (one edit, as Damerau counts it - title/titel) except at the FIRST letter (positions 0-1), where a swap is two changes (latitude/altitude, 4 - Steve, 2026-10-12), and a change of case alone costs 1.

Deliberately NOT org.ek9.lang.Levenshtein.costOfMatch: that is the runtime's fuzzy match, which charges an insertion at the START 1 (so zqname/name came out at 2, one edit) and has no swap. Its asymmetry made the message untrue (lane lang-syntax, fix round 1). Was ConfusinglySimilarNamesOrError.weightedDistance (no-statics lane P2, 2026-10-29).

Field Summary

Fields

Modifier and Type	Field	Description
(package private) static final int	CASE_COST	The cost of a change of case alone (t/T).
(package private) static final int	EDIT_COST	The cost of one edit: a character inserted, removed or changed, or two adjacent characters swapped.

Constructor Summary

Constructors

Constructor	Description
WeightedNameDistance()

Method Summary

Modifier and Type	Method	Description
int	applyAsInt(String name1, String name2)

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

EDIT_COST

static final int EDIT_COST

The cost of one edit: a character inserted, removed or changed, or two adjacent characters swapped.

See Also:

• Constant Field Values

CASE_COST

static final int CASE_COST

The cost of a change of case alone (t/T).

See Also:

• Constant Field Values

Constructor Details

WeightedNameDistance

WeightedNameDistance()

Method Details

applyAsInt

public int applyAsInt(String name1,
 String name2)

Specified by:

applyAsInt in interface ToIntBiFunction<String,String>