scala.util.automata
class WordBerrySethi

[source: `scala/util/automata/WordBerrySethi.scala`]

`abstract` `class` WordBerrySethi
  `extends` BaseBerrySethi

  This class turns a regexp into a NondetWordAutom using the celebrated position automata construction (also called Berry-Sethi or Glushkov)

Author
  Burak Emir
Version
  1.0

Direct Known Subclasses:
  ContentModel.Translator

Type Summary
`type` | _labelT

Value Summary
`protected var` | defaultq : Array[List[Int]]
`protected var` | deltaq : Array[HashMap[_labelT, List[Int]]]
`protected var` | initials : Set[Int]
`protected var` | labelAt : TreeMap[Int, _labelT]
`protected var` | labels : HashSet[_labelT]
`override abstract val` | lang : WordExp

Values and Variables inherited from BaseBerrySethi
pos, globalFirst, follow, finalTag, finals, emptySet

Method Summary
`def` | automatonFrom (pat : RegExp, finalTag : Int) : NondetWordAutom[_labelT]
`protected def` | collectTransitions : Unit
`protected override def` | compFirst (r : RegExp) : Set[Int] Computes `first(r)` where the word regexp `r`.
`protected override def` | compFollow1 (fol1 : Set[Int], r : RegExp) : Set[Int] Returns the first set of an expression, setting the follow set along the way.
`protected override def` | compLast (r : RegExp) : Set[Int] Computes `last(r)` where the word regexp `r`.
`protected def` | initialize (subexpr : Seq[RegExp]) : Unit
`protected def` | initializeAutom : Unit
`protected def` | makeTransition (src : Int, dest : Int, label : _labelT) : Unit
`protected def` | seenLabel (r : RegExp, i : Int, label : _labelT) : Unit called at the leaves of the regexp
`protected def` | seenLabel (r : RegExp, label : _labelT) : Int
`override def` | traverse (r : RegExp) : Unit

Methods inherited from BaseBerrySethi
compFollow

Methods inherited from AnyRef
getClass, hashCode, equals, clone, toString, notify, notifyAll, wait, wait, wait, finalize, ==, !=, eq, ne, synchronized

Methods inherited from Any
==, !=, isInstanceOf, asInstanceOf

Type Details

`` `type` _labelT

Value Details

`override abstract` `val` lang : WordExp

Overrides
  BaseBerrySethi.lang

`protected` `var` labels : HashSet[_labelT]

`protected` `var` labelAt : TreeMap[Int, _labelT]

`protected` `var` deltaq : Array[HashMap[_labelT, List[Int]]]

`protected` `var` defaultq : Array[List[Int]]

`protected` `var` initials : Set[Int]

Method Details

`protected override` `def` compFirst(r : RegExp) : Set[Int]

  Computes `first(r)` where the word regexp `r`.

Parameters
  `r -` the regular expression
Returns
  the computed set `first(r)`

Overrides
  BaseBerrySethi.compFirst

`protected override` `def` compLast(r : RegExp) : Set[Int]

  Computes `last(r)` where the word regexp `r`.

Parameters
  `r -` the regular expression
Returns
  the computed set `last(r)`

Overrides
  BaseBerrySethi.compLast

`protected override` `def` compFollow1(fol1 : Set[Int], r : RegExp) : Set[Int]

  Returns the first set of an expression, setting the follow set along the way.

Parameters
  `fol1 -` ...
  `r -` the regular expression
Returns
  the computed set

Overrides
  BaseBerrySethi.compFollow1

`protected` `def` seenLabel(r : RegExp, i : Int, label : _labelT) : Unit

  called at the leaves of the regexp

`protected` `def` seenLabel(r : RegExp, label : _labelT) : Int

`override` `def` traverse(r : RegExp) : Unit

Overrides
  BaseBerrySethi.traverse

`protected` `def` makeTransition(src : Int, dest : Int, label : _labelT) : Unit

`protected` `def` initialize(subexpr : Seq[RegExp]) : Unit

`protected` `def` initializeAutom : Unit

`protected` `def` collectTransitions : Unit

`` `def` automatonFrom(pat : RegExp, finalTag : Int) : NondetWordAutom[_labelT]