This document is the API specification for Scala 2.
| Class Summary | |
abstract
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class
Base
Basic regular expressions. |
abstract
|
class
PointedHedgeExp
pointed regular hedge expressions, a useful subclass of regular hedge expressions. |
class
SyntaxError
This runtime exception is thrown if an attempt to instantiate a syntactically incorrect expression is detected. |
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abstract
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class
WordExp
This class provides regular word expressions. Users have to instantiate type member _regexpT <: RegExp (from class Base)
and a type member _labelT <: Label.
Here is a little example:
import scala.util.regexp._
import scala.util.automata._
object MyLang extends WordExp {
type _regexpT = RegExp
type _labelT = MyChar
case class MyChar(c:Char) extends Label
}
import MyLang._
// (a* | b)*
val rex = Star(Alt(Star(Letter(MyChar('a'))),Letter(MyChar('b'))))
object MyBerriSethi extends WordBerrySethi {
override val lang = MyLang
}
val nfa = MyBerriSethi.automatonFrom(Sequ(rex), 1)
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