inf.compilers
Class LexicalAnalyzer.RegexNode

java.lang.Object
  inf.compilers.LexicalAnalyzer.RegexNode

Direct Known Subclasses:

LexicalAnalyzer.AlternativesNode, LexicalAnalyzer.CharClassNode, LexicalAnalyzer.FixedStringNode, LexicalAnalyzer.RptExprNode, LexicalAnalyzer.SequenceNode, LexicalAnalyzer.SingleCharNode

Enclosing class:

LexicalAnalyzer

abstract static class LexicalAnalyzer.RegexNode
extends java.lang.Object

Regular expressions are internally represented as trees. This class represents a node in a regex tree. It can represent either a single character node, a character class node, a repetition node, a sequence node, or an alternatives node.

Constructor Summary

LexicalAnalyzer.RegexNode()

Method Summary

(package private) abstract boolean

matchChars(LexicalAnalyzer la)

Methods inherited from class java.lang.Object

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

Constructor Detail

LexicalAnalyzer.RegexNode

LexicalAnalyzer.RegexNode()

Method Detail

matchChars

abstract boolean matchChars(LexicalAnalyzer la)
                     throws java.io.IOException

Returns:

true iff the group could be read from the input

Throws:

java.io.IOException - if reading fails