sjm.parse
Class ParserVisitor

java.lang.Object
  |
  +--sjm.parse.ParserVisitor

Direct Known Subclasses:

PrettyVisitor

public abstract class ParserVisitor

extends java.lang.Object

This class provides a "visitor" hierarchy in support of the Visitor pattern -- see the book, "Design Patterns" for an explanation of this pattern.

Constructor Summary

ParserVisitor()

Method Summary

abstract void	visitAlternation(Alternation a, java.util.Vector visited) Visit an alternation.
abstract void	visitEmpty(Empty e, java.util.Vector visited) Visit an empty parser.
abstract void	visitRepetition(Repetition r, java.util.Vector visited) Visit a repetition.
abstract void	visitSequence(Sequence s, java.util.Vector visited) Visit a sequence.
abstract void	visitTerminal(Terminal t, java.util.Vector visited) Visit a terminal.

Methods inherited from class java.lang.Object

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

Constructor Detail

ParserVisitor

public ParserVisitor()

Method Detail

visitAlternation

public abstract void visitAlternation(Alternation a,
                                      java.util.Vector visited)

Visit an alternation.

Parameters:

Alternation - the parser to visit

Vector - a collection of previously visited parsers

visitEmpty

public abstract void visitEmpty(Empty e,
                                java.util.Vector visited)

Visit an empty parser.

Parameters:

Empty - the parser to visit

Vector - a collection of previously visited parsers

visitRepetition

public abstract void visitRepetition(Repetition r,
                                     java.util.Vector visited)

Visit a repetition.

Parameters:

Repetition - the parser to visit

Vector - a collection of previously visited parsers

visitSequence

public abstract void visitSequence(Sequence s,
                                   java.util.Vector visited)

Visit a sequence.

Parameters:

Sequence - the parser to visit

Vector - a collection of previously visited parsers

visitTerminal

public abstract void visitTerminal(Terminal t,
                                   java.util.Vector visited)

Visit a terminal.

Parameters:

Terminal - the parser to visit

Vector - a collection of previously visited parsers