xtc.parser
Class PrefixFolder

java.lang.Object
  xtc.tree.Visitor
      xtc.parser.GrammarVisitor
          xtc.parser.PrefixFolder

public class PrefixFolder
extends GrammarVisitor

Visitor to combine common prefixes into a single sequence with an embedded choice. Note that the different alternatives in an ordered choice must have been normalized into sequences.

Version:

$Revision: 1.18 $

Author:

Robert Grimm

Field Summary

Fields inherited from class xtc.parser.GrammarVisitor

analyzer, isBound, isLastElement, isPredicate, isRepeatedOnce, isTopLevel, isVoided, needsSequence, runtime, transformInPlace

Constructor Summary

PrefixFolder(Runtime runtime, Analyzer analyzer)
Create a new prefix folder.

Method Summary

Element	visit(OrderedChoice c) Visit the specified ordered choice.
Element	visit(Predicate p) Visit the specified predicate.

Methods inherited from class xtc.parser.GrammarVisitor

visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit

Methods inherited from class xtc.tree.Visitor

dispatch, equals, hashCode, iterate, map, mapInPlace, unableToVisit, visit

Methods inherited from class java.lang.Object

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

Constructor Detail

PrefixFolder

public PrefixFolder(Runtime runtime,
                    Analyzer analyzer)

Create a new prefix folder.

Parameters:

runtime - The runtime.

analyzer - The analyzer utility.

Method Detail

visit

public Element visit(OrderedChoice c)

Visit the specified ordered choice.

Overrides:

visit in class GrammarVisitor

visit

public Element visit(Predicate p)

Visit the specified predicate.

Overrides:

visit in class GrammarVisitor