antlr
Class TreeBlockContext

java.lang.Object
  extended by antlr.BlockContext
      extended by antlr.TreeBlockContext

 class TreeBlockContext
extends BlockContext

The context needed to add root,child elements to a Tree. There is only one alternative (i.e., a list of children). We subclass to specialize. MakeGrammar.addElementToCurrentAlt will work correctly now for either a block of alts or a Tree child list. The first time addAlternativeElement is called, it sets the root element rather than adding it to one of the alternative lists. Rather than have the grammar duplicate the rules for grammar atoms etc... we use the same grammar and same refToken behavior etc... We have to special case somewhere and here is where we do it.


Field Summary
protected  boolean nextElementIsRoot
           
 
Fields inherited from class antlr.BlockContext
altNum, block, blockEnd
 
Constructor Summary
TreeBlockContext()
           
 
Method Summary
 void addAlternativeElement(AlternativeElement e)
           
 
Methods inherited from class antlr.BlockContext
currentAlt, currentElement
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Field Detail

nextElementIsRoot

protected boolean nextElementIsRoot
Constructor Detail

TreeBlockContext

TreeBlockContext()
Method Detail

addAlternativeElement

public void addAlternativeElement(AlternativeElement e)
Overrides:
addAlternativeElement in class BlockContext