| 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.
|
