[antlr-interest] Re: getFirstChild vs getNextSibling ?

[jw9315]

Hi,
so what type of tree structures have a nextSibling()of null, because 
I can always get the firstChild, but calls to getNextSibling always 
return null?
Thanks,
Jon

of null

--- In antlr-interest at yahoogroups.com, ow <oneway_111 at y...> wrote:
> --- jw9315 <jw9315 at b...> wrote:
> > Hi,
> > I writing a very simple interpreter using an AST tree. I know 
this is
> > 
> > probably a trivial question, but what is the difference between 
the 
> > calls astTree.getFirstChild() vs astTree.getNextSibling()? Could 
> > anyone give me a short example, it would be much appreciated!
> > Thanks,
> > Jon
> 
> The way I see it:
> 
> AST parent
>         +
>         |
>         |--- firstChild = parent.getFirstChild()
>         |
>         |--- nextSibling = firstChild.getNextSibling()
> 
>      
> 
> 
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