[antlr-interest] AST Tree question

[Gibson, Andrea]

Yeah sure,

 

port: (DIGIT)+;

 

Where DIGIT is just 0-9

 

And

 

host : hostName

       | ipv6Reference;

 

hostName 

       :(domainLabel(PERIOD)?     )*;

 

ipv6Reference 

       : OPEN_BRACKET ipv6Address CLOSE_BRACKET;

 

-Gabbie

 

  _____  

From: Jose Ventura [mailto:jose.ventura.roda at gmail.com] 
Sent: Wednesday, January 17, 2007 4:25 AM
To: Gibson, Andrea
Cc: ANTLR Interest
Subject: Re: [antlr-interest] AST Tree question

 

Can you put the 'host' and 'port' rules?



 

2007/1/16, Gibson, Andrea <AGibson at carrieraccess.com
<mailto:AGibson at carrieraccess.com> >: 

Hello,

 I am having some trouble with setting up a tree structure so that I can
easily get the text below, and I was wondering if someone could give me some
help. 

 

Here is the code I am working on

 

hostPort returns[HostPort hp = null] 

            { Integer p=null;} 

            : (h:host (c:COLON^ p1:port)?) 

            { hp= new HostPort(#h.getText()); 

            if(#p1!=null) p=Integer.parseInt(#p1.getText()); 

            if(p!=null)hp = new HostPort(#h.getText(),p);}; 

 

And what I want is the text from the host and port. But with how I have it
set up now, #h.getText() is just the first character in the host, and if I
traverse the AST tree using getRight() it continues though all the
characters including into the port. Is there a way to separate these out? Is
there a way to make the host be a root of another tree and not have it based
around a token from the lexer? 

 

Any help is appreciated.

 

-Gabbie

 

 

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