[antlr-interest] ANTLR tree walker , multiple times return....

[Michael Angelo]

I'm pretty sure that I had a similar problem to yours. Its matching the
first parameter where the others are separated by ',' correct?

I'm parsing SQL so its not exactly the same, but very close when I have a
function in place of a table. Here is how I got mine to work:

  t='table' '(' func=IDENT '(' arguments ')' ')' alias
  {
     Table tbl = new Table($t.text + "(" + $func.text + "(" +
$arguments.text + ")" + ")", $alias.text);
     tables.add(tbl);
  }
  ;

arguments
:
  argument (',' argument)*
;

argument
:
  '?' | '\u0027' '\u0027' | '\u0027' ',' '\u0027'
;

The 'u0027' are the single quote characters. I wouldn't think you need
that, but I'm hoping there is a pattern in here for you.

Let me know if this helps!!

Mike



On Tue, Jun 19, 2012 at 9:20 AM, Felix.徐 <ygnhzeus at gmail.com> wrote:

> Hi,all .
>
> I have a tree walker like this:
>
> function:
>    ^(FUNCTION_TOK fcname=IDENTIFIER param=functionParameters*){
>        a_param_arrayList.add(param);
>    }
> ;
>
> functionParameters returns [Object sth]:
>    ^(PARAM_TOK value=IDENTIFIER){ sth = $value.getText();}
> ;
>
> This is a simple scenario,I just want to add the parameters to an
> arraylist, but the code above(*a_param_arrayList.add(param)*) will only
> collects the first parameter and ignores the
> others.But*functionParameters* actually
> parases multiple parameters.
>
> Does anyone know how to fix this tree walker? Thanks very much!
>
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