[antlr-interest] How to do iteration in Tree Grammar

[Bart Kiers]

Hi Yifan,

How about something like this:

    foo: ^(VIRTUAL_NODE (bar {if($bar.value) return;})* );

?

Regards,

Bart.


2011/9/22 轶凡 <yifan.cby at taobao.com>

> Hi, I defined a tree grammar as below:
>
> foo: ^(VIRTUAL_NODE bar*) {
>  echo($bar.value);
> };
>
> bar returns [boolean value] : //… Omitted
>
> The generated source of rule foo is like below:
>
> public final void foo() throws XX
> {
>  boolean bar40 = false;
>  do{
>    //omitted
> bar40=bar();
> //omitted
>  }while (true)
>  echo(bar40)
> }
>
> Actually in the rule ‘foo’, I want to do some actions against every ‘bar’,
> not the final bar’s value, code in imagination:
>
> public final void foo() throws XX
> {
>  boolean bar40 = false;
>  do{
>    //omitted
> bar40=bar();
> if (bar40){
> echo(bar40);
> return;
> }
> //omitted
>  }while (true)
>  echo(bar40)
> }
> How to change the rule ‘foo’ to archive my goal?
>
> Thanks for your help!
>
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