[antlr-interest] Re: Manually insert a node into an automatically contructed tree

[Terence Parr]

On Mar 13, 2004, at 4:20 AM, oliver_kellogg wrote:

> Terence Parr wrote:
>
>>> Is it possible to insert an artificial (dummy) item in the tree
>>> that is automatically constructed for a rule?
>>
>> Yes. It looks like you are doing so below...doesn't that work?
>
> It does work for the C++ targeted grammar, but it
> doesn't for the Java targeted one which I am currently
> working on:
>
> AdaParser.java:7061: exception antlr.RecognitionException is never
> thrown in body of corresponding try statement
>
> This happens while translating the method empty_component_items()
> which is produced by the rule
>
> empty_component_items :
>   { #empty_component_items =
>     #(#[COMPONENT_ITEMS,
>        "COMPONENT_ITEMS"], #empty_component_items); }
>   ;

Oh, sorry about that...that rule has no content to match.  Put this 
imaginary root generation code in the rule where you actually match 
stuff that needs an imaginary root.

:)

Ter
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