[antlr-interest] Possible problem with lists after upgrade to 3.1

[Grzegorz Cieslewski]

Ter,

One quick question.  I am on a tight schedule, will you be able to fix
this issue soon or should I change my grammars to use an intermediate
rule?

Greg

P.S. Either is fine with me, I just need to know how to proceed.


On Tue, Aug 12, 2008 at 10:15 PM, Grzegorz Cieslewski
<cieslewski at hcs.ufl.edu> wrote:
> I guess a temporary workaround could be creating an intermediate rule like:
>
> expr
>        : (listA+=exprInter)+ -> ^(EXPR $listA+)
>        ;
>
> exprInter
>        : (number | id)
>        ;
> It seems to work like that.
>
> Also how do I add it manually to the list ?
>
> Greg
>
> On Tue, Aug 12, 2008 at 9:17 PM, Terence Parr <parrt at cs.usfca.edu> wrote:
>>
>> On Aug 12, 2008, at 6:10 PM, Grzegorz Cieslewski wrote:
>>
>>> Hi,
>>>
>>> In 3.1b2 (as included in antlrworks 1.2b5) the following seem to work:
>>>
>>> Case1:
>>> (listA+=number | listA+=id)+ -> ^(EXPR $listA+)
>>>
>>> On the other hand this syntax properly compiles but crashes on runtime
>>> Case2:
>>> (listA+=(number | id))+ -> ^(EXPR $listA+)
>>> Exception in thread "main"
>>> org.antlr.runtime.tree.RewriteEarlyExitException
>>>        at G4Parser.expr(G4Parser.java:238)
>>>        at __Test__.main(__Test__.java:14)
>>
>> Weird...i thought sets were always broken (still)...hmm...oh, syntax is ok
>> but runtime not yet.
>>
>> so, for now, manually add to list :(
>>
>>>
>>>
>>> When compiled with 3.1 I get errors:
>>> In Case1:
>>> ANTLR Parser Generator  Version 3.1 (August 12, 2008)  1989-2008
>>> G4Parser.java:88: incompatible types
>>> found   : G4Parser.number_return
>>> required: G4Parser.id_return
>>>                    listA=number();
>>
>> Oh shit...i changed that to be more specific but now it's tied to what rule
>> you call; for += you actually only care it's a rule. crap!  That is an
>> issue.
>>
>> Ter
>>
>
>
>
> --
> =====================================================
> Grzegorz Cieslewski
> Research Assistant
> High-performance Computing & Simulation (HCS) Research Laboratory
> University of Florida, Dept. of Electrical and Computer Engineering
> 330 Benton Hall, Gainesville, FL, 32611-6200
> Phone: (352) 392-9041
> Email: cieslewski at hcs.ufl.edu
> Web: www.hcs.ufl.edu
> =====================================================
>



-- 
=====================================================
Grzegorz Cieslewski
Research Assistant
High-performance Computing & Simulation (HCS) Research Laboratory
University of Florida, Dept. of Electrical and Computer Engineering
330 Benton Hall, Gainesville, FL, 32611-6200
Phone: (352) 392-9041
Email: cieslewski at hcs.ufl.edu
Web: www.hcs.ufl.edu
=====================================================