Actually, i get
/tmp $ a T.g
error(211): T.g:3:3: [fatal] rule a has non-LL(*) decision due to recursive
rule invocations reachable from alts 1,2. Resolve by left-factoring or using
syntactic predicates or using backtrack=true option.
for
tree grammar T;
options {ASTLabelType=CommonTree;}
a : ^(ID recurse ID ID) SEMI
| ^(ID recurse ID) SEMI
{System.out.println($ID+", "+$b.text);}
;
recurse : '(' recurse ')' | INT ;
Ter
On Nov 21, 2010, at 2:07 PM, Terence Parr wrote:
> Hi Jamie, i'm looking at this to see if there is a bug i can fix for 3.3. So
> antlr silently accepted the first snippet even though it couldn't produce a
> DFA?
> Ter
> On Apr 1, 2010, at 10:19 AM, James Briant wrote:
>
>> Once I managed to get ANTLR to give me the error message, the problem was
>> easy to solve. I had these two lines:
>>
>> | ^(IF parenthesizedExpression statement statement)
>> | ^(IF parenthesizedExpression statement)
>>
>> And I just changed it to:
>>
>> | ^(IF parenthesizedExpression statement statement?)
>>
>> And now it works fine.
>>
>> So the problem was definitely an exception in the DFA constructor that was
>> then caught, but ignored, with no warning or error. Once I forced it to
>> report the error, I could fix it.
>>
>> Jamie
>>
>> List: http://www.antlr.org/mailman/listinfo/antlr-interest
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