[antlr-interest] Problem while compiling/debugging: int cannot be dereferenced

[Dominik Halfkann]

Here are the generated java parts. But I think it's weird, if it's not an
ANTLR problem, that would mean ANTLR builts java-files with errors, doesn't
it? :o
Moreover, I've copy-pasted this gramma part from an example (
http://www.antlr.org/wiki/display/ANTLR3/Expression+evaluator), so this
shouldn't happen at all. :(
I will check the problem with eclipse late on, but It's weird that the
generated .java is incorrect imo.

public final int mathAtom() throws RecognitionException {
    int value = 0;
    Token i=null;
    int e = 0;

    [...]
    i=(Token)match(input,Integer,FOLLOW_Integer_in_mathAtom984); if
(state.failed) return value;
    [...]
    value = Integer.parseInt((i!=null?i.getText():null));
    [...]
}

2011/5/14 Jeff Hair <knifed at gmail.com>

> http://www.coderanch.com/t/379354/java/java/int-not-dereferenced-means
>
> <http://www.coderanch.com/t/379354/java/java/int-not-dereferenced-means>Doesn't
> look like it's an ANTLR problem. Check the data type of value.
>
> On Sat, May 14, 2011 at 8:50 AM, Dominik Halfkann <
> dominik.halfkann at googlemail.com> wrote:
>
>> Hello everybody,
>>
>> I have a problem with ANTLR and I hope it's ok that I'm asking that here.
>> I
>> also posted something in the forum, but it seems to be very inactive
>> depending on other posts I saw there...
>>
>> (from http://www.jguru.com/forums/view.jsp?EID=1639158)
>> When I want to debug/compile my grammar, I allways get the error message:
>>
>> [14:03:38] D:\[...]\ANTLR Parser\output\SGLParser.java:2532: int
>> cannot be dereferenced
>> [14:03:38]                       value =
>> Integer.parseInt((i!=null?i.getText():null));
>>
>> I don't have an explanation for that, maybe someone can help me here. Here
>> are the important code fragments:
>>
>> grammar SGL;
>> options {
>>        backtrack = true;
>>        memoize = true;
>> }
>>
>> [...]
>>
>> mathAtom returns [int value]
>>    :   '(' e=mathExpression ')' {$value = $e.value;}
>>    |   i=Integer {$value = Integer.parseInt($i.text);}
>>    ;
>>
>> [...]
>>
>> Integer
>>    :   '0'..'9'+
>>    ;
>>
>>
>> Thank you in advance
>>
>> Dominik
>>
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>
>