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

[Dominik Halfkann]

You're absolutely right, sry I gave up so early on ANTLR. Now everything
works fine and I'm surprised how easy it is to work with it. Thank you for
your help!

2011/5/15 John B. Brodie <jbb at acm.org>

> You have chosen a rule name that clashes with a Java class name, e.g.
> Integer.
>
> Select another name for your current Integer lexer rule.
>
> In my opinion this is not an ANTLR problem, rather it is a user error.
>
> On Sat, 2011-05-14 at 23:45 +0200, Dominik Halfkann wrote:
> > 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
> > >>
> > >> List: http://www.antlr.org/mailman/listinfo/antlr-interest
> > >> Unsubscribe:
> > >>
> http://www.antlr.org/mailman/options/antlr-interest/your-email-address
> > >>
> > >
> > >
> >
> > List: http://www.antlr.org/mailman/listinfo/antlr-interest
> > Unsubscribe:
> http://www.antlr.org/mailman/options/antlr-interest/your-email-address
>
>
>
>