Re: [Sablecc-user] Modify the grammar file

[VO Duc Duy <duy.voduc@epfl.ch>]

Merci bien Etienne, I have solved the problem.
Actually, when defining some new keywords one should copy the 2 very
important files: lexer.dat and parser.dat to the lexer and parser class
directories.
About recompiling all the files, it is fine, because I make the compile
commands explicitly in a script, then run the script. So they're all
done (by checking the time of class files)

Thank you.
Duy.

Etienne Gagnon wrote:

> Hi D.,
>
> Have you tried deleting all class files then recompiling all Java 
> sources?
> Sometimes the Java compiler does not recompile all classes, and this can
> cause problems.
>
> If this does not help, you will need to provide us with more information
> (like the grammar file).
>
> Etienne
>
> VO Duc Duy wrote:
>
> > I wanted to add some new keyword in an existing compiler, so I added 
> > it in Tokens, then Productions. Then I use sablecc (2.9) to 
> > regenerate this modified grammar, then compile all the generated 
> > files in node/analysis/parser/lexer, they are all ok. But when I run 
> > the parser, it always shows the exception like:
> >
> > java.lang.ClassCastException
> >  at parser.Parser.new51(Parser.java:1058)
> >  at parser.Parser.parse(Parser.java:296)
> >
> > I didn't change anything in the input file, I didn't use my new 
> > keyword in the input file yet, but it always shows this exception.
> >
> > Anybody has idea of this error?
> > Or please tell me how to add some new keywords in an existing grammar 
> > file?
> >
> > Thank you in advance.
> > D.