[antlr-interest] error locations: how to emulate #line functionality in Java?

[Alexey Demakov]

From: "Terence Parr" <parrt at cs.usfca.edu>
> On Nov 25, 2004, at 8:56 AM, Alexey Demakov wrote:
> > In C language there are preprocessor directive #line used by lex/yacc
> > that tell compiler which file name and line number should be used in 
> > error messages.
> > As far as I know, Java doesn't provide such functionality in any way.
> > So, I see the only method to emulate it is to store translation table 
> > with correspondence
> > between source and generated files and line numbers and translate 
> > compiler
> > error messages back at source level.
> > May be you have better ideas? If solution will be suitable not only 
> > for Java - it will be great.
> 
> I believe that if you toy with the .class files you can change the 
> file/line info table. :)  I plan on doing that for my cyclic DFAs for 
> which I generate byte codes directly.  I think I can get them to point 
> back into the grammar file. :)

It is useful for source level debugging, but I primary interested in
translation of compile-time error messages.

Regards,
Alexey

-----
Alexey Demakov
TreeDL: Tree Description Language: http://treedl.sourceforge.net
RedVerst Group: http://www.unitesk.com




 
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