[antlr-interest] error locations: how to emulate #line functionality in Java?
Terence Parr
parrt at cs.usfca.edu
Thu Nov 25 10:24:31 PST 2004
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.
Hi,
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. :)
Ter
--
CS Professor & Grad Director, University of San Francisco
Creator, ANTLR Parser Generator, http://www.antlr.org
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