[antlr-interest] #include handling - newbie question

[Ric Klaren]

On Wed, Jul 14, 2004 at 04:47:16PM -0000, Bill Clark wrote:
> I'm looking for tips on the simplest way to handle #include 
> directives in a file to be parsed by ANTLR. I've seen the advice 
> that it's not a problem that ANTLR is well-suited to solve, but I'm 
> not sure what's the best way to go about this. I can easily write a 
> preprocessor that just inserts the contents of the included file in 
> the stream that's handed to the lexer, but then I don't see a good 
> way to provide line numbers/filenames in error messages. 
> 
> It seems like there ought to be a simple way to deal with this 
> general problem; am I missing it?

You might get some inspiration from this code:

http://wwwhome.cs.utwente.nl/~klaren/antlr/CPPParser.tar.bz2

It's a modification of the C++ parser from David Wigg. It adds custom
tokens with file names and rudimentary #include handling inclusive include
guards. (it was a bit of an experiment the code is rough be sure to read
the readme coming with it) One extra step that could be added is custom
ast's with file/line info. The includeFile C++ example Monty mentioned is a
lot simpler though if you're new to antlr.

Cheers,

Ric
--
-----+++++*****************************************************+++++++++-------
    ---- Ric Klaren ----- j.klaren at utwente.nl ----- +31 53 4893755  ----
-----+++++*****************************************************+++++++++-------
 "Don't call me stupid." "Oh, right. To call you stupid would be an insult
    to stupid people. I've known sheep that could outwit you! I've worn
              dresses with higher IQs!" --- A Fish Called Wanda



 
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