Catching (and keeping) all comments with ANTLR

Question

I\'m writing a grammar in ANTLR that parses Java source files into ASTs for later analysis. Unlike other parsers (like JavaDoc) I\'m trying to keep all of the comments. This

Answer 1

For ANTLR v3:

The whitespace tokens are usually not processed by parser, but they are still captured on the HIDDEN channel.

If you use BufferedTokenStream, you can get to list of all tokens through it and do a postprocessing, adding them as needed.