Parser portability issues about gluon

[LBeernaertProton]

As of c8f22fc, Gluon no longer depends on C++ libraries. The issue is now considered resolved.

[LBeernaertProton]

To all those who are interested, work has begun on rewriting the C++ parser dependencies in pure Go.

[jameshoulahan]

Hi @ljanyst, thanks for your interest in the library and in our products!

I definitely understand your concerns regarding portability and unnecessary complexity. Indeed, we used ANTLR's go target earlier in this project's history, and we already use it in another library used by bridge, see go-rfc5322, but we were forced to switch to C++ because the generated go code was horribly slow.

Longer term, we are interested in investigating better solutions to parsing the IMAP commands, but for now, we will stick with the current approach, as it is the simplest way to get a high quality parser for all of our officially supported architectures.

[ljanyst]

Thanks for taking a look!

[kortschak]

@jameshoulahan Did you take a look at using ragel for this?

[jameshoulahan]

@kortschak no I didn't, I wasn't aware of it at the time. What would be the benefits of using it?

[kortschak]

It's significantly simpler than antlr.