ocaml-ppx
How to know which is the oldest version of ppxlib for each version of the AST ?
It seems like that should be part of the documentation somewhere, but it doesn't look like it. In particular, I would like to answer the simple question: "What's the oldest version of ppxlib for the AST version I'm currently using ?"
Yes, that information should indeed be easy to find. Given an AST, I understand that you would like to find the oldest version of ppxlib that supports all its syntax. Is that right?
One way to find that out is to have a look at the release notes: you have to look for the entry "Bump AST to <the version you're interested in>". For the 4.12 AST that's ppxlib 0.22.0 (see release notes); for the 4.11 AST it's ppxlib 0.18.0 (see release notes) and so on. Would you expect to find that information somewhere else apart from the release notes? Where would you expect to find it?
Where would you expect to find it?
In the readme, with a small table: AST version/ppxlib version(s).
Ok, that sounds good to me. I'll come back to this when I get to improve the documentation. Thanks!
By the way, also have a look at this . That's not an informative approach as you're proposing, but it would be a means to restrict to the ppxlib versions with the AST you need. If we get to implement that, would that also meet your purpose?