# Attach comments to ppx generated code?
**URL:** https://discuss.ocaml.org/t/attach-comments-to-ppx-generated-code/11264
**Category:** Learning
**Tags:** ppx
**Created:** [January 27, 2023, 3:01pm UTC](https://discuss.ocaml.org/t/attach-comments-to-ppx-generated-code/11264 "2023-01-27T15:01:09Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@enetsee](https://discuss.ocaml.org/u/enetsee)
#### Post date: [January 27, 2023, 3:01pm UTC](https://discuss.ocaml.org/t/attach-comments-to-ppx-generated-code/11264/1 "2023-01-27T15:01:09Z")
Is it possible to attach comments to code generated by a ppx?
I’d like to include a comment on types produced by my preprocessor (which will show up when hovering in VSCode) directing users towards the ppx documentation . I realise that comments are not part of the AST but wondered if there was a workaround
Thanks,
Michael
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### Author:  [@octachron](https://discuss.ocaml.org/u/octachron)
#### Post date: [January 27, 2023, 3:04pm UTC](https://discuss.ocaml.org/t/attach-comments-to-ppx-generated-code/11264/2 "2023-01-27T15:04:10Z")
You could attach documentation comments which are parts of the ASTs (and can be seen by documentation tools).
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### Author:  [@enetsee](https://discuss.ocaml.org/u/enetsee)
#### Post date: [January 27, 2023, 3:06pm UTC](https://discuss.ocaml.org/t/attach-comments-to-ppx-generated-code/11264/3 "2023-01-27T15:06:32Z")
Ah, is this `[@@ocaml.doc ...]`? I hadn’t realised comments were converted to attributes in this way
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### Author:  [@emillon](https://discuss.ocaml.org/u/emillon)
#### Post date: [January 27, 2023, 4:10pm UTC](https://discuss.ocaml.org/t/attach-comments-to-ppx-generated-code/11264/4 "2023-01-27T16:10:15Z")
Yes, they’re attributes with a `ocaml.doc` name. This is the equivalent of doc-comments `(**... *)`. Normal comments `(* ... *)` are not part of the AST.