ocaml-mlx / ocaml-mlx/mlx

usage in toplevel ?

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Dominant language
OCaml
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2d 1h
Merged PRs (30d)
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Description

First, thanks for this awesome library !

I couldn't find a way to use it in a toplevel though. I tried some things, like :

$ ocaml -ppx mlx-pp
OCaml version 5.4.1
Enter #help;; for help.

# #use_output "dune top";;
# JSX.render <h1>(JSX.string "ok")</h1>;;
Error: Syntax error

I think I read somewhere a long time ago that there was a way to activate preprocesses in utop. Or maybe it was that ppxs are automatically activated. But mlx-pp is not an ast preprocessor like reason-react-ppx, is it ? So is there a way to benefit from its usage in any toplevel ? That would be awesome !

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First steps

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  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by reproducing the reported command with ocaml -ppx mlx-pp, #use_output "dune top", and the JSX expression. Read how mlx-pp interacts with the OCaml toplevel and compare that with the mention of utop and reason-react-ppx. Done means either JSX works in a supported toplevel workflow or the supported limitation and usage are documented.

Written by the indexing model from the issue text.

Assessment

Tech stack
ocaml
Domain
compilers, tooling
Issue type
Feature
Difficulty
4/5
Estimated time
3-5 days
Activity status
Active
Clarity
Needs clarification
Newbie friendliness
38/100

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