Micha Reiser c027979851

Red Knot Playground (#12681) ...

## Summary

This PR adds a playground for Red Knot

[Screencast from 2024-08-14
10-33-54.webm](https://github.com/user-attachments/assets/ae81d85f-74a3-4ba6-bb61-4a871b622f05)

Sharing does work 😆 I just forgot to start wrangler. 


It supports:

* Multiple files
* Showing the AST
* Showing the tokens
* Sharing
* Persistence to local storage

Future extensions:

* Configuration support: The `pyproject.toml` would *just* be another
file.
* Showing type information on hover

## Blockers

~~Salsa uses `catch_unwind` to break cycles, which Red Knot uses
extensively when inferring types in the standard library.
However, WASM (at least `wasm32-unknown-unknown`) doesn't support
`catch_unwind` today, so the playground always crashes when the type
inference encounters a cycle.~~

~~I created a discussion in the [salsa
zulip](https://salsa.zulipchat.com/#narrow/stream/333573-salsa-3.2E0/topic/WASM.20support)
to see if it would be possible to **not** use catch unwind to break
cycles.~~

~~[Rust tracking issue for WASM catch unwind
support](https://github.com/rust-lang/rust/issues/118168)~~

~~I tried to build the WASM with the nightly compiler option but ran
into problems because wasm-bindgen doesn't support WASM-exceptions. We
could try to write the binding code by hand.~~

~~Another alternative is to use `wasm32-unknown-emscripten` but it's
rather painful to build~~

2025-03-18 17:17:11 +01:00

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