Red Knot Playground #12681
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Red Knot Playground #12681
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CodSpeed Performance ReportMerging #12681 will not alter performanceComparing Summary
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MichaReiser
commented
Aug 14, 2024
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Hey! Any updates about this? Do we have any sort of playground for red knot at the moment? |
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No, there's no update. This is blocked on adding WASM support to salsa. See https://salsa.zulipchat.com/#narrow/stream/333573-Contributing-to-Salsa/topic/WASM.20support |
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I plan to pick this up again on the side. It's now unblocked as we use salsa's new fixpoint infrastructure that doesn't rely on panics to resolve cycles. |
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dcreager
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Mar 18, 2025
* main: [playground] Avoid concurrent deployments (#16834) [red-knot] Infer `lambda` return type as `Unknown` (#16695) [red-knot] Move `name` field on parameter kind (#16830) [red-knot] Emit errors for more AST nodes that are invalid (or only valid in specific contexts) in type expressions (#16822) [playground] Use cursor for clickable elements (#16833) [red-knot] Deploy playground on main (#16832) Red Knot Playground (#12681) [syntax-errors] PEP 701 f-strings before Python 3.12 (#16543)
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Summary
This PR adds a playground for Red Knot
Screencast.from.2024-08-14.10-33-54.webm
Sharing does work 😆 I just forgot to start wrangler.
It supports:
Future extensions:
pyproject.tomlwould just be another file.Blockers
Salsa usescatch_unwindto break cycles, which Red Knot uses extensively when inferring types in the standard library.However, WASM (at least
wasm32-unknown-unknown) doesn't supportcatch_unwindtoday, so the playground always crashes when the type inference encounters a cycle.I created a discussion in the salsa zulip to see if it would be possible to not use catch unwind to break cycles.Rust tracking issue for WASM catch unwind supportI 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 usewasm32-unknown-emscriptenbut it's rather painful to build