This causes spurious query cycles.
This PR also includes an update to Salsa, which gives us db events on
cycle iteration, so we can write tests asserting the absence of a cycle.
## Summary
Update Salsa to pull in https://github.com/salsa-rs/salsa/pull/788 which
fixes the, by now, famous *access to field whilst the value is being
initialized*.
This PR also re-enables all tests that previously triggered the panic.
## Test Plan
`cargo test`
This PR contains the following updates:
| Package | Type | Update | Change |
|---|---|---|---|
| [clap](https://redirect.github.com/clap-rs/clap) |
workspace.dependencies | patch | `4.5.34` -> `4.5.35` |
---
> [!WARNING]
> Some dependencies could not be looked up. Check the Dependency
Dashboard for more information.
---
### Release Notes
<details>
<summary>clap-rs/clap (clap)</summary>
###
[`v4.5.35`](https://redirect.github.com/clap-rs/clap/blob/HEAD/CHANGELOG.md#4535---2025-04-01)
[Compare
Source](https://redirect.github.com/clap-rs/clap/compare/v4.5.34...v4.5.35)
##### Fixes
- *(help)* Align positionals and flags when put in the same
`help_heading`
- *(help)* Don't leave space for shorts if there are none
</details>
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## Summary
Use more local `expect(dead_code)` suppressions instead of a global
`allow(dead_code)` in `lib.rs`.
Remove some methods that are either easy to add later, are less likely
to be needed for red knot, or it's unclear if we'd add it the same way
as in ruff.
## Summary
This is a follow up to the goto type definition PR. Specifically, that
we want to avoid exposing too many semantic model internals publicly.
I want to get some feedback on the approach taken. I think it goes into
the right direction but I'm not super happy with it.
The basic idea is that we add a `Type::definition` method which does the
"goto type definition". The parts that I think make it awkward:
* We can't directly return `Definition` because we don't create a
`Definition` for modules (but we could?). Although I think it makes
sense to possibly have a more public wrapper type anyway?
* It doesn't handle unions and intersections. Mainly because not all
elements in an intersection may have a definition and we only want to
show a navigation target for intersections if there's only a single
positive element (besides maybe `Unknown`).
An alternative design or an addition to this design is to introduce a
`SemanticAnalysis(Db)` struct that has methods like
`type_definition(&self, type)` which explicitly exposes the methods we
want. I don't feel comfortable design this API yet because it's unclear
how fine granular it has to be (and if it is very fine granular,
directly using `Type` might be better after all)
## Test Plan
`cargo test`
Update to latest Salsa main branch, so as to get a baseline for
measuring the perf effect of https://github.com/salsa-rs/salsa/pull/786
on red-knot in isolation from other recent changes in Salsa main branch.
## Summary
This PR adds Goto type definition to the playground, using the same
infrastructure as the LSP.
The main *challenge* with implementing this feature was that the editor
can now participate in which tab is open.
## Known limitations
The same as for the LSP. Most notably, navigating to types defined in
typeshed isn't supported.
## Test Plan
https://github.com/user-attachments/assets/22dad7c8-7ac7-463f-b066-5d5b2c45d1fe
## Summary
Implement basic *Goto type definition* support for Red Knot's LSP.
This PR also builds the foundation for other LSP operations. E.g., Goto
definition, hover, etc., should be able to reuse some, if not most,
logic introduced in this PR.
The basic steps of resolving the type definitions are:
1. Find the closest token for the cursor offset. This is a bit more
subtle than I first anticipated because the cursor could be positioned
right between the callee and the `(` in `call(test)`, in which case we
want to resolve the type for `call`.
2. Find the node with the minimal range that fully encloses the token
found in 1. I somewhat suspect that 1 and 2 could be done at the same
time but it complicated things because we also need to compute the spine
(ancestor chain) for the node and there's no guarantee that the found
nodes have the same ancestors
3. Reduce the node found in 2. to a node that is a valid goto target.
This may require traversing upwards to e.g. find the closest expression.
4. Resolve the type for the goto target
5. Resolve the location for the type, return it to the LSP
## Design decisions
The current implementation navigates to the inferred type. I think this
is what we want because it means that it correctly accounts for
narrowing (in which case we want to go to the narrowed type because
that's the value's type at the given position). However, it does have
the downside that Goto type definition doesn't work whenever we infer `T
& Unknown` because intersection types aren't supported. I'm not sure
what to do about this specific case, other than maybe ignoring `Unkown`
in Goto type definition if the type is an intersection?
## Known limitations
* Types defined in the vendored typeshed aren't supported because the
client can't open files from the red knot binary (we can either
implement our own file protocol and handler OR extract the typeshed
files and point there). See
https://github.com/astral-sh/ruff/issues/17041
* Red Knot only exposes an API to get types for expressions and
definitions. However, there are many other nodes with identifiers that
can have a type (e.g. go to type of a globals statement, match patterns,
...). We can add support for those in separate PRs (after we figure out
how to query the types from the semantic model). See
https://github.com/astral-sh/ruff/issues/17113
* We should have a higher-level API for the LSP that doesn't directly
call semantic queries. I intentionally decided not to design that API
just yet.
## Test plan
https://github.com/user-attachments/assets/fa077297-a42d-4ec8-b71f-90c0802b4edb
Goto type definition on a union
<img width="1215" alt="Screenshot 2025-04-01 at 13 02 55"
src="https://github.com/user-attachments/assets/689cabcc-4a86-4a18-b14a-c56f56868085"
/>
Note: I recorded this using a custom typeshed path so that navigating to
builtins works.
This PR contains the scaffolding for a new control flow graph
implementation, along with its application to the `unreachable` rule. At
the moment, the implementation is a maximal over-approximation: no
control flow is modeled and all statements are counted as reachable.
With each additional statement type we support, this approximation will
improve.
So this PR just contains:
- A `ControlFlowGraph` struct and builder
- Support for printing the flow graph as a Mermaid graph
- Snapshot tests for the actual graphs
- (a very bad!) reimplementation of `unreachable` using the new structs
- Snapshot tests for `unreachable`
# Instructions for Viewing Mermaid snapshots
Unfortunately I don't know how to convince GitHub to render the Mermaid
graphs in the snapshots. However, you can view these locally in VSCode
if you install an extension that supports Mermaid graphs in Markdown,
and then add this to your `settings.json`:
```json
"files.associations": {
"*.md.snap": "markdown",
}
```
## Summary
This PR adds a new but so far empty and unused `red_knot_ide` crate.
This new crate's purpose is to implement IDE-specific functionality,
such as go to definition, hover, completion, etc., which are used by
both the LSP and the playground.
The crate itself doesn't depend on `lsptypes`. The idea is that the
facade crates (e.g., `red_knot_server`) convert external to internal
types.
Not only allows this to share the logic between server and playground,
it also ensures that the core functionality is easier to test because it
can be tested without needing a full LSP.
## Test Plan
`cargo build`
This PR contains the following updates:
| Package | Type | Update | Change |
|---|---|---|---|
| [clap](https://redirect.github.com/clap-rs/clap) |
workspace.dependencies | patch | `4.5.32` -> `4.5.34` |
---
> [!WARNING]
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---
### Release Notes
<details>
<summary>clap-rs/clap (clap)</summary>
###
[`v4.5.34`](https://redirect.github.com/clap-rs/clap/blob/HEAD/CHANGELOG.md#4534---2025-03-27)
[Compare
Source](https://redirect.github.com/clap-rs/clap/compare/v4.5.33...v4.5.34)
##### Fixes
- *(help)* Don't add extra blank lines with `flatten_help(true)` and
subcommands without arguments
###
[`v4.5.33`](https://redirect.github.com/clap-rs/clap/blob/HEAD/CHANGELOG.md#4533---2025-03-26)
[Compare
Source](https://redirect.github.com/clap-rs/clap/compare/v4.5.32...v4.5.33)
##### Fixes
- *(error)* When showing the usage of a suggestion for an unknown
argument, don't show the group
</details>
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This PR contains the following updates:
| Package | Type | Update | Change |
|---|---|---|---|
| [tempfile](https://stebalien.com/projects/tempfile-rs/)
([source](https://redirect.github.com/Stebalien/tempfile)) |
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<summary>Stebalien/tempfile (tempfile)</summary>
###
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[Compare
Source](https://redirect.github.com/Stebalien/tempfile/compare/v3.19.0...v3.19.1)
- Don't unlink temporary files immediately on Windows (fixes
[#​339](https://redirect.github.com/Stebalien/tempfile/issues/339)).
Unfortunately, this seemed to corrupt the file object (possibly a
Windows kernel bug) in rare cases and isn't strictly speaking necessary.
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This PR contains the following updates:
| Package | Type | Update | Change |
|---|---|---|---|
| [mimalloc](https://redirect.github.com/purpleprotocol/mimalloc_rust) |
workspace.dependencies | patch | `0.1.43` -> `0.1.44` |
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###
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Version 0.1.44
[Compare
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##### Changes
- Mimalloc v2.2.2
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## 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~~
## Summary
Another salsa upgrade.
The main motivation is to stay on a recent salsa version because there
are still a lot of breaking changes happening.
The most significant changes in this update:
* Salsa no longer derives `Debug` by default. It now requires
`interned(debug)` (or similar)
* This version ships the foundation for garbage collecting interned
values. However, this comes at the cost that queries now track which
interned values they created (or read). The micro benchmarks in the
salsa repo showed a significant perf regression. Will see if this also
visible in our benchmarks.
## Test Plan
`cargo test`
This PR contains the following updates:
| Package | Type | Update | Change |
|---|---|---|---|
| [clap](https://redirect.github.com/clap-rs/clap) |
workspace.dependencies | patch | `4.5.31` -> `4.5.32` |
---
> [!WARNING]
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### Release Notes
<details>
<summary>clap-rs/clap (clap)</summary>
###
[`v4.5.32`](https://redirect.github.com/clap-rs/clap/blob/HEAD/CHANGELOG.md#4532---2025-03-10)
[Compare
Source](https://redirect.github.com/clap-rs/clap/compare/v4.5.31...v4.5.32)
##### Features
- Add `Error::remove`
##### Documentation
- *(cookbook)* Switch from `humantime` to `jiff`
- *(tutorial)* Better cover required vs optional
##### Internal
- Update `pulldown-cmark`
</details>
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This PR contains the following updates:
| Package | Type | Update | Change |
|---|---|---|---|
| [quote](https://redirect.github.com/dtolnay/quote) |
workspace.dependencies | patch | `1.0.39` -> `1.0.40` |
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###
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- Optimize construction of lifetime tokens
([#​293](https://redirect.github.com/dtolnay/quote/issues/293),
thanks [@​aatifsyed](https://redirect.github.com/aatifsyed))
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This PR contains the following updates:
| Package | Type | Update | Change |
|---|---|---|---|
| [ordermap](https://redirect.github.com/indexmap-rs/ordermap) |
workspace.dependencies | patch | `0.5.5` -> `0.5.6` |
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<summary>indexmap-rs/ordermap (ordermap)</summary>
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[`v0.5.6`](https://redirect.github.com/indexmap-rs/ordermap/blob/HEAD/RELEASES.md#056-2025-03-10)
[Compare
Source](https://redirect.github.com/indexmap-rs/ordermap/compare/0.5.5...0.5.6)
- Added `ordermap_with_default!` and `orderset_with_default!` to be used
with
alternative hashers, especially when using the crate without `std`.
- Updated the `indexmap` dependency to version 2.8.0.
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This PR contains the following updates:
| Package | Type | Update | Change |
|---|---|---|---|
| [env_logger](https://redirect.github.com/rust-cli/env_logger) |
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##### Internal
- Replaced `humantime` with `jiff`
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This PR contains the following updates:
| Package | Type | Update | Change |
|---|---|---|---|
| [indexmap](https://redirect.github.com/indexmap-rs/indexmap) |
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[Compare
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- Added `indexmap_with_default!` and `indexset_with_default!` to be used
with
alternative hashers, especially when using the crate without `std`.
- Implemented `PartialEq` between each `Slice` and `[]`/arrays.
- Removed the internal `rustc-rayon` feature and dependency.
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## Summary
Follow-up release for Ruff v0.10 that now includes the following two
changes that we intended to ship but slipped:
* Changes to how the Python version is inferred when a `target-version`
is not specified (#16319)
* `blanket-noqa` (`PGH004`): Also detect blanked file-level noqa
comments (and not just line level comments).
## Test plan
I verified that the binary built on this branch respects the
`requires-python` setting
([logs](https://www.diffchecker.com/qyJWYi6W/), left: v0.10, right:
v0.11)
Pulls in the latest Salsa main branch, which supports fixpoint
iteration, and uses it to handle all query cycles.
With this, we no longer need to skip any corpus files to avoid panics.
Latest perf results show a 6% incremental and 1% cold-check regression.
This is not a "no cycles" regression, as tomllib and typeshed do trigger
some definition cycles (previously handled by our old
`infer_definition_types` fallback to `Unknown`). We don't currently have
a benchmark we can use to measure the pure no-cycles regression, though
I expect there would still be some regression; the fixpoint iteration
feature in Salsa does add some overhead even for non-cyclic queries.
I think this regression is within the reasonable range for this feature.
We can do further optimization work later, but I don't think it's the
top priority right now. So going ahead and acknowledging the regression
on CodSpeed.
Mypy primer is happy, so this doesn't regress anything on our
currently-checked projects. I expect it probably unlocks adding a number
of new projects to our ecosystem check that previously would have
panicked.
Fixes#13792Fixes#14672
This PR contains the following updates:
| Package | Type | Update | Change |
|---|---|---|---|
| [indoc](https://redirect.github.com/dtolnay/indoc) |
workspace.dependencies | patch | `2.0.5` -> `2.0.6` |
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### Release Notes
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<summary>dtolnay/indoc (indoc)</summary>
###
[`v2.0.6`](https://redirect.github.com/dtolnay/indoc/releases/tag/2.0.6)
[Compare
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- Documentation improvements
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This PR contains the following updates:
| Package | Type | Update | Change |
|---|---|---|---|
| [syn](https://redirect.github.com/dtolnay/syn) |
workspace.dependencies | patch | `2.0.98` -> `2.0.100` |
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- Add `Visit::visit_token_stream`, `VisitMut::visit_token_stream_mut`,
`Fold::fold_token_stream` for processing TokenStream during syntax tree
traversals
([#​1852](https://redirect.github.com/dtolnay/syn/issues/1852))
###
[`v2.0.99`](https://redirect.github.com/dtolnay/syn/releases/tag/2.0.99)
[Compare
Source](https://redirect.github.com/dtolnay/syn/compare/2.0.98...2.0.99)
- Documentation improvements
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This PR contains the following updates:
| Package | Type | Update | Change |
|---|---|---|---|
| [thiserror](https://redirect.github.com/dtolnay/thiserror) |
workspace.dependencies | patch | `2.0.11` -> `2.0.12` |
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###
[`v2.0.12`](https://redirect.github.com/dtolnay/thiserror/releases/tag/2.0.12)
[Compare
Source](https://redirect.github.com/dtolnay/thiserror/compare/2.0.11...2.0.12)
- Prevent elidable_lifetime_names pedantic clippy lint in generated impl
([#​413](https://redirect.github.com/dtolnay/thiserror/issues/413))
</details>
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Dylan
Carl Meyer
Micha Reiser
renovate[bot]
Brent Westbrook