Summary
--
Closes#19467 and also removes the warning about using Python 3.14
without
preview enabled.
I also bumped `PythonVersion::default` to 3.9 because it reaches EOL
this month,
but we could also defer that for now if we wanted.
The first three commits are related to the `latest` bump to 3.14; the
fourth commit
bumps the default to 3.10.
Note that this PR also bumps the default Python version for ty to 3.10
because
there was a test asserting that it stays in sync with
`ast::PythonVersion`.
Test Plan
--
Existing tests
I spot-checked the ecosystem report, and I believe these are all
expected. Inbits doesn't specify a target Python version, so I guess
we're applying the default. UP007, UP035, and UP045 all use the new
default value to emit new diagnostics.
Resolves a crash when attempting to format code like:
```
from x import (a as # whatever
b)
```
Reworks the way comments are associated with nodes when parsing modules,
so that all possible comment positions can be retained and reproduced during
formatting.
Overall follows Black's formatting style for multi-line import statements.
Fixes issue #19138
## Summary
`infer_method_information` was previously calling
`ClassLiteral::to_class_type`, which uses the default-specialization of
a generic class. This specialized `ClassType` was later only used if the
class was non-generic, making the specialization irrelevant. The
implementation was still a bit confusing, so this PR proposes a way to
avoid turning the class literal into a `ClassType`.
## Summary
Fixes#20700
`else` and `elif` blocks could previously be deleted when applying a fix
for this rule. If an `else` or `elif` branch is detected the rule will
not trigger. So now the rule will only flag if it is safe.
## Summary
Use the type annotation of function parameters as bidirectional type
context when inferring the argument expression. For example, the
following example now type-checks:
```py
class TD(TypedDict):
x: int
def f(_: TD): ...
f({ "x": 1 })
```
Part of https://github.com/astral-sh/ty/issues/168.
We add an `inherited_generic_context` to the constructors of a generic
class. That lets us infer specializations of the class when invoking the
constructor. The constructor might itself be generic, in which case we
have to merge the list of typevars that we are willing to infer in the
constructor call.
Before we did that by tracking the two (and their specializations)
separately, with distinct `Option` fields/parameters. This PR updates
our call binding logic such that any given function call has _one_
optional generic context that we're willing to infer a specialization
for. If needed, we use the existing `GenericContext::merge` method to
create a new combined generic context for when the class and constructor
are both generic. This simplifies the call binding code considerably,
and is no more complex in the constructor call logic.
We also have a heuristic that we will promote any literals in the
specialized types of a generic class, but we don't promote literals in
the specialized types of the function itself. To handle this, we now
track this `should_promote_literals` property within `GenericContext`.
And moreover, we track this separately for each typevar, instead of a
single property for the generic context as a whole, so that we can
correctly merge the generic context of a constructor method (where the
option should be `false`) with the inherited generic context of its
containing class (where the option should be `true`).
---------
Co-authored-by: Alex Waygood <Alex.Waygood@Gmail.com>
## Summary
The union `T | U` can be validly simplified to `U` iff:
1. `T` is a subtype of `U` OR
2. `T` is equivalent to `U` OR
3. `U` is a union and contains a type that is equivalent to `T` OR
4. `T` is an intersection and contains a type that is equivalent to `U`
(In practice, the only situation in which 2, 3 or 4 would be true when
(1) was not true would be if `T` or `U` is a dynamic type.)
Currently we achieve these simplifications in the union builder by doing
something along the lines of `t.is_subtype_of(db, u) ||
t.is_equivalent_to_(db, u) ||
t.into_intersection().is_some_and(|intersection|
intersection.positive(db).contains(&u)) ||
u.into_union().is_some_and(|union| union.elements(db).contains(&t))`.
But this is both slow and misses some cases (it doesn't simplify the
union `Any | (Unknown & ~None)` to `Any`, for example). We can improve
the consistency and performance of our union simplifications by adding a
third type relation that sits in between `TypeRelation::Subtyping` and
`TypeRelation::Assignability`: `TypeRelation::UnionSimplification`.
This change leads to simpler, more user-friendly types due to the more
consistent simplification. It also lead to a pretty huge performance
improvement!
## Test Plan
Existing tests, plus some new ones.
## Summary
Resolves#20004
The implementation now supports guaranteed-mutable expressions in the
following cases:
- Tuple literals with mutable elements (supporting deep nesting)
- Generator expressions
- Named expressions (walrus operator) containing mutable components
Preserves original formatting for assignment value:
```python
# Test case
def f5(x=([1, ])):
print(x)
```
```python
# Fix before
def f5(x=(None)):
if x is None:
x = [1]
print(x)
```
```python
# Fix after
def f5(x=None):
if x is None:
x = ([1, ])
print(x)
```
The expansion of detected expressions and the new fixes gated behind
previews.
## Test Plan
- Added B006_9.py with a bunch of test cases
- Generated snapshots
---------
Co-authored-by: Igor Drokin <drokinii1017@gmail.com>
Co-authored-by: dylwil3 <dylwil3@gmail.com>
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## Summary
#19990 didn't completely fix the base vs. child conda environment
distinction, since it detected slightly different behavior than what I
usually see in conda. E.g., I see something like the following:
```
(didn't yet activate conda, but base is active)
➜ printenv | grep CONDA
CONDA_PYTHON_EXE=/opt/anaconda3/bin/python
CONDA_PREFIX=/opt/anaconda3
CONDA_DEFAULT_ENV=base
CONDA_EXE=/opt/anaconda3/bin/conda
CONDA_SHLVL=1
CONDA_PROMPT_MODIFIER=(base)
(activating conda)
➜ conda activate test
(test is an active conda environment)
❯ printenv | grep CONDA
CONDA_PREFIX=/opt/anaconda3/envs/test
CONDA_PYTHON_EXE=/opt/anaconda3/bin/python
CONDA_SHLVL=2
CONDA_PREFIX_1=/opt/anaconda3
CONDA_DEFAULT_ENV=test
CONDA_PROMPT_MODIFIER=(test)
CONDA_EXE=/opt/anaconda3/bin/conda
```
But the current behavior looks for `CONDA_DEFAULT_ENV =
basename(CONDA_PREFIX)` for the base environment instead of the child
environment, where we actually see this equality.
This pull request fixes that and updates the tests correspondingly.
## Test Plan
I updated the existing tests with the new behavior. Let me know if you
want more tests. Note: It shouldn't be necessary to test for the case
where we have `conda/envs/base`, since one should not be able to create
such an environment (one with the name of `CONDA_DEFAULT_ENV`).
---------
Co-authored-by: Aria Desires <aria.desires@gmail.com>
Resolves https://github.com/astral-sh/ruff/issues/20512
This PR expands FA102’s preview coverage to flag every
PEP 585-compatible API that breaks without from `from __future__ import
annotations`, including `collections.abc`. The rule now treats asyncio
futures, pathlib-style queues, weakref containers, shelve proxies, and
the full `collections.abc` family as generics once preview mode is
enabled.
Stable behavior is unchanged; the broader matching runs behind
`is_future_required_preview_generics_enabled`, letting us vet the new
diagnostics before marking them as stable.
I've also added a snapshot test that covers all of the newly supported
types.
Check out
https://docs.python.org/3/library/stdtypes.html#standard-generic-classes
for a list of commonly used PEP 585-compatible APIs.
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## Summary
<!-- What's the purpose of the change? What does it do, and why? -->
Fixes#20655
- Guard `argfile::expand_args_from` with contextual error handling so
missing @file arguments surface a friendly failure instead of panicking.
- Extract existing stderr reporting into `report_error` for reuse on
both CLI parsing failures and runtime errors.
## Test Plan
<!-- How was it tested? -->
Add a regression test to integration_test.rs.
---------
Co-authored-by: Brent Westbrook <36778786+ntBre@users.noreply.github.com>
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## Summary
<!-- What's the purpose of the change? What does it do, and why? -->
Fixes#19837
Track quote usage across the joiner and parts to choose a safe f-string
quote or skip the fix when both appear.
## Test Plan
<!-- How was it tested? -->
Add regression coverage to FLY002.py
Previously, we would always add `/{*filepath}` as our wildcard to match
descendant paths. But when the root is just `/` (as it can be in tests,
weird environments or in the ty playground), this causes a double `/`
and inhibits most descendant matches.
The regression test added in this commit fails without this fix.
Specifically, it panics because it can't find a file root for
`/project`.
Fixes#1277
This has the effect of emitting tracing events via `log`
whenever there isn't an active tracing subscriber present.
This makes it so `ty_wasm` logs tracing messages to the
JavaScript console automatically (via our use of `console_log`).
## Summary
closes: https://github.com/astral-sh/ty/issues/247
This PR adds support for variadic arguments to overload call evaluation.
This basically boils down to making sure that the overloads are not
filtered out incorrectly during the step 5 in the overload call
evaluation algorithm. For context, the step 5 tries to filter out the
remaining overloads after finding an overload where the materialization
of argument types are assignable to the parameter types.
The issue with the previous implementation was that it wouldn't unpack
the variadic argument and wouldn't consider the many-to-one (multiple
arguments mapping to a single variadic parameter) correctly. This PR
fixes that.
## Test Plan
Update existing test cases and resolve the TODOs.
## Summary
Currently we do not emit an error on this code:
```py
from ty_extensions import Not
def f[T](x: T, y: Not[T]) -> T:
x = y
return x
```
But we should do! `~T` should never be assignable to `T`.
This fixes a small regression introduced in
14fe1228e7 (diff-8049ab5af787dba29daa389bbe2b691560c15461ef536f122b1beab112a4b48aR1443-R1446),
where a branch that previously returned `false` was replaced with a
branch that returns `C::always_satisfiable` -- the opposite of what it
used to be! The regression occurred because we didn't have any tests for
this -- so I added some tests in this PR that fail on `main`. I only
spotted the problem because I was going through the code of
`has_relation_to_impl` with a fine toothcomb for
https://github.com/astral-sh/ruff/pull/20602😄
## Summary
Quoting from the newly added comment:
Module-level globals can be mutated externally. A `MY_CONSTANT = 1`
global might be changed to `"some string"` from code outside of the
module that we're looking at, and so from a gradual-guarantee
perspective, it makes sense to infer a type of `Literal[1] | Unknown`
for global symbols. This allows the code that does the mutation to type
check correctly, and for code that uses the global, it accurately
reflects the lack of knowledge about the type.
External modifications (or modifications through `global` statements)
that would require a wider type are relatively rare. From a practical
perspective, we can therefore achieve a better user experience by
trusting the inferred type. Users who need the external mutation to work
can always annotate the global with the wider type. And everyone else
benefits from more precise type inference.
I initially implemented this by applying literal promotion to the type
of the unannotated module globals (as suggested in
https://github.com/astral-sh/ty/issues/1069), but the ecosystem impact
showed a lot of problems (https://github.com/astral-sh/ruff/pull/20643).
I fixed/patched some of these problems, but this PR seems like a good
first step, and it seems sensible to apply the literal promotion change
in a second step that can be evaluated separately.
closes https://github.com/astral-sh/ty/issues/1069
## Ecosystem impact
This seems like an (unexpectedly large) net positive with 650 fewer
diagnostics overall.. even though this change will certainly catch more
true positives.
* There are 666 removed `type-assertion-failure` diagnostics, where we
were previously used the correct type already, but removing the
`Unknown` now leads to an "exact" match.
* 1464 of the 1805 total new diagnostics are `unresolved-attribute`
errors, most (1365) of which were previously
`possibly-missing-attribute` errors. So they could also be counted as
"changed" diagnostics.
* For code that uses constants like
```py
IS_PYTHON_AT_LEAST_3_10 = sys.version_info >= (3, 10)
```
where we would have previously inferred a type of `Literal[True/False] |
Unknown`, removing the `Unknown` now allows us to do reachability
analysis on branches that use these constants, and so we get a lot of
favorable ecosystem changes because of that.
* There is code like the following, where we previously emitted
`conflicting-argument-forms` diagnostics on calls to the aliased
`assert_type`, because its type was `Unknown | def …` (and the call to
`Unknown` "used" the type form argument in a non type-form way):
```py
if sys.version_info >= (3, 11):
import typing
assert_type = typing.assert_type
else:
import typing_extensions
assert_type = typing_extensions.assert_type
```
* ~100 new `invalid-argument-type` false positives, due to missing
`**kwargs` support (https://github.com/astral-sh/ty/issues/247)
## Typing conformance
```diff
+protocols_modules.py:25:1: error[invalid-assignment] Object of type `<module '_protocols_modules1'>` is not assignable to `Options1`
```
This diagnostic should apparently not be there, but it looks like we
also fail other tests in that file, so it seems to be a limitation that
was previously hidden by `Unknown` somehow.
## Test Plan
Updated tests and relatively thorough ecosystem analysis.
## Summary
Reformulation of the public symbol type inference test suite to use
class scopes instead of module scopes. This is in preparation for an
upcoming change to module-global scopes (#20664).
## Test Plan
Updated tests
This doesn't seem to be flaky in the sense of tests failing
non-deterministically, but they are flaky in the sense of unrelated
changes causing testing failures from the clauses of a constraint set
being rendered in different orders. This flakiness is because we're
using Salsa IDs to determine the order in which typevars appear in a
constraint set BDD, and those IDs are assigned non-deterministically.
The fix is ham-fisted but effective: sort the constraints in each
clause, and the clauses in each set, as part of the rendering process.
Constraint sets are only rendered in our test cases, so we don't need to
over-optimize this.
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## Summary
<!-- What's the purpose of the change? What does it do, and why? -->
Since we are trying to import both `AutoImport` and `SourceModuleMoved`,
the previous naming was not as descriptive. Renaming it to `Rename`
better reflects the intention.
## Test Plan
<!-- How was it tested? -->
no functionality change
## Summary
This PR uses the new `Diagnostic` type for rendering formatter
diagnostics. This allows the formatter to inherit all of the output
formats already implemented in the linter and ty. For example, here's
the new `full` output format, with the formatting diff displayed using
the same infrastructure as the linter:
<img width="592" height="364" alt="image"
src="https://github.com/user-attachments/assets/6d09817d-3f27-4960-aa8b-41ba47fb4dc0"
/>
<details><summary>Resolved TODOs</summary>
<p>
~~There are several limitiations/todos here still, especially around the
`OutputFormat` type~~:
- [x] A few literal `todo!`s for the remaining `OutputFormat`s without
matching `DiagnosticFormat`s
- [x] The default output format is `full` instead of something more
concise like the current output
- [x] Some of the output formats (namely JSON) have information that
doesn't make much sense for these diagnostics
The first of these is definitely resolved, and I think the other two are
as well, based on discussion on the design document. In brief, we're
okay inheriting the default `OutputFormat` and can separate the global
option into `lint.output-format` and `format.output-format` in the
future, if needed; and we're okay including redundant information in the
non-human-readable output formats.
My last major concern is with the performance of the new code, as
discussed in the `Benchmarks` section below.
A smaller question is whether we should use `Diagnostic`s for formatting
errors too. I think the answer to this is yes, in line with changes
we're making in the linter too. I still need to implement that here.
</p>
</details>
<details><summary>Benchmarks</summary>
<p>
The values in the table are from a large benchmark on the CPython 3.10
code
base, which involves checking 2011 files, 1872 of which need to be
reformatted.
`stable` corresponds to the same code used on `main`, while
`preview-full` and
`preview-concise` use the new `Diagnostic` code gated behind `--preview`
for the
`full` and `concise` output formats, respectively. `stable-diff` uses
the
`--diff` to compare the two diff rendering approaches. See the full
hyperfine
command below for more details. For a sense of scale, the `stable`
output format
produces 1873 lines on stdout, compared to 855,278 for `preview-full`
and
857,798 for `stable-diff`.
| Command | Mean [ms] | Min [ms] | Max [ms] | Relative |
|:------------------|--------------:|---------:|---------:|-------------:|
| `stable` | 201.2 ± 6.8 | 192.9 | 220.6 | 1.00 |
| `preview-full` | 9113.2 ± 31.2 | 9076.1 | 9152.0 | 45.29 ± 1.54 |
| `preview-concise` | 214.2 ± 1.4 | 212.0 | 217.6 | 1.06 ± 0.04 |
| `stable-diff` | 3308.6 ± 20.2 | 3278.6 | 3341.8 | 16.44 ± 0.56 |
In summary, the `preview-concise` diagnostics are ~6% slower than the
stable
output format, increasing the average runtime from 201.2 ms to 214.2 ms.
The
`full` preview diagnostics are much more expensive, taking over 9113.2
ms to
complete, which is ~3x more expensive even than the stable diffs
produced by the
`--diff` flag.
My main takeaways here are:
1. Rendering `Edit`s is much more expensive than rendering the diffs
from `--diff`
2. Constructing `Edit`s actually isn't too bad
### Constructing `Edit`s
I also took a closer look at `Edit` construction by modifying the code
and
repeating the `preview-concise` benchmark and found that the main issue
is
constructing a `SourceFile` for use in the `Edit` rendering. Commenting
out the
`Edit` construction itself has basically no effect:
| Command | Mean [ms] | Min [ms] | Max [ms] | Relative |
|:----------|------------:|---------:|---------:|------------:|
| `stable` | 197.5 ± 1.6 | 195.0 | 200.3 | 1.00 |
| `no-edit` | 208.9 ± 2.2 | 204.8 | 212.2 | 1.06 ± 0.01 |
However, also omitting the source text from the `SourceFile`
construction
resolves the slowdown compared to `stable`. So it seems that copying the
full
source text into a `SourceFile` is the main cause of the slowdown for
non-`full`
diagnostics.
| Command | Mean [ms] | Min [ms] | Max [ms] | Relative |
|:-----------------|------------:|---------:|---------:|------------:|
| `stable` | 202.4 ± 2.9 | 197.6 | 207.9 | 1.00 |
| `no-source-text` | 202.7 ± 3.3 | 196.3 | 209.1 | 1.00 ± 0.02 |
### Rendering diffs
The main difference between `stable-diff` and `preview-full` seems to be
the diffing strategy we use from `similar`. Both versions use the same
algorithm, but in the existing
[`CodeDiff`](https://github.com/astral-sh/ruff/blob/main/crates/ruff_linter/src/source_kind.rs#L259)
rendering for the `--diff` flag, we only do line-level diffing, whereas
for `Diagnostic`s we use `TextDiff::iter_inline_changes` to highlight
word-level changes too. Skipping the word diff for `Diagnostic`s closes
most of the gap:
| Command | Mean [s] | Min [s] | Max [s] | Relative |
|:---|---:|---:|---:|---:|
| `stable-diff` | 3.323 ± 0.015 | 3.297 | 3.341 | 1.00 |
| `preview-full` | 3.654 ± 0.019 | 3.618 | 3.682 | 1.10 ± 0.01 |
(In some repeated runs, I've seen as small as a ~5% difference, down
from 10% in the table)
This doesn't actually change any of our snapshots, but it would
obviously change the rendered result in a terminal since we wouldn't
highlight the specific words that changed within a line.
Another much smaller change that we can try is removing the deadline
from the `iter_inline_changes` call. It looks like there's a fair amount
of overhead from the default 500 ms deadline for computing these, and
using `iter_inline_changes(op, None)` (`None` for the optional deadline
argument) improves the runtime quite a bit:
| Command | Mean [s] | Min [s] | Max [s] | Relative |
|:---|---:|---:|---:|---:|
| `stable-diff` | 3.322 ± 0.013 | 3.298 | 3.341 | 1.00 |
| `preview-full` | 5.296 ± 0.030 | 5.251 | 5.366 | 1.59 ± 0.01 |
<hr>
<details><summary>hyperfine command</summary>
```shell
cargo build --release --bin ruff && hyperfine --ignore-failure --warmup 10 --export-markdown /tmp/table.md \
-n stable -n preview-full -n preview-concise -n stable-diff \
"./target/release/ruff format --check ./crates/ruff_linter/resources/test/cpython/ --no-cache" \
"./target/release/ruff format --check ./crates/ruff_linter/resources/test/cpython/ --no-cache --preview --output-format=full" \
"./target/release/ruff format --check ./crates/ruff_linter/resources/test/cpython/ --no-cache --preview --output-format=concise" \
"./target/release/ruff format --check ./crates/ruff_linter/resources/test/cpython/ --no-cache --diff"
```
</details>
</p>
</details>
## Test Plan
Some new CLI tests and manual testing
## Summary
Not sure if this was the original intention, but it looks to me like the
previous `Type::literal_promotion_type` was more of an implementation
detail for the actual operation of promoting all literals in a
possibly-nested position of a type.
This is not a pure refactor, as I'm technically changing the behavior
for that protocols diagnostic message suggestion.
## Test Plan
New Markdown test
## Summary
Add two simple tests that we recently discussed with @dcreager. They
demonstrate that the `TypeMapping::MarkTypeVarsInferable` operation
really does need to keep track of the binding context.
## Test Plan
Made sure that those tests fail if we create
`TypeMapping::MarkTypeVarsInferable(None)`s everywhere.
This PR ensures that we always put `./src` before `.` in our list of
first-party search paths. This better emulates the fact that at runtime,
the module name of a file `src/foo.py` would almost certainly be `foo`
rather than `src.foo`.
I wondered if fixing this might fix
https://github.com/astral-sh/ruff/pull/20603#issuecomment-3345317444. It
seems like that's not the case, but it also seems like it leads to
better diagnostics because we report much more intuitive module names to
the user in our error messages -- so, it's probably a good change
anyway.
## Summary
Modify the (external) signature of instance methods such that the first
parameter uses `Self` unless it is explicitly annotated. This allows us
to correctly type-check more code, and allows us to infer correct return
types for many functions that return `Self`. For example:
```py
from pathlib import Path
from datetime import datetime, timedelta
reveal_type(Path(".config") / ".ty") # now Path, previously Unknown
def _(dt: datetime, delta: timedelta):
reveal_type(dt - delta) # now datetime, previously Unknown
```
part of https://github.com/astral-sh/ty/issues/159
## Performance
I ran benchmarks locally on `attrs`, `freqtrade` and `colour`, the
projects with the largest regressions on CodSpeed. I see much smaller
effects locally, but can definitely reproduce the regression on `attrs`.
From looking at the profiling results (on Codspeed), it seems that we
simply do more type inference work, which seems plausible, given that we
now understand much more return types (of many stdlib functions). In
particular, whenever a function uses an implicit `self` and returns
`Self` (without mentioning `Self` anywhere else in its signature), we
will now infer the correct type, whereas we would previously return
`Unknown`. This also means that we need to invoke the generics solver in
more cases. Comparing half a million lines of log output on attrs, I can
see that we do 5% more "work" (number of lines in the log), and have a
lot more `apply_specialization` events (7108 vs 4304). On freqtrade, I
see similar numbers for `apply_specialization` (11360 vs 5138 calls).
Given these results, I'm not sure if it's generally worth doing more
performance work, especially since none of the code modifications
themselves seem to be likely candidates for regressions.
| Command | Mean [ms] | Min [ms] | Max [ms] | Relative |
|:---|---:|---:|---:|---:|
| `./ty_main check /home/shark/ecosystem/attrs` | 92.6 ± 3.6 | 85.9 |
102.6 | 1.00 |
| `./ty_self check /home/shark/ecosystem/attrs` | 101.7 ± 3.5 | 96.9 |
113.8 | 1.10 ± 0.06 |
| Command | Mean [ms] | Min [ms] | Max [ms] | Relative |
|:---|---:|---:|---:|---:|
| `./ty_main check /home/shark/ecosystem/freqtrade` | 599.0 ± 20.2 |
568.2 | 627.5 | 1.00 |
| `./ty_self check /home/shark/ecosystem/freqtrade` | 607.9 ± 11.5 |
594.9 | 626.4 | 1.01 ± 0.04 |
| Command | Mean [ms] | Min [ms] | Max [ms] | Relative |
|:---|---:|---:|---:|---:|
| `./ty_main check /home/shark/ecosystem/colour` | 423.9 ± 17.9 | 394.6
| 447.4 | 1.00 |
| `./ty_self check /home/shark/ecosystem/colour` | 426.9 ± 24.9 | 373.8
| 456.6 | 1.01 ± 0.07 |
## Test Plan
New Markdown tests
## Ecosystem report
* apprise: ~300 new diagnostics related to problematic stubs in apprise
😩
* attrs: a new true positive, since [this
function](4e2c89c823/tests/test_make.py (L2135))
is missing a `@staticmethod`?
* Some legitimate true positives
* sympy: lots of new `invalid-operator` false positives in [matrix
multiplication](cf9f4b6805/sympy/matrices/matrixbase.py (L3267-L3269))
due to our limited understanding of [generic `Callable[[Callable[[T1,
T2], T3]], Callable[[T1, T2], T3]]` "identity"
types](cf9f4b6805/sympy/core/decorators.py (L83-L84))
of decorators. This is not related to type-of-self.
## Typing conformance results
The changes are all correct, except for
```diff
+generics_self_usage.py:50:5: error[invalid-assignment] Object of type `def foo(self) -> int` is not assignable to `(typing.Self, /) -> int`
```
which is related to an assignability problem involving type variables on
both sides:
```py
class CallableAttribute:
def foo(self) -> int:
return 0
bar: Callable[[Self], int] = foo # <- we currently error on this assignment
```
---------
Co-authored-by: Shaygan Hooshyari <sh.hooshyari@gmail.com>
## Summary
Addresses
https://github.com/astral-sh/ruff/pull/20443#discussion_r2381237640 by
factoring out the `match` on the ruff output format in a way that should
be reusable by the formatter.
I didn't think this was going to work at first, but the fact that the
config holds options that apply only to certain output formats works in
our favor here. We can set up a single config for all of the output
formats and then use `try_from` to convert the `OutputFormat` to a
`DiagnosticFormat` later.
## Test Plan
Existing tests, plus a few new ones to make sure relocating the
`SHOW_FIX_SUMMARY` rendering worked, that was untested before. I deleted
a bunch of test code along with the `text` module, but I believe all of
it is now well-covered by the `full` and `concise` tests in `ruff_db`.
I also merged this branch into
https://github.com/astral-sh/ruff/pull/20443 locally and made sure that
the API actually helps. `render_diagnostics` dropped in perfectly and
passed the tests there too.
`TypeMapping` is no longer cow-shaped.
Before, `TypeMapping` defined a `to_owned` method, which would make an
owned copy of the type mapping. This let us apply type mappings to
function literals lazily. The primary part of a function that you have
to apply the type mapping to is its signature. The hypothesis was that
doing this lazily would prevent us from constructing the signature of a
function just to apply a type mapping; if you never ended up needed the
updated function signature, that would be extraneous work.
But looking at the CI for this PR, it looks like that hypothesis is
wrong! And this definitely cleans up the code quite a bit. It also means
that over time we can consider replacing all of these `TypeMapping` enum
variants with separate `TypeTransformer` impls.
---------
Co-authored-by: David Peter <mail@david-peter.de>
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## Summary
This PR addresses #20570 . In the example, the correct usage had a
bug/issue where in the except block after logging exception, None was
getting returned, which made the linters flag out the code. So adding an
empty raise solves the issue.
## Test Plan
Tested it by building the doc locally.
## Summary
Fixes a bug observed by @AlexWaygood where `C[Any] <: C[object]` should
hold for a class that is covariant in its type parameter (and similar
subtyping relations involving dynamic types for other variance
configurations).
## Test Plan
New and updated Markdown tests
While working on #20093, I kept running into test failures due to
constraint sets not simplifying as much as they could, and therefore not
being easily testable against "always true" and "always false".
This PR updates our constraint set representation to use BDDs. Because
BDDs are reduced and ordered, they are canonical — equivalent boolean
formulas are represented by the same interned BDD node.
That said, there is a wrinkle, in that the "variables" that we use in
these BDDs — the individual constraints like `Lower ≤ T ≤ Upper` are not
always independent of each other.
As an example, given types `A ≤ B ≤ C ≤ D` and a typevar `T`, the
constraints `A ≤ T ≤ C` and `B ≤ T ≤ D` "overlap" — their intersection
is non-empty. So we should be able to simplify
```
(A ≤ T ≤ C) ∧ (B ≤ T ≤ D) == (B ≤ T ≤ C)
```
That's not a simplification that the BDD structure can perform itself,
since those three constraints are modeled as separate BDD variables, and
are therefore "opaque" to the BDD algorithms.
That means we need to perform this kind of simplification ourselves. We
look at pairs of constraints that appear in a BDD and see if they can be
simplified relative to each other, and if so, replace the pair with the
simplification. A large part of the toil of getting this PR to work was
identifying all of those patterns and getting that substitution logic
correct.
With this new representation, all existing tests pass, as well as some
new ones that represent test failures that were occuring on #20093.
---------
Co-authored-by: Carl Meyer <carl@astral.sh>
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## Summary
Follow up on #20495. The improvement suggested by @AlexWaygood cannot be
applied as-is since the `argument_matches` vector is indexed by argument
number, while the two boolean vectors are indexed by parameter number.
Still coalescing the latter two saves one allocation.
I guess I missed these in #20007, but I found them today while grepping
for something else. `Option::unwrap` has been const since 1.83, so we
can use it here and avoid some unsafe code.
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## Summary
<!-- What's the purpose of the change? What does it do, and why? -->
This PR implements
https://docs.astral.sh/ruff/rules/future-feature-not-defined/ (F407) as
a semantic syntax error.
## Test Plan
<!-- How was it tested? -->
I have written inline tests as directed in #17412
---------
Signed-off-by: 11happy <soni5happy@gmail.com>
Summary
--
Fixes#20536 by linking between the isort options `case-sensitive` and
`order-by-type`. The latter takes precedence over the former, so it
seems good to clarify this somewhere.
I tweaked the wording slightly, but this is otherwise based on the patch
from @SkylerWittman in
https://github.com/astral-sh/ruff/issues/20536#issuecomment-3326097324
(thank you!)
Test Plan
--
N/a
---------
Co-authored-by: Skyler Wittman <skyler.wittman@gmail.com>
Co-authored-by: Micha Reiser <micha@reiser.io>
Summary
--
This fixes a bug pointed out in #20560 where one of the `pylint`
settings wasn't used in its `Display` implementation.
Test Plan
--
Existing tests with updated snapshots
## Summary
Improve the SIM105 rule message to prevent user confusion about how to
properly use `contextlib.suppress`.
The previous message "Replace with `contextlib.suppress(ValueError)`"
was ambiguous and led users to incorrectly use
`contextlib.suppress(ValueError)` as a statement inside except blocks
instead of replacing the entire try-except-pass block with `with
contextlib.suppress(ValueError):`.
This change makes the message more explicit:
- **Before**: `"Use \`contextlib.suppress({exception})\` instead of
\`try\`-\`except\`-\`pass\`"`
- **After**: `"Replace \`try\`-\`except\`-\`pass\` block with \`with
contextlib.suppress({exception})\`"`
The fix title is also updated to be more specific:
- **Before**: `"Replace with \`contextlib.suppress({exception})\`"`
- **After**: `"Replace \`try\`-\`except\`-\`pass\` with \`with
contextlib.suppress({exception})\`"`
Fixes#20462
## Test Plan
- ✅ All existing SIM105 tests pass with updated snapshots
- ✅ Cargo clippy passes without warnings
- ✅ Full test suite passes
- ✅ The new messages clearly indicate that the entire try-except-pass
block should be replaced with a `with` statement, preventing the misuse
described in the issue
---------
Co-authored-by: Giovani Moutinho <e@mgiovani.dev>
## Summary
Closes: https://github.com/astral-sh/ty/issues/551
This PR adds support for step 4 of the overload call evaluation
algorithm which states that:
> If the argument list is compatible with two or more overloads,
determine whether one or more of the overloads has a variadic parameter
(either `*args` or `**kwargs`) that maps to a corresponding argument
that supplies an indeterminate number of positional or keyword
arguments. If so, eliminate overloads that do not have a variadic
parameter.
And, with that, the overload call evaluation algorithm has been
implemented completely end to end as stated in the typing spec.
## Test Plan
Expand the overload call test suite.
## Summary
This removes a hack in the protocol satisfiability check that was
previously needed to work around missing assignability-modeling of
inferable type variables. Assignability of type variables is not
implemented fully, but some recent changes allow us to remove that hack
with limited impact on the ecosystem (and the test suite). The change in
the typing conformance test is favorable.
## Test Plan
* Adapted Markdown tests
* Made sure that this change works in combination with
https://github.com/astral-sh/ruff/pull/20517
## Summary
Closes: https://github.com/astral-sh/ty/issues/1236
This PR fixes a bug where the variadic argument wouldn't match against
the variadic parameter in certain scenarios.
This was happening because I didn't realize that the `all_elements`
iterator wouldn't keep on returning the variable element (which is
correct, I just didn't realize it back then).
I don't think we can use the `resize` method here because we don't know
how many parameters this variadic argument is matching against as this
is where the actual parameter matching occurs.
## Test Plan
Expand test cases to consider a few more combinations of arguments and
parameters which are variadic.
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## Summary
<!-- What's the purpose of the change? What does it do, and why? -->
First contribution so please let me know if I've made a mistake
anywhere. This was aimed to fix#19982, it adds the isolation level to
PYI021 to in the same style as the PIE790 rule.
fixes: #19982
## Test Plan
<!-- How was it tested? -->
I added a case to the PYI021.pyi file where the two rules are present as
there wasn't a case with them both interacting, using the minimal
reproducible example that @ntBre created on the issue (I think I got the
`# ERROR` markings wrong, so please let me know how to fix that if I
did).
---------
Co-authored-by: Brent Westbrook <brentrwestbrook@gmail.com>
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## Summary
This PR implements
https://docs.astral.sh/ruff/rules/multiple-starred-expressions/ as a
semantic syntax error
## Test Plan
I have added inline tests as directed in #17412
---------
Signed-off-by: 11happy <soni5happy@gmail.com>
Co-authored-by: Brent Westbrook <36778786+ntBre@users.noreply.github.com>
## Summary
Fixes https://github.com/astral-sh/ty/issues/1242
From finding references with the LSP, `FileResolver::path` is only
called once, in `UnifiedFile::path`, so I went through those references,
and it looked safe to make this change in every case. Most of the
references are in the various output formats, where we inherited the
absolute vs relative path decision from Ruff. Two other uses are as
fallbacks if converting a relativized path to a string fails. Finally,
we use the path for sorting and in `UnifiedFile::relative_path`.
## Test Plan
Existing tests, with snapshots updated to show absolute paths (in the
`TestDb` this just added a `/` in front of the file names). I also
updated the GitLab CLI test to set the `CI_PROJECT_DIR` environment
variable and ran a test in GitLab CI:
<img width="613" height="114" alt="image"
src="https://github.com/user-attachments/assets/8ab81dba-54fd-4a24-9110-77ef89293cff"
/>
- Adds test cases exercising file selection by extension with
`--preview` enabled and disabled.
- Adds `INCLUDE_PREVIEW` with file patterns including `*.pyw`.
- In global preview mode, default configuration selects patterns from
`INCLUDE_PREVIEW`.
- Manually tested ruff server with local vscode for both formatting and
linting of a `.pyw` file.
Closes https://github.com/astral-sh/ruff/issues/13246
## Summary
This applies the trick that we use for `builtins.open` to similar
functions that have the same problem. The reason is that the problem
would otherwise become even more pronounced once we add understanding of
the implicit type of `self` parameters, because then something like
`(base_path / "test.bin").open("rb")` also leads to a wrong return type
and can result in false positives.
## Test Plan
New Markdown tests
## Summary
I found this bug while working on #20528.
The minimum reproducible code is:
```python
from __future__ import annotations
from typing import NamedTuple
from ty_extensions import is_disjoint_from, static_assert
class Path(NamedTuple):
prev: Path | None
key: str
static_assert(not is_disjoint_from(Path, Path))
```
A stack overflow occurs when a nominal instance type inherits from
`NamedTuple` and is defined recursively.
This PR fixes this bug.
## Test Plan
mdtest updated
## Summary
Adds a new rule to find and report use of `os.path` or `pathlib.Path` in
async functions.
Issue: #8451
## Test Plan
Using `cargo insta test`
### Summary
This PR includes two changes, both of which are necessary to resolve
https://github.com/astral-sh/ty/issues/1196:
* For a generic class `C[T]`, we previously used `C[Unknown]` as the
upper bound of the `Self` type variable. There were two problems with
this. For one, when `Self` appeared in contravariant position, we would
materialize its upper bound to `Bottom[C[Unknown]]` (which might
simplify to `C[Never]` if `C` is covariant in `T`) when accessing
methods on `Top[C[Unknown]]`. This would result in `invalid-argument`
errors on the `self` parameter. Also, using an upper bound of
`C[Unknown]` would mean that inside methods, references to `T` would be
treated as `Unknown`. This could lead to false negatives. To fix this,
we now use `C[T]` (with a "nested" typevar) as the upper bound for
`Self` on `C[T]`.
* In order to make this work, we needed to allow assignability/subtyping
of inferable typevars to other types, since we now check assignability
of e.g. `C[int]` to `C[T]` (when checking assignability to the upper
bound of `Self`) when calling an instance-method on `C[int]` whose
`self` parameter is annotated as `self: Self` (or implicitly `Self`,
following https://github.com/astral-sh/ruff/pull/18007).
closes https://github.com/astral-sh/ty/issues/1196
closes https://github.com/astral-sh/ty/issues/1208
### Test Plan
Regression tests for both issues.
## Summary
@ibraheemdev notes this example failed
```py
from typing import Callable
class X:
...
def f(callable: Callable[[], X]) -> X:
return callable()
x = f(X)
```
Resolves https://github.com/astral-sh/ty/issues/1210
The issue was that we set the `Self` to the class type instead of the
instance type of the class.
## Test Plan
Fix tests in `is_subtype_of.md`
## Summary
Fixes https://github.com/astral-sh/ty/issues/1218.
This bug doesn't currently cause us any real-world issues, because we
don't yet understand the signatures typeshed gives us for `isinstance()`
and `issubclass()` (typeshed's annotations there use PEP-613 type
aliases). #20107 demonstrates that this will start causing us issues as
soon as we add support for PEP-613 aliases, however, so it makes sense
to fix it now.
## Test Plan
Added mdtests
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## Summary
Fixes#12734
I have started with simply checking if any arguments that are providing
extra values to the log message are calls to `str` or `repr`, as
suggested in the linked issue. There was a concern that this could cause
false positives and the check should be more explicit. I am happy to
look into that if I have some further examples to work with.
If this is the accepted solution then there are more cases to add to the
test and it should possibly also do test for the same behavior via the
`extra` keyword.
<!-- What's the purpose of the change? What does it do, and why? -->
## Test Plan
I have added a new test case and python file to flake8_logging_format
with examples of this anti-pattern.
<!-- How was it tested? -->
## Summary
Fixes#20440
Fix B004 to skip invalid hasattr/getattr calls
- Add argument validation for `hasattr` and `getattr`
- Skip B004 rule when function calls have invalid argument patterns
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## Summary
<!-- What's the purpose of the change? What does it do, and why? -->
Fixes#20035, fixes#19395
This is for deduplicating input paths to avoid processing the same file
multiple times.
This is my first contribution, so I'm sorry if I miss something. Please
tell me if this is needed for this feature.
## Test Plan
<!-- How was it tested? -->
I just added a test `find_python_files_deduplicated` in
eee1020e32/crates/ruff_workspace/src/resolver.rs (L1017)
. This pull request adds changes to `WalkPythonFilesState::finish`,
which is used in `python_files_in_path`, so they affect some commands
such as `analyze`, `format`, `check` and so on. I will add snapshot
tests for them if necessary.
I’ve already confirmed that the same thing happens with ruff check as
well.
```
$ echo "x = 1" > example/foo.py
$ uvx ruff check example example/foo.py
I002 [*] Missing required import: `from __future__ import annotations`
--> /path/to/example/foo.py:1:1
help: Insert required import: `from __future__ import annotations`
I002 [*] Missing required import: `from __future__ import annotations`
--> /path/to/example/foo.py:1:1
help: Insert required import: `from __future__ import annotations`
Found 2 errors.
[*] 2 fixable with the `--fix` option.
```
## Summary
Implements new rule `B912` that requires the `strict=` argument for
`map(...)` calls with two or more iterables on Python 3.14+, following
the same pattern as `B905` for `zip()`.
Closes#20057
---------
Co-authored-by: dylwil3 <dylwil3@gmail.com>
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Now that imports are actually inserted, this should give us some
valuable dog-fooding experience.
Note that we don't currently do any ranking on completions, so until
that is improved, even in-scope completions could suffer. With that
said, this shouldn't have any impact at all in several scenarios (like
completions for attributes on objects).
We don't attempt to fix these yet. I think there are bigger fish to fry.
I came up with these based on this discussion:
https://github.com/astral-sh/ruff/pull/20439#discussion_r2357769518
Here's one example:
```
if ...:
from foo import MAGIC
else:
from bar import MAGIC
MAG<CURSOR>
```
Now in this example, completions will include `MAGIC` from the local
scope. That is, auto-import is involved with that completion. But at
present, auto-import will suggest importing `foo` and `bar` because we
haven't de-duplicated completions yet. Which is fine.
Here's another example:
```
if ...:
import foo as fubar
else:
import bar as fubar
MAG<CURSOR>
```
Now here, there is no `MAGIC` symbol in scope. So auto-import is in
play. Let's assume that the user selects `MAGIC` from `foo` in this
example. (`bar` also has `MAGIC`.)
Since we currently ignore the declaration site for symbols with
multiple possible bindings, the importer today doesn't know that
`fubar` _could_ contain `MAGIC`. But even if it did, what would we do
with that information? Should we do this?
```
if ...:
import foo as fubar
from foo import MAGIC
else:
import bar as fubar
MAGIC
```
Or could we reason that `bar` also has `MAGIC`?
```
if ...:
import foo as fubar
else:
import bar as fubar
fubar.MAGIC
```
But if we did that, we're making an assumption of user intent, since
they *selected* `foo.MAGIC` but not `bar.MAGIC`.
Anyway, I don't think we need to settle on an answer today, but I
wanted to capture some of these tricky cases in tests at the very
least.
## Summary
This PR adds support for unpacking `**kwargs` argument.
This can be matched against any standard (positional or keyword),
keyword-only, or keyword variadic parameter that haven't been matched
yet.
This PR also takes care of special casing `TypedDict` because the key
names and the corresponding value type is known, so we can be more
precise in our matching and type checking step. In the future, this
special casing would be extended to include `ParamSpec` as well.
Part of astral-sh/ty#247
## Test Plan
Add test cases for various scenarios.
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## Summary
Resolves#20033
## Test Plan
unit tests added to the new split function, existing snapshot test
updated.
Co-authored-by: Brent Westbrook <brentrwestbrook@gmail.com>
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## Summary
<!-- What's the purpose of the change? What does it do, and why? -->
Fixes#19887
- flynt(FLY002): When joining only string constants, upgrade raw
single-quoted strings to raw triple-quoted if the resulting
content contains a newline.
- Choose a safe triple-quote delimiter by switching to the opposite
quote style if the preferred triple appears inside the
content.
- Update FLY002 snapshot to include the `\n'.join([r'line1','line2'])`
case.
## Test Plan
I've added one test case to FLY002.py.
<!-- How was it tested? -->
---------
Co-authored-by: Brent Westbrook <36778786+ntBre@users.noreply.github.com>
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## Summary
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Fixes#20255
Mark single-item-membership-test fixes as always unsafe
- Always set `Applicability::Unsafe` for FURB171 fixes
- Update “Fix safety” docs to reflect always-unsafe behavior
- Expand tests (not in, nested set/frozenset, commented args)
## Test Plan
<!-- How was it tested? -->
I have added new test cases to
`crates/ruff_linter/resources/test/fixtures/refurb/FURB171_0.py` and
`crates/ruff_linter/resources/test/fixtures/refurb/FURB171_1.py`.
---------
Co-authored-by: Brent Westbrook <36778786+ntBre@users.noreply.github.com>
## Summary
Fixes https://github.com/astral-sh/ruff/issues/20134
## Test Plan
`cargo nextest run flake8_use_pathlib`
---------
Co-authored-by: Dan Parizher <danparizher@users.noreply.github.com>
Co-authored-by: Brent Westbrook <brentrwestbrook@gmail.com>
This seems to be more consistent with how other LSPs work (like
`rust-analyzer`), and also I think is more consistent with how
`CompletionItem.detail` is itself rendered. Namely, in VS Code, it
is right-aligned. And it's also where we put the type signature.
But `CompletionItemLabelDetails.detail` is left-aligned where as
`CompletionItemLabelDetails.description` is right-aligned. So let's
swap them such that type signatures go in the latter and not the
former.
This also adds a space before the module name and contextualizes
it with `(import <name>)` to help aide the end user in figuring out
selecting the completion will do.
Fixes#1200
## Summary
This change reduces MD test compilation time from 6s to 3s on my laptop.
We don't need to build the unit tests and the corpus tests when we're
only interested in Markdown-based tests.
## Test Plan
local benchmarks
## Summary
Part of https://github.com/astral-sh/ty/issues/168. Infer more precise types for collection literals (currently, only `list` and `set`). For example,
```py
x = [1, 2, 3] # revealed: list[Unknown | int]
y: list[int] = [1, 2, 3] # revealed: list[int]
```
This could easily be extended to `dict` literals, but I am intentionally limiting scope for now.
## Summary
Part of https://github.com/astral-sh/ruff/issues/2331
## Test Plan
`cargo nextest run flake8_use_pathlib`
---------
Co-authored-by: Brent Westbrook <36778786+ntBre@users.noreply.github.com>
Fixes: https://github.com/astral-sh/ty/issues/1173
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## Summary
This PR will change the logic of binding Self type variables to bind
self to the immediate function that it's used on.
Since we are binding `self` to methods and not the class itself we need
to ensure that we bind self consistently.
The fix is to traverse scopes containing the self and find the first
function inside a class and use that function to bind the typevar for
self.
If no such scope is found we fallback to the normal behavior. Using Self
outside of a class scope is not legal anyway.
## Test Plan
Added a new mdtest.
Checked the diagnostics that are not emitted anymore in [primer
results](https://github.com/astral-sh/ruff/pull/20366#issuecomment-3289411424).
It looks good altough I don't completely understand what was wrong
before.
---------
Co-authored-by: Douglas Creager <dcreager@dcreager.net>
This is somewhat inspired by a similar abstraction in
`ruff_linter`. The main idea is to create an importer once
for a module that you want to add imports to. And then call
`import` to generate an edit for each symbol you want to
add.
I haven't done any performance profiling here yet. I don't
know if it will be a bottleneck. In particular, I do expect
`Importer::import` (but not `Importer::new`) to get called
many times for a single completion request when auto-import
is enabled. Particularly in projects with a lot of unimported
symbols. Because I don't know the perf impact, I didn't do
any premature optimization here. But there are surely some
low hanging fruit if this does prove to be a problem.
New tests make up a big portion of the diff here. I tried to
think of a bunch of different cases, although I'm sure there
are more.
This rejiggers some stuff in the main completions entrypoint
in `ty_ide`. A more refined `Completion` type is defined
with more information. In particular, to support auto-import,
we now include a module name and an "edit" for inserting an
import.
This also rolls the old "detailed completion" into the new
completion type. Previously, we were relying on the completion
type for `ty_python_semantic`. But `ty_ide` is really the code
that owns completions.
Note that this code doesn't build as-is. The next commit will
add the importer used here in `add_unimported_completions`.
Based on how this API is currently implemented, this doesn't
really cost us anything. But it gives us access to more
information about where the symbol is defined.
I think this is a better home for it. This way, `ty_ide`
more clearly owns how the "kind" of a completion is computed.
In particular, it is computed differently for things where
we know its type versus unimported symbols.
In the course of writing the "add an import" implementation,
I realized that we needed to know which symbols were in scope
and how they were defined. This was necessary to be able to
determine how to add a new import in a way that (minimally)
does not conflict with existing symbols.
I'm not sure that this is fully correct (especially for
symbol bindings) and it's unclear to me in which cases a
definition site will be missing. But this seems to work for
some of the basic cases that I tried.
The names of the submodules returned should be *complete*. This
is the contract of `Module::name`. However, we were previously
only returning the basename of the submodule.
This can already be accomplished via a `From` impl (and indeed,
that's how this is implemented). But in a generic context, the
turbo-fishing that needs to be applied is quite annoying.
Basically, given a `from module import name1, name2, ...` statement,
we'd like to be able to insert another name in that list.
This new `Insertion::existing_import` API provides such
functionality. There isn't much to it, although we are careful
to try and avoid inserting nonsense for import statements
that are already invalid.
This refactors the importer abstraction to use a shared
`Insertion`. This is mostly just moving some code around
with some slight tweaks.
The plan here is to keep the rest of the importing code
in `ruff_linter` and then write something ty-specific on
top of `Insertion`. This ends up sharing some code, but
not as much as would be ideal. In particular, the
`ruff_linter` imported is pretty tightly coupled with
ruff's semantic model. So to share the code, we'd need to
abstract over that.
## Summary
This PR wires up the GitHub output format moved to `ruff_db` in #20320
to the ty CLI.
It's a bit smaller than the GitLab version (#20155) because some of the
helpers were already in place, but I did factor out a few
`DisplayDiagnosticConfig` constructor calls in Ruff. I also exposed the
`GithubRenderer` and a wrapper `DisplayGithubDiagnostics` type because
we needed a way to configure the program name displayed in the GitHub
diagnostics. This was previously hard-coded to `Ruff`:
<img width="675" height="247" alt="image"
src="https://github.com/user-attachments/assets/592da860-d2f5-4abd-bc5a-66071d742509"
/>
Another option would be to drop the program name in the output format,
but I think it can be helpful in workflows with multiple programs
emitting annotations (such as Ruff and ty!)
## Test Plan
New CLI test, and a manual test with `--config 'terminal.output-format =
"github"'`
## Summary
Catch infinite recursion in binary-compare inference.
Fixes the stack overflow in `graphql-core` in mypy-primer.
## Test Plan
Added two tests that stack-overflowed before this PR.
## Summary
Use `Type::Divergent` to short-circuit diverging types in type
expressions. This avoids panicking in a wide variety of cases of
recursive type expressions.
Avoids many panics (but not yet all -- I'll be tracking down the rest)
from https://github.com/astral-sh/ty/issues/256 by falling back to
Divergent. For many of these recursive type aliases, we'd like to
support them properly (i.e. really understand the recursive nature of
the type, not just fall back to Divergent) but that will be future work.
This switches `Type::has_divergent_type` from using `any_over_type` to a
custom set of visit methods, because `any_over_type` visits more than we
need to visit, and exercises some lazy attributes of type, causing
significantly more work. This change means this diff doesn't regress
perf; it even reclaims some of the perf regression from
https://github.com/astral-sh/ruff/pull/20333.
## Test Plan
Added mdtest for recursive type alias that panics on main.
Verified that we can now type-check `packaging` (and projects depending
on it) without panic; this will allow moving a number of mypy-primer
projects from `bad.txt` to `good.txt` in a subsequent PR.
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## Summary
This PR implements F406
https://docs.astral.sh/ruff/rules/undefined-local-with-nested-import-star-usage/
as a semantic syntax error
## Test Plan
I have written inline tests as directed in #17412
---------
Signed-off-by: 11happy <soni5happy@gmail.com>
- Convert panics to diagnostics with id `Panic`, severity `Fatal`, and
the error as the diagnostic message, annotated with a `Span` with empty
code block and no range.
- Updates the post-linting message diagnostic handling to track the
maximum severity seen, and then prints the "report a bug in ruff"
message only if the max severity was `Fatal`
This depends on the sorting changes since it creates diagnostics with no
range specified.
Previously, we used a very fine-grained representation for individual
constraints: each constraint was _either_ a range constraint, a
not-equivalent constraint, or an incomparable constraint. These three
pieces are enough to represent all of the "real" constraints we need to
create — range constraints and their negation.
However, it meant that we weren't picking up as many chances to simplify
constraint sets as we could. Our simplification logic depends on being
able to look at _pairs_ of constraints or clauses to see if they
simplify relative to each other. With our fine-grained representation,
we could easily encounter situations that we should have been able to
simplify, but that would require looking at three or more individual
constraints.
For instance, negating a range constraint would produce:
```
¬(Base ≤ T ≤ Super) = ((T ≤ Base) ∧ (T ≠ Base)) ∨ (T ≁ Base) ∨
((Super ≤ T) ∧ (T ≠ Super)) ∨ (T ≁ Super)
```
That is, `T` must be (strictly) less than `Base`, (strictly) greater
than `Super`, or incomparable to either.
If we tried to union those back together, we should get `always`, since
`x ∨ ¬x` should always be true, no matter what `x` is. But instead we
would get:
```
(Base ≤ T ≤ Super) ∨ ((T ≤ Base) ∧ (T ≠ Base)) ∨ (T ≁ Base) ∨ ((Super ≤ T) ∧ (T ≠
Super)) ∨ (T ≁ Super)
```
Nothing would simplify relative to each other, because we'd have to look
at all five union elements to see that together they do in fact combine
to `always`.
The fine-grained representation was nice, because it made it easier to
[work out the math](https://dcreager.net/theory/constraints/) for
intersections and unions of each kind of constraint. But being able to
simplify is more important, since the example above comes up immediately
in #20093 when trying to handle constrained typevars.
The fix in this PR is to go back to a more coarse-grained
representation, where each individual constraint consists of a positive
range (which might be `always` / `Never ≤ T ≤ object`), and zero or more
negative ranges. The intuition is to think of a constraint as a region
of the type space (representable as a range) with zero or more "holes"
removed from it.
With this representation, negating a range constraint produces:
```
¬(Base ≤ T ≤ Super) = (always ∧ ¬(Base ≤ T ≤ Super))
```
(That looks trivial, because it is! We just move the positive range to
the negative side.)
The math is not that much harder than before, because there are only
three combinations to consider (each for intersection and union) —
though the fact that there can be multiple holes in a constraint does
require some nested loops. But the mdtest suite gives me confidence that
this is not introducing any new issues, and it definitely removes a
troublesome TODO.
(As an aside, this change also means that we are back to having each
clause contain no more than one individual constraint for any typevar.
This turned out to be important, because part of our simplification
logic was also depending on that!)
---------
Co-authored-by: Carl Meyer <carl@astral.sh>
## Summary
This mainly removes an internal inconsistency, where we didn't remove
the `Self` type variable when eagerly binding `Self` to an instance
type. It has no observable effect, apparently.
builds on top of https://github.com/astral-sh/ruff/pull/20328
## Test Plan
None
## Summary
Fixes https://github.com/astral-sh/ty/issues/1161
Include `NamedTupleFallback` members in `NamedTuple` instance
completions.
- Augment instance attribute completions when completing on NamedTuple
instances by merging members from
`_typeshed._type_checker_internals.NamedTupleFallback`
## Test Plan
Adds a minimal completion test `namedtuple_fallback_instance_methods`
---------
Co-authored-by: David Peter <mail@david-peter.de>
## Summary
This project was [recently removed from
mypy_primer](https://github.com/astral-sh/ruff/pull/20378), so we need
to remove it from `good.txt` in order for ecosystem-analyzer to work
correctly.
## Test Plan
Run mypy_primer and ecosystem-analyzer on this branch.
## Summary
https://github.com/astral-sh/ruff/pull/20165 added a lot of false
positives around calls to `builtins.open()`, because our missing support
for PEP-613 type aliases means that we don't understand typeshed's
overloads for `builtins.open()` at all yet, and therefore always select
the first overload. This didn't use to matter very much, but now that we
have a much stricter implementation of protocol assignability/subtyping
it matters a lot, because most of the stdlib functions dealing with I/O
(`pickle`, `marshal`, `io`, `json`, etc.) are annotated in typeshed as
taking in protocols of some kind.
In lieu of full PEP-613 support, which is blocked on various things and
might not land in time for our next alpha release, this PR adds some
temporary special-casing for `builtins.open()` to avoid the false
positives. We just infer `Todo` for anything that isn't meant to match
typeshed's first `open()` overload. This should be easy to rip out again
once we have proper support for PEP-613 type aliases, which hopefully
should be pretty soon!
## Test Plan
Added an mdtest
## Summary
Fixes https://github.com/astral-sh/ty/issues/377.
We were treating any function as being assignable to any callback
protocol, because we were trying to figure out a type's `Callable`
supertype by looking up the `__call__` attribute on the type's
meta-type. But a function-literal's meta-type is `types.FunctionType`,
and `types.FunctionType.__call__` is `(...) -> Any`, which is not very
helpful!
While working on this PR, I also realised that assignability between
class-literals and callback protocols was somewhat broken too, so I
fixed that at the same time.
## Test Plan
Added mdtests
## Summary
Resolves#20266
Definition of the frozen dataclass attribute can be instantiation of a
nested frozen dataclass as well as a non-nested one.
### Problem explanation
The `function_call_in_dataclass_default` function is invoked during the
"defined scope" stage, after all scopes have been processed. At this
point, the semantic references the top-level scope. When
`SemanticModel::lookup_attribute` executes, it searches for bindings in
the top-level module scope rather than the class scope, resulting in an
error.
To solve this issue, the lookup should be evaluated through the class
scope.
## Test Plan
- Added test case from issue
Co-authored-by: Igor Drokin <drokinii1017@gmail.com>
## Summary
Fixes#19842
Prevent infinite loop with I002 and UP026
- Implement isort-aware handling for UP026 (deprecated mock import):
- Add CLI integration tests in crates/ruff/tests/lint.rs:
## Test Plan
I have added two integration tests
`pyupgrade_up026_respects_isort_required_import_fix` and
`pyupgrade_up026_respects_isort_required_import_from_fix` in
`crates/ruff/tests/lint.rs`.
## Summary
This looks like it should fix the errors that we've been seeing in sympy
in recent mypy-primer runs.
## Test Plan
I wasn't able to reproduce the sympy failures locally; it looks like
there is probably a dependency on the order in which files are checked.
So I don't have a minimal reproducible example, and wasn't able to add a
test :/ Obviously I would be happier if we could commit a regression
test here, but since the change is straightforward and clearly
desirable, I'm not sure how many hours it's worth trying to track it
down.
Mypy-primer is still failing in CI on this PR, because it fails on the
"old" ty commit already (i.e. on main). But it passes [on a no-op PR
stacked on top of this](https://github.com/astral-sh/ruff/pull/20370),
which strongly suggests this PR fixes the problem.
## Summary
Resolves#20282
Makes the rule fix always unsafe, because the replacement may not be
semantically equivalent to the original expression, potentially changing
the behavior of the code.
Updated docstring with examples.
## Test Plan
- Added two tests from issue and regenerated the snapshot
---------
Co-authored-by: Igor Drokin <drokinii1017@gmail.com>
Co-authored-by: Brent Westbrook <36778786+ntBre@users.noreply.github.com>
## Summary
Fixes#20204
Recognize t-strings, generators, and lambdas in RUF016
- Accept boolean literals as valid index and slice bounds.
- Add TString, Generator, and Lambda to `CheckableExprType`.
- Expand RUF016.py fixture and update snapshots accordingly.
Our token-based rules and `noqa` extraction used an `Indexer` that kept
track of f-string ranges but not t-strings. We've updated the `Indexer`
and downstream uses thereof to handle both f-strings and t-strings.
Most of the diff is renaming and adding tests.
Note that much of the "new" logic gets to be naive because the lexer has
already ensured that f and t-string "starts" are paired with their
respective "ends", even amidst nesting and so on.
Finally: one could imagine wanting to know if a given interpolated
string range corresponds to an f-string or a t-string, but I didn't find
a place where we actually needed this.
Closes#20310
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## Summary
<!-- What's the purpose of the change? What does it do, and why? -->
This PR adds support for building loongarch64 binaries in CI. As such
support has been merged in uv (astral-sh/uv#15387) it's time to consider
adding it to ruff.
Please note that as Ubuntu is not yet available for loongarch64, I have
elected to use a Debian Trixie container maintained by community
members. In addition, as Debian's pip does not allow installing modules
system-wide, I have modified the workflow to install additional modules
in a virtual environment.
Since the workflow is shared between all targets, the only way to handle
this difference (between Debian and Ubuntu) is just to install pip in a
venv for all targets. If there is a better (and less intrusive) way to
work around this, please let me know.
## Test Plan
Tests are included in CI and the loongarch64 artifacts built in [this
workflow](https://github.com/SkyBird233/ruff/actions/runs/17640270032/job/50125471548)
has been smoke tested.
## Summary
This PR addresses an issue for a variadic argument when involved in
argument type expansion of overload call evaluation.
The issue is that the expansion of the variadic argument could result in
argument list of different arity. For example, in `*args: tuple[int] |
tuple[int, str]`, the expansion would lead to the variadic argument
being unpacked into 1 and 2 element respectively. This means that the
parameter matching that was performed initially isn't sufficient and
each expanded argument list would need to redo the parameter matching
again.
This is currently done by redoing the parameter matching directly,
maintaining the state of argument forms (and the conflicting forms), and
updating the `Bindings` values if it changes.
Closes: astral-sh/ty#735
## Test Plan
Update existing mdtest.
This PR removes the `Constraints` trait. We removed the `bool`
implementation several weeks back, and are using `ConstraintSet`
everywhere. There have been discussions about trying to include the
reason for an assignability failure as part of the result, but that
there are no concrete plans to do so soon, and it's not clear that we'll
need the `Constraints` trait to do that. (We can ideally just update the
`ConstraintSet` type directly.)
In the meantime, this just complicates the code for no good reason.
This PR is a pure refactoring, and contains no behavioral changes.
---------
Co-authored-by: Alex Waygood <Alex.Waygood@Gmail.com>
## Summary
This is the GitHub analog to #20117. This PR prepares to add a GitHub
output format to ty by moving the implementation from `ruff_linter` to
`ruff_db`. Hopefully this one is a bit easier to review
commit-by-commit. Almost all of the refactoring this time is in the
first commit, then the second commit adds the new `OutputFormat` variant
and moves the file into `ruff_db`. The third commit is just a small
touch up to use a private method that accommodates ty files so that we
can run the tests and update/move the snapshots.
I had to push a fourth commit to fix and test diagnostics without a
span/file.
## Test Plan
Existing tests
Previously, `Type::object` would find the definition of the `object`
class in typeshed, load that in (to produce a `ClassLiteral` and
`ClassType`), and then create a `NominalInstance` of that class.
It's possible that we are using a typeshed that doesn't define `object`.
We will not be able to do much useful work with that kind of typeshed,
but it's still a possibility that we have to support at least without
panicking. Previously, we would handle this situation by falling back on
`Unknown`.
In most cases, that's a perfectly fine fallback! But `object` is also
our top type — the type of all values. `Unknown` is _not_ an acceptable
stand-in for the top type.
This PR adds a new `NominalInstance` variant for "instances of
`object`". Unlike other nominal instances, we do not need to load in
`object`'s `ClassType` to instantiate this variant. We will use this new
variant even when the current typeshed does not define an `object`
class, ensuring that we have a fully static representation of our top
type at all times.
There are several operations that need access to a nominal instance's
class, and for this new `object` variant we load it lazily only when
it's needed. That means this operation is now fallible, since this is
where the "typeshed doesn't define `object`" failure shows up.
This new approach also has the benefit of avoiding some salsa cycles
that were cropping up while I was debugging #20093, since the new
constraint set representation was trying to instantiate `Type::object`
while in the middle of processing its definition in typeshed. Cycle
handling was kicking in correctly and returning the `Unknown` fallback
mentioned above. But the constraint set implementation depends on
`Type::object` being a distinct and fully static type, highlighting that
this is a correctness fix, not just an optimization fix.
---------
Co-authored-by: Alex Waygood <Alex.Waygood@Gmail.com>
## Summary
Use `Type::Divergent` to avoid "too many iterations" panic on an
infinitely-nested tuple in an implicit instance attribute.
The regression here is from checking all tuple elements to see if they
contain a Divergent type. It's 5% on one project, 1% on another, and
zero on the rest. I spent some time looking into eliminating this
regression by tracking a flag on inference results to note if they could
possibly contain any Divergent type, but this doesn't really work --
there are too many different ways a type containing a Divergent type
could enter an inference result. Still thinking about whether there are
other ways to reduce this. One option is if we see certain kinds of
non-atomic types that are commonly expensive to check for Divergent, we
could make `has_divergent_type` a Salsa query on those types.
## Test Plan
Added mdtest.
Co-authored-by: Alex Waygood <Alex.Waygood@Gmail.com>
The debug representation isn't as useful as calling `.display(db)`, but
it's still kind-of annoying when `dbg!()` calls don't compile locally
due to the compiler not being able to guarantee that an object of type
`impl Constraints` implements `Debug`
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## Summary
<!-- What's the purpose of the change? What does it do, and why? -->
Fixes#20235
• Fix `RUF102` to properly handle rule redirects when validating noqa
codes
• Update `code_is_valid` to check redirect targets before determining
validity
• Add test case for rule redirects (TCH002 in this case)
## Test Plan
<!-- How was it tested? -->
I have added a test case for rule redirects to
`crates/ruff_linter/resources/test/fixtures/ruff/RUF102.py`.
## Summary
`CallableTypeOf[bound_method]` would previously bind `self` to the
bound method type itself, instead of binding it to the instance type
stored inside the bound method type.
## Test Plan
Added regression test
This PR adds a new `ty_extensions.ConstraintSet` class, which is used to
expose constraint sets to our mdtest framework. This lets us write a
large collection of unit tests that exercise the invariants and rewrite
rules of our constraint set implementation.
As part of this, `is_assignable_to` and friends are updated to return a
`ConstraintSet` instead of a `bool`, and we implement
`ConstraintSet.__bool__` to return when a constraint set is always
satisfied. That lets us still use
`static_assert(is_assignable_to(...))`, since the assertion will coerce
the constraint set to a bool, and also lets us
`reveal_type(is_assignable_to(...))` to see more detail about
whether/when the two types are assignable. That lets us get rid of
`reveal_when_assignable_to` and friends, since they are now redundant
with the expanded capabilities of `is_assignable_to`.
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