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attempting a fix

This commit is contained in:
Brent Westbrook 2025-11-11 16:33:59 -05:00
parent 376571eed1
commit 79d526cd91
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3 changed files with 620 additions and 21 deletions
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38
crates/ruff_python_formatter/src/expression/expr_lambda.rs
View File

@ -4,6 +4,7 @@ use ruff_python_ast::ExprLambda;
use ruff_text_size::Ranged;
use crate::comments::dangling_comments;
use crate::comments::leading_comments;
use crate::expression::parentheses::{NeedsParentheses, OptionalParentheses};
use crate::other::parameters::ParametersParentheses;
use crate::prelude::*;
@ -33,24 +34,45 @@ impl FormatNodeRule<ExprLambda> for FormatExprLambda {
if dangling_before_parameters.is_empty() {
write!(f, [space()])?;
} else {
write!(f, [dangling_comments(dangling_before_parameters)])?;
}
write!(
group(&format_with(|f: &mut PyFormatter| {
if f.context().node_level().is_parenthesized()
&& (parameters.len() > 1 || !dangling_before_parameters.is_empty())
{
let end_of_line_start = dangling_before_parameters
.partition_point(|comment| comment.line_position().is_end_of_line());
let (same_line_comments, own_line_comments) =
dangling_before_parameters.split_at(end_of_line_start);
dangling_comments(same_line_comments).fmt(f)?;
write![
f,
[parameters
[
soft_line_break(),
leading_comments(own_line_comments),
parameters
.format()
.with_options(ParametersParentheses::Never)]
)?;
.with_options(ParametersParentheses::Never),
]
]
} else {
parameters
.format()
.with_options(ParametersParentheses::Never)
.fmt(f)
}?;
write!(f, [token(":")])?;
if dangling_after_parameters.is_empty() {
write!(f, [space()])?;
write!(f, [space()])
} else {
write!(f, [dangling_comments(dangling_after_parameters)])?;
write!(f, [dangling_comments(dangling_after_parameters)])
}
}))
.fmt(f)?;
} else {
write!(f, [token(":")])?;

2
crates/ruff_python_formatter/src/other/parameters.rs
View File

@ -241,7 +241,7 @@ impl FormatNodeRule<Parameters> for FormatParameters {
let num_parameters = item.len();
if self.parentheses == ParametersParentheses::Never {
write!(f, [group(&format_inner), dangling_comments(dangling)])
write!(f, [format_inner, dangling_comments(dangling)])
} else if num_parameters == 0 {
let mut f = WithNodeLevel::new(NodeLevel::ParenthesizedExpression, f);
// No parameters, format any dangling comments between `()`

589
crates/ruff_python_formatter/tests/snapshots/format@expression__lambda.py.snap
View File

@ -1,7 +1,6 @@
---
source: crates/ruff_python_formatter/tests/fixtures.rs
input_file: crates/ruff_python_formatter/resources/test/fixtures/ruff/expression/lambda.py
snapshot_kind: text
---
## Input
```python
@ -132,6 +131,13 @@ lambda a, /, c: a
*x: x
)
(
lambda
# comment
*x,
**y: x
)
(
lambda
# comment 1
@ -142,6 +148,17 @@ lambda a, /, c: a
x
)
(
lambda
# comment 1
*
# comment 2
x,
**y:
# comment 3
x
)
(
lambda # comment 1
* # comment 2
@ -149,6 +166,14 @@ lambda a, /, c: a
x
)
(
lambda # comment 1
* # comment 2
x,
y: # comment 3
x
)
lambda *x\
:x
@ -203,6 +228,17 @@ lambda: ( # comment
x
)
(
lambda # 1
# 2
x, # 3
# 4
y
: # 5
# 6
x
)
(
lambda
x,
@ -211,6 +247,71 @@ lambda: ( # comment
z
)
# Leading
lambda x: (
lambda y: lambda z: x
+ y
+ y
+ y
+ y
+ y
+ y
+ y
+ y
+ y
+ y
+ y
+ y
+ y
+ y
+ y
+ y
+ y
+ y
+ y
+ y
+ y
+ z # Trailing
) # Trailing
# Leading
lambda x: lambda y: lambda z: [
x,
y,
y,
y,
y,
y,
y,
y,
y,
y,
y,
y,
y,
y,
y,
y,
y,
y,
y,
y,
y,
y,
y,
y,
y,
y,
y,
y,
y,
y,
z
] # Trailing
# Trailing
lambda self, araa, kkkwargs=aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa(*args, **kwargs), e=1, f=2, g=2: d
# Regression tests for https://github.com/astral-sh/ruff/issues/8179
@ -237,7 +338,22 @@ def a():
```
## Output
## Outputs
### Output 1
```
indent-style = space
line-width = 88
indent-width = 4
quote-style = Double
line-ending = LineFeed
magic-trailing-comma = Respect
docstring-code = Disabled
docstring-code-line-width = "dynamic"
preview = Disabled
target_version = 3.10
source_type = Python
```
```python
# Leading
lambda x: x # Trailing
@ -301,7 +417,8 @@ a = (
)
a = (
lambda x, # Dangling
lambda
x, # Dangling
y: 1
)
@ -367,6 +484,13 @@ lambda a, /, c: a
*x: x
)
(
lambda
# comment
*x,
**y: x
)
(
lambda
# comment 1
@ -376,6 +500,16 @@ lambda a, /, c: a
x
)
(
lambda
# comment 1
# comment 2
*x,
**y:
# comment 3
x
)
(
lambda # comment 1
# comment 2
@ -383,6 +517,14 @@ lambda a, /, c: a
x
)
(
lambda # comment 1
# comment 2
*x,
y: # comment 3
x
)
lambda *x: x
(
@ -435,11 +577,87 @@ lambda: ( # comment
)
(
lambda x,
lambda # 1
# 2
x, # 3
# 4
y: # 5
# 6
x
)
(
lambda
x,
# comment
y: z
)
# Leading
lambda x: (
lambda y: lambda z: x
+ y
+ y
+ y
+ y
+ y
+ y
+ y
+ y
+ y
+ y
+ y
+ y
+ y
+ y
+ y
+ y
+ y
+ y
+ y
+ y
+ y
+ z # Trailing
) # Trailing
# Leading
lambda x: lambda y: lambda z: [
x,
y,
y,
y,
y,
y,
y,
y,
y,
y,
y,
y,
y,
y,
y,
y,
y,
y,
y,
y,
y,
y,
y,
y,
y,
y,
y,
y,
y,
y,
z,
] # Trailing
# Trailing
lambda self, araa, kkkwargs=aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa(
*args, **kwargs
), e=1, f=2, g=2: d
@ -451,7 +669,8 @@ def a():
c,
d,
e,
f=lambda self,
f=lambda
self,
*args,
**kwargs: aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa(*args, **kwargs),
)
@ -462,7 +681,365 @@ def a():
c,
d,
e,
f=lambda self,
f=lambda
self,
araa,
kkkwargs,
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa,
args,
kwargs,
e=1,
f=2,
g=2: d,
g=10,
)
```
### Output 2
```
indent-style = space
line-width = 88
indent-width = 4
quote-style = Double
line-ending = LineFeed
magic-trailing-comma = Respect
docstring-code = Disabled
docstring-code-line-width = "dynamic"
preview = Enabled
target_version = 3.10
source_type = Python
```
```python
# Leading
lambda x: x # Trailing
# Trailing
# Leading
lambda x, y: x # Trailing
# Trailing
# Leading
lambda x, y: x, y # Trailing
# Trailing
# Leading
lambda x, /, y: x # Trailing
# Trailing
# Leading
lambda x: lambda y: lambda z: x # Trailing
# Trailing
# Leading
lambda x: lambda y: lambda z: (x, y, z) # Trailing
# Trailing
# Leading
lambda x: lambda y: lambda z: (x, y, z) # Trailing
# Trailing
# Leading
lambda x: lambda y: lambda z: (
x,
y,
y,
y,
y,
y,
y,
y,
y,
y,
y,
y,
y,
y,
y,
y,
y,
y,
y,
y,
y,
y,
z,
) # Trailing
# Trailing
a = (
lambda: # Dangling
1
)
a = (
lambda
x, # Dangling
y: 1
)
# Regression test: lambda empty arguments ranges were too long, leading to unstable
# formatting
(
lambda: ( #
),
)
# lambda arguments don't have parentheses, so we never add a magic trailing comma ...
def f(
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa: bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb = lambda x: y,
):
pass
# ...but we do preserve a trailing comma after the arguments
a = lambda b,: 0
lambda a,: 0
lambda *args,: 0
lambda **kwds,: 0
lambda a, *args,: 0
lambda a, **kwds,: 0
lambda *args, b,: 0
lambda *, b,: 0
lambda *args, **kwds,: 0
lambda a, *args, b,: 0
lambda a, *, b,: 0
lambda a, *args, **kwds,: 0
lambda *args, b, **kwds,: 0
lambda *, b, **kwds,: 0
lambda a, *args, b, **kwds,: 0
lambda a, *, b, **kwds,: 0
lambda a, /: a
lambda a, /, c: a
# Dangling comments without parameters.
(
lambda: # 3
None
)
(
lambda:
# 3
None
)
(
lambda: # 1
# 2
# 3
# 4
None # 5
)
(
lambda
# comment
*x: x
)
(
lambda
# comment
*x,
**y: x
)
(
lambda
# comment 1
# comment 2
*x:
# comment 3
x
)
(
lambda
# comment 1
# comment 2
*x,
**y:
# comment 3
x
)
(
lambda # comment 1
# comment 2
*x: # comment 3
x
)
(
lambda # comment 1
# comment 2
*x,
y: # comment 3
x
)
lambda *x: x
(
lambda
# comment
*x: x
)
lambda: ( # comment
x
)
(
lambda: # comment
x
)
(
lambda:
# comment
x
)
(
lambda: # comment
x
)
(
lambda:
# comment
x
)
(
lambda: # comment
( # comment
x
)
)
(
lambda # 1
# 2
x: # 3
# 4
# 5
# 6
x
)
(
lambda # 1
# 2
x, # 3
# 4
y: # 5
# 6
x
)
(
lambda
x,
# comment
y: z
)
# Leading
lambda x: (
lambda y: lambda z: x
+ y
+ y
+ y
+ y
+ y
+ y
+ y
+ y
+ y
+ y
+ y
+ y
+ y
+ y
+ y
+ y
+ y
+ y
+ y
+ y
+ y
+ z # Trailing
) # Trailing
# Leading
lambda x: lambda y: lambda z: [
x,
y,
y,
y,
y,
y,
y,
y,
y,
y,
y,
y,
y,
y,
y,
y,
y,
y,
y,
y,
y,
y,
y,
y,
y,
y,
y,
y,
y,
y,
z,
] # Trailing
# Trailing
lambda self, araa, kkkwargs=aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa(
*args, **kwargs
), e=1, f=2, g=2: d
# Regression tests for https://github.com/astral-sh/ruff/issues/8179
def a():
return b(
c,
d,
e,
f=lambda
self,
*args,
**kwargs: aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa(*args, **kwargs),
)
def a():
return b(
c,
d,
e,
f=lambda
self,
araa,
kkkwargs,
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa,