[syntax-errors]: multiple-starred-expressions (F622) (#20243)

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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>
This commit is contained in:
Bhuminjay Soni 2025-09-25 01:02:55 +05:30 committed by GitHub
parent 73b4b1ed17
commit e6073d0cca
No known key found for this signature in database
GPG key ID: B5690EEEBB952194
8 changed files with 783 additions and 20 deletions

View file

@ -0,0 +1,520 @@
---
source: crates/ruff_python_parser/tests/fixtures.rs
input_file: crates/ruff_python_parser/resources/inline/err/multiple_starred_assignment_target.py
---
## AST
```
Module(
ModModule {
node_index: NodeIndex(None),
range: 0..112,
body: [
Assign(
StmtAssign {
node_index: NodeIndex(None),
range: 0..17,
targets: [
Tuple(
ExprTuple {
node_index: NodeIndex(None),
range: 0..8,
elts: [
Starred(
ExprStarred {
node_index: NodeIndex(None),
range: 1..3,
value: Name(
ExprName {
node_index: NodeIndex(None),
range: 2..3,
id: Name("a"),
ctx: Store,
},
),
ctx: Store,
},
),
Starred(
ExprStarred {
node_index: NodeIndex(None),
range: 5..7,
value: Name(
ExprName {
node_index: NodeIndex(None),
range: 6..7,
id: Name("b"),
ctx: Store,
},
),
ctx: Store,
},
),
],
ctx: Store,
parenthesized: true,
},
),
],
value: Tuple(
ExprTuple {
node_index: NodeIndex(None),
range: 11..17,
elts: [
NumberLiteral(
ExprNumberLiteral {
node_index: NodeIndex(None),
range: 12..13,
value: Int(
1,
),
},
),
NumberLiteral(
ExprNumberLiteral {
node_index: NodeIndex(None),
range: 15..16,
value: Int(
2,
),
},
),
],
ctx: Load,
parenthesized: true,
},
),
},
),
Assign(
StmtAssign {
node_index: NodeIndex(None),
range: 18..35,
targets: [
List(
ExprList {
node_index: NodeIndex(None),
range: 18..26,
elts: [
Starred(
ExprStarred {
node_index: NodeIndex(None),
range: 19..21,
value: Name(
ExprName {
node_index: NodeIndex(None),
range: 20..21,
id: Name("a"),
ctx: Store,
},
),
ctx: Store,
},
),
Starred(
ExprStarred {
node_index: NodeIndex(None),
range: 23..25,
value: Name(
ExprName {
node_index: NodeIndex(None),
range: 24..25,
id: Name("b"),
ctx: Store,
},
),
ctx: Store,
},
),
],
ctx: Store,
},
),
],
value: Tuple(
ExprTuple {
node_index: NodeIndex(None),
range: 29..35,
elts: [
NumberLiteral(
ExprNumberLiteral {
node_index: NodeIndex(None),
range: 30..31,
value: Int(
1,
),
},
),
NumberLiteral(
ExprNumberLiteral {
node_index: NodeIndex(None),
range: 33..34,
value: Int(
2,
),
},
),
],
ctx: Load,
parenthesized: true,
},
),
},
),
Assign(
StmtAssign {
node_index: NodeIndex(None),
range: 36..59,
targets: [
Tuple(
ExprTuple {
node_index: NodeIndex(None),
range: 36..47,
elts: [
Starred(
ExprStarred {
node_index: NodeIndex(None),
range: 37..39,
value: Name(
ExprName {
node_index: NodeIndex(None),
range: 38..39,
id: Name("a"),
ctx: Store,
},
),
ctx: Store,
},
),
Starred(
ExprStarred {
node_index: NodeIndex(None),
range: 41..43,
value: Name(
ExprName {
node_index: NodeIndex(None),
range: 42..43,
id: Name("b"),
ctx: Store,
},
),
ctx: Store,
},
),
Name(
ExprName {
node_index: NodeIndex(None),
range: 45..46,
id: Name("c"),
ctx: Store,
},
),
],
ctx: Store,
parenthesized: true,
},
),
],
value: Tuple(
ExprTuple {
node_index: NodeIndex(None),
range: 50..59,
elts: [
NumberLiteral(
ExprNumberLiteral {
node_index: NodeIndex(None),
range: 51..52,
value: Int(
1,
),
},
),
NumberLiteral(
ExprNumberLiteral {
node_index: NodeIndex(None),
range: 54..55,
value: Int(
2,
),
},
),
NumberLiteral(
ExprNumberLiteral {
node_index: NodeIndex(None),
range: 57..58,
value: Int(
3,
),
},
),
],
ctx: Load,
parenthesized: true,
},
),
},
),
Assign(
StmtAssign {
node_index: NodeIndex(None),
range: 60..83,
targets: [
List(
ExprList {
node_index: NodeIndex(None),
range: 60..71,
elts: [
Starred(
ExprStarred {
node_index: NodeIndex(None),
range: 61..63,
value: Name(
ExprName {
node_index: NodeIndex(None),
range: 62..63,
id: Name("a"),
ctx: Store,
},
),
ctx: Store,
},
),
Starred(
ExprStarred {
node_index: NodeIndex(None),
range: 65..67,
value: Name(
ExprName {
node_index: NodeIndex(None),
range: 66..67,
id: Name("b"),
ctx: Store,
},
),
ctx: Store,
},
),
Name(
ExprName {
node_index: NodeIndex(None),
range: 69..70,
id: Name("c"),
ctx: Store,
},
),
],
ctx: Store,
},
),
],
value: Tuple(
ExprTuple {
node_index: NodeIndex(None),
range: 74..83,
elts: [
NumberLiteral(
ExprNumberLiteral {
node_index: NodeIndex(None),
range: 75..76,
value: Int(
1,
),
},
),
NumberLiteral(
ExprNumberLiteral {
node_index: NodeIndex(None),
range: 78..79,
value: Int(
2,
),
},
),
NumberLiteral(
ExprNumberLiteral {
node_index: NodeIndex(None),
range: 81..82,
value: Int(
3,
),
},
),
],
ctx: Load,
parenthesized: true,
},
),
},
),
Assign(
StmtAssign {
node_index: NodeIndex(None),
range: 84..111,
targets: [
Tuple(
ExprTuple {
node_index: NodeIndex(None),
range: 84..102,
elts: [
Starred(
ExprStarred {
node_index: NodeIndex(None),
range: 85..87,
value: Name(
ExprName {
node_index: NodeIndex(None),
range: 86..87,
id: Name("a"),
ctx: Store,
},
),
ctx: Store,
},
),
Starred(
ExprStarred {
node_index: NodeIndex(None),
range: 89..91,
value: Name(
ExprName {
node_index: NodeIndex(None),
range: 90..91,
id: Name("b"),
ctx: Store,
},
),
ctx: Store,
},
),
Tuple(
ExprTuple {
node_index: NodeIndex(None),
range: 93..101,
elts: [
Starred(
ExprStarred {
node_index: NodeIndex(None),
range: 94..96,
value: Name(
ExprName {
node_index: NodeIndex(None),
range: 95..96,
id: Name("c"),
ctx: Store,
},
),
ctx: Store,
},
),
Starred(
ExprStarred {
node_index: NodeIndex(None),
range: 98..100,
value: Name(
ExprName {
node_index: NodeIndex(None),
range: 99..100,
id: Name("d"),
ctx: Store,
},
),
ctx: Store,
},
),
],
ctx: Store,
parenthesized: true,
},
),
],
ctx: Store,
parenthesized: true,
},
),
],
value: Tuple(
ExprTuple {
node_index: NodeIndex(None),
range: 105..111,
elts: [
NumberLiteral(
ExprNumberLiteral {
node_index: NodeIndex(None),
range: 106..107,
value: Int(
1,
),
},
),
NumberLiteral(
ExprNumberLiteral {
node_index: NodeIndex(None),
range: 109..110,
value: Int(
2,
),
},
),
],
ctx: Load,
parenthesized: true,
},
),
},
),
],
},
)
```
## Semantic Syntax Errors
|
1 | (*a, *b) = (1, 2)
| ^^^^^^^^ Syntax Error: Two starred expressions in assignment
2 | [*a, *b] = (1, 2)
3 | (*a, *b, c) = (1, 2, 3)
|
|
1 | (*a, *b) = (1, 2)
2 | [*a, *b] = (1, 2)
| ^^^^^^^^ Syntax Error: Two starred expressions in assignment
3 | (*a, *b, c) = (1, 2, 3)
4 | [*a, *b, c] = (1, 2, 3)
|
|
1 | (*a, *b) = (1, 2)
2 | [*a, *b] = (1, 2)
3 | (*a, *b, c) = (1, 2, 3)
| ^^^^^^^^^^^ Syntax Error: Two starred expressions in assignment
4 | [*a, *b, c] = (1, 2, 3)
5 | (*a, *b, (*c, *d)) = (1, 2)
|
|
2 | [*a, *b] = (1, 2)
3 | (*a, *b, c) = (1, 2, 3)
4 | [*a, *b, c] = (1, 2, 3)
| ^^^^^^^^^^^ Syntax Error: Two starred expressions in assignment
5 | (*a, *b, (*c, *d)) = (1, 2)
|
|
3 | (*a, *b, c) = (1, 2, 3)
4 | [*a, *b, c] = (1, 2, 3)
5 | (*a, *b, (*c, *d)) = (1, 2)
| ^^^^^^^^^^^^^^^^^^ Syntax Error: Two starred expressions in assignment
|
|
3 | (*a, *b, c) = (1, 2, 3)
4 | [*a, *b, c] = (1, 2, 3)
5 | (*a, *b, (*c, *d)) = (1, 2)
| ^^^^^^^^ Syntax Error: Two starred expressions in assignment
|

View file

@ -0,0 +1,188 @@
---
source: crates/ruff_python_parser/tests/fixtures.rs
input_file: crates/ruff_python_parser/resources/inline/ok/multiple_starred_assignment_target.py
---
## AST
```
Module(
ModModule {
node_index: NodeIndex(None),
range: 0..46,
body: [
Assign(
StmtAssign {
node_index: NodeIndex(None),
range: 0..16,
targets: [
Tuple(
ExprTuple {
node_index: NodeIndex(None),
range: 0..7,
elts: [
Starred(
ExprStarred {
node_index: NodeIndex(None),
range: 1..3,
value: Name(
ExprName {
node_index: NodeIndex(None),
range: 2..3,
id: Name("a"),
ctx: Store,
},
),
ctx: Store,
},
),
Name(
ExprName {
node_index: NodeIndex(None),
range: 5..6,
id: Name("b"),
ctx: Store,
},
),
],
ctx: Store,
parenthesized: true,
},
),
],
value: Tuple(
ExprTuple {
node_index: NodeIndex(None),
range: 10..16,
elts: [
NumberLiteral(
ExprNumberLiteral {
node_index: NodeIndex(None),
range: 11..12,
value: Int(
1,
),
},
),
NumberLiteral(
ExprNumberLiteral {
node_index: NodeIndex(None),
range: 14..15,
value: Int(
2,
),
},
),
],
ctx: Load,
parenthesized: true,
},
),
},
),
Assign(
StmtAssign {
node_index: NodeIndex(None),
range: 17..45,
targets: [
Tuple(
ExprTuple {
node_index: NodeIndex(None),
range: 17..33,
elts: [
Tuple(
ExprTuple {
node_index: NodeIndex(None),
range: 17..29,
elts: [
Starred(
ExprStarred {
node_index: NodeIndex(None),
range: 18..20,
value: Name(
ExprName {
node_index: NodeIndex(None),
range: 19..20,
id: Name("_"),
ctx: Store,
},
),
ctx: Store,
},
),
Name(
ExprName {
node_index: NodeIndex(None),
range: 22..28,
id: Name("normed"),
ctx: Store,
},
),
],
ctx: Store,
parenthesized: true,
},
),
Starred(
ExprStarred {
node_index: NodeIndex(None),
range: 31..33,
value: Name(
ExprName {
node_index: NodeIndex(None),
range: 32..33,
id: Name("_"),
ctx: Store,
},
),
ctx: Store,
},
),
],
ctx: Store,
parenthesized: false,
},
),
],
value: List(
ExprList {
node_index: NodeIndex(None),
range: 36..45,
elts: [
Tuple(
ExprTuple {
node_index: NodeIndex(None),
range: 37..41,
elts: [
NumberLiteral(
ExprNumberLiteral {
node_index: NodeIndex(None),
range: 38..39,
value: Int(
1,
),
},
),
],
ctx: Load,
parenthesized: true,
},
),
NumberLiteral(
ExprNumberLiteral {
node_index: NodeIndex(None),
range: 43..44,
value: Int(
2,
),
},
),
],
ctx: Load,
},
),
},
),
],
},
)
```