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---
source: crates/ruff_python_parser/tests/fixtures.rs
input_file: crates/ruff_python_parser/resources/invalid/statements/match/invalid_class_pattern.py
---
## AST
```
Module(
ModModule {
node_index: NodeIndex(None),
range: 0..383,
body: [
Match(
StmtMatch {
node_index: NodeIndex(None),
range: 44..285,
subject: Name(
ExprName {
node_index: NodeIndex(None),
range: 50..57,
id: Name("subject"),
ctx: Load,
},
),
cases: [
MatchCase {
range: 63..97,
node_index: NodeIndex(None),
pattern: MatchClass(
PatternMatchClass {
node_index: NodeIndex(None),
range: 68..83,
cls: Name(
ExprName {
node_index: NodeIndex(None),
range: 68..71,
id: Name("Foo"),
ctx: Load,
},
),
arguments: PatternArguments {
range: 71..83,
node_index: NodeIndex(None),
patterns: [],
keywords: [
PatternKeyword {
range: 72..82,
node_index: NodeIndex(None),
attr: Identifier {
id: Name(""),
range: 80..80,
node_index: NodeIndex(None),
},
pattern: MatchValue(
PatternMatchValue {
node_index: NodeIndex(None),
range: 81..82,
value: NumberLiteral(
ExprNumberLiteral {
node_index: NodeIndex(None),
range: 81..82,
value: Int(
1,
),
},
),
},
),
},
],
},
},
),
guard: None,
body: [
Pass(
StmtPass {
node_index: NodeIndex(None),
range: 93..97,
},
),
],
},
MatchCase {
range: 102..135,
node_index: NodeIndex(None),
pattern: MatchClass(
PatternMatchClass {
node_index: NodeIndex(None),
range: 107..121,
cls: Name(
ExprName {
node_index: NodeIndex(None),
range: 107..110,
id: Name("Foo"),
ctx: Load,
},
),
arguments: PatternArguments {
range: 110..121,
node_index: NodeIndex(None),
patterns: [],
keywords: [
PatternKeyword {
range: 111..120,
node_index: NodeIndex(None),
attr: Identifier {
id: Name(""),
range: 118..118,
node_index: NodeIndex(None),
},
pattern: MatchValue(
PatternMatchValue {
node_index: NodeIndex(None),
range: 119..120,
value: NumberLiteral(
ExprNumberLiteral {
node_index: NodeIndex(None),
range: 119..120,
value: Int(
1,
),
},
),
},
),
},
],
},
},
),
guard: None,
body: [
Pass(
StmtPass {
node_index: NodeIndex(None),
range: 131..135,
},
),
],
},
MatchCase {
range: 140..174,
node_index: NodeIndex(None),
pattern: MatchClass(
PatternMatchClass {
node_index: NodeIndex(None),
range: 145..160,
cls: Name(
ExprName {
node_index: NodeIndex(None),
range: 145..148,
id: Name("Foo"),
ctx: Load,
},
),
arguments: PatternArguments {
range: 148..160,
node_index: NodeIndex(None),
patterns: [],
keywords: [
PatternKeyword {
range: 149..159,
node_index: NodeIndex(None),
attr: Identifier {
id: Name(""),
range: 157..157,
node_index: NodeIndex(None),
},
pattern: MatchValue(
PatternMatchValue {
node_index: NodeIndex(None),
range: 158..159,
value: NumberLiteral(
ExprNumberLiteral {
node_index: NodeIndex(None),
range: 158..159,
value: Int(
1,
),
},
),
},
),
},
],
},
},
),
guard: None,
body: [
Pass(
StmtPass {
node_index: NodeIndex(None),
range: 170..174,
},
),
],
},
MatchCase {
range: 179..217,
node_index: NodeIndex(None),
pattern: MatchClass(
PatternMatchClass {
node_index: NodeIndex(None),
range: 184..203,
cls: Name(
ExprName {
node_index: NodeIndex(None),
range: 184..187,
id: Name("Foo"),
ctx: Load,
},
),
arguments: PatternArguments {
range: 187..203,
node_index: NodeIndex(None),
patterns: [],
keywords: [
PatternKeyword {
range: 188..202,
node_index: NodeIndex(None),
attr: Identifier {
id: Name(""),
range: 200..200,
node_index: NodeIndex(None),
},
pattern: MatchValue(
PatternMatchValue {
node_index: NodeIndex(None),
range: 201..202,
value: NumberLiteral(
ExprNumberLiteral {
node_index: NodeIndex(None),
range: 201..202,
value: Int(
1,
),
},
),
},
),
},
],
},
},
),
guard: None,
body: [
Pass(
StmtPass {
node_index: NodeIndex(None),
range: 213..217,
},
),
],
},
MatchCase {
range: 222..249,
node_index: NodeIndex(None),
pattern: MatchClass(
PatternMatchClass {
node_index: NodeIndex(None),
range: 227..235,
cls: Name(
ExprName {
node_index: NodeIndex(None),
range: 227..230,
id: Name("Foo"),
ctx: Load,
},
),
arguments: PatternArguments {
range: 230..235,
node_index: NodeIndex(None),
patterns: [],
keywords: [
PatternKeyword {
range: 231..234,
node_index: NodeIndex(None),
attr: Identifier {
id: Name(""),
range: 233..233,
node_index: NodeIndex(None),
},
pattern: MatchValue(
PatternMatchValue {
node_index: NodeIndex(None),
range: 233..234,
value: NumberLiteral(
ExprNumberLiteral {
node_index: NodeIndex(None),
range: 233..234,
value: Int(
1,
),
},
),
},
),
},
],
},
},
),
guard: None,
body: [
Pass(
StmtPass {
node_index: NodeIndex(None),
range: 245..249,
},
),
],
},
MatchCase {
range: 254..285,
node_index: NodeIndex(None),
pattern: MatchClass(
PatternMatchClass {
node_index: NodeIndex(None),
range: 259..271,
cls: Name(
ExprName {
node_index: NodeIndex(None),
range: 259..262,
id: Name("Foo"),
ctx: Load,
},
),
arguments: PatternArguments {
range: 262..271,
node_index: NodeIndex(None),
patterns: [],
keywords: [
PatternKeyword {
range: 263..270,
node_index: NodeIndex(None),
attr: Identifier {
id: Name(""),
range: 269..269,
node_index: NodeIndex(None),
},
pattern: MatchValue(
PatternMatchValue {
node_index: NodeIndex(None),
range: 269..270,
value: NumberLiteral(
ExprNumberLiteral {
node_index: NodeIndex(None),
range: 269..270,
value: Int(
1,
),
},
),
},
),
},
],
},
},
),
guard: None,
body: [
Pass(
StmtPass {
node_index: NodeIndex(None),
range: 281..285,
},
),
],
},
],
},
),
],
},
)
```
## Errors
|
1 | # Invalid keyword pattern in class argument
2 | match subject:
3 | case Foo(x as y = 1):
| ^^^^^^ Syntax Error: Expected an identifier for the keyword pattern
4 | pass
5 | case Foo(x | y = 1):
|
|
3 | case Foo(x as y = 1):
4 | pass
5 | case Foo(x | y = 1):
| ^^^^^ Syntax Error: Expected an identifier for the keyword pattern
6 | pass
7 | case Foo([x, y] = 1):
|
|
5 | case Foo(x | y = 1):
6 | pass
7 | case Foo([x, y] = 1):
| ^^^^^^ Syntax Error: Expected an identifier for the keyword pattern
8 | pass
9 | case Foo({False: 0} = 1):
|
|
7 | case Foo([x, y] = 1):
8 | pass
9 | case Foo({False: 0} = 1):
| ^^^^^^^^^^ Syntax Error: Expected an identifier for the keyword pattern
10 | pass
11 | case Foo(1=1):
|
|
9 | case Foo({False: 0} = 1):
10 | pass
11 | case Foo(1=1):
| ^ Syntax Error: Expected an identifier for the keyword pattern
12 | pass
13 | case Foo(Bar()=1):
|
|
11 | case Foo(1=1):
12 | pass
13 | case Foo(Bar()=1):
| ^^^^^ Syntax Error: Expected an identifier for the keyword pattern
14 | pass
15 | # Positional pattern cannot follow keyword pattern
|