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---
source: crates/ruff_python_parser/tests/fixtures.rs
input_file: crates/ruff_python_parser/resources/invalid/statements/match/unary_add_usage.py
---
## AST
```
Module(
ModModule {
node_index: NodeIndex(None),
range: 0..269,
body: [
Match(
StmtMatch {
node_index: NodeIndex(None),
range: 74..268,
subject: Name(
ExprName {
node_index: NodeIndex(None),
range: 80..87,
id: Name("subject"),
ctx: Load,
},
),
cases: [
MatchCase {
range: 93..114,
node_index: NodeIndex(None),
pattern: MatchValue(
PatternMatchValue {
node_index: NodeIndex(None),
range: 98..100,
value: UnaryOp(
ExprUnaryOp {
node_index: NodeIndex(None),
range: 98..100,
op: UAdd,
operand: NumberLiteral(
ExprNumberLiteral {
node_index: NodeIndex(None),
range: 99..100,
value: Int(
1,
),
},
),
},
),
},
),
guard: None,
body: [
Pass(
StmtPass {
node_index: NodeIndex(None),
range: 110..114,
},
),
],
},
MatchCase {
range: 119..149,
node_index: NodeIndex(None),
pattern: MatchOr(
PatternMatchOr {
node_index: NodeIndex(None),
range: 124..135,
patterns: [
MatchValue(
PatternMatchValue {
node_index: NodeIndex(None),
range: 124..125,
value: NumberLiteral(
ExprNumberLiteral {
node_index: NodeIndex(None),
range: 124..125,
value: Int(
1,
),
},
),
},
),
MatchValue(
PatternMatchValue {
node_index: NodeIndex(None),
range: 128..130,
value: UnaryOp(
ExprUnaryOp {
node_index: NodeIndex(None),
range: 128..130,
op: UAdd,
operand: NumberLiteral(
ExprNumberLiteral {
node_index: NodeIndex(None),
range: 129..130,
value: Int(
2,
),
},
),
},
),
},
),
MatchValue(
PatternMatchValue {
node_index: NodeIndex(None),
range: 133..135,
value: UnaryOp(
ExprUnaryOp {
node_index: NodeIndex(None),
range: 133..135,
op: USub,
operand: NumberLiteral(
ExprNumberLiteral {
node_index: NodeIndex(None),
range: 134..135,
value: Int(
3,
),
},
),
},
),
},
),
],
},
),
guard: None,
body: [
Pass(
StmtPass {
node_index: NodeIndex(None),
range: 145..149,
},
),
],
},
MatchCase {
range: 154..184,
node_index: NodeIndex(None),
pattern: MatchSequence(
PatternMatchSequence {
node_index: NodeIndex(None),
range: 159..170,
patterns: [
MatchValue(
PatternMatchValue {
node_index: NodeIndex(None),
range: 160..161,
value: NumberLiteral(
ExprNumberLiteral {
node_index: NodeIndex(None),
range: 160..161,
value: Int(
1,
),
},
),
},
),
MatchValue(
PatternMatchValue {
node_index: NodeIndex(None),
range: 163..165,
value: UnaryOp(
ExprUnaryOp {
node_index: NodeIndex(None),
range: 163..165,
op: UAdd,
operand: NumberLiteral(
ExprNumberLiteral {
node_index: NodeIndex(None),
range: 164..165,
value: Int(
2,
),
},
),
},
),
},
),
MatchValue(
PatternMatchValue {
node_index: NodeIndex(None),
range: 167..169,
value: UnaryOp(
ExprUnaryOp {
node_index: NodeIndex(None),
range: 167..169,
op: USub,
operand: NumberLiteral(
ExprNumberLiteral {
node_index: NodeIndex(None),
range: 168..169,
value: Int(
3,
),
},
),
},
),
},
),
],
},
),
guard: None,
body: [
Pass(
StmtPass {
node_index: NodeIndex(None),
range: 180..184,
},
),
],
},
MatchCase {
range: 189..223,
node_index: NodeIndex(None),
pattern: MatchClass(
PatternMatchClass {
node_index: NodeIndex(None),
range: 194..209,
cls: Name(
ExprName {
node_index: NodeIndex(None),
range: 194..197,
id: Name("Foo"),
ctx: Load,
},
),
arguments: PatternArguments {
range: 197..209,
node_index: NodeIndex(None),
patterns: [],
keywords: [
PatternKeyword {
range: 198..202,
node_index: NodeIndex(None),
attr: Identifier {
id: Name("x"),
range: 198..199,
node_index: NodeIndex(None),
},
pattern: MatchValue(
PatternMatchValue {
node_index: NodeIndex(None),
range: 200..202,
value: UnaryOp(
ExprUnaryOp {
node_index: NodeIndex(None),
range: 200..202,
op: UAdd,
operand: NumberLiteral(
ExprNumberLiteral {
node_index: NodeIndex(None),
range: 201..202,
value: Int(
1,
),
},
),
},
),
},
),
},
PatternKeyword {
range: 204..208,
node_index: NodeIndex(None),
attr: Identifier {
id: Name("y"),
range: 204..205,
node_index: NodeIndex(None),
},
pattern: MatchValue(
PatternMatchValue {
node_index: NodeIndex(None),
range: 206..208,
value: UnaryOp(
ExprUnaryOp {
node_index: NodeIndex(None),
range: 206..208,
op: USub,
operand: NumberLiteral(
ExprNumberLiteral {
node_index: NodeIndex(None),
range: 207..208,
value: Int(
2,
),
},
),
},
),
},
),
},
],
},
},
),
guard: None,
body: [
Pass(
StmtPass {
node_index: NodeIndex(None),
range: 219..223,
},
),
],
},
MatchCase {
range: 228..268,
node_index: NodeIndex(None),
pattern: MatchMapping(
PatternMatchMapping {
node_index: NodeIndex(None),
range: 233..254,
keys: [
BooleanLiteral(
ExprBooleanLiteral {
node_index: NodeIndex(None),
range: 234..238,
value: true,
},
),
BooleanLiteral(
ExprBooleanLiteral {
node_index: NodeIndex(None),
range: 244..249,
value: false,
},
),
],
patterns: [
MatchValue(
PatternMatchValue {
node_index: NodeIndex(None),
range: 240..242,
value: UnaryOp(
ExprUnaryOp {
node_index: NodeIndex(None),
range: 240..242,
op: UAdd,
operand: NumberLiteral(
ExprNumberLiteral {
node_index: NodeIndex(None),
range: 241..242,
value: Int(
1,
),
},
),
},
),
},
),
MatchValue(
PatternMatchValue {
node_index: NodeIndex(None),
range: 251..253,
value: UnaryOp(
ExprUnaryOp {
node_index: NodeIndex(None),
range: 251..253,
op: USub,
operand: NumberLiteral(
ExprNumberLiteral {
node_index: NodeIndex(None),
range: 252..253,
value: Int(
2,
),
},
),
},
),
},
),
],
rest: None,
},
),
guard: None,
body: [
Pass(
StmtPass {
node_index: NodeIndex(None),
range: 264..268,
},
),
],
},
],
},
),
],
},
)
```
## Errors
|
1 | # Unary addition isn't allowed but we parse it for better error recovery.
2 | match subject:
3 | case +1:
| ^^ Syntax Error: Unary '+' is not allowed as a literal pattern
4 | pass
5 | case 1 | +2 | -3:
|
|
3 | case +1:
4 | pass
5 | case 1 | +2 | -3:
| ^^ Syntax Error: Unary '+' is not allowed as a literal pattern
6 | pass
7 | case [1, +2, -3]:
|
|
5 | case 1 | +2 | -3:
6 | pass
7 | case [1, +2, -3]:
| ^^ Syntax Error: Unary '+' is not allowed as a literal pattern
8 | pass
9 | case Foo(x=+1, y=-2):
|
|
7 | case [1, +2, -3]:
8 | pass
9 | case Foo(x=+1, y=-2):
| ^^ Syntax Error: Unary '+' is not allowed as a literal pattern
10 | pass
11 | case {True: +1, False: -2}:
|
|
9 | case Foo(x=+1, y=-2):
10 | pass
11 | case {True: +1, False: -2}:
| ^^ Syntax Error: Unary '+' is not allowed as a literal pattern
12 | pass
|