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## Summary Part of #17412 Starred expressions cannot be used as values in assignment expressions. Add a new semantic syntax error to catch such instances. Note that we already have `ParseErrorType::InvalidStarredExpressionUsage` to catch some starred expression errors during parsing, but that does not cover top level assignment expressions. ## Test Plan - Added new inline tests for the new rule - Found some examples marked as "valid" in existing tests (`_ = *data`), which are not really valid (per this new rule) and updated them - There was an existing inline test - `assign_stmt_invalid_value_expr` which had instances of `*` expression which would be deemed invalid by this new rule. Converted these to tuples, so that they do not trigger this new rule.
944 lines
38 KiB
Text
944 lines
38 KiB
Text
---
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source: crates/ruff_python_parser/tests/fixtures.rs
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input_file: crates/ruff_python_parser/resources/valid/statement/assignment.py
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---
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## AST
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```
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|
Module(
|
|
ModModule {
|
|
range: 0..729,
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|
body: [
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Assign(
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StmtAssign {
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Assign(
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StmtAssign {
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List(
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ExprList {
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Name(
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ExprName {
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id: Name("x"),
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Name(
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value: Tuple(
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ExprTuple {
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elts: [
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NumberLiteral(
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ExprNumberLiteral {
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value: Int(
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1,
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NumberLiteral(
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NumberLiteral(
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ExprNumberLiteral {
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Assign(
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StmtAssign {
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Attribute(
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attr: Identifier {
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ExprTuple {
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NumberLiteral(
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ExprNumberLiteral {
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NumberLiteral(
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ExprNumberLiteral {
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},
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|
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NumberLiteral(
|
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ExprNumberLiteral {
|
|
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|
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|
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ctx: Load,
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|
parenthesized: true,
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|
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Assign(
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StmtAssign {
|
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targets: [
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Subscript(
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ExprSubscript {
|
|
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|
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|
|
ExprName {
|
|
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|
|
id: Name("x"),
|
|
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|
|
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|
|
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|
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slice: Name(
|
|
ExprName {
|
|
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|
|
id: Name("y"),
|
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|
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},
|
|
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|
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ctx: Store,
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},
|
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|
|
],
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value: Tuple(
|
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ExprTuple {
|
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|
|
elts: [
|
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NumberLiteral(
|
|
ExprNumberLiteral {
|
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|
|
value: Int(
|
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1,
|
|
),
|
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},
|
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|
|
NumberLiteral(
|
|
ExprNumberLiteral {
|
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range: 83..84,
|
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value: Int(
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2,
|
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),
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},
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|
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NumberLiteral(
|
|
ExprNumberLiteral {
|
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|
|
value: Int(
|
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|
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|
|
},
|
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),
|
|
],
|
|
ctx: Load,
|
|
parenthesized: true,
|
|
},
|
|
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|
|
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|
|
),
|
|
Assign(
|
|
StmtAssign {
|
|
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|
|
targets: [
|
|
Tuple(
|
|
ExprTuple {
|
|
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|
|
elts: [
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Name(
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ExprName {
|
|
range: 91..92,
|
|
id: Name("x"),
|
|
ctx: Store,
|
|
},
|
|
),
|
|
Starred(
|
|
ExprStarred {
|
|
range: 94..96,
|
|
value: Name(
|
|
ExprName {
|
|
range: 95..96,
|
|
id: Name("y"),
|
|
ctx: Store,
|
|
},
|
|
),
|
|
ctx: Store,
|
|
},
|
|
),
|
|
],
|
|
ctx: Store,
|
|
parenthesized: true,
|
|
},
|
|
),
|
|
],
|
|
value: Tuple(
|
|
ExprTuple {
|
|
range: 100..109,
|
|
elts: [
|
|
NumberLiteral(
|
|
ExprNumberLiteral {
|
|
range: 101..102,
|
|
value: Int(
|
|
1,
|
|
),
|
|
},
|
|
),
|
|
NumberLiteral(
|
|
ExprNumberLiteral {
|
|
range: 104..105,
|
|
value: Int(
|
|
2,
|
|
),
|
|
},
|
|
),
|
|
NumberLiteral(
|
|
ExprNumberLiteral {
|
|
range: 107..108,
|
|
value: Int(
|
|
3,
|
|
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|
|
},
|
|
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|
|
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|
|
ctx: Load,
|
|
parenthesized: true,
|
|
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|
|
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|
|
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|
|
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|
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Assign(
|
|
StmtAssign {
|
|
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|
|
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|
|
List(
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|
ExprList {
|
|
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Name(
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|
|
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|
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|
|
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|
|
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|
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Name(
|
|
ExprName {
|
|
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|
|
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|
|
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|
|
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|
|
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Name(
|
|
ExprName {
|
|
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|
|
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|
|
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|
|
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|
|
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|
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|
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|
|
},
|
|
),
|
|
],
|
|
value: List(
|
|
ExprList {
|
|
range: 271..280,
|
|
elts: [
|
|
NumberLiteral(
|
|
ExprNumberLiteral {
|
|
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|
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|
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|
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|
|
NumberLiteral(
|
|
ExprNumberLiteral {
|
|
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|
|
value: Int(
|
|
2,
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|
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|
|
},
|
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|
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NumberLiteral(
|
|
ExprNumberLiteral {
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|
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|
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|
3,
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|
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|
|
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|
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|
|
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|
|
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|
|
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|
|
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|
|
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|
|
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|
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Assign(
|
|
StmtAssign {
|
|
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|
|
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|
|
Tuple(
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|
ExprTuple {
|
|
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|
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|
|
Name(
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ExprName {
|
|
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|
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|
|
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|
|
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|
|
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|
|
Name(
|
|
ExprName {
|
|
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|
|
id: Name("y"),
|
|
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|
|
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|
|
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|
|
Name(
|
|
ExprName {
|
|
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|
|
id: Name("z"),
|
|
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|
|
},
|
|
),
|
|
],
|
|
ctx: Store,
|
|
parenthesized: true,
|
|
},
|
|
),
|
|
],
|
|
value: Tuple(
|
|
ExprTuple {
|
|
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|
|
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|
|
NumberLiteral(
|
|
ExprNumberLiteral {
|
|
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|
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|
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|
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NumberLiteral(
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|
ExprNumberLiteral {
|
|
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|
|
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|
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|
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|
|
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|
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NumberLiteral(
|
|
ExprNumberLiteral {
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|
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|
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|
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|
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|
|
ctx: Load,
|
|
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|
|
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|
|
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|
|
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|
|
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|
|
Assign(
|
|
StmtAssign {
|
|
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|
|
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|
|
Subscript(
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|
ExprSubscript {
|
|
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|
|
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ExprName {
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|
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|
|
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|
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|
|
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|
|
),
|
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slice: NumberLiteral(
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ExprNumberLiteral {
|
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|
},
|
|
),
|
|
],
|
|
value: NumberLiteral(
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|
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|
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|
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|
|
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|
|
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|
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|
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|
|
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|
|
Assign(
|
|
StmtAssign {
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|
|
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|
Subscript(
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|
ExprSubscript {
|
|
range: 410..414,
|
|
value: NumberLiteral(
|
|
ExprNumberLiteral {
|
|
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|
|
value: Int(
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|
5,
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|
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|
|
},
|
|
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|
|
slice: NumberLiteral(
|
|
ExprNumberLiteral {
|
|
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|
|
value: Int(
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|
0,
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|
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|
|
},
|
|
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|
|
ctx: Store,
|
|
},
|
|
),
|
|
],
|
|
value: NumberLiteral(
|
|
ExprNumberLiteral {
|
|
range: 417..419,
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|
value: Int(
|
|
42,
|
|
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|
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Assign(
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|
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|
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|
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|
|
},
|
|
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|
|
slice: Slice(
|
|
ExprSlice {
|
|
range: 422..425,
|
|
lower: Some(
|
|
NumberLiteral(
|
|
ExprNumberLiteral {
|
|
range: 422..423,
|
|
value: Int(
|
|
1,
|
|
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|
|
},
|
|
),
|
|
),
|
|
upper: Some(
|
|
NumberLiteral(
|
|
ExprNumberLiteral {
|
|
range: 424..425,
|
|
value: Int(
|
|
2,
|
|
),
|
|
},
|
|
),
|
|
),
|
|
step: None,
|
|
},
|
|
),
|
|
ctx: Store,
|
|
},
|
|
),
|
|
],
|
|
value: List(
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ExprList {
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elts: [
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NumberLiteral(
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|
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|
42,
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|
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|
},
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|
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|
|
],
|
|
ctx: Load,
|
|
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|
|
),
|
|
},
|
|
),
|
|
Assign(
|
|
StmtAssign {
|
|
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|
|
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Subscript(
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|
ExprSubscript {
|
|
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|
|
value: NumberLiteral(
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ExprNumberLiteral {
|
|
range: 529..530,
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|
value: Int(
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|
5,
|
|
),
|
|
},
|
|
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|
|
slice: Slice(
|
|
ExprSlice {
|
|
range: 531..534,
|
|
lower: Some(
|
|
NumberLiteral(
|
|
ExprNumberLiteral {
|
|
range: 531..532,
|
|
value: Int(
|
|
1,
|
|
),
|
|
},
|
|
),
|
|
),
|
|
upper: Some(
|
|
NumberLiteral(
|
|
ExprNumberLiteral {
|
|
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|
|
value: Int(
|
|
2,
|
|
),
|
|
},
|
|
),
|
|
),
|
|
step: None,
|
|
},
|
|
),
|
|
ctx: Store,
|
|
},
|
|
),
|
|
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|
|
value: List(
|
|
ExprList {
|
|
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|
|
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|
|
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|
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|
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|
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|
|
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|
|
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|
|
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|
|
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|
|
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|
|
),
|
|
Assign(
|
|
StmtAssign {
|
|
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|
|
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Attribute(
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|
ExprAttribute {
|
|
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|
|
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|
ExprName {
|
|
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|
|
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|
|
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|
|
},
|
|
),
|
|
attr: Identifier {
|
|
id: Name("bar"),
|
|
range: 548..551,
|
|
},
|
|
ctx: Store,
|
|
},
|
|
),
|
|
],
|
|
value: NumberLiteral(
|
|
ExprNumberLiteral {
|
|
range: 554..556,
|
|
value: Int(
|
|
42,
|
|
),
|
|
},
|
|
),
|
|
},
|
|
),
|
|
Assign(
|
|
StmtAssign {
|
|
range: 658..670,
|
|
targets: [
|
|
Attribute(
|
|
ExprAttribute {
|
|
range: 658..665,
|
|
value: StringLiteral(
|
|
ExprStringLiteral {
|
|
range: 658..663,
|
|
value: StringLiteralValue {
|
|
inner: Single(
|
|
StringLiteral {
|
|
range: 658..663,
|
|
value: "foo",
|
|
flags: StringLiteralFlags {
|
|
quote_style: Double,
|
|
prefix: Empty,
|
|
triple_quoted: false,
|
|
},
|
|
},
|
|
),
|
|
},
|
|
},
|
|
),
|
|
attr: Identifier {
|
|
id: Name("y"),
|
|
range: 664..665,
|
|
},
|
|
ctx: Store,
|
|
},
|
|
),
|
|
],
|
|
value: NumberLiteral(
|
|
ExprNumberLiteral {
|
|
range: 668..670,
|
|
value: Int(
|
|
42,
|
|
),
|
|
},
|
|
),
|
|
},
|
|
),
|
|
Assign(
|
|
StmtAssign {
|
|
range: 672..680,
|
|
targets: [
|
|
Name(
|
|
ExprName {
|
|
range: 672..675,
|
|
id: Name("foo"),
|
|
ctx: Store,
|
|
},
|
|
),
|
|
],
|
|
value: NumberLiteral(
|
|
ExprNumberLiteral {
|
|
range: 678..680,
|
|
value: Int(
|
|
42,
|
|
),
|
|
},
|
|
),
|
|
},
|
|
),
|
|
Assign(
|
|
StmtAssign {
|
|
range: 682..695,
|
|
targets: [
|
|
List(
|
|
ExprList {
|
|
range: 682..684,
|
|
elts: [],
|
|
ctx: Store,
|
|
},
|
|
),
|
|
],
|
|
value: Tuple(
|
|
ExprTuple {
|
|
range: 687..695,
|
|
elts: [
|
|
Starred(
|
|
ExprStarred {
|
|
range: 688..693,
|
|
value: Name(
|
|
ExprName {
|
|
range: 689..693,
|
|
id: Name("data"),
|
|
ctx: Load,
|
|
},
|
|
),
|
|
ctx: Load,
|
|
},
|
|
),
|
|
],
|
|
ctx: Load,
|
|
parenthesized: true,
|
|
},
|
|
),
|
|
},
|
|
),
|
|
Assign(
|
|
StmtAssign {
|
|
range: 696..709,
|
|
targets: [
|
|
Tuple(
|
|
ExprTuple {
|
|
range: 696..698,
|
|
elts: [],
|
|
ctx: Store,
|
|
parenthesized: true,
|
|
},
|
|
),
|
|
],
|
|
value: Tuple(
|
|
ExprTuple {
|
|
range: 701..709,
|
|
elts: [
|
|
Starred(
|
|
ExprStarred {
|
|
range: 702..707,
|
|
value: Name(
|
|
ExprName {
|
|
range: 703..707,
|
|
id: Name("data"),
|
|
ctx: Load,
|
|
},
|
|
),
|
|
ctx: Load,
|
|
},
|
|
),
|
|
],
|
|
ctx: Load,
|
|
parenthesized: true,
|
|
},
|
|
),
|
|
},
|
|
),
|
|
Assign(
|
|
StmtAssign {
|
|
range: 710..719,
|
|
targets: [
|
|
Tuple(
|
|
ExprTuple {
|
|
range: 710..714,
|
|
elts: [
|
|
Name(
|
|
ExprName {
|
|
range: 710..711,
|
|
id: Name("a"),
|
|
ctx: Store,
|
|
},
|
|
),
|
|
Name(
|
|
ExprName {
|
|
range: 713..714,
|
|
id: Name("b"),
|
|
ctx: Store,
|
|
},
|
|
),
|
|
],
|
|
ctx: Store,
|
|
parenthesized: false,
|
|
},
|
|
),
|
|
],
|
|
value: Name(
|
|
ExprName {
|
|
range: 717..719,
|
|
id: Name("ab"),
|
|
ctx: Load,
|
|
},
|
|
),
|
|
},
|
|
),
|
|
Assign(
|
|
StmtAssign {
|
|
range: 720..729,
|
|
targets: [
|
|
Name(
|
|
ExprName {
|
|
range: 720..721,
|
|
id: Name("a"),
|
|
ctx: Store,
|
|
},
|
|
),
|
|
Name(
|
|
ExprName {
|
|
range: 724..725,
|
|
id: Name("b"),
|
|
ctx: Store,
|
|
},
|
|
),
|
|
],
|
|
value: Name(
|
|
ExprName {
|
|
range: 728..729,
|
|
id: Name("c"),
|
|
ctx: Load,
|
|
},
|
|
),
|
|
},
|
|
),
|
|
],
|
|
},
|
|
)
|
|
```
|