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13ffb5bc19
(Supersedes #9152, authored by @LaBatata101) ## Summary This PR replaces the current parser generated from LALRPOP to a hand-written recursive descent parser. It also updates the grammar for [PEP 646](https://peps.python.org/pep-0646/) so that the parser outputs the correct AST. For example, in `data[*x]`, the index expression is now a tuple with a single starred expression instead of just a starred expression. Beyond the performance improvements, the parser is also error resilient and can provide better error messages. The behavior as seen by any downstream tools isn't changed. That is, the linter and formatter can still assume that the parser will _stop_ at the first syntax error. This will be updated in the following months. For more details about the change here, refer to the PR corresponding to the individual commits and the release blog post. ## Test Plan Write _lots_ and _lots_ of tests for both valid and invalid syntax and verify the output. ## Acknowledgements - @MichaReiser for reviewing 100+ parser PRs and continuously providing guidance throughout the project - @LaBatata101 for initiating the transition to a hand-written parser in #9152 - @addisoncrump for implementing the fuzzer which helped [catch](https://github.com/astral-sh/ruff/pull/10903) [a](https://github.com/astral-sh/ruff/pull/10910) [lot](https://github.com/astral-sh/ruff/pull/10966) [of](https://github.com/astral-sh/ruff/pull/10896) [bugs](https://github.com/astral-sh/ruff/pull/10877) --------- Co-authored-by: Victor Hugo Gomes <labatata101@linuxmail.org> Co-authored-by: Micha Reiser <micha@reiser.io>
490 lines
18 KiB
Text
490 lines
18 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/raise.py
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---
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## AST
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```
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Module(
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ModModule {
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range: 0..289,
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body: [
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Raise(
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StmtRaise {
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range: 8..13,
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exc: None,
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cause: None,
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},
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),
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Raise(
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StmtRaise {
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range: 14..21,
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exc: Some(
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Name(
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ExprName {
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range: 20..21,
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id: "a",
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ctx: Load,
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},
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),
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),
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cause: None,
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},
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),
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Raise(
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StmtRaise {
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range: 22..34,
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exc: Some(
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Tuple(
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ExprTuple {
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range: 28..34,
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elts: [
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Name(
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ExprName {
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range: 29..30,
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id: "a",
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ctx: Load,
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},
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),
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Name(
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ExprName {
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range: 32..33,
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id: "b",
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ctx: Load,
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},
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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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),
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),
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cause: None,
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},
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),
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Raise(
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StmtRaise {
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range: 35..46,
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exc: Some(
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Compare(
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ExprCompare {
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range: 41..46,
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left: NumberLiteral(
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ExprNumberLiteral {
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range: 41..42,
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value: Int(
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1,
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),
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},
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),
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ops: [
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Lt,
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],
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comparators: [
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NumberLiteral(
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ExprNumberLiteral {
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range: 45..46,
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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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],
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},
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),
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),
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cause: None,
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},
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),
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Raise(
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StmtRaise {
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range: 47..60,
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exc: Some(
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BoolOp(
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ExprBoolOp {
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range: 53..60,
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op: And,
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values: [
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Name(
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ExprName {
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range: 53..54,
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id: "a",
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ctx: Load,
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},
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),
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Name(
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ExprName {
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range: 59..60,
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id: "b",
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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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),
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),
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cause: None,
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},
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),
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Raise(
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StmtRaise {
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range: 61..78,
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exc: Some(
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Lambda(
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ExprLambda {
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range: 67..78,
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parameters: Some(
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Parameters {
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range: 74..75,
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posonlyargs: [],
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args: [
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ParameterWithDefault {
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range: 74..75,
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parameter: Parameter {
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range: 74..75,
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name: Identifier {
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id: "x",
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range: 74..75,
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},
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annotation: None,
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},
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default: None,
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},
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],
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vararg: None,
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kwonlyargs: [],
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kwarg: None,
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},
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),
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body: Name(
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ExprName {
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range: 77..78,
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id: "y",
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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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),
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cause: None,
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},
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),
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Raise(
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StmtRaise {
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range: 79..92,
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exc: Some(
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Await(
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ExprAwait {
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range: 85..92,
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value: Name(
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ExprName {
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range: 91..92,
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id: "x",
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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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),
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cause: None,
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},
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),
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Raise(
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StmtRaise {
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range: 93..115,
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exc: Some(
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If(
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ExprIf {
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range: 99..115,
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test: BooleanLiteral(
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ExprBooleanLiteral {
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range: 104..108,
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value: true,
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},
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),
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body: Name(
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ExprName {
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range: 99..100,
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id: "x",
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ctx: Load,
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},
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),
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orelse: Name(
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ExprName {
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range: 114..115,
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id: "y",
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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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),
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cause: None,
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},
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),
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Raise(
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StmtRaise {
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range: 138..152,
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exc: Some(
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Name(
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ExprName {
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range: 144..145,
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id: "x",
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ctx: Load,
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},
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),
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),
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cause: Some(
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Name(
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ExprName {
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range: 151..152,
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id: "a",
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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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),
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Raise(
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StmtRaise {
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range: 153..172,
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exc: Some(
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Name(
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ExprName {
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range: 159..160,
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id: "x",
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ctx: Load,
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},
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),
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),
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cause: Some(
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Tuple(
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ExprTuple {
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range: 166..172,
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elts: [
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Name(
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ExprName {
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range: 167..168,
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id: "a",
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ctx: Load,
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},
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),
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Name(
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ExprName {
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range: 170..171,
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id: "b",
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ctx: Load,
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},
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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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),
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),
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},
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),
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Raise(
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StmtRaise {
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range: 173..191,
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exc: Some(
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Name(
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ExprName {
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range: 179..180,
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id: "x",
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ctx: Load,
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},
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),
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),
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cause: Some(
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Compare(
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ExprCompare {
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range: 186..191,
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left: NumberLiteral(
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ExprNumberLiteral {
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range: 186..187,
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value: Int(
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1,
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),
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},
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),
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ops: [
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Lt,
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],
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comparators: [
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NumberLiteral(
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ExprNumberLiteral {
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range: 190..191,
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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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],
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},
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),
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),
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},
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),
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Raise(
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StmtRaise {
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range: 192..212,
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exc: Some(
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Name(
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ExprName {
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range: 198..199,
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id: "x",
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ctx: Load,
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},
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),
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),
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cause: Some(
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BoolOp(
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ExprBoolOp {
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range: 205..212,
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op: And,
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values: [
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Name(
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ExprName {
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range: 205..206,
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id: "a",
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ctx: Load,
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},
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),
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Name(
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ExprName {
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range: 211..212,
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id: "b",
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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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),
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),
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},
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),
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Raise(
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StmtRaise {
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range: 213..237,
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exc: Some(
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Name(
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ExprName {
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range: 219..220,
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id: "x",
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ctx: Load,
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},
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),
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),
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cause: Some(
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Lambda(
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ExprLambda {
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range: 226..237,
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parameters: Some(
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Parameters {
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range: 233..234,
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posonlyargs: [],
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args: [
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ParameterWithDefault {
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range: 233..234,
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parameter: Parameter {
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range: 233..234,
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name: Identifier {
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id: "x",
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range: 233..234,
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},
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annotation: None,
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},
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default: None,
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},
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],
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vararg: None,
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kwonlyargs: [],
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kwarg: None,
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},
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),
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body: Name(
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ExprName {
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range: 236..237,
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id: "y",
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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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),
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},
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),
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Raise(
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StmtRaise {
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range: 238..258,
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exc: Some(
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Name(
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ExprName {
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range: 244..245,
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id: "x",
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ctx: Load,
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},
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),
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),
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cause: Some(
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Await(
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ExprAwait {
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range: 251..258,
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value: Name(
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ExprName {
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range: 257..258,
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id: "x",
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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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),
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},
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),
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Raise(
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StmtRaise {
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range: 259..288,
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exc: Some(
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Name(
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ExprName {
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range: 265..266,
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id: "x",
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ctx: Load,
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},
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),
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),
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cause: Some(
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If(
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ExprIf {
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range: 272..288,
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test: BooleanLiteral(
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ExprBooleanLiteral {
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range: 277..281,
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value: true,
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},
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),
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body: Name(
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ExprName {
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range: 272..273,
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id: "x",
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ctx: Load,
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},
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),
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orelse: Name(
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ExprName {
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range: 287..288,
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id: "y",
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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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),
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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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