mirror of
https://github.com/astral-sh/ruff.git
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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>
673 lines
28 KiB
Text
673 lines
28 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/if.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..375,
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body: [
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If(
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StmtIf {
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range: 0..28,
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test: NumberLiteral(
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ExprNumberLiteral {
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range: 3..4,
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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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body: [
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Expr(
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StmtExpr {
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range: 6..8,
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value: NumberLiteral(
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ExprNumberLiteral {
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range: 6..8,
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value: Int(
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10,
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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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elif_else_clauses: [
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ElifElseClause {
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range: 9..19,
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test: Some(
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NumberLiteral(
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ExprNumberLiteral {
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range: 14..15,
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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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body: [
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Expr(
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StmtExpr {
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range: 17..19,
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value: NumberLiteral(
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ExprNumberLiteral {
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range: 17..19,
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value: Int(
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20,
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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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ElifElseClause {
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range: 20..28,
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test: None,
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body: [
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Expr(
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StmtExpr {
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range: 26..28,
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value: NumberLiteral(
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ExprNumberLiteral {
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range: 26..28,
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value: Int(
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30,
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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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If(
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StmtIf {
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range: 30..52,
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test: BooleanLiteral(
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ExprBooleanLiteral {
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range: 33..37,
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value: true,
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},
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),
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body: [
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Expr(
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StmtExpr {
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range: 43..44,
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value: NumberLiteral(
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ExprNumberLiteral {
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range: 43..44,
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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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},
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),
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Expr(
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StmtExpr {
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range: 49..52,
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value: EllipsisLiteral(
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ExprEllipsisLiteral {
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range: 49..52,
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},
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),
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},
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),
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],
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elif_else_clauses: [],
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},
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),
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If(
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StmtIf {
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range: 53..85,
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test: Compare(
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ExprCompare {
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range: 56..61,
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left: Name(
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ExprName {
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range: 56..57,
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id: "x",
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ctx: Load,
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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: 60..61,
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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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],
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},
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),
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body: [
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Expr(
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StmtExpr {
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range: 67..70,
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value: EllipsisLiteral(
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ExprEllipsisLiteral {
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range: 67..70,
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},
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),
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},
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),
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],
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elif_else_clauses: [
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ElifElseClause {
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range: 71..85,
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test: None,
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body: [
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Pass(
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StmtPass {
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range: 81..85,
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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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If(
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StmtIf {
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range: 87..117,
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test: Name(
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ExprName {
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range: 90..91,
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id: "a",
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ctx: Load,
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},
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),
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body: [
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Pass(
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StmtPass {
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range: 97..101,
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},
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),
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],
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elif_else_clauses: [
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ElifElseClause {
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range: 102..117,
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test: Some(
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Name(
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ExprName {
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range: 107..108,
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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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body: [
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Expr(
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StmtExpr {
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range: 114..117,
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value: EllipsisLiteral(
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ExprEllipsisLiteral {
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range: 114..117,
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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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If(
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StmtIf {
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range: 119..203,
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test: BoolOp(
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ExprBoolOp {
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range: 122..129,
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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: 122..123,
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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: 128..129,
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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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body: [
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Expr(
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StmtExpr {
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range: 135..138,
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value: EllipsisLiteral(
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ExprEllipsisLiteral {
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range: 135..138,
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},
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),
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},
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),
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],
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elif_else_clauses: [
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ElifElseClause {
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range: 139..157,
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test: Some(
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BooleanLiteral(
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ExprBooleanLiteral {
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range: 144..148,
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value: true,
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},
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),
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),
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body: [
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Expr(
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StmtExpr {
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range: 154..157,
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value: EllipsisLiteral(
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ExprEllipsisLiteral {
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range: 154..157,
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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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ElifElseClause {
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range: 158..173,
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test: Some(
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Name(
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ExprName {
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range: 163..164,
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id: "c",
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ctx: Load,
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},
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),
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),
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body: [
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Expr(
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StmtExpr {
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range: 170..173,
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value: EllipsisLiteral(
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ExprEllipsisLiteral {
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range: 170..173,
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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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ElifElseClause {
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range: 174..189,
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test: Some(
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Name(
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ExprName {
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range: 179..180,
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id: "d",
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ctx: Load,
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},
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),
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),
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body: [
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Expr(
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StmtExpr {
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range: 186..189,
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value: EllipsisLiteral(
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ExprEllipsisLiteral {
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range: 186..189,
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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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ElifElseClause {
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range: 190..203,
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test: None,
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body: [
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Expr(
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StmtExpr {
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range: 200..203,
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value: Call(
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ExprCall {
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range: 200..203,
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func: Name(
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ExprName {
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range: 200..201,
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id: "f",
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ctx: Load,
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},
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),
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arguments: Arguments {
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range: 201..203,
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args: [],
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keywords: [],
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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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If(
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StmtIf {
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range: 229..260,
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test: Named(
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ExprNamed {
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range: 232..238,
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target: Name(
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ExprName {
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range: 232..233,
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id: "a",
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ctx: Store,
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},
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),
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value: Name(
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ExprName {
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range: 237..238,
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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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body: [
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Expr(
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StmtExpr {
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range: 240..243,
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value: EllipsisLiteral(
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ExprEllipsisLiteral {
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range: 240..243,
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},
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),
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},
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),
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],
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elif_else_clauses: [
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ElifElseClause {
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range: 244..260,
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test: Some(
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Named(
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ExprNamed {
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range: 249..255,
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target: Name(
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ExprName {
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range: 249..250,
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id: "a",
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ctx: Store,
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},
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),
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value: Name(
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ExprName {
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range: 254..255,
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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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body: [
|
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Expr(
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StmtExpr {
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range: 257..260,
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value: EllipsisLiteral(
|
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ExprEllipsisLiteral {
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range: 257..260,
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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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If(
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StmtIf {
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range: 261..302,
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test: Lambda(
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ExprLambda {
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range: 264..275,
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parameters: Some(
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Parameters {
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range: 271..272,
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posonlyargs: [],
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args: [
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ParameterWithDefault {
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range: 271..272,
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parameter: Parameter {
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range: 271..272,
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name: Identifier {
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id: "x",
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range: 271..272,
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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: 274..275,
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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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body: [
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Expr(
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StmtExpr {
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range: 277..280,
|
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value: EllipsisLiteral(
|
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ExprEllipsisLiteral {
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range: 277..280,
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},
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),
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},
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),
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],
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elif_else_clauses: [
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ElifElseClause {
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range: 281..302,
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test: Some(
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Lambda(
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ExprLambda {
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range: 286..297,
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parameters: Some(
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Parameters {
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range: 293..294,
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posonlyargs: [],
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args: [
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ParameterWithDefault {
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range: 293..294,
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parameter: Parameter {
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range: 293..294,
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name: Identifier {
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id: "x",
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range: 293..294,
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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: 296..297,
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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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body: [
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Expr(
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StmtExpr {
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range: 299..302,
|
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value: EllipsisLiteral(
|
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ExprEllipsisLiteral {
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range: 299..302,
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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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),
|
|
If(
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StmtIf {
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range: 303..336,
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test: Await(
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ExprAwait {
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range: 306..313,
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value: Name(
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ExprName {
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range: 312..313,
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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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body: [
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Expr(
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|
StmtExpr {
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range: 315..318,
|
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value: EllipsisLiteral(
|
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ExprEllipsisLiteral {
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range: 315..318,
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},
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),
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},
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),
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],
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elif_else_clauses: [
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ElifElseClause {
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range: 319..336,
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test: Some(
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Await(
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ExprAwait {
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range: 324..331,
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value: Name(
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ExprName {
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range: 330..331,
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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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body: [
|
|
Expr(
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|
StmtExpr {
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range: 333..336,
|
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value: EllipsisLiteral(
|
|
ExprEllipsisLiteral {
|
|
range: 333..336,
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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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),
|
|
If(
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|
StmtIf {
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range: 337..374,
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test: Yield(
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|
ExprYield {
|
|
range: 341..348,
|
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value: Some(
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Name(
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ExprName {
|
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range: 347..348,
|
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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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),
|
|
body: [
|
|
Expr(
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|
StmtExpr {
|
|
range: 351..354,
|
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value: EllipsisLiteral(
|
|
ExprEllipsisLiteral {
|
|
range: 351..354,
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},
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),
|
|
},
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),
|
|
],
|
|
elif_else_clauses: [
|
|
ElifElseClause {
|
|
range: 355..374,
|
|
test: Some(
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|
Yield(
|
|
ExprYield {
|
|
range: 361..368,
|
|
value: Some(
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|
Name(
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|
ExprName {
|
|
range: 367..368,
|
|
id: "x",
|
|
ctx: Load,
|
|
},
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|
),
|
|
),
|
|
},
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|
),
|
|
),
|
|
body: [
|
|
Expr(
|
|
StmtExpr {
|
|
range: 371..374,
|
|
value: EllipsisLiteral(
|
|
ExprEllipsisLiteral {
|
|
range: 371..374,
|
|
},
|
|
),
|
|
},
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),
|
|
],
|
|
},
|
|
],
|
|
},
|
|
),
|
|
],
|
|
},
|
|
)
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|
```
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