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Allow passing ParseOptions to inline tests (#16357)

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## Summary

This PR adds support for a pragma-style header for inline parser tests
containing JSON-serialized `ParseOptions`. For example,

```python
# parse_options: { "target-version": "3.9" }
match 2:
    case 1:
        pass
```

The line must start with `# parse_options: ` and then the rest of the
(trimmed) line is deserialized into `ParseOptions` used for parsing the
the test.

## Test Plan

Existing inline tests, plus two new inline tests for
`match-before-py310`.

---------

Co-authored-by: Alex Waygood <alex.waygood@gmail.com>
This commit is contained in:
Brent Westbrook 2025-02-27 10:23:15 -05:00 • committed by GitHub
parent 568cf88c6c
commit 764aa0e6a1
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8 changed files with 238 additions and 7 deletions
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12
crates/ruff_python_parser/src/parser/statement.rs
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@ -2265,6 +2265,18 @@ impl<'src> Parser<'src> {
let cases = self.parse_match_body();
// test_err match_before_py310
// # parse_options: { "target-version": "3.9" }
// match 2:
// case 1:
// pass
// test_ok match_after_py310
// # parse_options: { "target-version": "3.10" }
// match 2:
// case 1:
// pass
if self.options.target_version < PythonVersion::PY310 {
self.unsupported_syntax_errors.push(UnsupportedSyntaxError {
kind: UnsupportedSyntaxErrorKind::MatchBeforePy310,