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## Summary This PR extends version-related syntax error detection to red-knot. The main changes here are: 1. Passing `ParseOptions` specifying a `PythonVersion` to parser calls 2. Adding a `python_version` method to the `Db` trait to make this possible 3. Converting `UnsupportedSyntaxError`s to `Diagnostic`s 4. Updating existing mdtests to avoid unrelated syntax errors My initial draft of (1) and (2) in #16090 instead tried passing a `PythonVersion` down to every parser call, but @MichaReiser suggested the `Db` approach instead [here](https://github.com/astral-sh/ruff/pull/16090#discussion_r1969198407), and I think it turned out much nicer. All of the new `python_version` methods look like this: ```rust fn python_version(&self) -> ruff_python_ast::PythonVersion { Program::get(self).python_version(self) } ``` with the exception of the `TestDb` in `ruff_db`, which hard-codes `PythonVersion::latest()`. ## Test Plan Existing mdtests, plus a new mdtest to see at least one of the new diagnostics. |
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