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## Summary https://github.com/astral-sh/ty/issues/214 will require a couple invasive changes that I would like to get merged even before garbage collection is fully implemented (to avoid rebasing): - `ParsedModule` can no longer be dereferenced directly. Instead you need to load a `ParsedModuleRef` to access the AST, which requires a reference to the salsa database (as it may require re-parsing the AST if it was collected). - `AstNodeRef` can only be dereferenced with the `node` method, which takes a reference to the `ParsedModuleRef`. This allows us to encode the fact that ASTs do not live as long as the database and may be collected as soon a given instance of a `ParsedModuleRef` is dropped. There are a number of places where we currently merge the `'db` and `'ast` lifetimes, so this requires giving some types/functions two separate lifetime parameters. |
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