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## Summary Previously, the `name` field was on `Parameter` which required it to be always optional regardless of the parameter kind because a `typing.Callable` signature does not have name for the parameters. This is the case for positional-only parameters. This wasn't enforced at the type level which meant that downstream usages would have to unwrap on `name` even though it's guaranteed to be present. This commit moves the `name` field from `Parameter` to the `ParameterKind` variants and makes it optional only for `ParameterKind::PositionalOnly` variant while required for all other variants. One change that's now required is that a `Callable` form using a gradual form for parameter types (`...`) would have a default `args` and `kwargs` name used for variadic and keyword-variadic parameter kind respectively. This is also the case for invalid `Callable` type forms. I think this is fine as names are not relevant in this context but happy to make it optional even in variadic variants. ## Test Plan No new tests; make sure existing tests are passing. |
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