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`BindingAnnotation` refactor * `ast::BindingMode` is deleted and replaced with `hir::BindingAnnotation` (which is moved to `ast`) * `BindingAnnotation` is changed from an enum to a tuple struct e.g. `BindingAnnotation(ByRef::No, Mutability::Mut)` * Associated constants added for convenience `BindingAnnotation::{NONE, REF, MUT, REF_MUT}` One goal is to make it more clear that `BindingAnnotation` merely represents syntax `ref mut` and not the actual binding mode. This was especially confusing since we had `ast::BindingMode`->`hir::BindingAnnotation`->`thir::BindingMode`. I wish there were more symmetry between `ByRef` and `Mutability` (variant) naming (maybe `Mutable::Yes`?), and I also don't love how long the name `BindingAnnotation` is, but this seems like the best compromise. Ideas welcome. |
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