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Rename HIR `TypeBinding` to `AssocItemConstraint` and related cleanup Rename `hir::TypeBinding` and `ast::AssocConstraint` to `AssocItemConstraint` and update all items and locals using the old terminology. Motivation: The terminology *type binding* is extremely outdated. "Type bindings" not only include constraints on associated *types* but also on associated *constants* (feature `associated_const_equality`) and on RPITITs of associated *functions* (feature `return_type_notation`). Hence the word *item* in the new name. Furthermore, the word *binding* commonly refers to a mapping from a binder/identifier to a "value" for some definition of "value". Its use in "type binding" made sense when equality constraints (e.g., `AssocTy = Ty`) were the only kind of associated item constraint. Nowadays however, we also have *associated type bounds* (e.g., `AssocTy: Bound`) for which the term *binding* doesn't make sense. --- Old terminology (HIR, rustdoc): ``` `TypeBinding`: (associated) type binding ├── `Constraint`: associated type bound └── `Equality`: (associated) equality constraint (?) ├── `Ty`: (associated) type binding └── `Const`: associated const equality (constraint) ``` Old terminology (AST, abbrev.): ``` `AssocConstraint` ├── `Bound` └── `Equality` ├── `Ty` └── `Const` ``` New terminology (AST, HIR, rustdoc): ``` `AssocItemConstraint`: associated item constraint ├── `Bound`: associated type bound └── `Equality`: associated item equality constraint OR associated item binding (for short) ├── `Ty`: associated type equality constraint OR associated type binding (for short) └── `Const`: associated const equality constraint OR associated const binding (for short) ``` r? compiler-errors |
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