Auto merge of #132580 - compiler-errors:globs, r=Noratrieb

Remove unnecessary pub enum glob-imports from `rustc_middle::ty`

We used to have an idiom in the compiler where we'd prefix or suffix all the variants of an enum, for example `BoundRegionKind`, with something like `Br`, and then *glob-import* that enum variant directly.

`@noratrieb` brought this up, and I think that it's easier to read when we just use the normal style `EnumName::Variant`.

This PR is a bit large, but it's just naming.

The only somewhat opinionated change that this PR does is rename `BorrowKind::Imm` to `BorrowKind::Immutable` and same for the other variants. I think these enums are used sparingly enough that the extra length is fine.

r? `@noratrieb` or reassign

clippy_lints/src/loops/mut_range_bound.rs

@@ -80,7 +80,7 @@ impl<'tcx> Delegate<'tcx> for MutatePairDelegate<'_, 'tcx> {
     fn consume(&mut self, _: &PlaceWithHirId<'tcx>, _: HirId) {}
 
     fn borrow(&mut self, cmt: &PlaceWithHirId<'tcx>, diag_expr_id: HirId, bk: ty::BorrowKind) {
-        if bk == ty::BorrowKind::MutBorrow {
+        if bk == ty::BorrowKind::Mutable {
             if let PlaceBase::Local(id) = cmt.place.base {
                 if Some(id) == self.hir_id_low && !BreakAfterExprVisitor::is_found(self.cx, diag_expr_id) {
                     self.span_low = Some(self.cx.tcx.hir().span(diag_expr_id));

clippy_lints/src/missing_inline.rs

@@ -2,6 +2,7 @@ use clippy_utils::diagnostics::span_lint;
 use rustc_ast::ast;
 use rustc_hir as hir;
 use rustc_lint::{LateContext, LateLintPass, LintContext};
+use rustc_middle::ty::AssocItemContainer;
 use rustc_session::declare_lint_pass;
 use rustc_span::{Span, sym};
 
@@ -138,7 +139,6 @@ impl<'tcx> LateLintPass<'tcx> for MissingInline {
     }
 
     fn check_impl_item(&mut self, cx: &LateContext<'tcx>, impl_item: &'tcx hir::ImplItem<'_>) {
-        use rustc_middle::ty::{ImplContainer, TraitContainer};
         if rustc_middle::lint::in_external_macro(cx.sess(), impl_item.span) || is_executable_or_proc_macro(cx) {
             return;
         }
@@ -156,8 +156,8 @@ impl<'tcx> LateLintPass<'tcx> for MissingInline {
         let assoc_item = cx.tcx.associated_item(impl_item.owner_id);
         let container_id = assoc_item.container_id(cx.tcx);
         let trait_def_id = match assoc_item.container {
-            TraitContainer => Some(container_id),
-            ImplContainer => cx.tcx.impl_trait_ref(container_id).map(|t| t.skip_binder().def_id),
+            AssocItemContainer::Trait => Some(container_id),
+            AssocItemContainer::Impl => cx.tcx.impl_trait_ref(container_id).map(|t| t.skip_binder().def_id),
         };
 
         if let Some(trait_def_id) = trait_def_id {

clippy_lints/src/needless_pass_by_ref_mut.rs

@@ -417,16 +417,16 @@ impl<'tcx> euv::Delegate<'tcx> for MutablyUsedVariablesCtxt<'tcx> {
             // a closure, it'll return this variant whereas if you have just an index access, it'll
             // return `ImmBorrow`. So if there is "Unique" and it's a mutable reference, we add it
             // to the mutably used variables set.
-            if borrow == ty::BorrowKind::MutBorrow
-                || (borrow == ty::BorrowKind::UniqueImmBorrow && base_ty.ref_mutability() == Some(Mutability::Mut))
+            if borrow == ty::BorrowKind::Mutable
+                || (borrow == ty::BorrowKind::UniqueImmutable && base_ty.ref_mutability() == Some(Mutability::Mut))
             {
                 self.add_mutably_used_var(*vid);
             } else if self.is_in_unsafe_block(id) {
                 // If we are in an unsafe block, any operation on this variable must not be warned
                 // upon!
                 self.add_mutably_used_var(*vid);
             }
-        } else if borrow == ty::ImmBorrow {
+        } else if borrow == ty::BorrowKind::Immutable {
             // If there is an `async block`, it'll contain a call to a closure which we need to
             // go into to ensure all "mutate" checks are found.
             if let Node::Expr(Expr {

clippy_lints/src/operators/assign_op_pattern.rs

@@ -102,7 +102,7 @@ fn imm_borrows_in_expr(cx: &LateContext<'_>, e: &hir::Expr<'_>) -> HirIdSet {
     struct S(HirIdSet);
     impl Delegate<'_> for S {
         fn borrow(&mut self, place: &PlaceWithHirId<'_>, _: HirId, kind: BorrowKind) {
-            if matches!(kind, BorrowKind::ImmBorrow | BorrowKind::UniqueImmBorrow) {
+            if matches!(kind, BorrowKind::Immutable | BorrowKind::UniqueImmutable) {
                 self.0.insert(match place.place.base {
                     PlaceBase::Local(id) => id,
                     PlaceBase::Upvar(id) => id.var_path.hir_id,
@@ -127,7 +127,7 @@ fn mut_borrows_in_expr(cx: &LateContext<'_>, e: &hir::Expr<'_>) -> HirIdSet {
     struct S(HirIdSet);
     impl Delegate<'_> for S {
         fn borrow(&mut self, place: &PlaceWithHirId<'_>, _: HirId, kind: BorrowKind) {
-            if matches!(kind, BorrowKind::MutBorrow) {
+            if matches!(kind, BorrowKind::Mutable) {
                 self.0.insert(match place.place.base {
                     PlaceBase::Local(id) => id,
                     PlaceBase::Upvar(id) => id.var_path.hir_id,

clippy_lints/src/unwrap.rs

@@ -217,7 +217,7 @@ fn is_option_as_mut_use(tcx: TyCtxt<'_>, expr_id: HirId) -> bool {
 
 impl<'tcx> Delegate<'tcx> for MutationVisitor<'tcx> {
     fn borrow(&mut self, cat: &PlaceWithHirId<'tcx>, diag_expr_id: HirId, bk: ty::BorrowKind) {
-        if let ty::BorrowKind::MutBorrow = bk
+        if let ty::BorrowKind::Mutable = bk
             && is_potentially_local_place(self.local_id, &cat.place)
             && !is_option_as_mut_use(self.tcx, diag_expr_id)
         {

clippy_utils/src/lib.rs

@@ -1209,8 +1209,8 @@ pub fn can_move_expr_to_closure<'tcx>(cx: &LateContext<'tcx>, expr: &'tcx Expr<'
                             let capture = match capture.info.capture_kind {
                                 UpvarCapture::ByValue => CaptureKind::Value,
                                 UpvarCapture::ByRef(kind) => match kind {
-                                    BorrowKind::ImmBorrow => CaptureKind::Ref(Mutability::Not),
-                                    BorrowKind::UniqueImmBorrow | BorrowKind::MutBorrow => {
+                                    BorrowKind::Immutable => CaptureKind::Ref(Mutability::Not),
+                                    BorrowKind::UniqueImmutable | BorrowKind::Mutable => {
                                         CaptureKind::Ref(Mutability::Mut)
                                     },
                                 },
@@ -3340,8 +3340,8 @@ pub fn get_path_from_caller_to_method_type<'tcx>(
     let assoc_item = tcx.associated_item(method);
     let def_id = assoc_item.container_id(tcx);
     match assoc_item.container {
-        rustc_ty::TraitContainer => get_path_to_callee(tcx, from, def_id),
-        rustc_ty::ImplContainer => {
+        rustc_ty::AssocItemContainer::Trait => get_path_to_callee(tcx, from, def_id),
+        rustc_ty::AssocItemContainer::Impl => {
             let ty = tcx.type_of(def_id).instantiate_identity();
             get_path_to_ty(tcx, from, ty, args)
         },

clippy_utils/src/usage.rs

@@ -67,7 +67,7 @@ impl<'tcx> Delegate<'tcx> for MutVarsDelegate {
     fn consume(&mut self, _: &PlaceWithHirId<'tcx>, _: HirId) {}
 
     fn borrow(&mut self, cmt: &PlaceWithHirId<'tcx>, _: HirId, bk: ty::BorrowKind) {
-        if bk == ty::BorrowKind::MutBorrow {
+        if bk == ty::BorrowKind::Mutable {
             self.update(cmt);
         }
     }