Re-format let-else per rustfmt update

compiler/rustc_ast_lowering/src/asm.rs

@@ -352,7 +352,8 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
 
                                     let idx2 = *o.get();
                                     let (ref op2, op_sp2) = operands[idx2];
-                                    let Some(asm::InlineAsmRegOrRegClass::Reg(reg2)) = op2.reg() else {
+                                    let Some(asm::InlineAsmRegOrRegClass::Reg(reg2)) = op2.reg()
+                                    else {
                                         unreachable!();
                                     };
 
@@ -368,7 +369,7 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
                                             assert!(!*late);
                                             let out_op_sp = if input { op_sp2 } else { op_sp };
                                             Some(out_op_sp)
-                                        },
+                                        }
                                         _ => None,
                                     };
 
@@ -377,7 +378,7 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
                                         op_span2: op_sp2,
                                         reg1_name: reg.name(),
                                         reg2_name: reg2.name(),
-                                        in_out
+                                        in_out,
                                     });
                                 }
                                 Entry::Vacant(v) => {

compiler/rustc_borrowck/src/diagnostics/conflict_errors.rs

@@ -714,7 +714,9 @@ impl<'cx, 'tcx> MirBorrowckCtxt<'cx, 'tcx> {
             _ => None,
         };
 
-        let Some(borrow_level) = borrow_level else { return false; };
+        let Some(borrow_level) = borrow_level else {
+            return false;
+        };
         let sugg = move_sites
             .iter()
             .map(|move_site| {
@@ -763,7 +765,9 @@ impl<'cx, 'tcx> MirBorrowckCtxt<'cx, 'tcx> {
             .typeck_root_def_id(self.mir_def_id().to_def_id())
             .as_local()
             .and_then(|def_id| tcx.hir().get_generics(def_id))
-        else { return; };
+        else {
+            return;
+        };
         // Try to find predicates on *generic params* that would allow copying `ty`
         let ocx = ObligationCtxt::new(&self.infcx);
         let copy_did = tcx.require_lang_item(LangItem::Copy, Some(span));
@@ -1220,18 +1224,20 @@ impl<'cx, 'tcx> MirBorrowckCtxt<'cx, 'tcx> {
             return;
         };
         let inner_param_uses = find_all_local_uses::find(self.body, inner_param.local);
-        let Some((inner_call_loc, inner_call_term)) = inner_param_uses.into_iter().find_map(|loc| {
-            let Either::Right(term) = self.body.stmt_at(loc) else {
-                debug!("{:?} is a statement, so it can't be a call", loc);
-                return None;
-            };
-            let TerminatorKind::Call { args, .. } = &term.kind else {
-                debug!("not a call: {:?}", term);
-                return None;
-            };
-            debug!("checking call args for uses of inner_param: {:?}", args);
-            args.contains(&Operand::Move(inner_param)).then_some((loc, term))
-        }) else {
+        let Some((inner_call_loc, inner_call_term)) =
+            inner_param_uses.into_iter().find_map(|loc| {
+                let Either::Right(term) = self.body.stmt_at(loc) else {
+                    debug!("{:?} is a statement, so it can't be a call", loc);
+                    return None;
+                };
+                let TerminatorKind::Call { args, .. } = &term.kind else {
+                    debug!("not a call: {:?}", term);
+                    return None;
+                };
+                debug!("checking call args for uses of inner_param: {:?}", args);
+                args.contains(&Operand::Move(inner_param)).then_some((loc, term))
+            })
+        else {
             debug!("no uses of inner_param found as a by-move call arg");
             return;
         };
@@ -1442,21 +1448,24 @@ impl<'cx, 'tcx> MirBorrowckCtxt<'cx, 'tcx> {
         }
 
         // Get closure's arguments
-        let ty::Closure(_, substs) = typeck_results.expr_ty(closure_expr).kind() else { /* hir::Closure can be a generator too */ return };
+        let ty::Closure(_, substs) = typeck_results.expr_ty(closure_expr).kind() else {
+            /* hir::Closure can be a generator too */
+            return;
+        };
         let sig = substs.as_closure().sig();
         let tupled_params =
             tcx.erase_late_bound_regions(sig.inputs().iter().next().unwrap().map_bound(|&b| b));
         let ty::Tuple(params) = tupled_params.kind() else { return };
 
         // Find the first argument with a matching type, get its name
-        let Some((_, this_name)) = params
-            .iter()
-            .zip(hir.body_param_names(closure.body))
-            .find(|(param_ty, name)|{
+        let Some((_, this_name)) =
+            params.iter().zip(hir.body_param_names(closure.body)).find(|(param_ty, name)| {
                 // FIXME: also support deref for stuff like `Rc` arguments
                 param_ty.peel_refs() == local_ty && name != &Ident::empty()
             })
-            else { return };
+        else {
+            return;
+        };
 
         let spans;
         if let Some((_path_expr, qpath)) = finder.error_path
@@ -2899,7 +2908,9 @@ impl<'cx, 'tcx> MirBorrowckCtxt<'cx, 'tcx> {
                         {
                             let def_id = def_id.expect_local();
                             for operand in operands {
-                                let (Operand::Copy(assigned_from) | Operand::Move(assigned_from)) = operand else {
+                                let (Operand::Copy(assigned_from) | Operand::Move(assigned_from)) =
+                                    operand
+                                else {
                                     continue;
                                 };
                                 debug!(
@@ -2908,7 +2919,9 @@ impl<'cx, 'tcx> MirBorrowckCtxt<'cx, 'tcx> {
                                 );
 
                                 // Find the local from the operand.
-                                let Some(assigned_from_local) = assigned_from.local_or_deref_local() else {
+                                let Some(assigned_from_local) =
+                                    assigned_from.local_or_deref_local()
+                                else {
                                     continue;
                                 };
 
@@ -2961,7 +2974,9 @@ impl<'cx, 'tcx> MirBorrowckCtxt<'cx, 'tcx> {
                         );
 
                         // Find the local from the rvalue.
-                        let Some(assigned_from_local) = assigned_from.local_or_deref_local() else { continue };
+                        let Some(assigned_from_local) = assigned_from.local_or_deref_local() else {
+                            continue;
+                        };
                         debug!(
                             "annotate_argument_and_return_for_borrow: \
                              assigned_from_local={:?}",
@@ -3009,7 +3024,8 @@ impl<'cx, 'tcx> MirBorrowckCtxt<'cx, 'tcx> {
                         assigned_to, args
                     );
                     for operand in args {
-                        let (Operand::Copy(assigned_from) | Operand::Move(assigned_from)) = operand else {
+                        let (Operand::Copy(assigned_from) | Operand::Move(assigned_from)) = operand
+                        else {
                             continue;
                         };
                         debug!(

compiler/rustc_borrowck/src/diagnostics/mod.rs

@@ -847,14 +847,12 @@ impl<'cx, 'tcx> MirBorrowckCtxt<'cx, 'tcx> {
             kind: TerminatorKind::Call { fn_span, call_source, .. }, ..
         }) = &self.body[location.block].terminator
         {
-            let Some((method_did, method_substs)) =
-            rustc_middle::util::find_self_call(
-                    self.infcx.tcx,
-                    &self.body,
-                    target_temp,
-                    location.block,
-                )
-            else {
+            let Some((method_did, method_substs)) = rustc_middle::util::find_self_call(
+                self.infcx.tcx,
+                &self.body,
+                target_temp,
+                location.block,
+            ) else {
                 return normal_ret;
             };
 

compiler/rustc_borrowck/src/diagnostics/move_errors.rs

@@ -184,7 +184,9 @@ impl<'a, 'tcx> MirBorrowckCtxt<'a, 'tcx> {
             }
             // Error with the pattern
             LookupResult::Exact(_) => {
-                let LookupResult::Parent(Some(mpi)) = self.move_data.rev_lookup.find(move_from.as_ref()) else {
+                let LookupResult::Parent(Some(mpi)) =
+                    self.move_data.rev_lookup.find(move_from.as_ref())
+                else {
                     // move_from should be a projection from match_place.
                     unreachable!("Probably not unreachable...");
                 };
@@ -494,8 +496,10 @@ impl<'a, 'tcx> MirBorrowckCtxt<'a, 'tcx> {
             if let LocalInfo::User(BindingForm::Var(VarBindingForm { pat_span, .. })) =
                 *bind_to.local_info()
             {
-                let Ok(pat_snippet) =
-                    self.infcx.tcx.sess.source_map().span_to_snippet(pat_span) else { continue; };
+                let Ok(pat_snippet) = self.infcx.tcx.sess.source_map().span_to_snippet(pat_span)
+                else {
+                    continue;
+                };
                 let Some(stripped) = pat_snippet.strip_prefix('&') else {
                     suggestions.push((
                         bind_to.source_info.span.shrink_to_lo(),

compiler/rustc_borrowck/src/diagnostics/mutability_errors.rs

@@ -648,8 +648,12 @@ impl<'a, 'tcx> MirBorrowckCtxt<'a, 'tcx> {
             let def_id = self.body.source.def_id();
             let hir_id = hir_map.local_def_id_to_hir_id(def_id.as_local().unwrap());
             let node = hir_map.find(hir_id);
-            let Some(hir::Node::Item(item)) = node else { return; };
-            let hir::ItemKind::Fn(.., body_id) = item.kind else { return; };
+            let Some(hir::Node::Item(item)) = node else {
+                return;
+            };
+            let hir::ItemKind::Fn(.., body_id) = item.kind else {
+                return;
+            };
             let body = self.infcx.tcx.hir().body(body_id);
 
             let mut v = V { assign_span: span, err, ty, suggested: false };

compiler/rustc_borrowck/src/diagnostics/region_errors.rs

@@ -224,12 +224,10 @@ impl<'a, 'tcx> MirBorrowckCtxt<'a, 'tcx> {
         let mut hrtb_bounds = vec![];
         gat_id_and_generics.iter().flatten().for_each(|(gat_hir_id, generics)| {
             for pred in generics.predicates {
-                let BoundPredicate(
-                        WhereBoundPredicate {
-                            bound_generic_params,
-                            bounds,
-                            ..
-                        }) = pred else { continue; };
+                let BoundPredicate(WhereBoundPredicate { bound_generic_params, bounds, .. }) = pred
+                else {
+                    continue;
+                };
                 if bound_generic_params
                     .iter()
                     .rfind(|bgp| hir.local_def_id_to_hir_id(bgp.def_id) == *gat_hir_id)
@@ -813,7 +811,9 @@ impl<'a, 'tcx> MirBorrowckCtxt<'a, 'tcx> {
                 return;
             }
             let suitable_region = self.infcx.tcx.is_suitable_region(f);
-            let Some(suitable_region) = suitable_region else { return; };
+            let Some(suitable_region) = suitable_region else {
+                return;
+            };
 
             let fn_returns = self.infcx.tcx.return_type_impl_or_dyn_traits(suitable_region.def_id);
 
@@ -848,7 +848,10 @@ impl<'a, 'tcx> MirBorrowckCtxt<'a, 'tcx> {
             let Some((alias_tys, alias_span, lt_addition_span)) = self
                 .infcx
                 .tcx
-                .return_type_impl_or_dyn_traits_with_type_alias(suitable_region.def_id) else { return; };
+                .return_type_impl_or_dyn_traits_with_type_alias(suitable_region.def_id)
+            else {
+                return;
+            };
 
             // in case the return type of the method is a type alias
             let mut spans_suggs: Vec<_> = Vec::new();
@@ -932,8 +935,13 @@ impl<'a, 'tcx> MirBorrowckCtxt<'a, 'tcx> {
         let mut visitor = TraitObjectVisitor(FxIndexSet::default());
         visitor.visit_ty(param.param_ty);
 
-        let Some((ident, self_ty)) =
-            NiceRegionError::get_impl_ident_and_self_ty_from_trait(tcx, instance.def_id(), &visitor.0) else { return; };
+        let Some((ident, self_ty)) = NiceRegionError::get_impl_ident_and_self_ty_from_trait(
+            tcx,
+            instance.def_id(),
+            &visitor.0,
+        ) else {
+            return;
+        };
 
         self.suggest_constrain_dyn_trait_in_impl(diag, &visitor.0, ident, self_ty);
     }
@@ -981,23 +989,25 @@ impl<'a, 'tcx> MirBorrowckCtxt<'a, 'tcx> {
         sup: RegionVid,
     ) {
         let (Some(sub), Some(sup)) = (self.to_error_region(sub), self.to_error_region(sup)) else {
-            return
+            return;
         };
 
         let Some((ty_sub, _)) = self
             .infcx
             .tcx
             .is_suitable_region(sub)
-            .and_then(|anon_reg| find_anon_type(self.infcx.tcx, sub, &anon_reg.boundregion)) else {
-            return
+            .and_then(|anon_reg| find_anon_type(self.infcx.tcx, sub, &anon_reg.boundregion))
+        else {
+            return;
         };
 
         let Some((ty_sup, _)) = self
             .infcx
             .tcx
             .is_suitable_region(sup)
-            .and_then(|anon_reg| find_anon_type(self.infcx.tcx, sup, &anon_reg.boundregion)) else {
-            return
+            .and_then(|anon_reg| find_anon_type(self.infcx.tcx, sup, &anon_reg.boundregion))
+        else {
+            return;
         };
 
         suggest_adding_lifetime_params(self.infcx.tcx, sub, ty_sup, ty_sub, diag);

compiler/rustc_borrowck/src/diagnostics/region_name.rs

@@ -325,8 +325,8 @@ impl<'tcx> MirBorrowckCtxt<'_, 'tcx> {
                         // Can't have BrEnv in functions, constants or generators.
                         bug!("BrEnv outside of closure.");
                     };
-                    let hir::ExprKind::Closure(&hir::Closure { fn_decl_span, .. })
-                        = tcx.hir().expect_expr(self.mir_hir_id()).kind
+                    let hir::ExprKind::Closure(&hir::Closure { fn_decl_span, .. }) =
+                        tcx.hir().expect_expr(self.mir_hir_id()).kind
                     else {
                         bug!("Closure is not defined by a closure expr");
                     };

compiler/rustc_borrowck/src/region_infer/mod.rs

@@ -2058,10 +2058,17 @@ impl<'tcx> RegionInferenceContext<'tcx> {
         let mut extra_info = vec![];
         for constraint in path.iter() {
             let outlived = constraint.sub;
-            let Some(origin) = self.var_infos.get(outlived) else { continue; };
-            let RegionVariableOrigin::Nll(NllRegionVariableOrigin::Placeholder(p)) = origin.origin else { continue; };
+            let Some(origin) = self.var_infos.get(outlived) else {
+                continue;
+            };
+            let RegionVariableOrigin::Nll(NllRegionVariableOrigin::Placeholder(p)) = origin.origin
+            else {
+                continue;
+            };
             debug!(?constraint, ?p);
-            let ConstraintCategory::Predicate(span) = constraint.category else { continue; };
+            let ConstraintCategory::Predicate(span) = constraint.category else {
+                continue;
+            };
             extra_info.push(ExtraConstraintInfo::PlaceholderFromPredicate(span));
             // We only want to point to one
             break;

compiler/rustc_borrowck/src/type_check/mod.rs

@@ -2039,28 +2039,16 @@ impl<'a, 'tcx> TypeChecker<'a, 'tcx> {
                     }
 
                     CastKind::PointerCoercion(PointerCoercion::MutToConstPointer) => {
-                        let ty::RawPtr(ty::TypeAndMut {
-                            ty: ty_from,
-                            mutbl: hir::Mutability::Mut,
-                        }) = op.ty(body, tcx).kind() else {
-                            span_mirbug!(
-                                self,
-                                rvalue,
-                                "unexpected base type for cast {:?}",
-                                ty,
-                            );
+                        let ty::RawPtr(ty::TypeAndMut { ty: ty_from, mutbl: hir::Mutability::Mut }) =
+                            op.ty(body, tcx).kind()
+                        else {
+                            span_mirbug!(self, rvalue, "unexpected base type for cast {:?}", ty,);
                             return;
                         };
-                        let ty::RawPtr(ty::TypeAndMut {
-                            ty: ty_to,
-                            mutbl: hir::Mutability::Not,
-                        }) = ty.kind() else {
-                            span_mirbug!(
-                                self,
-                                rvalue,
-                                "unexpected target type for cast {:?}",
-                                ty,
-                            );
+                        let ty::RawPtr(ty::TypeAndMut { ty: ty_to, mutbl: hir::Mutability::Not }) =
+                            ty.kind()
+                        else {
+                            span_mirbug!(self, rvalue, "unexpected target type for cast {:?}", ty,);
                             return;
                         };
                         if let Err(terr) = self.sub_types(

compiler/rustc_borrowck/src/universal_regions.rs

@@ -929,7 +929,9 @@ fn for_each_late_bound_region_in_item<'tcx>(
     }
 
     for bound_var in tcx.late_bound_vars(tcx.hir().local_def_id_to_hir_id(mir_def_id)) {
-        let ty::BoundVariableKind::Region(bound_region) = bound_var else { continue; };
+        let ty::BoundVariableKind::Region(bound_region) = bound_var else {
+            continue;
+        };
         let liberated_region = ty::Region::new_free(tcx, mir_def_id.to_def_id(), bound_region);
         f(liberated_region);
     }

compiler/rustc_builtin_macros/src/asm.rs

@@ -157,8 +157,7 @@ pub fn parse_asm_args<'a>(
         } else if p.eat_keyword(sym::sym) {
             let expr = p.parse_expr()?;
             let ast::ExprKind::Path(qself, path) = &expr.kind else {
-                let err = diag
-                    .create_err(errors::AsmSymNoPath { span: expr.span });
+                let err = diag.create_err(errors::AsmSymNoPath { span: expr.span });
                 return Err(err);
             };
             let sym = ast::InlineAsmSym {