Nits

compiler/rustc_borrowck/src/diagnostics/conflict_errors.rs

@@ -4195,7 +4195,7 @@ impl<'infcx, 'tcx> MirBorrowckCtxt<'_, 'infcx, 'tcx> {
         let return_ty = sig.output();
         match return_ty.skip_binder().kind() {
             ty::Ref(return_region, _, _)
-                if return_region.has_name(self.infcx.tcx) && !is_closure =>
+                if return_region.is_named(self.infcx.tcx) && !is_closure =>
             {
                 // This is case 1 from above, return type is a named reference so we need to
                 // search for relevant arguments.

compiler/rustc_borrowck/src/diagnostics/region_errors.rs

@@ -853,7 +853,7 @@ impl<'infcx, 'tcx> MirBorrowckCtxt<'_, 'infcx, 'tcx> {
             };
 
             let lifetime =
-                if f.has_name(self.infcx.tcx) { fr_name.name } else { kw::UnderscoreLifetime };
+                if f.is_named(self.infcx.tcx) { fr_name.name } else { kw::UnderscoreLifetime };
 
             let arg = match param.param.pat.simple_ident() {
                 Some(simple_ident) => format!("argument `{simple_ident}`"),

compiler/rustc_hir_analysis/src/check/wfcheck.rs

@@ -2338,7 +2338,7 @@ fn lint_redundant_lifetimes<'tcx>(
             lifetimes.push(ty::Region::new_late_param(tcx, owner_id.to_def_id(), kind));
         }
     }
-    lifetimes.retain(|candidate| candidate.has_name(tcx));
+    lifetimes.retain(|candidate| candidate.is_named(tcx));
 
     // Keep track of lifetimes which have already been replaced with other lifetimes.
     // This makes sure that if `'a = 'b = 'c`, we don't say `'c` should be replaced by

compiler/rustc_hir_analysis/src/collect.rs

@@ -578,9 +578,7 @@ fn get_new_lifetime_name<'tcx>(
     let existing_lifetimes = tcx
         .collect_referenced_late_bound_regions(poly_trait_ref)
         .into_iter()
-        .filter_map(|lt| {
+        .filter_map(|lt| lt.get_name(tcx).map(|name| name.as_str().to_string()))
-            if let Some(name) = lt.get_name(tcx) { Some(name.as_str().to_string()) } else { None }
-        })
         .chain(generics.params.iter().filter_map(|param| {
             if let hir::GenericParamKind::Lifetime { .. } = &param.kind {
                 Some(param.name.ident().as_str().to_string())

compiler/rustc_hir_analysis/src/hir_ty_lowering/bounds.rs

@@ -12,7 +12,7 @@ use rustc_middle::ty::{
     self as ty, IsSuggestable, Ty, TyCtxt, TypeSuperVisitable, TypeVisitable, TypeVisitableExt,
     TypeVisitor, Upcast,
 };
-use rustc_span::{ErrorGuaranteed, Ident, Span, kw};
+use rustc_span::{ErrorGuaranteed, Ident, Span, kw, sym};
 use rustc_trait_selection::traits;
 use smallvec::SmallVec;
 use tracing::{debug, instrument};

compiler/rustc_middle/src/ty/region.rs

@@ -182,7 +182,7 @@ impl<'tcx> Region<'tcx> {
     }
 
     /// Is this region named by the user?
-    pub fn has_name(self, tcx: TyCtxt<'tcx>) -> bool {
+    pub fn is_named(self, tcx: TyCtxt<'tcx>) -> bool {
         match self.kind() {
             ty::ReEarlyParam(ebr) => ebr.is_named(),
             ty::ReBound(_, br) => br.kind.is_named(tcx),

compiler/rustc_trait_selection/src/error_reporting/infer/nice_region_error/named_anon_conflict.rs

@@ -25,12 +25,12 @@ impl<'a, 'tcx> NiceRegionError<'a, 'tcx> {
         // only introduced anonymous regions in parameters) as well as a
         // version new_ty of its type where the anonymous region is replaced
         // with the named one.
-        let (named, anon, anon_param_info, region_info) = if sub.has_name(self.tcx())
+        let (named, anon, anon_param_info, region_info) = if sub.is_named(self.tcx())
             && let Some(region_info) = self.tcx().is_suitable_region(self.generic_param_scope, sup)
             && let Some(anon_param_info) = self.find_param_with_region(sup, sub)
         {
             (sub, sup, anon_param_info, region_info)
-        } else if sup.has_name(self.tcx())
+        } else if sup.is_named(self.tcx())
             && let Some(region_info) = self.tcx().is_suitable_region(self.generic_param_scope, sub)
             && let Some(anon_param_info) = self.find_param_with_region(sub, sup)
         {
@@ -56,9 +56,7 @@ impl<'a, 'tcx> NiceRegionError<'a, 'tcx> {
         let scope_def_id = region_info.scope;
         let is_impl_item = region_info.is_impl_item;
 
-        if !anon_param_info.kind.is_named(self.tcx()) {
+        if anon_param_info.kind.is_named(self.tcx()) {
-            // Anon region
-        } else {
             /* not an anonymous region */
             debug!("try_report_named_anon_conflict: not an anonymous region");
             return None;

compiler/rustc_trait_selection/src/error_reporting/infer/nice_region_error/placeholder_error.rs

@@ -164,7 +164,7 @@ impl<'tcx> NiceRegionError<'_, 'tcx> {
                 sub_region @ Region(Interned(RePlaceholder(_), _)),
                 sup_region,
             )) => self.try_report_trait_placeholder_mismatch(
-                (!sup_region.has_name(self.tcx())).then_some(*sup_region),
+                (!sup_region.is_named(self.tcx())).then_some(*sup_region),
                 cause,
                 Some(*sub_region),
                 None,
@@ -176,7 +176,7 @@ impl<'tcx> NiceRegionError<'_, 'tcx> {
                 sub_region,
                 sup_region @ Region(Interned(RePlaceholder(_), _)),
             )) => self.try_report_trait_placeholder_mismatch(
-                (!sub_region.has_name(self.tcx())).then_some(*sub_region),
+                (!sub_region.is_named(self.tcx())).then_some(*sub_region),
                 cause,
                 None,
                 Some(*sup_region),

compiler/rustc_trait_selection/src/error_reporting/infer/nice_region_error/static_impl_trait.rs

@@ -46,7 +46,7 @@ impl<'a, 'tcx> NiceRegionError<'a, 'tcx> {
         let param = self.find_param_with_region(*sup_r, *sub_r)?;
         let simple_ident = param.param.pat.simple_ident();
         let lifetime_name =
-            if sup_r.has_name(self.tcx()) { sup_r.to_string() } else { "'_".to_owned() };
+            if sup_r.is_named(self.tcx()) { sup_r.to_string() } else { "'_".to_owned() };
 
         let (mention_influencer, influencer_point) =
             if sup_origin.span().overlaps(param.param_ty_span) {
@@ -100,7 +100,7 @@ impl<'a, 'tcx> NiceRegionError<'a, 'tcx> {
             // We don't need a note, it's already at the end, it can be shown as a `span_label`.
             require_span_as_label: (!require_as_note).then_some(require_span),
 
-            has_lifetime: sup_r.has_name(self.tcx()),
+            has_lifetime: sup_r.is_named(self.tcx()),
             lifetime: lifetime_name.clone(),
             has_param_name: simple_ident.is_some(),
             param_name: simple_ident.map(|x| x.to_string()).unwrap_or_default(),

compiler/rustc_trait_selection/src/error_reporting/infer/nice_region_error/trait_impl_difference.rs

@@ -76,7 +76,7 @@ impl<'a, 'tcx> NiceRegionError<'a, 'tcx> {
 
         impl<'tcx> ty::TypeVisitor<TyCtxt<'tcx>> for HighlightBuilder<'tcx> {
             fn visit_region(&mut self, r: ty::Region<'tcx>) {
-                if !r.has_name(self.tcx) && self.counter <= 3 {
+                if !r.is_named(self.tcx) && self.counter <= 3 {
                     self.highlight.highlighting_region(r, self.counter);
                     self.counter += 1;
                 }

compiler/rustc_trait_selection/src/error_reporting/infer/region.rs

@@ -729,7 +729,7 @@ impl<'a, 'tcx> TypeErrCtxt<'a, 'tcx> {
             .dcx()
             .struct_span_err(span, format!("{labeled_user_string} may not live long enough"));
         err.code(match sub.kind() {
-            ty::ReEarlyParam(_) | ty::ReLateParam(_) if sub.has_name(self.tcx) => E0309,
+            ty::ReEarlyParam(_) | ty::ReLateParam(_) if sub.is_named(self.tcx) => E0309,
             ty::ReStatic => E0310,
             _ => E0311,
         });
@@ -877,7 +877,7 @@ impl<'a, 'tcx> TypeErrCtxt<'a, 'tcx> {
 
         let (lifetime_def_id, lifetime_scope) =
             match self.tcx.is_suitable_region(generic_param_scope, lifetime) {
-                Some(info) if !lifetime.has_name(self.tcx) => {
+                Some(info) if !lifetime.is_named(self.tcx) => {
                     (info.region_def_id.expect_local(), info.scope)
                 }
                 _ => return lifetime.get_name_or_anon(self.tcx).to_string(),