attribute cleanup: rustc_confusables

compiler/rustc_attr_parsing/src/attributes/confusables.rs

@@ -44,9 +44,6 @@ fn finalize(self, _cx: &FinalizeContext<'_, '_, S>) -> Option<AttributeKind> {
             return None;
         }
 
-        Some(AttributeKind::RustcConfusables {
-            symbols: self.confusables,
-            first_span: self.first_span.unwrap(),
-        })
+        Some(AttributeKind::RustcConfusables { confusables: self.confusables })
     }
 }

compiler/rustc_hir/src/attrs/data_structures.rs

@@ -1331,9 +1331,7 @@ pub enum AttributeKind {
 
     /// Represents `#[rustc_confusables]`.
     RustcConfusables {
-        symbols: ThinVec<Symbol>,
-        // FIXME(jdonszelmann): remove when target validation code is moved
-        first_span: Span,
+        confusables: ThinVec<Symbol>,
     },
     /// Represents `#[rustc_const_stable]` and `#[rustc_const_unstable]`.
     RustcConstStability {

compiler/rustc_hir_typeck/src/method/probe.rs

@@ -26,7 +26,7 @@
 use rustc_span::edit_distance::{
     edit_distance_with_substrings, find_best_match_for_name_with_substrings,
 };
-use rustc_span::{DUMMY_SP, Ident, Span, Symbol, sym};
+use rustc_span::{DUMMY_SP, Ident, Span, Symbol};
 use rustc_trait_selection::error_reporting::infer::need_type_info::TypeAnnotationNeeded;
 use rustc_trait_selection::infer::InferCtxtExt as _;
 use rustc_trait_selection::solve::Goal;
@@ -2591,38 +2591,25 @@ fn is_relevant_kind_for_mode(&self, kind: ty::AssocKind) -> bool {
     }
 
     /// Determine if the associated item with the given DefId matches
-    /// the desired name via a doc alias.
+    /// the desired name via a doc alias or rustc_confusables
     fn matches_by_doc_alias(&self, def_id: DefId) -> bool {
         let Some(method) = self.method_name else {
             return false;
         };
-        let Some(local_def_id) = def_id.as_local() else {
-            return false;
-        };
-        let hir_id = self.fcx.tcx.local_def_id_to_hir_id(local_def_id);
-        let attrs = self.fcx.tcx.hir_attrs(hir_id);
 
-        if let Some(d) = find_attr!(attrs, Doc(d) => d)
+        if let Some(d) = find_attr!(self.tcx, def_id, Doc(d) => d)
             && d.aliases.contains_key(&method.name)
         {
             return true;
         }
 
-        for attr in attrs {
-            if attr.has_name(sym::rustc_confusables) {
-                let Some(confusables) = attr.meta_item_list() else {
-                    continue;
-                };
-                // #[rustc_confusables("foo", "bar"))]
-                for n in confusables {
-                    if let Some(lit) = n.lit()
-                        && method.name == lit.symbol
-                    {
-                        return true;
-                    }
-                }
-            }
+        if let Some(confusables) =
+            find_attr!(self.tcx, def_id, RustcConfusables{ confusables } => confusables)
+            && confusables.contains(&method.name)
+        {
+            return true;
         }
+
         false
     }
 

compiler/rustc_hir_typeck/src/method/suggest.rs

@@ -2276,8 +2276,8 @@ pub(crate) fn confusable_method_name(
                 for inherent_method in
                     self.tcx.associated_items(inherent_impl_did).in_definition_order()
                 {
-                    if let Some(candidates) = find_attr!(self.tcx, inherent_method.def_id, RustcConfusables{symbols, ..} => symbols)
-                        && candidates.contains(&item_name.name)
+                    if let Some(confusables) = find_attr!(self.tcx, inherent_method.def_id, RustcConfusables{confusables} => confusables)
+                        && confusables.contains(&item_name.name)
                         && inherent_method.is_fn()
                     {
                         let args =

tests/ui/attributes/rustc_confusables.stderr

@@ -51,7 +51,7 @@ error[E0599]: no method named `push` found for struct `rustc_confusables_across_
   --> $DIR/rustc_confusables.rs:17:7
    |
 LL |     x.push();
-   |       ^^^^ method not found in `rustc_confusables_across_crate::BTreeSet`
+   |       ^^^^
    |
 help: you might have meant to use `insert`
    |

tests/ui/attributes/rustc_confusables_assoc_fn.stderr

@@ -20,7 +20,7 @@ LL | struct S;
    | -------- method `baz` not found for this struct
 ...
 LL |     s.baz(10);
-   |       ^^^ method not found in `S`
+   |       ^^^
    |
 help: you might have meant to use `qux`
    |

tests/ui/attributes/rustc_confusables_std_cases.stderr

@@ -2,7 +2,7 @@ error[E0599]: no method named `push` found for struct `BTreeSet<T, A>` in the cu
   --> $DIR/rustc_confusables_std_cases.rs:6:7
    |
 LL |     x.push(1);
-   |       ^^^^ method not found in `BTreeSet<_>`
+   |       ^^^^
    |
 help: you might have meant to use `insert`
    |
@@ -14,7 +14,7 @@ error[E0599]: no method named `push_back` found for struct `Vec<_>` in the curre
   --> $DIR/rustc_confusables_std_cases.rs:9:7
    |
 LL |     x.push_back(1);
-   |       ^^^^^^^^^ method not found in `Vec<_>`
+   |       ^^^^^^^^^
    |
 help: you might have meant to use `push`
    |
@@ -26,7 +26,7 @@ error[E0599]: no method named `push` found for struct `VecDeque<T, A>` in the cu
   --> $DIR/rustc_confusables_std_cases.rs:12:7
    |
 LL |     x.push(1);
-   |       ^^^^ method not found in `VecDeque<_>`
+   |       ^^^^
    |
 note: there's an earlier shadowed binding `x` of type `Vec<_>` that has method `push` available
   --> $DIR/rustc_confusables_std_cases.rs:8:9
@@ -104,7 +104,7 @@ error[E0599]: no method named `append` found for struct `String` in the current
   --> $DIR/rustc_confusables_std_cases.rs:24:19
    |
 LL |     String::new().append("");
-   |                   ^^^^^^ method not found in `String`
+   |                   ^^^^^^
    |
 help: you might have meant to use `push_str`
    |
@@ -116,7 +116,7 @@ error[E0599]: no method named `get_line` found for struct `Stdin` in the current
   --> $DIR/rustc_confusables_std_cases.rs:28:11
    |
 LL |     stdin.get_line(&mut buffer).unwrap();
-   |           ^^^^^^^^ method not found in `Stdin`
+   |           ^^^^^^^^
    |
 help: you might have meant to use `read_line`
    |