Auto merge of #80154 - GuillaumeGomez:str-to-symbol, r=jyn514

Continue String to Symbol conversion in rustdoc (2)

Follow-up of #80119.

This is the last one (and I actually expected more conversions but seems like it was the last one remaining...).

r? `@jyn514`

src/librustdoc/clean/blanket_impl.rs

@@ -103,7 +103,7 @@ impl<'a, 'tcx> BlanketImplFinder<'a, 'tcx> {
                     .cx
                     .tcx
                     .provided_trait_methods(trait_def_id)
-                    .map(|meth| meth.ident.to_string())
+                    .map(|meth| meth.ident.name)
                     .collect();
 
                 impls.push(Item {

src/librustdoc/clean/inline.rs

@@ -427,7 +427,7 @@ fn merge_attrs(
 
     let provided = trait_
         .def_id()
-        .map(|did| tcx.provided_trait_methods(did).map(|meth| meth.ident.to_string()).collect())
+        .map(|did| tcx.provided_trait_methods(did).map(|meth| meth.ident.name).collect())
         .unwrap_or_default();
 
     debug!("build_impl: impl {:?} for {:?}", trait_.def_id(), for_.def_id());

src/librustdoc/clean/mod.rs

@@ -2065,9 +2065,9 @@ fn clean_impl(impl_: &hir::Item<'_>, cx: &DocContext<'_>) -> Vec<Item> {
         build_deref_target_impls(cx, &items, &mut ret);
     }
 
-    let provided: FxHashSet<String> = trait_
+    let provided: FxHashSet<Symbol> = trait_
         .def_id()
-        .map(|did| cx.tcx.provided_trait_methods(did).map(|meth| meth.ident.to_string()).collect())
+        .map(|did| cx.tcx.provided_trait_methods(did).map(|meth| meth.ident.name).collect())
         .unwrap_or_default();
 
     let for_ = for_.clean(cx);

src/librustdoc/clean/types.rs

@@ -1762,7 +1762,7 @@ fn def_id(&self) -> Option<DefId> {
 crate struct Impl {
     crate unsafety: hir::Unsafety,
     crate generics: Generics,
-    crate provided_trait_methods: FxHashSet<String>,
+    crate provided_trait_methods: FxHashSet<Symbol>,
     crate trait_: Option<Type>,
     crate for_: Type,
     crate items: Vec<Item>,

src/librustdoc/html/render/mod.rs

@@ -2983,7 +2983,7 @@ fn method(
             AssocItemLink::GotoSource(did, provided_methods) => {
                 // We're creating a link from an impl-item to the corresponding
                 // trait-item and need to map the anchored type accordingly.
-                let ty = if provided_methods.contains(&*name.as_str()) {
+                let ty = if provided_methods.contains(&name) {
                     ItemType::Method
                 } else {
                     ItemType::TyMethod
@@ -3452,7 +3452,7 @@ fn render_union(
 #[derive(Copy, Clone)]
 enum AssocItemLink<'a> {
     Anchor(Option<&'a str>),
-    GotoSource(DefId, &'a FxHashSet<String>),
+    GotoSource(DefId, &'a FxHashSet<Symbol>),
 }
 
 impl<'a> AssocItemLink<'a> {

src/librustdoc/json/conversions.rs

@@ -440,7 +440,10 @@ fn from(impl_: clean::Impl) -> Self {
         Impl {
             is_unsafe: unsafety == rustc_hir::Unsafety::Unsafe,
             generics: generics.into(),
-            provided_trait_methods: provided_trait_methods.into_iter().collect(),
+            provided_trait_methods: provided_trait_methods
+                .into_iter()
+                .map(|x| x.to_string())
+                .collect(),
             trait_: trait_.map(Into::into),
             for_: for_.into(),
             items: ids(items),