x clippy src/librustdoc --fix

src/librustdoc/clean/mod.rs

@@ -2539,7 +2539,7 @@ fn clean_generic_args<'tcx>(
 ) -> GenericArgs {
     // FIXME(return_type_notation): Fix RTN parens rendering
     if let Some((inputs, output)) = generic_args.paren_sugar_inputs_output() {
-        let inputs = inputs.iter().map(|x| clean_ty(x, cx)).collect::<ThinVec<_>>().into();
+        let inputs = inputs.iter().map(|x| clean_ty(x, cx)).collect::<ThinVec<_>>();
         let output = match output.kind {
             hir::TyKind::Tup(&[]) => None,
             _ => Some(Box::new(clean_ty(output, cx))),
@@ -2560,8 +2560,7 @@ fn clean_generic_args<'tcx>(
                 }
                 hir::GenericArg::Infer(_inf) => GenericArg::Infer,
             })
-            .collect::<ThinVec<_>>()
-            .into();
+            .collect::<ThinVec<_>>();
         let constraints = generic_args
             .constraints
             .iter()

src/librustdoc/clean/types.rs

@@ -2419,7 +2419,7 @@ impl ConstantKind {
             ConstantKind::Local { body, .. } | ConstantKind::Anonymous { body } => {
                 rendered_const(tcx, tcx.hir_body(body), tcx.hir_body_owner_def_id(body))
             }
-            ConstantKind::Infer { .. } => "_".to_string(),
+            ConstantKind::Infer => "_".to_string(),
         }
     }
 

src/librustdoc/clean/utils.rs

@@ -223,7 +223,7 @@ fn clean_middle_generic_args_with_constraints<'tcx>(
 
     let args = clean_middle_generic_args(cx, args.map_bound(|args| &args[..]), has_self, did);
 
-    GenericArgs::AngleBracketed { args: args.into(), constraints }
+    GenericArgs::AngleBracketed { args: args, constraints }
 }
 
 pub(super) fn clean_middle_path<'tcx>(
@@ -524,7 +524,7 @@ pub(crate) fn register_res(cx: &mut DocContext<'_>, res: Res) -> DefId {
             | AssocConst
             | Variant
             | Fn
-            | TyAlias { .. }
+            | TyAlias
             | Enum
             | Trait
             | Struct

src/librustdoc/display.rs

@@ -22,7 +22,7 @@ where
         let mut iter = self.into_iter();
         let Some(first) = iter.next() else { return Ok(()) };
         first.fmt(f)?;
-        while let Some(item) = iter.next() {
+        for item in iter {
             f.write_str(sep)?;
             item.fmt(f)?;
         }

src/librustdoc/doctest/extracted.rs

@@ -33,7 +33,7 @@ impl ExtractedDocTests {
         opts: &super::GlobalTestOptions,
         options: &RustdocOptions,
     ) {
-        let edition = scraped_test.edition(&options);
+        let edition = scraped_test.edition(options);
 
         let ScrapedDocTest { filename, line, langstr, text, name } = scraped_test;
 
@@ -48,7 +48,7 @@ impl ExtractedDocTests {
         let (full_test_code, size) = doctest.generate_unique_doctest(
             &text,
             langstr.test_harness,
-            &opts,
+            opts,
             Some(&opts.crate_name),
         );
         self.doctests.push(ExtractedDocTest {

src/librustdoc/html/format.rs

@@ -625,8 +625,7 @@ pub(crate) fn href_relative_parts<'fqp>(
             let dissimilar_part_count = relative_to_fqp.len() - i;
             let fqp_module = &fqp[i..fqp.len()];
             return Box::new(
-                iter::repeat(sym::dotdot)
-                    .take(dissimilar_part_count)
+                std::iter::repeat_n(sym::dotdot, dissimilar_part_count)
                     .chain(fqp_module.iter().copied()),
             );
         }
@@ -639,7 +638,7 @@ pub(crate) fn href_relative_parts<'fqp>(
         Ordering::Greater => {
             // e.g. linking to std::sync from std::sync::atomic
             let dissimilar_part_count = relative_to_fqp.len() - fqp.len();
-            Box::new(iter::repeat(sym::dotdot).take(dissimilar_part_count))
+            Box::new(std::iter::repeat_n(sym::dotdot, dissimilar_part_count))
         }
         Ordering::Equal => {
             // linking to the same module
@@ -770,10 +769,9 @@ fn primitive_link_fragment(
                     ExternalLocation::Local => {
                         let cname_sym = ExternalCrate { crate_num: def_id.krate }.name(cx.tcx());
                         Some(if cx.current.first() == Some(&cname_sym) {
-                            iter::repeat(sym::dotdot).take(cx.current.len() - 1).collect()
+                            std::iter::repeat_n(sym::dotdot, cx.current.len() - 1).collect()
                         } else {
-                            iter::repeat(sym::dotdot)
-                                .take(cx.current.len())
+                            std::iter::repeat_n(sym::dotdot, cx.current.len())
                                 .chain(iter::once(cname_sym))
                                 .collect()
                         })

src/librustdoc/html/highlight.rs

@@ -100,7 +100,7 @@ fn write_header(
     }
 
     if let Some(extra) = extra_content {
-        out.push_str(&extra);
+        out.push_str(extra);
     }
     if class.is_empty() {
         write_str(
@@ -233,7 +233,7 @@ impl<F: Write> TokenHandler<'_, '_, F> {
 
     #[inline]
     fn write_line_number(&mut self, line: u32, extra: &'static str) {
-        (self.write_line_number)(&mut self.out, line, extra);
+        (self.write_line_number)(self.out, line, extra);
     }
 }
 
@@ -610,7 +610,7 @@ impl Decorations {
         let (mut starts, mut ends): (Vec<_>, Vec<_>) = info
             .0
             .iter()
-            .flat_map(|(&kind, ranges)| ranges.into_iter().map(move |&(lo, hi)| ((lo, kind), hi)))
+            .flat_map(|(&kind, ranges)| ranges.iter().map(move |&(lo, hi)| ((lo, kind), hi)))
             .unzip();
 
         // Sort the sequences in document order.

src/librustdoc/html/markdown.rs

@@ -1792,7 +1792,7 @@ pub(crate) fn markdown_links<'md, R>(
                     }
                 }
             } else if !c.is_ascii_whitespace() {
-                while let Some((j, c)) = iter.next() {
+                for (j, c) in iter.by_ref() {
                     if c.is_ascii_whitespace() {
                         return MarkdownLinkRange::Destination(i + span.start..j + span.start);
                     }

src/librustdoc/html/render/print_item.rs

@@ -1192,8 +1192,7 @@ fn item_trait(cx: &Context<'_>, it: &clean::Item, t: &clean::Trait) -> impl fmt:
         // to already be in the HTML, and will be ignored.
         //
         // [JSONP]: https://en.wikipedia.org/wiki/JSONP
-        let mut js_src_path: UrlPartsBuilder = std::iter::repeat("..")
-            .take(cx.current.len())
+        let mut js_src_path: UrlPartsBuilder = std::iter::repeat_n("..", cx.current.len())
             .chain(std::iter::once("trait.impl"))
             .collect();
         if let Some(did) = it.item_id.as_def_id()
@@ -1446,8 +1445,7 @@ fn item_type_alias(cx: &Context<'_>, it: &clean::Item, t: &clean::TypeAlias) ->
             && let get_local = { || cache.paths.get(&self_did).map(|(p, _)| p) }
             && let Some(self_fqp) = cache.exact_paths.get(&self_did).or_else(get_local)
         {
-            let mut js_src_path: UrlPartsBuilder = std::iter::repeat("..")
-                .take(cx.current.len())
+            let mut js_src_path: UrlPartsBuilder = std::iter::repeat_n("..", cx.current.len())
                 .chain(std::iter::once("type.impl"))
                 .collect();
             js_src_path.extend(target_fqp[..target_fqp.len() - 1].iter().copied());

src/librustdoc/html/render/search_index/encode.rs

@@ -182,9 +182,9 @@ pub(crate) fn write_bitmap_to_bytes(
             out.write_all(&[b])?;
         }
         if size < NO_OFFSET_THRESHOLD {
-            4 + 4 * size + ((size + 7) / 8)
+            4 + 4 * size + size.div_ceil(8)
         } else {
-            4 + 8 * size + ((size + 7) / 8)
+            4 + 8 * size + size.div_ceil(8)
         }
     } else {
         out.write_all(&u32::to_le_bytes(SERIAL_COOKIE_NO_RUNCONTAINER))?;

src/librustdoc/passes/collect_intra_doc_links.rs

@@ -2060,7 +2060,7 @@ fn resolution_failure(
                                 return;
                             }
                             Trait
-                            | TyAlias { .. }
+                            | TyAlias
                             | ForeignTy
                             | OpaqueTy
                             | TraitAlias

src/librustdoc/passes/propagate_stability.rs

@@ -39,15 +39,15 @@ impl DocFolder for StabilityPropagator<'_, '_> {
                 let item_stability = self.cx.tcx.lookup_stability(def_id);
                 let inline_stability =
                     item.inline_stmt_id.and_then(|did| self.cx.tcx.lookup_stability(did));
-                let is_glob_export = item.inline_stmt_id.and_then(|id| {
+                let is_glob_export = item.inline_stmt_id.map(|id| {
                     let hir_id = self.cx.tcx.local_def_id_to_hir_id(id);
-                    Some(matches!(
+                    matches!(
                         self.cx.tcx.hir_node(hir_id),
                         rustc_hir::Node::Item(rustc_hir::Item {
                             kind: rustc_hir::ItemKind::Use(_, rustc_hir::UseKind::Glob),
                             ..
                         })
-                    ))
+                    )
                 });
                 let own_stability = if let Some(item_stab) = item_stability
                     && let StabilityLevel::Stable { since: _, allowed_through_unstable_modules } =