Apply first review round suggestions

Author: GuillaumeGomez

compiler/rustc_feature/src/removed.rs

@@ -101,6 +101,8 @@ declare_features! (
      Some("never properly implemented; requires significant design work"), 127655),
     /// Allows deriving traits as per `SmartPointer` specification
     (removed, derive_smart_pointer, "1.84.0", Some(123430), Some("replaced by `CoercePointee`"), 131284),
+    /// Allows `#[doc(cfg_hide(...))]`.
+    (removed, doc_cfg_hide, "1.57.0", Some(43781), Some("merged into `doc_cfg`"), 138907),
     /// Allows using `#[doc(keyword = "...")]`.
     (removed, doc_keyword, "1.58.0", Some(51315),
      Some("merged into `#![feature(rustdoc_internals)]`"), 90420),

compiler/rustc_passes/messages.ftl

@@ -153,7 +153,7 @@ passes_doc_cfg_hide_takes_list =
     `#[doc(cfg_hide(...))]` takes a list of attributes
 
 passes_doc_auto_cfg_expects_hide_or_show =
-    `only "hide" or "show" are allowed in "#[doc(auto_cfg(...))]"`
+    only `hide` or `show` are allowed in `#[doc(auto_cfg(...))]`
 
 passes_doc_auto_cfg_hide_show_expects_list =
     `#![doc(auto_cfg({$attr_name}(...)))]` expects a list of items
@@ -162,7 +162,7 @@ passes_doc_auto_cfg_hide_show_unexpected_item =
     `#![doc(auto_cfg({$attr_name}(...)))]` only accepts identifiers or key/value items
 
 passes_doc_auto_cfg_wrong_literal =
-    `expected boolean for #[doc(auto_cfg = ...)]`
+    expected boolean for `#[doc(auto_cfg = ...)]`
 
 passes_doc_expect_str =
     doc {$attr_name} attribute expects a string: #[doc({$attr_name} = "a")]

compiler/rustc_span/src/symbol.rs

@@ -878,6 +878,7 @@ symbols! {
         doc_alias,
         doc_auto_cfg,
         doc_cfg,
+        doc_cfg_hide,
         doc_keyword,
         doc_masked,
         doc_notable_trait,

src/librustdoc/passes/propagate_doc_cfg.rs

@@ -33,19 +33,7 @@ struct CfgPropagator<'a, 'tcx> {
 /// Returns true if the provided `token` is a `cfg` ident.
 fn is_cfg_token(token: &TokenTree) -> bool {
     // We only keep `doc(cfg)` items.
-    matches!(
-        token,
-        TokenTree::Token(
-            Token {
-                kind: TokenKind::Ident(
-                    ident,
-                    _,
-                ),
-                ..
-            },
-            _,
-        ) if *ident == sym::cfg,
-    )
+    matches!(token, TokenTree::Token(Token { kind: TokenKind::Ident(sym::cfg, _,), .. }, _,),)
 }
 
 /// We only want to keep `#[cfg()]` and `#[doc(cfg())]` attributes so we rebuild a vec of

src/librustdoc/visit_ast.rs

@@ -9,7 +9,7 @@ use rustc_hir::attrs::AttributeKind;
 use rustc_hir::def::{DefKind, MacroKinds, Res};
 use rustc_hir::def_id::{DefId, DefIdMap, LocalDefId, LocalDefIdSet};
 use rustc_hir::intravisit::{Visitor, walk_body, walk_item};
-use rustc_hir::{CRATE_HIR_ID, Node, find_attr};
+use rustc_hir::{Node, find_attr};
 use rustc_middle::hir::nested_filter;
 use rustc_middle::ty::TyCtxt;
 use rustc_span::Span;

tests/rustdoc-ui/doc-cfg.stderr

@@ -1,4 +1,4 @@
-error: `only "hide" or "show" are allowed in "#[doc(auto_cfg(...))]"`
+error: only `hide` or `show` are allowed in `#[doc(auto_cfg(...))]`
   --> $DIR/doc-cfg.rs:11:7
    |
 LL | #[doc(auto_cfg(42))]
@@ -30,13 +30,13 @@ error: `#![doc(auto_cfg(hide(...)))]` only accepts identifiers or key/value item
 LL | #[doc(auto_cfg(hide(foo::bar)))]
    |                     ^^^^^^^^
 
-error: `expected boolean for #[doc(auto_cfg = ...)]`
+error: expected boolean for `#[doc(auto_cfg = ...)]`
   --> $DIR/doc-cfg.rs:16:7
    |
 LL | #[doc(auto_cfg = 42)]
    |       ^^^^^^^^^^^^^
 
-error: `expected boolean for #[doc(auto_cfg = ...)]`
+error: expected boolean for `#[doc(auto_cfg = ...)]`
   --> $DIR/doc-cfg.rs:17:7
    |
 LL | #[doc(auto_cfg = "a")]