Pass around Symbols instead of Idents in doctree

src/librustdoc/clean/mod.rs

@@ -1989,16 +1989,13 @@ impl Clean<BareFunctionDecl> for hir::BareFnTy<'_> {
     }
 }
 
-impl Clean<Vec<Item>> for (&hir::Item<'_>, Option<Ident>) {
+impl Clean<Vec<Item>> for (&hir::Item<'_>, Option<Symbol>) {
     fn clean(&self, cx: &DocContext<'_>) -> Vec<Item> {
         use hir::ItemKind;
 
         let (item, renamed) = self;
         let def_id = cx.tcx.hir().local_def_id(item.hir_id).to_def_id();
-        let mut name = match renamed {
-            Some(ident) => ident.name,
-            None => cx.tcx.hir().name(item.hir_id),
-        };
+        let mut name = renamed.unwrap_or_else(|| cx.tcx.hir().name(item.hir_id));
         cx.with_param_env(def_id, || {
             let kind = match item.kind {
                 ItemKind::Static(ty, mutability, body_id) => StaticItem(Static {
@@ -2291,7 +2288,7 @@ impl Clean<Vec<Item>> for doctree::Import<'_> {
     }
 }
 
-impl Clean<Item> for (&hir::ForeignItem<'_>, Option<Ident>) {
+impl Clean<Item> for (&hir::ForeignItem<'_>, Option<Symbol>) {
     fn clean(&self, cx: &DocContext<'_>) -> Item {
         let (item, renamed) = self;
         cx.with_param_env(cx.tcx.hir().local_def_id(item.hir_id).to_def_id(), || {
@@ -2325,18 +2322,18 @@ impl Clean<Item> for (&hir::ForeignItem<'_>, Option<Ident>) {
 
             Item::from_hir_id_and_parts(
                 item.hir_id,
-                Some(renamed.unwrap_or(item.ident).name),
+                Some(renamed.unwrap_or(item.ident.name)),
                 kind,
                 cx,
             )
         })
     }
 }
 
-impl Clean<Item> for (&hir::MacroDef<'_>, Option<Ident>) {
+impl Clean<Item> for (&hir::MacroDef<'_>, Option<Symbol>) {
     fn clean(&self, cx: &DocContext<'_>) -> Item {
         let (item, renamed) = self;
-        let name = renamed.unwrap_or(item.ident).name;
+        let name = renamed.unwrap_or(item.ident.name);
         let tts = item.ast.body.inner_tokens().trees().collect::<Vec<_>>();
         // Extract the spans of all matchers. They represent the "interface" of the macro.
         let matchers = tts.chunks(4).map(|arm| arm[0].span()).collect::<Vec<_>>();

src/librustdoc/doctree.rs

@@ -3,7 +3,7 @@
 crate use self::StructType::*;
 
 use rustc_ast as ast;
-use rustc_span::{self, symbol::Ident, Span, Symbol};
+use rustc_span::{self, Span, Symbol};
 
 use rustc_hir as hir;
 
@@ -16,9 +16,9 @@ crate struct Module<'hir> {
     crate mods: Vec<Module<'hir>>,
     crate id: hir::HirId,
     // (item, renamed)
-    crate items: Vec<(&'hir hir::Item<'hir>, Option<Ident>)>,
-    crate foreigns: Vec<(&'hir hir::ForeignItem<'hir>, Option<Ident>)>,
-    crate macros: Vec<(&'hir hir::MacroDef<'hir>, Option<Ident>)>,
+    crate items: Vec<(&'hir hir::Item<'hir>, Option<Symbol>)>,
+    crate foreigns: Vec<(&'hir hir::ForeignItem<'hir>, Option<Symbol>)>,
+    crate macros: Vec<(&'hir hir::MacroDef<'hir>, Option<Symbol>)>,
     crate is_crate: bool,
 }
 

src/librustdoc/visit_ast.rs

@@ -10,7 +10,7 @@ use rustc_hir::Node;
 use rustc_middle::middle::privacy::AccessLevel;
 use rustc_middle::ty::TyCtxt;
 use rustc_span::source_map::Spanned;
-use rustc_span::symbol::{kw, sym, Ident, Symbol};
+use rustc_span::symbol::{kw, sym, Symbol};
 use rustc_span::{self, Span};
 
 use std::mem;
@@ -116,7 +116,7 @@ impl<'a, 'tcx> RustdocVisitor<'a, 'tcx> {
         &mut self,
         id: hir::HirId,
         res: Res,
-        renamed: Option<Ident>,
+        renamed: Option<Symbol>,
         glob: bool,
         om: &mut Module<'tcx>,
         please_inline: bool,
@@ -226,11 +226,11 @@ impl<'a, 'tcx> RustdocVisitor<'a, 'tcx> {
     fn visit_item(
         &mut self,
         item: &'tcx hir::Item<'_>,
-        renamed: Option<Ident>,
+        renamed: Option<Symbol>,
         om: &mut Module<'tcx>,
     ) {
         debug!("visiting item {:?}", item);
-        let ident = renamed.unwrap_or(item.ident);
+        let name = renamed.unwrap_or(item.ident.name);
 
         if item.vis.node.is_pub() {
             let def_id = self.cx.tcx.hir().local_def_id(item.hir_id);
@@ -266,7 +266,7 @@ impl<'a, 'tcx> RustdocVisitor<'a, 'tcx> {
                         }
                         _ => false,
                     });
-                    let ident = if is_glob { None } else { Some(ident) };
+                    let ident = if is_glob { None } else { Some(name) };
                     if self.maybe_inline_local(
                         item.hir_id,
                         path.res,
@@ -280,7 +280,7 @@ impl<'a, 'tcx> RustdocVisitor<'a, 'tcx> {
                 }
 
                 om.imports.push(Import {
-                    name: ident.name,
+                    name,
                     id: item.hir_id,
                     vis: &item.vis,
                     attrs: &item.attrs,
@@ -296,7 +296,7 @@ impl<'a, 'tcx> RustdocVisitor<'a, 'tcx> {
                     &item.vis,
                     item.hir_id,
                     m,
-                    Some(ident.name),
+                    Some(name),
                 ));
             }
             hir::ItemKind::Fn(..)
@@ -312,7 +312,7 @@ impl<'a, 'tcx> RustdocVisitor<'a, 'tcx> {
             hir::ItemKind::Const(..) => {
                 // Underscore constants do not correspond to a nameable item and
                 // so are never useful in documentation.
-                if ident.name != kw::Underscore {
+                if name != kw::Underscore {
                     om.items.push((item, renamed));
                 }
             }
@@ -329,7 +329,7 @@ impl<'a, 'tcx> RustdocVisitor<'a, 'tcx> {
     fn visit_foreign_item(
         &mut self,
         item: &'tcx hir::ForeignItem<'_>,
-        renamed: Option<Ident>,
+        renamed: Option<Symbol>,
         om: &mut Module<'tcx>,
     ) {
         // If inlining we only want to include public functions.