Remove unnecessary fields and parameters in rustdoc

src/librustdoc/formats/renderer.rs

@@ -1,5 +1,5 @@
 use rustc_middle::ty::TyCtxt;
-use rustc_span::{edition::Edition, Symbol};
+use rustc_span::Symbol;
 
 use crate::clean;
 use crate::config::RenderOptions;
@@ -23,7 +23,6 @@ crate trait FormatRenderer<'tcx>: Sized {
     fn init(
         krate: clean::Crate,
         options: RenderOptions,
-        edition: Edition,
         cache: Cache,
         tcx: TyCtxt<'tcx>,
     ) -> Result<(Self, clean::Crate), Error>;
@@ -35,19 +34,15 @@ crate trait FormatRenderer<'tcx>: Sized {
     fn item(&mut self, item: clean::Item) -> Result<(), Error>;
 
     /// Renders a module (should not handle recursing into children).
-    fn mod_item_in(&mut self, item: &clean::Item, item_name: &str) -> Result<(), Error>;
+    fn mod_item_in(&mut self, item: &clean::Item) -> Result<(), Error>;
 
     /// Runs after recursively rendering all sub-items of a module.
-    fn mod_item_out(&mut self, item_name: &str) -> Result<(), Error>;
+    fn mod_item_out(&mut self) -> Result<(), Error> {
+        Ok(())
+    }
 
     /// Post processing hook for cleanup and dumping output to files.
-    ///
-    /// A handler is available if the renderer wants to report errors.
-    fn after_krate(
-        &mut self,
-        crate_name: Symbol,
-        diag: &rustc_errors::Handler,
-    ) -> Result<(), Error>;
+    fn after_krate(&mut self) -> Result<(), Error>;
 
     fn cache(&self) -> &Cache;
 }
@@ -57,37 +52,31 @@ crate fn run_format<'tcx, T: FormatRenderer<'tcx>>(
     krate: clean::Crate,
     options: RenderOptions,
     cache: Cache,
-    diag: &rustc_errors::Handler,
-    edition: Edition,
     tcx: TyCtxt<'tcx>,
 ) -> Result<(), Error> {
     let prof = &tcx.sess.prof;
 
     let emit_crate = options.should_emit_crate();
     let (mut format_renderer, krate) = prof
         .extra_verbose_generic_activity("create_renderer", T::descr())
-        .run(|| T::init(krate, options, edition, cache, tcx))?;
+        .run(|| T::init(krate, options, cache, tcx))?;
 
     if !emit_crate {
         return Ok(());
     }
 
     // Render the crate documentation
-    let crate_name = krate.name;
     let mut work = vec![(format_renderer.make_child_renderer(), krate.module)];
 
     let unknown = Symbol::intern("<unknown item>");
     while let Some((mut cx, item)) = work.pop() {
         if item.is_mod() && T::RUN_ON_MODULE {
             // modules are special because they add a namespace. We also need to
             // recurse into the items of the module as well.
-            let name = item.name.as_ref().unwrap().to_string();
-            if name.is_empty() {
-                panic!("Unexpected module with empty name");
-            }
-            let _timer = prof.generic_activity_with_arg("render_mod_item", name.as_str());
+            let _timer =
+                prof.generic_activity_with_arg("render_mod_item", item.name.unwrap().to_string());
 
-            cx.mod_item_in(&item, &name)?;
+            cx.mod_item_in(&item)?;
             let module = match *item.kind {
                 clean::StrippedItem(box clean::ModuleItem(m)) | clean::ModuleItem(m) => m,
                 _ => unreachable!(),
@@ -97,7 +86,7 @@ crate fn run_format<'tcx, T: FormatRenderer<'tcx>>(
                 work.push((cx.make_child_renderer(), it));
             }
 
-            cx.mod_item_out(&name)?;
+            cx.mod_item_out()?;
         // FIXME: checking `item.name.is_some()` is very implicit and leads to lots of special
         // cases. Use an explicit match instead.
         } else if item.name.is_some() && !item.is_extern_crate() {
@@ -106,5 +95,5 @@ crate fn run_format<'tcx, T: FormatRenderer<'tcx>>(
         }
     }
     prof.extra_verbose_generic_activity("renderer_after_krate", T::descr())
-        .run(|| format_renderer.after_krate(crate_name, diag))
+        .run(|| format_renderer.after_krate())
 }

src/librustdoc/html/render/context.rs

@@ -11,7 +11,7 @@ use rustc_middle::ty::TyCtxt;
 use rustc_session::Session;
 use rustc_span::edition::Edition;
 use rustc_span::source_map::FileName;
-use rustc_span::{symbol::sym, Symbol};
+use rustc_span::symbol::sym;
 
 use super::cache::{build_index, ExternalLocation};
 use super::print_item::{full_path, item_path, print_item};
@@ -111,8 +111,6 @@ crate struct SharedContext<'tcx> {
     crate static_root_path: Option<String>,
     /// The fs handle we are working with.
     crate fs: DocFS,
-    /// The default edition used to parse doctests.
-    crate edition: Edition,
     pub(super) codes: ErrorCodes,
     pub(super) playground: Option<markdown::Playground>,
     all: RefCell<AllTypes>,
@@ -141,6 +139,10 @@ impl SharedContext<'_> {
     crate fn maybe_collapsed_doc_value<'a>(&self, item: &'a clean::Item) -> Option<String> {
         if self.collapsed { item.collapsed_doc_value() } else { item.doc_value() }
     }
+
+    crate fn edition(&self) -> Edition {
+        self.tcx.sess.edition()
+    }
 }
 
 impl<'tcx> Context<'tcx> {
@@ -346,7 +348,6 @@ impl<'tcx> FormatRenderer<'tcx> for Context<'tcx> {
     fn init(
         mut krate: clean::Crate,
         options: RenderOptions,
-        edition: Edition,
         mut cache: Cache,
         tcx: TyCtxt<'tcx>,
     ) -> Result<(Self, clean::Crate), Error> {
@@ -435,7 +436,6 @@ impl<'tcx> FormatRenderer<'tcx> for Context<'tcx> {
             resource_suffix,
             static_root_path,
             fs: DocFS::new(sender),
-            edition,
             codes: ErrorCodes::from(unstable_features.is_nightly_build()),
             playground,
             all: RefCell::new(AllTypes::new()),
@@ -494,11 +494,8 @@ impl<'tcx> FormatRenderer<'tcx> for Context<'tcx> {
         }
     }
 
-    fn after_krate(
-        &mut self,
-        crate_name: Symbol,
-        diag: &rustc_errors::Handler,
-    ) -> Result<(), Error> {
+    fn after_krate(&mut self) -> Result<(), Error> {
+        let crate_name = self.tcx().crate_name(LOCAL_CRATE);
         let final_file = self.dst.join(&*crate_name.as_str()).join("all.html");
         let settings_file = self.dst.join("settings.html");
 
@@ -572,15 +569,16 @@ impl<'tcx> FormatRenderer<'tcx> for Context<'tcx> {
 
         // Flush pending errors.
         Rc::get_mut(&mut self.shared).unwrap().fs.close();
-        let nb_errors = self.shared.errors.iter().map(|err| diag.struct_err(&err).emit()).count();
+        let nb_errors =
+            self.shared.errors.iter().map(|err| self.tcx().sess.struct_err(&err).emit()).count();
         if nb_errors > 0 {
             Err(Error::new(io::Error::new(io::ErrorKind::Other, "I/O error"), ""))
         } else {
             Ok(())
         }
     }
 
-    fn mod_item_in(&mut self, item: &clean::Item, item_name: &str) -> Result<(), Error> {
+    fn mod_item_in(&mut self, item: &clean::Item) -> Result<(), Error> {
         // Stripped modules survive the rustdoc passes (i.e., `strip-private`)
         // if they contain impls for public types. These modules can also
         // contain items such as publicly re-exported structures.
@@ -592,8 +590,9 @@ impl<'tcx> FormatRenderer<'tcx> for Context<'tcx> {
             self.render_redirect_pages = item.is_stripped();
         }
         let scx = &self.shared;
-        self.dst.push(item_name);
-        self.current.push(item_name.to_owned());
+        let item_name = item.name.as_ref().unwrap().to_string();
+        self.dst.push(&item_name);
+        self.current.push(item_name);
 
         info!("Recursing into {}", self.dst.display());
 
@@ -619,7 +618,7 @@ impl<'tcx> FormatRenderer<'tcx> for Context<'tcx> {
         Ok(())
     }
 
-    fn mod_item_out(&mut self, _item_name: &str) -> Result<(), Error> {
+    fn mod_item_out(&mut self) -> Result<(), Error> {
         info!("Recursed; leaving {}", self.dst.display());
 
         // Go back to where we were at

src/librustdoc/html/render/mod.rs

@@ -530,7 +530,7 @@ fn render_markdown(
             &links,
             &mut ids,
             cx.shared.codes,
-            cx.shared.edition,
+            cx.shared.edition(),
             &cx.shared.playground
         )
         .into_string()
@@ -660,7 +660,7 @@ fn short_item_info(
                 &note,
                 &mut ids,
                 error_codes,
-                cx.shared.edition,
+                cx.shared.edition(),
                 &cx.shared.playground,
             );
             message.push_str(&format!(": {}", html.into_string()));
@@ -702,7 +702,7 @@ fn short_item_info(
                     &unstable_reason.as_str(),
                     &mut ids,
                     error_codes,
-                    cx.shared.edition,
+                    cx.shared.edition(),
                     &cx.shared.playground,
                 )
                 .into_string()
@@ -1358,7 +1358,7 @@ fn render_impl(
                     &i.impl_item.links(cx),
                     &mut ids,
                     cx.shared.codes,
-                    cx.shared.edition,
+                    cx.shared.edition(),
                     &cx.shared.playground
                 )
                 .into_string()

src/librustdoc/html/render/write_shared.rs

@@ -425,7 +425,7 @@ pub(super) fn write_shared(
             md_opts.output = cx.dst.clone();
             md_opts.external_html = (*cx.shared).layout.external_html.clone();
 
-            crate::markdown::render(&index_page, md_opts, cx.shared.edition)
+            crate::markdown::render(&index_page, md_opts, cx.shared.edition())
                 .map_err(|e| Error::new(e, &index_page))?;
         } else {
             let dst = cx.dst.join("index.html");

src/librustdoc/html/sources.rs

@@ -129,7 +129,7 @@ impl SourceCollector<'_, 'tcx> {
             &self.scx.layout,
             &page,
             "",
-            |buf: &mut _| print_src(buf, contents, self.scx.edition),
+            |buf: &mut _| print_src(buf, contents, self.scx.edition()),
             &self.scx.style_files,
         );
         self.scx.fs.write(&cur, v.as_bytes())?;

src/librustdoc/json/mod.rs

@@ -14,7 +14,6 @@ use std::rc::Rc;
 use rustc_data_structures::fx::FxHashMap;
 use rustc_middle::ty::TyCtxt;
 use rustc_session::Session;
-use rustc_span::{edition::Edition, Symbol};
 
 use rustdoc_json_types as types;
 
@@ -134,7 +133,6 @@ impl<'tcx> FormatRenderer<'tcx> for JsonRenderer<'tcx> {
     fn init(
         krate: clean::Crate,
         options: RenderOptions,
-        _edition: Edition,
         cache: Cache,
         tcx: TyCtxt<'tcx>,
     ) -> Result<(Self, clean::Crate), Error> {
@@ -183,7 +181,7 @@ impl<'tcx> FormatRenderer<'tcx> for JsonRenderer<'tcx> {
         Ok(())
     }
 
-    fn mod_item_in(&mut self, item: &clean::Item, _module_name: &str) -> Result<(), Error> {
+    fn mod_item_in(&mut self, item: &clean::Item) -> Result<(), Error> {
         use clean::types::ItemKind::*;
         if let ModuleItem(m) = &*item.kind {
             for item in &m.items {
@@ -200,15 +198,7 @@ impl<'tcx> FormatRenderer<'tcx> for JsonRenderer<'tcx> {
         Ok(())
     }
 
-    fn mod_item_out(&mut self, _item_name: &str) -> Result<(), Error> {
-        Ok(())
-    }
-
-    fn after_krate(
-        &mut self,
-        _crate_name: Symbol,
-        _diag: &rustc_errors::Handler,
-    ) -> Result<(), Error> {
+    fn after_krate(&mut self) -> Result<(), Error> {
         debug!("Done with crate");
         let mut index = (*self.index).clone().into_inner();
         index.extend(self.get_trait_items());

src/librustdoc/lib.rs

@@ -656,14 +656,13 @@ fn run_renderer<'tcx, T: formats::FormatRenderer<'tcx>>(
     krate: clean::Crate,
     renderopts: config::RenderOptions,
     cache: formats::cache::Cache,
-    diag: &rustc_errors::Handler,
-    edition: rustc_span::edition::Edition,
     tcx: TyCtxt<'tcx>,
 ) -> MainResult {
-    match formats::run_format::<T>(krate, renderopts, cache, &diag, edition, tcx) {
+    match formats::run_format::<T>(krate, renderopts, cache, tcx) {
         Ok(_) => Ok(()),
         Err(e) => {
-            let mut msg = diag.struct_err(&format!("couldn't generate documentation: {}", e.error));
+            let mut msg =
+                tcx.sess.struct_err(&format!("couldn't generate documentation: {}", e.error));
             let file = e.file.display().to_string();
             if file.is_empty() {
                 msg.emit()
@@ -692,7 +691,6 @@ fn main_options(options: config::Options) -> MainResult {
 
     // need to move these items separately because we lose them by the time the closure is called,
     // but we can't create the Handler ahead of time because it's not Send
-    let diag_opts = (options.error_format, options.edition, options.debugging_opts.clone());
     let show_coverage = options.show_coverage;
     let run_check = options.run_check;
 
@@ -758,28 +756,12 @@ fn main_options(options: config::Options) -> MainResult {
                 }
 
                 info!("going to format");
-                let (error_format, edition, debugging_options) = diag_opts;
-                let diag = core::new_handler(error_format, None, &debugging_options);
                 match output_format {
                     config::OutputFormat::Html => sess.time("render_html", || {
-                        run_renderer::<html::render::Context<'_>>(
-                            krate,
-                            render_opts,
-                            cache,
-                            &diag,
-                            edition,
-                            tcx,
-                        )
+                        run_renderer::<html::render::Context<'_>>(krate, render_opts, cache, tcx)
                     }),
                     config::OutputFormat::Json => sess.time("render_json", || {
-                        run_renderer::<json::JsonRenderer<'_>>(
-                            krate,
-                            render_opts,
-                            cache,
-                            &diag,
-                            edition,
-                            tcx,
-                        )
+                        run_renderer::<json::JsonRenderer<'_>>(krate, render_opts, cache, tcx)
                     }),
                 }
             })