Rollup of 5 pull requests

compiler/rustc_hir_analysis/src/astconv/mod.rs

@@ -274,7 +274,7 @@ impl<'o, 'tcx> dyn AstConv<'tcx> + 'o {
             item_segment.args(),
             item_segment.infer_args,
             None,
-            None,
+            ty::BoundConstness::NotConst,
         );
         if let Some(b) = item_segment.args().bindings.first() {
             Self::prohibit_assoc_ty_binding(self.tcx(), b.span);
@@ -324,7 +324,7 @@ impl<'o, 'tcx> dyn AstConv<'tcx> + 'o {
         generic_args: &'a hir::GenericArgs<'_>,
         infer_args: bool,
         self_ty: Option<Ty<'tcx>>,
-        constness: Option<ty::BoundConstness>,
+        constness: ty::BoundConstness,
     ) -> (SubstsRef<'tcx>, GenericArgCountResult) {
         // If the type is parameterized by this region, then replace this
         // region with the current anon region binding (in other words,
@@ -538,7 +538,7 @@ impl<'o, 'tcx> dyn AstConv<'tcx> + 'o {
             &mut substs_ctx,
         );
 
-        if let Some(ty::BoundConstness::ConstIfConst) = constness
+        if let ty::BoundConstness::ConstIfConst = constness
             && generics.has_self && !tcx.has_attr(def_id, sym::const_trait)
         {
             tcx.sess.emit_err(crate::errors::ConstBoundForNonConstTrait { span } );
@@ -611,7 +611,7 @@ impl<'o, 'tcx> dyn AstConv<'tcx> + 'o {
             item_segment.args(),
             item_segment.infer_args,
             None,
-            None,
+            ty::BoundConstness::NotConst,
         );
 
         if let Some(b) = item_segment.args().bindings.first() {
@@ -641,7 +641,7 @@ impl<'o, 'tcx> dyn AstConv<'tcx> + 'o {
             self_ty,
             trait_ref.path.segments.last().unwrap(),
             true,
-            Some(constness),
+            constness,
         )
     }
 
@@ -668,7 +668,7 @@ impl<'o, 'tcx> dyn AstConv<'tcx> + 'o {
             args,
             infer_args,
             Some(self_ty),
-            Some(constness),
+            constness,
         );
 
         let tcx = self.tcx();
@@ -798,7 +798,7 @@ impl<'o, 'tcx> dyn AstConv<'tcx> + 'o {
         self_ty: Ty<'tcx>,
         trait_segment: &hir::PathSegment<'_>,
         is_impl: bool,
-        constness: Option<ty::BoundConstness>,
+        constness: ty::BoundConstness,
     ) -> ty::TraitRef<'tcx> {
         let (substs, _) = self.create_substs_for_ast_trait_ref(
             span,
@@ -822,7 +822,7 @@ impl<'o, 'tcx> dyn AstConv<'tcx> + 'o {
         self_ty: Ty<'tcx>,
         trait_segment: &'a hir::PathSegment<'a>,
         is_impl: bool,
-        constness: Option<ty::BoundConstness>,
+        constness: ty::BoundConstness,
     ) -> (SubstsRef<'tcx>, GenericArgCountResult) {
         self.complain_about_internal_fn_trait(span, trait_def_id, trait_segment, is_impl);
 
@@ -2129,7 +2129,7 @@ impl<'o, 'tcx> dyn AstConv<'tcx> + 'o {
             self_ty,
             trait_segment,
             false,
-            Some(constness),
+            constness,
         );
 
         let item_substs = self.create_substs_for_associated_item(
@@ -2700,7 +2700,7 @@ impl<'o, 'tcx> dyn AstConv<'tcx> + 'o {
                     &GenericArgs::none(),
                     true,
                     None,
-                    None,
+                    ty::BoundConstness::NotConst,
                 );
                 EarlyBinder(self.normalize_ty(span, tcx.at(span).type_of(def_id)))
                     .subst(tcx, substs)

compiler/rustc_resolve/src/late/diagnostics.rs

@@ -322,7 +322,12 @@ impl<'a: 'ast, 'ast> LateResolutionVisitor<'a, '_, 'ast> {
         }
 
         self.suggest_bare_struct_literal(&mut err);
-        self.suggest_pattern_match_with_let(&mut err, source, span);
+
+        if self.suggest_pattern_match_with_let(&mut err, source, span) {
+            // Fallback label.
+            err.span_label(base_error.span, &base_error.fallback_label);
+            return (err, Vec::new());
+        }
 
         self.suggest_self_or_self_ref(&mut err, path, span);
         self.detect_assoct_type_constraint_meant_as_path(&mut err, &base_error);
@@ -341,7 +346,11 @@ impl<'a: 'ast, 'ast> LateResolutionVisitor<'a, '_, 'ast> {
         if !self.type_ascription_suggestion(&mut err, base_error.span) {
             let mut fallback =
                 self.suggest_trait_and_bounds(&mut err, source, res, span, &base_error);
+
+            // if we have suggested using pattern matching, then don't add needless suggestions
+            // for typos.
             fallback |= self.suggest_typo(&mut err, source, path, span, &base_error);
+
             if fallback {
                 // Fallback label.
                 err.span_label(base_error.span, &base_error.fallback_label);
@@ -937,7 +946,7 @@ impl<'a: 'ast, 'ast> LateResolutionVisitor<'a, '_, 'ast> {
         err: &mut Diagnostic,
         source: PathSource<'_>,
         span: Span,
-    ) {
+    ) -> bool {
         if let PathSource::Expr(_) = source &&
         let Some(Expr {
                     span: expr_span,
@@ -954,8 +963,10 @@ impl<'a: 'ast, 'ast> LateResolutionVisitor<'a, '_, 'ast> {
                     "let ",
                     Applicability::MaybeIncorrect,
                 );
+                return true;
             }
         }
+        false
     }
 
     fn get_single_associated_item(

src/bootstrap/builder.rs

@@ -2207,6 +2207,24 @@ impl<'a> Builder<'a> {
 
         false
     }
+
+    pub(crate) fn maybe_open_in_browser<S: Step>(&self, path: impl AsRef<Path>) {
+        if self.was_invoked_explicitly::<S>(Kind::Doc) {
+            self.open_in_browser(path);
+        }
+    }
+
+    pub(crate) fn open_in_browser(&self, path: impl AsRef<Path>) {
+        if self.config.dry_run || !self.config.cmd.open() {
+            return;
+        }
+
+        let path = path.as_ref();
+        self.info(&format!("Opening doc {}", path.display()));
+        if let Err(err) = opener::open(path) {
+            self.info(&format!("{}\n", err));
+        }
+    }
 }
 
 #[cfg(test)]

src/bootstrap/doc.rs

@@ -85,18 +85,6 @@ book!(
     StyleGuide, "src/doc/style-guide", "style-guide";
 );
 
-fn open(builder: &Builder<'_>, path: impl AsRef<Path>) {
-    if builder.config.dry_run || !builder.config.cmd.open() {
-        return;
-    }
-
-    let path = path.as_ref();
-    builder.info(&format!("Opening doc {}", path.display()));
-    if let Err(err) = opener::open(path) {
-        builder.info(&format!("{}\n", err));
-    }
-}
-
 // "library/std" -> ["library", "std"]
 //
 // Used for deciding whether a particular step is one requested by the user on
@@ -240,11 +228,9 @@ impl Step for TheBook {
             invoke_rustdoc(builder, compiler, &shared_assets, target, path);
         }
 
-        if builder.was_invoked_explicitly::<Self>(Kind::Doc) {
-            let out = builder.doc_out(target);
-            let index = out.join("book").join("index.html");
-            open(builder, &index);
-        }
+        let out = builder.doc_out(target);
+        let index = out.join("book").join("index.html");
+        builder.maybe_open_in_browser::<Self>(index);
     }
 }
 
@@ -386,7 +372,7 @@ impl Step for Standalone {
         // with no particular explicit doc requested (e.g. library/core).
         if builder.paths.is_empty() || builder.was_invoked_explicitly::<Self>(Kind::Doc) {
             let index = out.join("index.html");
-            open(builder, &index);
+            builder.open_in_browser(&index);
         }
     }
 }
@@ -507,7 +493,7 @@ impl Step for Std {
         for requested_crate in requested_crates {
             if STD_PUBLIC_CRATES.iter().any(|k| *k == requested_crate.as_str()) {
                 let index = out.join(requested_crate).join("index.html");
-                open(builder, &index);
+                builder.open_in_browser(index);
             }
         }
     }
@@ -759,7 +745,7 @@ impl Step for Rustc {
         // Let's open the first crate documentation page:
         if let Some(krate) = to_open {
             let index = out.join(krate).join("index.html");
-            open(builder, &index);
+            builder.open_in_browser(index);
         }
     }
 }
@@ -1019,10 +1005,9 @@ impl Step for RustcBook {
             name: INTERNER.intern_str("rustc"),
             src: INTERNER.intern_path(out_base),
         });
-        if builder.was_invoked_explicitly::<Self>(Kind::Doc) {
-            let out = builder.doc_out(self.target);
-            let index = out.join("rustc").join("index.html");
-            open(builder, &index);
-        }
+
+        let out = builder.doc_out(self.target);
+        let index = out.join("rustc").join("index.html");
+        builder.maybe_open_in_browser::<Self>(index);
     }
 }

src/librustdoc/config.rs

@@ -239,9 +239,6 @@ pub(crate) struct RenderOptions {
     pub(crate) default_settings: FxHashMap<String, String>,
     /// If present, suffix added to CSS/JavaScript files when referencing them in generated pages.
     pub(crate) resource_suffix: String,
-    /// Whether to run the static CSS/JavaScript through a minifier when outputting them. `true` by
-    /// default.
-    pub(crate) enable_minification: bool,
     /// Whether to create an index page in the root of the output directory. If this is true but
     /// `enable_index_page` is None, generate a static listing of crates instead.
     pub(crate) enable_index_page: bool,
@@ -416,7 +413,9 @@ impl Options {
 
         let to_check = matches.opt_strs("check-theme");
         if !to_check.is_empty() {
-            let paths = match theme::load_css_paths(static_files::themes::LIGHT) {
+            let paths = match theme::load_css_paths(
+                std::str::from_utf8(static_files::STATIC_FILES.theme_light_css.bytes).unwrap(),
+            ) {
                 Ok(p) => p,
                 Err(e) => {
                     diag.struct_err(&e.to_string()).emit();
@@ -557,7 +556,9 @@ impl Options {
 
         let mut themes = Vec::new();
         if matches.opt_present("theme") {
-            let paths = match theme::load_css_paths(static_files::themes::LIGHT) {
+            let paths = match theme::load_css_paths(
+                std::str::from_utf8(static_files::STATIC_FILES.theme_light_css.bytes).unwrap(),
+            ) {
                 Ok(p) => p,
                 Err(e) => {
                     diag.struct_err(&e.to_string()).emit();
@@ -675,7 +676,6 @@ impl Options {
             ModuleSorting::Alphabetical
         };
         let resource_suffix = matches.opt_str("resource-suffix").unwrap_or_default();
-        let enable_minification = !matches.opt_present("disable-minification");
         let markdown_no_toc = matches.opt_present("markdown-no-toc");
         let markdown_css = matches.opt_strs("markdown-css");
         let markdown_playground_url = matches.opt_str("markdown-playground-url");
@@ -768,7 +768,6 @@ impl Options {
             extern_html_root_takes_precedence,
             default_settings,
             resource_suffix,
-            enable_minification,
             enable_index_page,
             index_page,
             static_root_path,

src/librustdoc/html/layout.rs

@@ -2,13 +2,14 @@ use std::path::PathBuf;
 
 use rustc_data_structures::fx::FxHashMap;
 
-use crate::error::Error;
 use crate::externalfiles::ExternalHtml;
 use crate::html::format::{Buffer, Print};
 use crate::html::render::{ensure_trailing_slash, StylePath};
 
 use askama::Template;
 
+use super::static_files::{StaticFiles, STATIC_FILES};
+
 #[derive(Clone)]
 pub(crate) struct Layout {
     pub(crate) logo: String,
@@ -34,17 +35,23 @@ pub(crate) struct Page<'a> {
 }
 
 impl<'a> Page<'a> {
-    pub(crate) fn get_static_root_path(&self) -> &str {
-        self.static_root_path.unwrap_or(self.root_path)
+    pub(crate) fn get_static_root_path(&self) -> String {
+        match self.static_root_path {
+            Some(s) => s.to_string(),
+            None => format!("{}static.files/", self.root_path),
+        }
     }
 }
 
 #[derive(Template)]
 #[template(path = "page.html")]
 struct PageLayout<'a> {
-    static_root_path: &'a str,
+    static_root_path: String,
     page: &'a Page<'a>,
     layout: &'a Layout,
+
+    files: &'static StaticFiles,
+
     themes: Vec<String>,
     sidebar: String,
     content: String,
@@ -61,19 +68,17 @@ pub(crate) fn render<T: Print, S: Print>(
 ) -> String {
     let static_root_path = page.get_static_root_path();
     let krate_with_trailing_slash = ensure_trailing_slash(&layout.krate).to_string();
-    let mut themes: Vec<String> = style_files
-        .iter()
-        .map(StylePath::basename)
-        .collect::<Result<_, Error>>()
-        .unwrap_or_default();
+    let mut themes: Vec<String> = style_files.iter().map(|s| s.basename().unwrap()).collect();
     themes.sort();
+
     let rustdoc_version = rustc_interface::util::version_str().unwrap_or("unknown version");
     let content = Buffer::html().to_display(t); // Note: This must happen before making the sidebar.
     let sidebar = Buffer::html().to_display(sidebar);
     PageLayout {
         static_root_path,
         page,
         layout,
+        files: &STATIC_FILES,
         themes,
         sidebar,
         content,