Auto merge of #102644 - matthiaskrgr:rollup-rg0sw41, r=matthiaskrgr

Rollup of 7 pull requests

Successful merges:

 - #102441 (Suggest unwrap_or_else when a closure is given)
 - #102547 (Migrate CSS theme for search results)
 - #102567 (Delay evaluating lint primary message until after it would be suppressed)
 - #102624 (rustdoc: remove font family CSS on `.rustdoc-toggle summary::before`)
 - #102628 (Change the parameter name of From::from to `value`)
 - #102637 (Ignore fuchsia on two compiler tests)
 - #102639 (Improve spans when splitting multi-char operator tokens for proc macros.)

Failed merges:

 - #102496 (Suggest `.into()` when all other coercion suggestions fail)

r? `@ghost`
`@rustbot` modify labels: rollup

Author: bors

Diff for: compiler/rustc_expand/src/proc_macro_server.rs

@@ -115,8 +115,20 @@ impl FromInternal<(TokenStream, &mut Rustc<'_, '_>)> for Vec<TokenTree<TokenStre
             // before that get `joint = true`.
             let mut op = |s: &str| {
                 assert!(s.is_ascii());
-                trees.extend(s.bytes().enumerate().map(|(idx, ch)| {
-                    let is_final = idx == s.len() - 1;
+                trees.extend(s.bytes().enumerate().map(|(i, ch)| {
+                    let is_final = i == s.len() - 1;
+                    // Split the token span into single chars. Unless the span
+                    // is an unusual one, e.g. due to proc macro expansion. We
+                    // determine this by assuming any span with a length that
+                    // matches the operator length is a normal one, and any
+                    // span with a different length is an unusual one.
+                    let span = if (span.hi() - span.lo()).to_usize() == s.len() {
+                        let lo = span.lo() + BytePos::from_usize(i);
+                        let hi = lo + BytePos::from_usize(1);
+                        span.with_lo(lo).with_hi(hi)
+                    } else {
+                        span
+                    };
                     TokenTree::Punct(Punct { ch, joint: if is_final { joint } else { true }, span })
                 }));
             };

Diff for: compiler/rustc_hir_analysis/src/check/fn_ctxt/suggestions.rs

@@ -65,7 +65,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
     }
 
     /// When encountering an fn-like type, try accessing the output of the type
-    /// // and suggesting calling it if it satisfies a predicate (i.e. if the
+    /// and suggesting calling it if it satisfies a predicate (i.e. if the
     /// output has a method or a field):
     /// ```compile_fail,E0308
     /// fn foo(x: usize) -> usize { x }
@@ -139,7 +139,6 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
                 sugg,
                 applicability,
             );
-
             return true;
         }
         false
@@ -338,6 +337,8 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
             } else {
                 err.span_suggestion(sp, &msg, suggestion, applicability);
             }
+        } else if self.suggest_else_fn_with_closure(err, expr, found, expected)
+        {
         } else if self.suggest_fn_call(err, expr, found, |output| self.can_coerce(output, expected))
             && let ty::FnDef(def_id, ..) = &found.kind()
             && let Some(sp) = self.tcx.hir().span_if_local(*def_id)

Diff for: compiler/rustc_hir_analysis/src/check/method/suggest.rs

@@ -2324,6 +2324,60 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
         }
     }
 
+    /// issue #102320, for `unwrap_or` with closure as argument, suggest `unwrap_or_else`
+    /// FIXME: currently not working for suggesting `map_or_else`, see #102408
+    pub(crate) fn suggest_else_fn_with_closure(
+        &self,
+        err: &mut Diagnostic,
+        expr: &hir::Expr<'_>,
+        found: Ty<'tcx>,
+        expected: Ty<'tcx>,
+    ) -> bool {
+        let Some((_def_id_or_name, output, _inputs)) = self.extract_callable_info(expr, found)
+        else { return false; };
+
+        if !self.can_coerce(output, expected) {
+            return false;
+        }
+
+        let parent = self.tcx.hir().get_parent_node(expr.hir_id);
+        if  let Some(Node::Expr(call_expr)) = self.tcx.hir().find(parent) &&
+            let hir::ExprKind::MethodCall(
+                hir::PathSegment { ident: method_name, .. },
+                self_expr,
+                args,
+                ..,
+             ) = call_expr.kind &&
+            let Some(self_ty) = self.typeck_results.borrow().expr_ty_opt(self_expr) {
+            let new_name = Ident {
+                name: Symbol::intern(&format!("{}_else", method_name.as_str())),
+                span: method_name.span,
+            };
+            let probe = self.lookup_probe(
+                expr.span,
+                new_name,
+                self_ty,
+                self_expr,
+                ProbeScope::TraitsInScope,
+            );
+
+            // check the method arguments number
+            if let Ok(pick) = probe &&
+                let fn_sig = self.tcx.fn_sig(pick.item.def_id) &&
+                let fn_args = fn_sig.skip_binder().inputs() &&
+                fn_args.len() == args.len() + 1 {
+                err.span_suggestion_verbose(
+                    method_name.span.shrink_to_hi(),
+                    &format!("try calling `{}` instead", new_name.name.as_str()),
+                    "_else",
+                    Applicability::MaybeIncorrect,
+                );
+                return true;
+            }
+        }
+        false
+    }
+
     /// Checks whether there is a local type somewhere in the chain of
     /// autoderefs of `rcvr_ty`.
     fn type_derefs_to_local(

Diff for: compiler/rustc_middle/src/lint.rs

@@ -350,7 +350,6 @@ pub fn struct_lint_level(
             (Level::Deny | Level::Forbid, None) => sess.diagnostic().struct_err_lint(""),
         };
 
-        err.set_primary_message(msg);
         err.set_is_lint();
 
         // If this code originates in a foreign macro, aka something that this crate
@@ -375,6 +374,10 @@ pub fn struct_lint_level(
             }
         }
 
+        // Delay evaluating and setting the primary message until after we've
+        // suppressed the lint due to macros.
+        err.set_primary_message(msg);
+
         // Lint diagnostics that are covered by the expect level will not be emitted outside
         // the compiler. It is therefore not necessary to add any information for the user.
         // This will therefore directly call the decorate function which will in turn emit

Diff for: library/core/src/convert/mod.rs

@@ -545,7 +545,7 @@ pub trait From<T>: Sized {
     #[lang = "from"]
     #[must_use]
     #[stable(feature = "rust1", since = "1.0.0")]
-    fn from(_: T) -> Self;
+    fn from(value: T) -> Self;
 }
 
 /// An attempted conversion that consumes `self`, which may or may not be

Diff for: src/librustdoc/html/static/css/rustdoc.css

@@ -194,13 +194,10 @@ h1, h2, h3, h4, h5, h6,
 .item-left > a,
 .out-of-band,
 span.since,
-details.rustdoc-toggle > summary::before,
 a.srclink,
 #help-button > button,
 details.rustdoc-toggle.top-doc > summary,
-details.rustdoc-toggle.top-doc > summary::before,
 details.rustdoc-toggle.non-exhaustive > summary,
-details.rustdoc-toggle.non-exhaustive > summary::before,
 .scraped-example-title,
 .more-examples-toggle summary, .more-examples-toggle .hide-more,
 .example-links a,
@@ -970,6 +967,11 @@ so that we can apply CSS-filters to change the arrow color in themes */
 	padding-right: 1em;
 }
 
+.search-results a:hover,
+.search-results a:focus {
+	background-color: var(--search-result-link-focus-background-color);
+}
+
 .popover {
 	font-size: 1rem;
 	position: absolute;
@@ -1567,7 +1569,6 @@ details.rustdoc-toggle > summary::before {
 }
 
 details.rustdoc-toggle > summary.hideme > span,
-details.rustdoc-toggle > summary::before,
 .more-examples-toggle summary, .more-examples-toggle .hide-more {
 	color: var(--toggles-color);
 }

Diff for: src/librustdoc/html/static/css/themes/ayu.css

@@ -37,6 +37,7 @@ Original by Dempfi (https://github.com/dempfi/ayu)
 	--link-color: #39afd7;
 	--sidebar-link-color: #53b1db;
 	--sidebar-current-link-background-color: transparent;
+	--search-result-link-focus-background-color: #3c3c3c;
 	--stab-background-color: #314559;
 	--stab-code-color: #e6e1cf;
 }
@@ -250,30 +251,6 @@ pre.rust .kw {}
 pre.rust .self, pre.rust .bool-val, pre.rust .prelude-val, pre.rust .attribute {}
 pre.rust .kw-2, pre.rust .prelude-ty {}
 
-.search-results a:focus span {}
-a.result-trait:focus {}
-a.result-traitalias:focus {}
-a.result-mod:focus,
-a.result-externcrate:focus {}
-a.result-mod:focus {}
-a.result-externcrate:focus {}
-a.result-enum:focus {}
-a.result-struct:focus {}
-a.result-union:focus {}
-a.result-fn:focus,
-a.result-method:focus,
-a.result-tymethod:focus {}
-a.result-type:focus {}
-a.result-associatedtype:focus {}
-a.result-foreigntype:focus {}
-a.result-attr:focus,
-a.result-derive:focus,
-a.result-macro:focus {}
-a.result-constant:focus,
-a.result-static:focus {}
-a.result-primitive:focus {}
-a.result-keyword:focus {}
-
 kbd {
 	color: #c5c5c5;
 	background-color: #314559;

Diff for: src/librustdoc/html/static/css/themes/dark.css

@@ -32,6 +32,7 @@
 	--link-color: #d2991d;
 	--sidebar-link-color: #fdbf35;
 	--sidebar-current-link-background-color: #444;
+	--search-result-link-focus-background-color: #616161;
 	--stab-background-color: #314559;
 	--stab-code-color: #e6e1cf;
 }
@@ -58,36 +59,6 @@ input:focus + .slider {
 	background-color: #0a042f !important;
 }
 
-.search-results a:hover {
-	background-color: #777;
-}
-
-.search-results a:focus {
-	color: #eee !important;
-	background-color: #616161;
-}
-.search-results a:focus span { color: #eee !important; }
-a.result-trait:focus { background-color: #013191; }
-a.result-traitalias:focus { background-color: #013191; }
-a.result-mod:focus,
-a.result-externcrate:focus { background-color: #884719; }
-a.result-enum:focus { background-color: #194e9f; }
-a.result-struct:focus { background-color: #194e9f; }
-a.result-union:focus { background-color: #194e9f; }
-a.result-fn:focus,
-a.result-method:focus,
-a.result-tymethod:focus { background-color: #4950ed; }
-a.result-type:focus { background-color: #194e9f; }
-a.result-associatedtype:focus { background-color: #884719; }
-a.result-foreigntype:focus { background-color: #194e9f; }
-a.result-attr:focus,
-a.result-derive:focus,
-a.result-macro:focus { background-color: #217d1c; }
-a.result-constant:focus,
-a.result-static:focus { background-color: #884719; }
-a.result-primitive:focus { background-color: #194e9f; }
-a.result-keyword:focus { background-color: #884719; }
-
 .content .item-info::before { color: #ccc; }
 
 pre.rust .comment { color: #8d8d8b; }

Diff for: src/librustdoc/html/static/css/themes/light.css

@@ -32,6 +32,7 @@
 	--link-color: #3873ad;
 	--sidebar-link-color: #356da4;
 	--sidebar-current-link-background-color: #fff;
+	--search-result-link-focus-background-color: #ccc;
 	--stab-background-color: #fff5d6;
 	--stab-code-color: #000;
 }
@@ -57,36 +58,6 @@ input:focus + .slider {
 	background-color: #FDFFD3 !important;
 }
 
-.search-results a:hover {
-	background-color: #ddd;
-}
-
-.search-results a:focus {
-	color: #000 !important;
-	background-color: #ccc;
-}
-.search-results a:focus span { color: #000 !important; }
-a.result-trait:focus { background-color: #c7b6ff; }
-a.result-traitalias:focus { background-color: #c7b6ff; }
-a.result-mod:focus,
-a.result-externcrate:focus { background-color: #afc6e4; }
-a.result-enum:focus { background-color: #e7b1a0; }
-a.result-struct:focus { background-color: #e7b1a0; }
-a.result-union:focus { background-color: #e7b1a0; }
-a.result-fn:focus,
-a.result-method:focus,
-a.result-tymethod:focus { background-color: #c6afb3; }
-a.result-type:focus { background-color: #e7b1a0; }
-a.result-associatedtype:focus { background-color: #afc6e4; }
-a.result-foreigntype:focus { background-color: #e7b1a0; }
-a.result-attr:focus,
-a.result-derive:focus,
-a.result-macro:focus { background-color: #8ce488; }
-a.result-constant:focus,
-a.result-static:focus { background-color: #afc6e4; }
-a.result-primitive:focus { background-color: #e7b1a0; }
-a.result-keyword:focus { background-color: #afc6e4; }
-
 .content .item-info::before { color: #ccc; }
 
 body.source .example-wrap pre.rust a {