Auto merge of #97654 - Dylan-DPC:rollup-w6zrzxf, r=Dylan-DPC

Rollup of 5 pull requests

Successful merges:

 - #97420 (Be a little nicer with casts when formatting `fn` pointers)
 - #97450 ([RFC 2011] Basic compiler infrastructure)
 - #97599 (Fix JSON reexport ICE)
 - #97617 (Rustdoc anonymous reexports)
 - #97636 (Revert #96682.)

Failed merges:

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

compiler/rustc_ast/src/token.rs

@@ -50,12 +50,11 @@ pub enum Delimiter {
     Brace,
     /// `[ ... ]`
     Bracket,
-    /// `/*«*/ ... /*»*/`
+    /// `Ø ... Ø`
     /// An invisible delimiter, that may, for example, appear around tokens coming from a
     /// "macro variable" `$var`. It is important to preserve operator priorities in cases like
     /// `$var * 3` where `$var` is `1 + 2`.
-    /// Invisible delimiters are not directly writable in normal Rust code except as comments.
+    /// Invisible delimiters might not survive roundtrip of a token stream through a string.
-    /// Therefore, they might not survive a roundtrip of a token stream through a string.
     Invisible,
 }
 

compiler/rustc_ast_pretty/src/pprust/state.rs

@@ -590,29 +590,15 @@ pub trait PrintState<'a>: std::ops::Deref<Target = pp::Printer> + std::ops::Dere
                     self.nbsp();
                 }
                 self.word("{");
-                let empty = tts.is_empty();
+                if !tts.is_empty() {
-                if !empty {
                     self.space();
                 }
                 self.ibox(0);
                 self.print_tts(tts, convert_dollar_crate);
                 self.end();
+                let empty = tts.is_empty();
                 self.bclose(span, empty);
             }
-            Some(Delimiter::Invisible) => {
-                self.word("/*«*/");
-                let empty = tts.is_empty();
-                if !empty {
-                    self.space();
-                }
-                self.ibox(0);
-                self.print_tts(tts, convert_dollar_crate);
-                self.end();
-                if !empty {
-                    self.space();
-                }
-                self.word("/*»*/");
-            }
             Some(delim) => {
                 let token_str = self.token_kind_to_string(&token::OpenDelim(delim));
                 self.word(token_str);
@@ -786,8 +772,9 @@ pub trait PrintState<'a>: std::ops::Deref<Target = pp::Printer> + std::ops::Dere
             token::CloseDelim(Delimiter::Bracket) => "]".into(),
             token::OpenDelim(Delimiter::Brace) => "{".into(),
             token::CloseDelim(Delimiter::Brace) => "}".into(),
-            token::OpenDelim(Delimiter::Invisible) => "/*«*/".into(),
+            token::OpenDelim(Delimiter::Invisible) | token::CloseDelim(Delimiter::Invisible) => {
-            token::CloseDelim(Delimiter::Invisible) => "/*»*/".into(),
+                "".into()
+            }
             token::Pound => "#".into(),
             token::Dollar => "$".into(),
             token::Question => "?".into(),

compiler/rustc_builtin_macros/src/assert.rs

@@ -1,11 +1,13 @@
+mod context;
+
 use crate::edition_panic::use_panic_2021;
 use rustc_ast::ptr::P;
 use rustc_ast::token;
 use rustc_ast::tokenstream::{DelimSpan, TokenStream};
-use rustc_ast::{self as ast, *};
+use rustc_ast::{Expr, ExprKind, MacArgs, MacCall, MacDelimiter, Path, PathSegment, UnOp};
 use rustc_ast_pretty::pprust;
 use rustc_errors::{Applicability, PResult};
-use rustc_expand::base::*;
+use rustc_expand::base::{DummyResult, ExtCtxt, MacEager, MacResult};
 use rustc_parse::parser::Parser;
 use rustc_span::symbol::{sym, Ident, Symbol};
 use rustc_span::{Span, DUMMY_SP};
@@ -25,13 +27,13 @@ pub fn expand_assert<'cx>(
 
     // `core::panic` and `std::panic` are different macros, so we use call-site
     // context to pick up whichever is currently in scope.
-    let sp = cx.with_call_site_ctxt(span);
+    let call_site_span = cx.with_call_site_ctxt(span);
 
-    let panic_call = if let Some(tokens) = custom_message {
+    let panic_path = || {
-        let path = if use_panic_2021(span) {
+        if use_panic_2021(span) {
             // On edition 2021, we always call `$crate::panic::panic_2021!()`.
             Path {
-                span: sp,
+                span: call_site_span,
                 segments: cx
                     .std_path(&[sym::panic, sym::panic_2021])
                     .into_iter()
@@ -42,27 +44,40 @@ pub fn expand_assert<'cx>(
         } else {
             // Before edition 2021, we call `panic!()` unqualified,
             // such that it calls either `std::panic!()` or `core::panic!()`.
-            Path::from_ident(Ident::new(sym::panic, sp))
+            Path::from_ident(Ident::new(sym::panic, call_site_span))
+        }
     };
-        // Pass the custom message to panic!().
+
-        cx.expr(
+    // Simply uses the user provided message instead of generating custom outputs
-            sp,
+    let expr = if let Some(tokens) = custom_message {
+        let then = cx.expr(
+            call_site_span,
             ExprKind::MacCall(MacCall {
-                path,
+                path: panic_path(),
                 args: P(MacArgs::Delimited(
-                    DelimSpan::from_single(sp),
+                    DelimSpan::from_single(call_site_span),
                     MacDelimiter::Parenthesis,
                     tokens,
                 )),
                 prior_type_ascription: None,
             }),
-        )
+        );
-    } else {
+        expr_if_not(cx, call_site_span, cond_expr, then, None)
+    }
+    // If `generic_assert` is enabled, generates rich captured outputs
+    //
+    // FIXME(c410-f3r) See https://github.com/rust-lang/rust/issues/96949
+    else if let Some(features) = cx.ecfg.features && features.generic_assert {
+        context::Context::new(cx, call_site_span).build(cond_expr, panic_path())
+    }
+    // If `generic_assert` is not enabled, only outputs a literal "assertion failed: ..."
+    // string
+    else {
         // Pass our own message directly to $crate::panicking::panic(),
         // because it might contain `{` and `}` that should always be
         // passed literally.
-        cx.expr_call_global(
+        let then = cx.expr_call_global(
-            sp,
+            call_site_span,
             cx.std_path(&[sym::panicking, sym::panic]),
             vec![cx.expr_str(
                 DUMMY_SP,
@@ -71,18 +86,29 @@ pub fn expand_assert<'cx>(
                     pprust::expr_to_string(&cond_expr).escape_debug()
                 )),
             )],
-        )
+        );
+        expr_if_not(cx, call_site_span, cond_expr, then, None)
     };
-    let if_expr =
+
-        cx.expr_if(sp, cx.expr(sp, ExprKind::Unary(UnOp::Not, cond_expr)), panic_call, None);
+    MacEager::expr(expr)
-    MacEager::expr(if_expr)
 }
 
 struct Assert {
-    cond_expr: P<ast::Expr>,
+    cond_expr: P<Expr>,
     custom_message: Option<TokenStream>,
 }
 
+// if !{ ... } { ... } else { ... }
+fn expr_if_not(
+    cx: &ExtCtxt<'_>,
+    span: Span,
+    cond: P<Expr>,
+    then: P<Expr>,
+    els: Option<P<Expr>>,
+) -> P<Expr> {
+    cx.expr_if(span, cx.expr(span, ExprKind::Unary(UnOp::Not, cond)), then, els)
+}
+
 fn parse_assert<'a>(cx: &mut ExtCtxt<'a>, sp: Span, stream: TokenStream) -> PResult<'a, Assert> {
     let mut parser = cx.new_parser_from_tts(stream);
 

compiler/rustc_builtin_macros/src/assert/context.rs

@@ -0,0 +1,44 @@
+use rustc_ast::{ptr::P, Expr, Path};
+use rustc_expand::base::ExtCtxt;
+use rustc_span::Span;
+
+pub(super) struct Context<'cx, 'a> {
+    cx: &'cx ExtCtxt<'a>,
+    span: Span,
+}
+
+impl<'cx, 'a> Context<'cx, 'a> {
+    pub(super) fn new(cx: &'cx ExtCtxt<'a>, span: Span) -> Self {
+        Self { cx, span }
+    }
+
+    /// Builds the whole `assert!` expression.
+    ///
+    /// {
+    ///    use ::core::asserting::{ ... };
+    ///
+    ///    let mut __capture0 = Capture::new();
+    ///    ...
+    ///    ...
+    ///    ...
+    ///
+    ///    if !{
+    ///       ...
+    ///       ...
+    ///       ...
+    ///    } {
+    ///        panic!(
+    ///            "Assertion failed: ... \n With expansion: ...",
+    ///            __capture0,
+    ///            ...
+    ///            ...
+    ///            ...
+    ///        );
+    ///    }
+    /// }
+    pub(super) fn build(self, _cond_expr: P<Expr>, _panic_path: Path) -> P<Expr> {
+        let Self { cx, span, .. } = self;
+        let stmts = Vec::new();
+        cx.expr_block(cx.block(span, stmts))
+    }
+}

compiler/rustc_builtin_macros/src/lib.rs

@@ -1,17 +1,18 @@
 //! This crate contains implementations of built-in macros and other code generating facilities
 //! injecting code into the crate before it is lowered to HIR.
 
+#![allow(rustc::potential_query_instability)]
 #![doc(html_root_url = "https://doc.rust-lang.org/nightly/nightly-rustc/")]
 #![feature(array_windows)]
 #![feature(box_patterns)]
 #![feature(decl_macro)]
 #![feature(is_sorted)]
-#![feature(nll)]
+#![feature(let_chains)]
 #![feature(let_else)]
+#![feature(nll)]
 #![feature(proc_macro_internals)]
 #![feature(proc_macro_quote)]
 #![recursion_limit = "256"]
-#![allow(rustc::potential_query_instability)]
 
 extern crate proc_macro;
 

compiler/rustc_expand/src/build.rs

@@ -160,7 +160,7 @@ impl<'a> ExtCtxt<'a> {
             attrs: AttrVec::new(),
             tokens: None,
         });
-        ast::Stmt { id: ast::DUMMY_NODE_ID, kind: ast::StmtKind::Local(local), span: sp }
+        self.stmt_local(local, sp)
     }
 
     // Generates `let _: Type;`, which is usually used for type assertions.
@@ -174,6 +174,10 @@ impl<'a> ExtCtxt<'a> {
             attrs: AttrVec::new(),
             tokens: None,
         });
+        self.stmt_local(local, span)
+    }
+
+    pub fn stmt_local(&self, local: P<ast::Local>, span: Span) -> ast::Stmt {
         ast::Stmt { id: ast::DUMMY_NODE_ID, kind: ast::StmtKind::Local(local), span }
     }
 

compiler/rustc_feature/src/active.rs

@@ -150,6 +150,8 @@ declare_features! (
     (active, allow_internal_unstable, "1.0.0", None, None),
     /// Allows identifying the `compiler_builtins` crate.
     (active, compiler_builtins, "1.13.0", None, None),
+    /// Outputs useful `assert!` messages
+    (active, generic_assert, "1.63.0", None, None),
     /// Allows using the `rust-intrinsic`'s "ABI".
     (active, intrinsics, "1.0.0", None, None),
     /// Allows using `#[lang = ".."]` attribute for linking items to special compiler logic.

compiler/rustc_span/src/symbol.rs

@@ -733,6 +733,7 @@ symbols! {
         generator_state,
         generators,
         generic_arg_infer,
+        generic_assert,
         generic_associated_types,
         generic_associated_types_extended,
         generic_const_exprs,

library/core/src/fmt/mod.rs

@@ -2233,9 +2233,19 @@ impl Display for char {
 #[stable(feature = "rust1", since = "1.0.0")]
 impl<T: ?Sized> Pointer for *const T {
     fn fmt(&self, f: &mut Formatter<'_>) -> Result {
+        // Cast is needed here because `.addr()` requires `T: Sized`.
+        pointer_fmt_inner((*self as *const ()).addr(), f)
+    }
+}
+
 /// Since the formatting will be identical for all pointer types, use a non-monomorphized
-        /// implementation for the actual formatting to reduce the amount of codegen work needed
+/// implementation for the actual formatting to reduce the amount of codegen work needed.
-        fn inner(ptr: *const (), f: &mut Formatter<'_>) -> Result {
+///
+/// This uses `ptr_addr: usize` and not `ptr: *const ()` to be able to use this for
+/// `fn(...) -> ...` without using [problematic] "Oxford Casts".
+///
+/// [problematic]: https://github.com/rust-lang/rust/issues/95489
+pub(crate) fn pointer_fmt_inner(ptr_addr: usize, f: &mut Formatter<'_>) -> Result {
     let old_width = f.width;
     let old_flags = f.flags;
 
@@ -2252,7 +2262,7 @@ impl<T: ?Sized> Pointer for *const T {
     }
     f.flags |= 1 << (FlagV1::Alternate as u32);
 
-            let ret = LowerHex::fmt(&(ptr.addr()), f);
+    let ret = LowerHex::fmt(&ptr_addr, f);
 
     f.width = old_width;
     f.flags = old_flags;
@@ -2260,10 +2270,6 @@ impl<T: ?Sized> Pointer for *const T {
     ret
 }
 
-        inner(*self as *const (), f)
-    }
-}
-
 #[stable(feature = "rust1", since = "1.0.0")]
 impl<T: ?Sized> Pointer for *mut T {
     fn fmt(&self, f: &mut Formatter<'_>) -> Result {

library/core/src/ptr/mod.rs

@@ -1878,24 +1878,14 @@ macro_rules! fnptr_impls_safety_abi {
         #[stable(feature = "fnptr_impls", since = "1.4.0")]
         impl<Ret, $($Arg),*> fmt::Pointer for $FnTy {
             fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-                // HACK: The intermediate cast as usize is required for AVR
+                fmt::pointer_fmt_inner(*self as usize, f)
-                // so that the address space of the source function pointer
-                // is preserved in the final function pointer.
-                //
-                // https://github.com/avr-rust/rust/issues/143
-                fmt::Pointer::fmt(&(*self as usize as *const ()), f)
             }
         }
 
         #[stable(feature = "fnptr_impls", since = "1.4.0")]
         impl<Ret, $($Arg),*> fmt::Debug for $FnTy {
             fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-                // HACK: The intermediate cast as usize is required for AVR
+                fmt::pointer_fmt_inner(*self as usize, f)
-                // so that the address space of the source function pointer
-                // is preserved in the final function pointer.
-                //
-                // https://github.com/avr-rust/rust/issues/143
-                fmt::Pointer::fmt(&(*self as usize as *const ()), f)
             }
         }
     }

library/proc_macro/src/lib.rs

@@ -703,12 +703,11 @@ pub enum Delimiter {
     /// `[ ... ]`
     #[stable(feature = "proc_macro_lib2", since = "1.29.0")]
     Bracket,
-    /// `/*«*/ ... /*»*/`
+    /// `Ø ... Ø`
     /// An invisible delimiter, that may, for example, appear around tokens coming from a
     /// "macro variable" `$var`. It is important to preserve operator priorities in cases like
     /// `$var * 3` where `$var` is `1 + 2`.
-    /// Invisible delimiters are not directly writable in normal Rust code except as comments.
+    /// Invisible delimiters might not survive roundtrip of a token stream through a string.
-    /// Therefore, they might not survive a roundtrip of a token stream through a string.
     #[stable(feature = "proc_macro_lib2", since = "1.29.0")]
     None,
 }

src/librustdoc/json/conversions.rs

@@ -10,7 +10,7 @@ use std::fmt;
 use rustc_ast::ast;
 use rustc_hir::{def::CtorKind, def_id::DefId};
 use rustc_middle::ty::{self, TyCtxt};
-use rustc_span::Pos;
+use rustc_span::{Pos, Symbol};
 use rustc_target::spec::abi::Abi as RustcAbi;
 
 use rustdoc_json_types::*;
@@ -29,7 +29,9 @@ impl JsonRenderer<'_> {
             .get(&item.item_id)
             .into_iter()
             .flatten()
-            .map(|clean::ItemLink { link, did, .. }| (link.clone(), from_item_id((*did).into())))
+            .map(|clean::ItemLink { link, did, .. }| {
+                (link.clone(), from_item_id((*did).into(), self.tcx))
+            })
             .collect();
         let docs = item.attrs.collapsed_doc_value();
         let attrs = item
@@ -45,7 +47,7 @@ impl JsonRenderer<'_> {
             _ => from_clean_item(item, self.tcx),
         };
         Some(Item {
-            id: from_item_id(item_id),
+            id: from_item_id_with_name(item_id, self.tcx, name),
             crate_id: item_id.krate().as_u32(),
             name: name.map(|sym| sym.to_string()),
             span: self.convert_span(span),
@@ -84,7 +86,7 @@ impl JsonRenderer<'_> {
             Inherited => Visibility::Default,
             Restricted(did) if did.is_crate_root() => Visibility::Crate,
             Restricted(did) => Visibility::Restricted {
-                parent: from_item_id(did.into()),
+                parent: from_item_id(did.into(), self.tcx),
                 path: self.tcx.def_path(did).to_string_no_crate_verbose(),
             },
         }
@@ -173,22 +175,39 @@ impl FromWithTcx<clean::TypeBindingKind> for TypeBindingKind {
     }
 }
 
-pub(crate) fn from_item_id(item_id: ItemId) -> Id {
+/// It generates an ID as follows:
-    struct DisplayDefId(DefId);
+///
+/// `CRATE_ID:ITEM_ID[:NAME_ID]` (if there is no name, NAME_ID is not generated).
+pub(crate) fn from_item_id(item_id: ItemId, tcx: TyCtxt<'_>) -> Id {
+    from_item_id_with_name(item_id, tcx, None)
+}
 
-    impl fmt::Display for DisplayDefId {
+// FIXME: this function (and appending the name at the end of the ID) should be removed when
+// reexports are not inlined anymore for json format. It should be done in #93518.
+pub(crate) fn from_item_id_with_name(item_id: ItemId, tcx: TyCtxt<'_>, name: Option<Symbol>) -> Id {
+    struct DisplayDefId<'a>(DefId, TyCtxt<'a>, Option<Symbol>);
+
+    impl<'a> fmt::Display for DisplayDefId<'a> {
         fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-            write!(f, "{}:{}", self.0.krate.as_u32(), u32::from(self.0.index))
+            let name = match self.2 {
+                Some(name) => format!(":{}", name.as_u32()),
+                None => self
+                    .1
+                    .opt_item_name(self.0)
+                    .map(|n| format!(":{}", n.as_u32()))
+                    .unwrap_or_default(),
+            };
+            write!(f, "{}:{}{}", self.0.krate.as_u32(), u32::from(self.0.index), name)
         }
     }
 
     match item_id {
-        ItemId::DefId(did) => Id(format!("{}", DisplayDefId(did))),
+        ItemId::DefId(did) => Id(format!("{}", DisplayDefId(did, tcx, name))),
         ItemId::Blanket { for_, impl_id } => {
-            Id(format!("b:{}-{}", DisplayDefId(impl_id), DisplayDefId(for_)))
+            Id(format!("b:{}-{}", DisplayDefId(impl_id, tcx, None), DisplayDefId(for_, tcx, name)))
         }
         ItemId::Auto { for_, trait_ } => {
-            Id(format!("a:{}-{}", DisplayDefId(trait_), DisplayDefId(for_)))
+            Id(format!("a:{}-{}", DisplayDefId(trait_, tcx, None), DisplayDefId(for_, tcx, name)))
         }
         ItemId::Primitive(ty, krate) => Id(format!("p:{}:{}", krate.as_u32(), ty.as_sym())),
     }
@@ -201,7 +220,7 @@ fn from_clean_item(item: clean::Item, tcx: TyCtxt<'_>) -> ItemEnum {
     let header = item.fn_header(tcx);
 
     match *item.kind {
-        ModuleItem(m) => ItemEnum::Module(Module { is_crate, items: ids(m.items) }),
+        ModuleItem(m) => ItemEnum::Module(Module { is_crate, items: ids(m.items, tcx) }),
         ImportItem(i) => ItemEnum::Import(i.into_tcx(tcx)),
         StructItem(s) => ItemEnum::Struct(s.into_tcx(tcx)),
         UnionItem(u) => ItemEnum::Union(u.into_tcx(tcx)),
@@ -255,7 +274,7 @@ impl FromWithTcx<clean::Struct> for Struct {
             struct_type: from_ctor_kind(struct_type),
             generics: generics.into_tcx(tcx),
             fields_stripped,
-            fields: ids(fields),
+            fields: ids(fields, tcx),
             impls: Vec::new(), // Added in JsonRenderer::item
         }
     }
@@ -268,7 +287,7 @@ impl FromWithTcx<clean::Union> for Union {
         Union {
             generics: generics.into_tcx(tcx),
             fields_stripped,
-            fields: ids(fields),
+            fields: ids(fields, tcx),
             impls: Vec::new(), // Added in JsonRenderer::item
         }
     }
@@ -413,7 +432,7 @@ impl FromWithTcx<clean::Type> for Type {
         match ty {
             clean::Type::Path { path } => Type::ResolvedPath {
                 name: path.whole_name(),
-                id: from_item_id(path.def_id().into()),
+                id: from_item_id(path.def_id().into(), tcx),
                 args: path.segments.last().map(|args| Box::new(args.clone().args.into_tcx(tcx))),
                 param_names: Vec::new(),
             },
@@ -422,7 +441,7 @@ impl FromWithTcx<clean::Type> for Type {
 
                 Type::ResolvedPath {
                     name: first_trait.whole_name(),
-                    id: from_item_id(first_trait.def_id().into()),
+                    id: from_item_id(first_trait.def_id().into(), tcx),
                     args: first_trait
                         .segments
                         .last()
@@ -517,7 +536,7 @@ impl FromWithTcx<clean::Trait> for Trait {
         Trait {
             is_auto,
             is_unsafe: unsafety == rustc_hir::Unsafety::Unsafe,
-            items: ids(items),
+            items: ids(items, tcx),
             generics: generics.into_tcx(tcx),
             bounds: bounds.into_iter().map(|x| x.into_tcx(tcx)).collect(),
             implementations: Vec::new(), // Added in JsonRenderer::item
@@ -550,7 +569,7 @@ impl FromWithTcx<clean::Impl> for Impl {
                 .collect(),
             trait_,
             for_: for_.into_tcx(tcx),
-            items: ids(items),
+            items: ids(items, tcx),
             negative: negative_polarity,
             synthetic,
             blanket_impl: blanket_impl.map(|x| x.into_tcx(tcx)),
@@ -593,21 +612,21 @@ impl FromWithTcx<clean::Enum> for Enum {
         Enum {
             generics: generics.into_tcx(tcx),
             variants_stripped,
-            variants: ids(variants),
+            variants: ids(variants, tcx),
             impls: Vec::new(), // Added in JsonRenderer::item
         }
     }
 }
 
 impl FromWithTcx<clean::VariantStruct> for Struct {
-    fn from_tcx(struct_: clean::VariantStruct, _tcx: TyCtxt<'_>) -> Self {
+    fn from_tcx(struct_: clean::VariantStruct, tcx: TyCtxt<'_>) -> Self {
         let fields_stripped = struct_.has_stripped_entries();
         let clean::VariantStruct { struct_type, fields } = struct_;
         Struct {
             struct_type: from_ctor_kind(struct_type),
             generics: Default::default(),
             fields_stripped,
-            fields: ids(fields),
+            fields: ids(fields, tcx),
             impls: Vec::new(),
         }
     }
@@ -630,25 +649,25 @@ impl FromWithTcx<clean::Variant> for Variant {
                     })
                     .collect(),
             ),
-            Struct(s) => Variant::Struct(ids(s.fields)),
+            Struct(s) => Variant::Struct(ids(s.fields, tcx)),
         }
     }
 }
 
 impl FromWithTcx<clean::Import> for Import {
-    fn from_tcx(import: clean::Import, _tcx: TyCtxt<'_>) -> Self {
+    fn from_tcx(import: clean::Import, tcx: TyCtxt<'_>) -> Self {
         use clean::ImportKind::*;
         match import.kind {
             Simple(s) => Import {
                 source: import.source.path.whole_name(),
                 name: s.to_string(),
-                id: import.source.did.map(ItemId::from).map(from_item_id),
+                id: import.source.did.map(ItemId::from).map(|i| from_item_id(i, tcx)),
                 glob: false,
             },
             Glob => Import {
                 source: import.source.path.whole_name(),
                 name: import.source.path.last().to_string(),
-                id: import.source.did.map(ItemId::from).map(from_item_id),
+                id: import.source.did.map(ItemId::from).map(|i| from_item_id(i, tcx)),
                 glob: true,
             },
         }
@@ -742,6 +761,10 @@ impl FromWithTcx<ItemType> for ItemKind {
     }
 }
 
-fn ids(items: impl IntoIterator<Item = clean::Item>) -> Vec<Id> {
+fn ids(items: impl IntoIterator<Item = clean::Item>, tcx: TyCtxt<'_>) -> Vec<Id> {
-    items.into_iter().filter(|x| !x.is_stripped()).map(|i| from_item_id(i.item_id)).collect()
+    items
+        .into_iter()
+        .filter(|x| !x.is_stripped())
+        .map(|i| from_item_id_with_name(i.item_id, tcx, i.name))
+        .collect()
 }

src/librustdoc/json/mod.rs

@@ -16,6 +16,7 @@ use rustc_data_structures::fx::FxHashMap;
 use rustc_hir::def_id::DefId;
 use rustc_middle::ty::TyCtxt;
 use rustc_session::Session;
+use rustc_span::def_id::LOCAL_CRATE;
 
 use rustdoc_json_types as types;
 
@@ -25,7 +26,7 @@ use crate::docfs::PathError;
 use crate::error::Error;
 use crate::formats::cache::Cache;
 use crate::formats::FormatRenderer;
-use crate::json::conversions::{from_item_id, IntoWithTcx};
+use crate::json::conversions::{from_item_id, from_item_id_with_name, IntoWithTcx};
 use crate::{clean, try_err};
 
 #[derive(Clone)]
@@ -54,7 +55,7 @@ impl<'tcx> JsonRenderer<'tcx> {
                     .map(|i| {
                         let item = &i.impl_item;
                         self.item(item.clone()).unwrap();
-                        from_item_id(item.item_id)
+                        from_item_id_with_name(item.item_id, self.tcx, item.name)
                     })
                     .collect()
             })
@@ -86,7 +87,7 @@ impl<'tcx> JsonRenderer<'tcx> {
 
                         if item.item_id.is_local() || is_primitive_impl {
                             self.item(item.clone()).unwrap();
-                            Some(from_item_id(item.item_id))
+                            Some(from_item_id_with_name(item.item_id, self.tcx, item.name))
                         } else {
                             None
                         }
@@ -105,10 +106,11 @@ impl<'tcx> JsonRenderer<'tcx> {
                 if !id.is_local() {
                     let trait_item = &trait_item.trait_;
                     trait_item.items.clone().into_iter().for_each(|i| self.item(i).unwrap());
+                    let item_id = from_item_id(id.into(), self.tcx);
                     Some((
-                        from_item_id(id.into()),
+                        item_id.clone(),
                         types::Item {
-                            id: from_item_id(id.into()),
+                            id: item_id,
                             crate_id: id.krate.as_u32(),
                             name: self
                                 .cache
@@ -176,6 +178,7 @@ impl<'tcx> FormatRenderer<'tcx> for JsonRenderer<'tcx> {
         // Flatten items that recursively store other items
         item.kind.inner_items().for_each(|i| self.item(i.clone()).unwrap());
 
+        let name = item.name;
         let item_id = item.item_id;
         if let Some(mut new_item) = self.convert_item(item) {
             if let types::ItemEnum::Trait(ref mut t) = new_item.inner {
@@ -187,7 +190,10 @@ impl<'tcx> FormatRenderer<'tcx> for JsonRenderer<'tcx> {
             } else if let types::ItemEnum::Union(ref mut u) = new_item.inner {
                 u.impls = self.get_impls(item_id.expect_def_id())
             }
-            let removed = self.index.borrow_mut().insert(from_item_id(item_id), new_item.clone());
+            let removed = self
+                .index
+                .borrow_mut()
+                .insert(from_item_id_with_name(item_id, self.tcx, name), new_item.clone());
 
             // FIXME(adotinthevoid): Currently, the index is duplicated. This is a sanity check
             // to make sure the items are unique. The main place this happens is when an item, is
@@ -211,13 +217,15 @@ impl<'tcx> FormatRenderer<'tcx> for JsonRenderer<'tcx> {
             self.get_impls(*primitive);
         }
 
+        let e = ExternalCrate { crate_num: LOCAL_CRATE };
+
         let mut index = (*self.index).clone().into_inner();
         index.extend(self.get_trait_items());
         // This needs to be the default HashMap for compatibility with the public interface for
         // rustdoc-json-types
         #[allow(rustc::default_hash_types)]
         let output = types::Crate {
-            root: types::Id(String::from("0:0")),
+            root: types::Id(format!("0:0:{}", e.name(self.tcx).as_u32())),
             crate_version: self.cache.crate_version.clone(),
             includes_private: self.cache.document_private,
             index: index.into_iter().collect(),
@@ -229,7 +237,7 @@ impl<'tcx> FormatRenderer<'tcx> for JsonRenderer<'tcx> {
                 .chain(self.cache.external_paths.clone().into_iter())
                 .map(|(k, (path, kind))| {
                     (
-                        from_item_id(k.into()),
+                        from_item_id(k.into(), self.tcx),
                         types::ItemSummary {
                             crate_id: k.krate.as_u32(),
                             path: path.iter().map(|s| s.to_string()).collect(),

src/librustdoc/visit_ast.rs

@@ -286,8 +286,8 @@ impl<'a, 'tcx> RustdocVisitor<'a, 'tcx> {
                     self.visit_foreign_item(item, None, om);
                 }
             }
-            // If we're inlining, skip private items.
+            // If we're inlining, skip private items or item reexported as "_".
-            _ if self.inlining && !is_pub => {}
+            _ if self.inlining && (!is_pub || renamed == Some(kw::Underscore)) => {}
             hir::ItemKind::GlobalAsm(..) => {}
             hir::ItemKind::Use(_, hir::UseKind::ListStem) => {}
             hir::ItemKind::Use(path, kind) => {

src/test/rustdoc-json/reexport/same_type_reexported_more_than_once.rs

@@ -0,0 +1,17 @@
+// Regression test for https://github.com/rust-lang/rust/issues/97432.
+
+#![feature(no_core)]
+#![no_std]
+#![no_core]
+
+// @has same_type_reexported_more_than_once.json
+// @set trait_id = - "$.index[*][?(@.name=='Trait')].id"
+// @has - "$.index[*][?(@.name=='same_type_reexported_more_than_once')].inner.items[*]" $trait_id
+pub use inner::Trait;
+// @set reexport_id = - "$.index[*][?(@.name=='Reexport')].id"
+// @has - "$.index[*][?(@.name=='same_type_reexported_more_than_once')].inner.items[*]" $reexport_id
+pub use inner::Trait as Reexport;
+
+mod inner {
+    pub trait Trait {}
+}

src/test/rustdoc/anonymous-reexport.rs

@@ -0,0 +1,22 @@
+#![crate_name = "foo"]
+
+// This test ensures we don't display anonymous (non-inline) re-exports of public items.
+
+// @has 'foo/index.html'
+// @has - '//*[@id="main-content"]' ''
+// We check that the only "h2" present is for "Bla".
+// @count - '//*[@id="main-content"]/h2' 1
+// @has - '//*[@id="main-content"]/h2' 'Structs'
+// @count - '//*[@id="main-content"]//a[@class="struct"]' 1
+
+mod ext {
+    pub trait Foo {}
+    pub trait Bar {}
+    pub struct S;
+}
+
+pub use crate::ext::Foo as _;
+pub use crate::ext::Bar as _;
+pub use crate::ext::S as _;
+
+pub struct Bla;

src/test/ui/proc-macro/auxiliary/expand-expr.rs

@@ -12,15 +12,6 @@ use std::str::FromStr;
 
 #[proc_macro]
 pub fn expand_expr_is(input: TokenStream) -> TokenStream {
-    expand_expr_is_inner(input, false)
-}
-
-#[proc_macro]
-pub fn expand_expr_is_trim(input: TokenStream) -> TokenStream {
-    expand_expr_is_inner(input, true)
-}
-
-fn expand_expr_is_inner(input: TokenStream, trim_invisible: bool) -> TokenStream {
     let mut iter = input.into_iter();
     let mut expected_tts = Vec::new();
     loop {
@@ -31,18 +22,14 @@ fn expand_expr_is_inner(input: TokenStream, trim_invisible: bool) -> TokenStream
         }
     }
 
-    // If requested, trim the "invisible" delimiters at the start and end.
+    let expected = expected_tts.into_iter().collect::<TokenStream>();
-    let expected = expected_tts.into_iter().collect::<TokenStream>().to_string();
+    let expanded = iter.collect::<TokenStream>().expand_expr().expect("expand_expr failed");
-    let expected = if trim_invisible {
+    assert!(
-        let len1 = "/*«*/ ".len();
+        expected.to_string() == expanded.to_string(),
-        let len2 = " /*»*/".len();
+        "assert failed\nexpected: `{}`\nexpanded: `{}`",
-        &expected[len1..expected.len() - len2]
+        expected.to_string(),
-    } else {
+        expanded.to_string()
-        &expected[..]
+    );
-    };
-    let expanded = iter.collect::<TokenStream>().expand_expr().unwrap().to_string();
-
-    assert_eq!(expected, expanded);
 
     TokenStream::new()
 }

src/test/ui/proc-macro/capture-macro-rules-invoke.stdout

@@ -1,5 +1,4 @@
 PRINT-BANG INPUT (DISPLAY): self
-PRINT-BANG RE-COLLECTED (DISPLAY): /*«*/ self /*»*/
 PRINT-BANG INPUT (DEBUG): TokenStream [
     Group {
         delimiter: None,
@@ -14,10 +13,8 @@ PRINT-BANG INPUT (DEBUG): TokenStream [
 ]
 PRINT-BANG INPUT (DISPLAY): 1 + 1, { "a" }, let a = 1;, String, my_name, 'a, my_val = 30,
 std::option::Option, pub(in some::path) , [a b c], -30
-PRINT-BANG RE-COLLECTED (DISPLAY): /*«*/ 1 + 1 /*»*/, /*«*/ { "a" } /*»*/, /*«*/ let a = 1 /*»*/, /*«*/
+PRINT-BANG RE-COLLECTED (DISPLAY): 1 + 1, { "a" }, let a = 1, String, my_name, 'a, my_val = 30,
-String /*»*/, my_name, /*«*/ 'a /*»*/, /*«*/ my_val = 30 /*»*/, /*«*/
+std :: option :: Option, pub(in some :: path), [a b c], - 30
-std :: option :: Option /*»*/, /*«*/ pub(in some :: path) /*»*/, [a b c],
-/*«*/ - 30 /*»*/
 PRINT-BANG INPUT (DEBUG): TokenStream [
     Group {
         delimiter: None,
@@ -298,7 +295,6 @@ PRINT-BANG INPUT (DEBUG): TokenStream [
     },
 ]
 PRINT-BANG INPUT (DISPLAY): (a, b)
-PRINT-BANG RE-COLLECTED (DISPLAY): /*«*/ (a, b) /*»*/
 PRINT-BANG INPUT (DEBUG): TokenStream [
     Group {
         delimiter: None,

src/test/ui/proc-macro/capture-unglued-token.stdout

@@ -1,5 +1,5 @@
 PRINT-BANG INPUT (DISPLAY): Vec<u8>
-PRINT-BANG RE-COLLECTED (DISPLAY): /*«*/ Vec < u8 > /*»*/
+PRINT-BANG RE-COLLECTED (DISPLAY): Vec < u8 >
 PRINT-BANG INPUT (DEBUG): TokenStream [
     Group {
         delimiter: None,

src/test/ui/proc-macro/expand-expr.rs

@@ -2,9 +2,9 @@
 
 extern crate expand_expr;
 
-use expand_expr::{check_expand_expr_file, echo_pm, expand_expr_fail, expand_expr_is};
+use expand_expr::{
-use expand_expr::{expand_expr_is_trim, recursive_expand};
+    check_expand_expr_file, echo_pm, expand_expr_fail, expand_expr_is, recursive_expand,
-
+};
 
 // Check builtin macros can be expanded.
 
@@ -47,21 +47,21 @@ macro_rules! echo_expr {
 
 macro_rules! simple_lit {
     ($l:literal) => {
-        expand_expr_is_trim!($l, $l);
+        expand_expr_is!($l, $l);
-        expand_expr_is_trim!($l, echo_lit!($l));
+        expand_expr_is!($l, echo_lit!($l));
-        expand_expr_is_trim!($l, echo_expr!($l));
+        expand_expr_is!($l, echo_expr!($l));
-        expand_expr_is_trim!($l, echo_tts!($l));
+        expand_expr_is!($l, echo_tts!($l));
-        expand_expr_is_trim!($l, echo_pm!($l));
+        expand_expr_is!($l, echo_pm!($l));
         const _: () = {
             macro_rules! mac {
                 () => {
                     $l
                 };
             }
-            expand_expr_is_trim!($l, mac!());
+            expand_expr_is!($l, mac!());
-            expand_expr_is_trim!($l, echo_expr!(mac!()));
+            expand_expr_is!($l, echo_expr!(mac!()));
-            expand_expr_is_trim!($l, echo_tts!(mac!()));
+            expand_expr_is!($l, echo_tts!(mac!()));
-            expand_expr_is_trim!($l, echo_pm!(mac!()));
+            expand_expr_is!($l, echo_pm!(mac!()));
         };
     };
 }

src/test/ui/proc-macro/expr-stmt-nonterminal-tokens.stdout

@@ -1,6 +1,5 @@
 PRINT-DERIVE INPUT (DISPLAY): enum E { V = { let _ = #[allow(warnings)] 0 ; 0 }, }
-PRINT-DERIVE DEEP-RE-COLLECTED (DISPLAY): enum E
+PRINT-DERIVE DEEP-RE-COLLECTED (DISPLAY): enum E { V = { let _ = #[allow(warnings)] #[allow(warnings)] 0 ; 0 }, }
-{ V = { let _ = /*«*/ #[allow(warnings)] #[allow(warnings)] 0 /*»*/ ; 0 }, }
 PRINT-DERIVE INPUT (DEBUG): TokenStream [
     Ident {
         ident: "enum",
@@ -124,7 +123,7 @@ PRINT-DERIVE INPUT (DEBUG): TokenStream [
     },
 ]
 PRINT-DERIVE INPUT (DISPLAY): enum E { V = { let _ = { 0; } ; 0 }, }
-PRINT-DERIVE DEEP-RE-COLLECTED (DISPLAY): enum E { V = { let _ = { /*«*/ 0 /*»*/ } ; 0 }, }
+PRINT-DERIVE DEEP-RE-COLLECTED (DISPLAY): enum E { V = { let _ = { 0 } ; 0 }, }
 PRINT-DERIVE INPUT (DEBUG): TokenStream [
     Ident {
         ident: "enum",
@@ -204,7 +203,6 @@ PRINT-DERIVE INPUT (DEBUG): TokenStream [
     },
 ]
 PRINT-DERIVE INPUT (DISPLAY): enum E { V = { let _ = { {} } ; 0 }, }
-PRINT-DERIVE DEEP-RE-COLLECTED (DISPLAY): enum E { V = { let _ = { /*«*/ {} /*»*/ } ; 0 }, }
 PRINT-DERIVE INPUT (DEBUG): TokenStream [
     Ident {
         ident: "enum",
@@ -283,7 +281,7 @@ PRINT-DERIVE INPUT (DEBUG): TokenStream [
     },
 ]
 PRINT-DERIVE INPUT (DISPLAY): enum E { V = { let _ = { PATH; } ; 0 }, }
-PRINT-DERIVE DEEP-RE-COLLECTED (DISPLAY): enum E { V = { let _ = { /*«*/ PATH /*»*/ } ; 0 }, }
+PRINT-DERIVE DEEP-RE-COLLECTED (DISPLAY): enum E { V = { let _ = { PATH } ; 0 }, }
 PRINT-DERIVE INPUT (DEBUG): TokenStream [
     Ident {
         ident: "enum",
@@ -361,7 +359,7 @@ PRINT-DERIVE INPUT (DEBUG): TokenStream [
     },
 ]
 PRINT-DERIVE INPUT (DISPLAY): enum E { V = { let _ = { 0 + 1; } ; 0 }, }
-PRINT-DERIVE DEEP-RE-COLLECTED (DISPLAY): enum E { V = { let _ = { /*«*/ 0 + 1 /*»*/ } ; 0 }, }
+PRINT-DERIVE DEEP-RE-COLLECTED (DISPLAY): enum E { V = { let _ = { 0 + 1 } ; 0 }, }
 PRINT-DERIVE INPUT (DEBUG): TokenStream [
     Ident {
         ident: "enum",
@@ -452,7 +450,7 @@ PRINT-DERIVE INPUT (DEBUG): TokenStream [
     },
 ]
 PRINT-DERIVE INPUT (DISPLAY): enum E { V = { let _ = { PATH + 1; } ; 0 }, }
-PRINT-DERIVE DEEP-RE-COLLECTED (DISPLAY): enum E { V = { let _ = { /*«*/ PATH + 1 /*»*/ } ; 0 }, }
+PRINT-DERIVE DEEP-RE-COLLECTED (DISPLAY): enum E { V = { let _ = { PATH + 1 } ; 0 }, }
 PRINT-DERIVE INPUT (DEBUG): TokenStream [
     Ident {
         ident: "enum",

src/test/ui/proc-macro/issue-75734-pp-paren.stdout

@@ -96,7 +96,6 @@ PRINT-ATTR INPUT (DEBUG): TokenStream [
     },
 ]
 PRINT-BANG INPUT (DISPLAY): 1 + 1 * 2
-PRINT-BANG RE-COLLECTED (DISPLAY): /*«*/ 1 + 1 /*»*/ * 2
 PRINT-BANG INPUT (DEBUG): TokenStream [
     Group {
         delimiter: None,

src/test/ui/proc-macro/issue-78675-captured-inner-attrs.stdout

@@ -1,7 +1,7 @@
 PRINT-BANG INPUT (DISPLAY): foo! { #[fake_attr] mod bar {
     #![doc = r" Foo"]
 } }
-PRINT-BANG DEEP-RE-COLLECTED (DISPLAY): foo! { #[fake_attr] /*«*/ mod bar { #! [doc = r" Foo"] } /*»*/ }
+PRINT-BANG DEEP-RE-COLLECTED (DISPLAY): foo! { #[fake_attr] mod bar { #! [doc = r" Foo"] } }
 PRINT-BANG INPUT (DEBUG): TokenStream [
     Ident {
         ident: "foo",

src/test/ui/proc-macro/issue-80760-empty-stmt.stdout

@@ -1,5 +1,4 @@
 PRINT-BANG INPUT (DISPLAY): ;
-PRINT-BANG RE-COLLECTED (DISPLAY): /*«*/ ; /*»*/
 PRINT-BANG INPUT (DEBUG): TokenStream [
     Group {
         delimiter: None,

src/test/ui/proc-macro/nested-nonterminal-tokens.stdout

@@ -1,6 +1,4 @@
 PRINT-BANG INPUT (DISPLAY): 0 + 1 + 2 + 3
-PRINT-BANG RE-COLLECTED (DISPLAY): /*«*/ 0 + 1 + 2 /*»*/ + 3
-PRINT-BANG DEEP-RE-COLLECTED (DISPLAY): /*«*/ /*«*/ /*«*/ 0 /*»*/ + 1 /*»*/ + 2 /*»*/ + 3
 PRINT-BANG INPUT (DEBUG): TokenStream [
     Group {
         delimiter: None,

src/test/ui/proc-macro/nodelim-groups.stdout

@@ -1,5 +1,4 @@
 PRINT-BANG INPUT (DISPLAY): "hi" 1 + (25) + 1 (1 + 1)
-PRINT-BANG RE-COLLECTED (DISPLAY): "hi" /*«*/ 1 + (25) + 1 /*»*/ (1 + 1)
 PRINT-BANG INPUT (DEBUG): TokenStream [
     Literal {
         kind: Str,
@@ -72,9 +71,6 @@ PRINT-BANG INPUT (DEBUG): TokenStream [
     },
 ]
 PRINT-BANG INPUT (DISPLAY): "hi" "hello".len() + "world".len() (1 + 1)
-PRINT-BANG RE-COLLECTED (DISPLAY): "hi" /*«*/ "hello".len() + "world".len() /*»*/ (1 + 1)
-PRINT-BANG DEEP-RE-COLLECTED (DISPLAY): "hi" /*«*/ /*«*/ "hello".len() /*»*/ + /*«*/ "world".len() /*»*/ /*»*/
-(1 + 1)
 PRINT-BANG INPUT (DEBUG): TokenStream [
     Literal {
         kind: Str,

src/test/ui/proc-macro/nonterminal-expansion.stdout

@@ -1,5 +1,5 @@
 PRINT-ATTR_ARGS INPUT (DISPLAY): a, line!(), b
-PRINT-ATTR_ARGS RE-COLLECTED (DISPLAY): a, /*«*/ line! () /*»*/, b
+PRINT-ATTR_ARGS RE-COLLECTED (DISPLAY): a, line! (), b
 PRINT-ATTR_ARGS INPUT (DEBUG): TokenStream [
     Ident {
         ident: "a",

src/test/ui/proc-macro/nonterminal-token-hygiene.stdout

@@ -1,5 +1,5 @@
 PRINT-BANG INPUT (DISPLAY): struct S;
-PRINT-BANG RE-COLLECTED (DISPLAY): /*«*/ struct S ; /*»*/
+PRINT-BANG RE-COLLECTED (DISPLAY): struct S ;
 PRINT-BANG INPUT (DEBUG): TokenStream [
     Group {
         delimiter: None,

src/test/ui/proc-macro/parent-source-spans.rs

@@ -8,16 +8,16 @@ use parent_source_spans::parent_source_spans;
 
 macro one($a:expr, $b:expr) {
     two!($a, $b);
-    //~^ ERROR first parent: /*«*/ "hello" /*»*/
+    //~^ ERROR first parent: "hello"
-    //~| ERROR second parent: /*«*/ "world" /*»*/
+    //~| ERROR second parent: "world"
 }
 
 macro two($a:expr, $b:expr) {
     three!($a, $b);
-    //~^ ERROR first final: /*«*/ "hello" /*»*/
+    //~^ ERROR first final: "hello"
-    //~| ERROR second final: /*«*/ "world" /*»*/
+    //~| ERROR second final: "world"
-    //~| ERROR first final: /*«*/ "yay" /*»*/
+    //~| ERROR first final: "yay"
-    //~| ERROR second final: /*«*/ "rust" /*»*/
+    //~| ERROR second final: "rust"
 }
 
 // forwarding tokens directly doesn't create a new source chain
@@ -34,16 +34,16 @@ macro four($($tokens:tt)*) {
 
 fn main() {
     one!("hello", "world");
-    //~^ ERROR first grandparent: /*«*/ "hello" /*»*/
+    //~^ ERROR first grandparent: "hello"
-    //~| ERROR second grandparent: /*«*/ "world" /*»*/
+    //~| ERROR second grandparent: "world"
-    //~| ERROR first source: /*«*/ "hello" /*»*/
+    //~| ERROR first source: "hello"
-    //~| ERROR second source: /*«*/ "world" /*»*/
+    //~| ERROR second source: "world"
 
     two!("yay", "rust");
-    //~^ ERROR first parent: /*«*/ "yay" /*»*/
+    //~^ ERROR first parent: "yay"
-    //~| ERROR second parent: /*«*/ "rust" /*»*/
+    //~| ERROR second parent: "rust"
-    //~| ERROR first source: /*«*/ "yay" /*»*/
+    //~| ERROR first source: "yay"
-    //~| ERROR second source: /*«*/ "rust" /*»*/
+    //~| ERROR second source: "rust"
 
     three!("hip", "hop");
     //~^ ERROR first final: "hip"

src/test/ui/proc-macro/parent-source-spans.stderr

@@ -1,4 +1,4 @@
-error: first final: /*«*/ "hello" /*»*/
+error: first final: "hello"
   --> $DIR/parent-source-spans.rs:16:12
    |
 LL |     three!($a, $b);
@@ -9,7 +9,7 @@ LL |     one!("hello", "world");
    |
    = note: this error originates in the macro `two` (in Nightly builds, run with -Z macro-backtrace for more info)
 
-error: second final: /*«*/ "world" /*»*/
+error: second final: "world"
   --> $DIR/parent-source-spans.rs:16:16
    |
 LL |     three!($a, $b);
@@ -20,7 +20,7 @@ LL |     one!("hello", "world");
    |
    = note: this error originates in the macro `two` (in Nightly builds, run with -Z macro-backtrace for more info)
 
-error: first parent: /*«*/ "hello" /*»*/
+error: first parent: "hello"
   --> $DIR/parent-source-spans.rs:10:5
    |
 LL |     two!($a, $b);
@@ -31,7 +31,7 @@ LL |     one!("hello", "world");
    |
    = note: this error originates in the macro `one` (in Nightly builds, run with -Z macro-backtrace for more info)
 
-error: second parent: /*«*/ "world" /*»*/
+error: second parent: "world"
   --> $DIR/parent-source-spans.rs:10:5
    |
 LL |     two!($a, $b);
@@ -42,31 +42,31 @@ LL |     one!("hello", "world");
    |
    = note: this error originates in the macro `one` (in Nightly builds, run with -Z macro-backtrace for more info)
 
-error: first grandparent: /*«*/ "hello" /*»*/
+error: first grandparent: "hello"
   --> $DIR/parent-source-spans.rs:36:5
    |
 LL |     one!("hello", "world");
    |     ^^^^^^^^^^^^^^^^^^^^^^
 
-error: second grandparent: /*«*/ "world" /*»*/
+error: second grandparent: "world"
   --> $DIR/parent-source-spans.rs:36:5
    |
 LL |     one!("hello", "world");
    |     ^^^^^^^^^^^^^^^^^^^^^^
 
-error: first source: /*«*/ "hello" /*»*/
+error: first source: "hello"
   --> $DIR/parent-source-spans.rs:36:5
    |
 LL |     one!("hello", "world");
    |     ^^^^^^^^^^^^^^^^^^^^^^
 
-error: second source: /*«*/ "world" /*»*/
+error: second source: "world"
   --> $DIR/parent-source-spans.rs:36:5
    |
 LL |     one!("hello", "world");
    |     ^^^^^^^^^^^^^^^^^^^^^^
 
-error: first final: /*«*/ "yay" /*»*/
+error: first final: "yay"
   --> $DIR/parent-source-spans.rs:16:12
    |
 LL |     three!($a, $b);
@@ -77,7 +77,7 @@ LL |     two!("yay", "rust");
    |
    = note: this error originates in the macro `two` (in Nightly builds, run with -Z macro-backtrace for more info)
 
-error: second final: /*«*/ "rust" /*»*/
+error: second final: "rust"
   --> $DIR/parent-source-spans.rs:16:16
    |
 LL |     three!($a, $b);
@@ -88,25 +88,25 @@ LL |     two!("yay", "rust");
    |
    = note: this error originates in the macro `two` (in Nightly builds, run with -Z macro-backtrace for more info)
 
-error: first parent: /*«*/ "yay" /*»*/
+error: first parent: "yay"
   --> $DIR/parent-source-spans.rs:42:5
    |
 LL |     two!("yay", "rust");
    |     ^^^^^^^^^^^^^^^^^^^
 
-error: second parent: /*«*/ "rust" /*»*/
+error: second parent: "rust"
   --> $DIR/parent-source-spans.rs:42:5
    |
 LL |     two!("yay", "rust");
    |     ^^^^^^^^^^^^^^^^^^^
 
-error: first source: /*«*/ "yay" /*»*/
+error: first source: "yay"
   --> $DIR/parent-source-spans.rs:42:5
    |
 LL |     two!("yay", "rust");
    |     ^^^^^^^^^^^^^^^^^^^
 
-error: second source: /*«*/ "rust" /*»*/
+error: second source: "rust"
   --> $DIR/parent-source-spans.rs:42:5
    |
 LL |     two!("yay", "rust");

src/test/ui/rfc-2011-nicer-assert-messages/feature-gate-generic_assert.rs

@@ -0,0 +1,26 @@
+// compile-flags: --test
+// run-pass
+
+// `generic_assert` is completely unimplemented and doesn't generate any logic, thus the
+// reason why this test currently passes
+#![feature(core_intrinsics, generic_assert, generic_assert_internals)]
+
+use std::fmt::{Debug, Formatter};
+
+#[derive(Clone, Copy, PartialEq)]
+struct CopyDebug(i32);
+
+impl Debug for CopyDebug {
+  fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), std::fmt::Error> {
+    f.write_str("With great power comes great electricity bills")
+  }
+}
+
+#[test]
+fn test() {
+  let _copy_debug = CopyDebug(1);
+  assert!(_copy_debug == CopyDebug(3));
+}
+
+fn main() {
+}