Rollup of 9 pull requests

compiler/rustc_expand/messages.ftl

@@ -16,6 +16,9 @@ expand_attributes_wrong_form =
 expand_cannot_be_name_of_macro =
     `{$trait_ident}` cannot be a name of {$macro_type} macro
 
+expand_collapse_debuginfo_illegal =
+    illegal value for attribute #[collapse_debuginfo(no|external|yes)]
+
 expand_count_repetition_misplaced =
     `count` can not be placed inside the inner-most repetition
 

compiler/rustc_expand/src/base.rs

@@ -1,5 +1,6 @@
 #![deny(rustc::untranslatable_diagnostic)]
 
+use crate::base::ast::NestedMetaItem;
 use crate::errors;
 use crate::expand::{self, AstFragment, Invocation};
 use crate::module::DirOwnership;
@@ -19,6 +20,7 @@ use rustc_feature::Features;
 use rustc_lint_defs::builtin::PROC_MACRO_BACK_COMPAT;
 use rustc_lint_defs::{BufferedEarlyLint, BuiltinLintDiagnostics, RegisteredTools};
 use rustc_parse::{parser, MACRO_ARGUMENTS};
+use rustc_session::config::CollapseMacroDebuginfo;
 use rustc_session::errors::report_lit_error;
 use rustc_session::{parse::ParseSess, Limit, Session};
 use rustc_span::def_id::{CrateNum, DefId, LocalDefId};
@@ -761,6 +763,55 @@ impl SyntaxExtension {
         }
     }
 
+    fn collapse_debuginfo_by_name(sess: &Session, attr: &Attribute) -> CollapseMacroDebuginfo {
+        use crate::errors::CollapseMacroDebuginfoIllegal;
+        // #[collapse_debuginfo] without enum value (#[collapse_debuginfo(no/external/yes)])
+        // considered as `yes`
+        attr.meta_item_list().map_or(CollapseMacroDebuginfo::Yes, |l| {
+            let [NestedMetaItem::MetaItem(item)] = &l[..] else {
+                sess.dcx().emit_err(CollapseMacroDebuginfoIllegal { span: attr.span });
+                return CollapseMacroDebuginfo::Unspecified;
+            };
+            if !item.is_word() {
+                sess.dcx().emit_err(CollapseMacroDebuginfoIllegal { span: item.span });
+                CollapseMacroDebuginfo::Unspecified
+            } else {
+                match item.name_or_empty() {
+                    sym::no => CollapseMacroDebuginfo::No,
+                    sym::external => CollapseMacroDebuginfo::External,
+                    sym::yes => CollapseMacroDebuginfo::Yes,
+                    _ => {
+                        sess.dcx().emit_err(CollapseMacroDebuginfoIllegal { span: item.span });
+                        CollapseMacroDebuginfo::Unspecified
+                    }
+                }
+            }
+        })
+    }
+
+    /// if-ext - if macro from different crate (related to callsite code)
+    /// | cmd \ attr    | no  | (unspecified) | external | yes |
+    /// | no            | no  | no            | no       | no  |
+    /// | (unspecified) | no  | no            | if-ext   | yes |
+    /// | external      | no  | if-ext        | if-ext   | yes |
+    /// | yes           | yes | yes           | yes      | yes |
+    fn get_collapse_debuginfo(sess: &Session, attrs: &[ast::Attribute], is_local: bool) -> bool {
+        let collapse_debuginfo_attr = attr::find_by_name(attrs, sym::collapse_debuginfo)
+            .map(|v| Self::collapse_debuginfo_by_name(sess, v))
+            .unwrap_or(CollapseMacroDebuginfo::Unspecified);
+        let flag = sess.opts.unstable_opts.collapse_macro_debuginfo;
+        let attr = collapse_debuginfo_attr;
+        let ext = !is_local;
+        #[rustfmt::skip]
+        let collapse_table = [
+            [false, false, false, false],
+            [false, false, ext,   true],
+            [false, ext,   ext,   true],
+            [true,  true,  true,  true],
+        ];
+        collapse_table[flag as usize][attr as usize]
+    }
+
     /// Constructs a syntax extension with the given properties
     /// and other properties converted from attributes.
     pub fn new(
@@ -772,6 +823,7 @@ impl SyntaxExtension {
         edition: Edition,
         name: Symbol,
         attrs: &[ast::Attribute],
+        is_local: bool,
     ) -> SyntaxExtension {
         let allow_internal_unstable =
             attr::allow_internal_unstable(sess, attrs).collect::<Vec<Symbol>>();
@@ -780,8 +832,8 @@ impl SyntaxExtension {
         let local_inner_macros = attr::find_by_name(attrs, sym::macro_export)
             .and_then(|macro_export| macro_export.meta_item_list())
             .is_some_and(|l| attr::list_contains_name(&l, sym::local_inner_macros));
-        let collapse_debuginfo = attr::contains_name(attrs, sym::collapse_debuginfo);
-        tracing::debug!(?local_inner_macros, ?collapse_debuginfo, ?allow_internal_unsafe);
+        let collapse_debuginfo = Self::get_collapse_debuginfo(sess, attrs, is_local);
+        tracing::debug!(?name, ?local_inner_macros, ?collapse_debuginfo, ?allow_internal_unsafe);
 
         let (builtin_name, helper_attrs) = attr::find_by_name(attrs, sym::rustc_builtin_macro)
             .map(|attr| {

compiler/rustc_expand/src/errors.rs

@@ -58,6 +58,13 @@ pub(crate) struct ResolveRelativePath {
     pub path: String,
 }
 
+#[derive(Diagnostic)]
+#[diag(expand_collapse_debuginfo_illegal)]
+pub(crate) struct CollapseMacroDebuginfoIllegal {
+    #[primary_span]
+    pub span: Span,
+}
+
 #[derive(Diagnostic)]
 #[diag(expand_macro_const_stability)]
 pub(crate) struct MacroConstStability {

compiler/rustc_expand/src/mbe/macro_rules.rs

@@ -367,6 +367,7 @@ pub fn compile_declarative_macro(
             edition,
             def.ident.name,
             &def.attrs,
+            def.id != DUMMY_NODE_ID,
         )
     };
     let dummy_syn_ext = || (mk_syn_ext(Box::new(macro_rules_dummy_expander)), Vec::new());

compiler/rustc_feature/src/builtin_attrs.rs

@@ -469,7 +469,7 @@ pub const BUILTIN_ATTRIBUTES: &[BuiltinAttribute] = &[
 
     // `#[collapse_debuginfo]`
     gated!(
-        collapse_debuginfo, Normal, template!(Word), WarnFollowing,
+        collapse_debuginfo, Normal, template!(Word, List: "no|external|yes"), ErrorFollowing,
         experimental!(collapse_debuginfo)
     ),
 

compiler/rustc_hir_analysis/src/astconv/mod.rs

@@ -1446,7 +1446,7 @@ impl<'o, 'tcx> dyn AstConv<'tcx> + 'o {
         }
 
         let candidates: Vec<_> = tcx
-            .inherent_impls(adt_did)
+            .inherent_impls(adt_did)?
             .iter()
             .filter_map(|&impl_| Some((impl_, self.lookup_assoc_ty_unchecked(name, block, impl_)?)))
             .collect();

compiler/rustc_hir_analysis/src/coherence/inherent_impls.rs

@@ -13,32 +13,41 @@ use rustc_hir::def_id::{DefId, LocalDefId};
 use rustc_middle::ty::fast_reject::{simplify_type, SimplifiedType, TreatParams};
 use rustc_middle::ty::{self, CrateInherentImpls, Ty, TyCtxt};
 use rustc_span::symbol::sym;
+use rustc_span::ErrorGuaranteed;
 
 use crate::errors;
 
 /// On-demand query: yields a map containing all types mapped to their inherent impls.
-pub fn crate_inherent_impls(tcx: TyCtxt<'_>, (): ()) -> CrateInherentImpls {
+pub fn crate_inherent_impls(
+    tcx: TyCtxt<'_>,
+    (): (),
+) -> Result<&'_ CrateInherentImpls, ErrorGuaranteed> {
     let mut collect = InherentCollect { tcx, impls_map: Default::default() };
+    let mut res = Ok(());
     for id in tcx.hir().items() {
-        collect.check_item(id);
+        res = res.and(collect.check_item(id));
     }
-    collect.impls_map
+    res?;
+    Ok(tcx.arena.alloc(collect.impls_map))
 }
 
-pub fn crate_incoherent_impls(tcx: TyCtxt<'_>, simp: SimplifiedType) -> &[DefId] {
-    let crate_map = tcx.crate_inherent_impls(());
-    tcx.arena.alloc_from_iter(
+pub fn crate_incoherent_impls(
+    tcx: TyCtxt<'_>,
+    simp: SimplifiedType,
+) -> Result<&[DefId], ErrorGuaranteed> {
+    let crate_map = tcx.crate_inherent_impls(())?;
+    Ok(tcx.arena.alloc_from_iter(
         crate_map.incoherent_impls.get(&simp).unwrap_or(&Vec::new()).iter().map(|d| d.to_def_id()),
-    )
+    ))
 }
 
 /// On-demand query: yields a vector of the inherent impls for a specific type.
-pub fn inherent_impls(tcx: TyCtxt<'_>, ty_def_id: LocalDefId) -> &[DefId] {
-    let crate_map = tcx.crate_inherent_impls(());
-    match crate_map.inherent_impls.get(&ty_def_id) {
+pub fn inherent_impls(tcx: TyCtxt<'_>, ty_def_id: LocalDefId) -> Result<&[DefId], ErrorGuaranteed> {
+    let crate_map = tcx.crate_inherent_impls(())?;
+    Ok(match crate_map.inherent_impls.get(&ty_def_id) {
         Some(v) => &v[..],
         None => &[],
-    }
+    })
 }
 
 struct InherentCollect<'tcx> {
@@ -47,33 +56,36 @@ struct InherentCollect<'tcx> {
 }
 
 impl<'tcx> InherentCollect<'tcx> {
-    fn check_def_id(&mut self, impl_def_id: LocalDefId, self_ty: Ty<'tcx>, ty_def_id: DefId) {
+    fn check_def_id(
+        &mut self,
+        impl_def_id: LocalDefId,
+        self_ty: Ty<'tcx>,
+        ty_def_id: DefId,
+    ) -> Result<(), ErrorGuaranteed> {
         if let Some(ty_def_id) = ty_def_id.as_local() {
             // Add the implementation to the mapping from implementation to base
             // type def ID, if there is a base type for this implementation and
             // the implementation does not have any associated traits.
             let vec = self.impls_map.inherent_impls.entry(ty_def_id).or_default();
             vec.push(impl_def_id.to_def_id());
-            return;
+            return Ok(());
         }
 
         if self.tcx.features().rustc_attrs {
             let items = self.tcx.associated_item_def_ids(impl_def_id);
 
             if !self.tcx.has_attr(ty_def_id, sym::rustc_has_incoherent_inherent_impls) {
                 let impl_span = self.tcx.def_span(impl_def_id);
-                self.tcx.dcx().emit_err(errors::InherentTyOutside { span: impl_span });
-                return;
+                return Err(self.tcx.dcx().emit_err(errors::InherentTyOutside { span: impl_span }));
             }
 
             for &impl_item in items {
                 if !self.tcx.has_attr(impl_item, sym::rustc_allow_incoherent_impl) {
                     let impl_span = self.tcx.def_span(impl_def_id);
-                    self.tcx.dcx().emit_err(errors::InherentTyOutsideRelevant {
+                    return Err(self.tcx.dcx().emit_err(errors::InherentTyOutsideRelevant {
                         span: impl_span,
                         help_span: self.tcx.def_span(impl_item),
-                    });
-                    return;
+                    }));
                 }
             }
 
@@ -82,24 +94,28 @@ impl<'tcx> InherentCollect<'tcx> {
             } else {
                 bug!("unexpected self type: {:?}", self_ty);
             }
+            Ok(())
         } else {
             let impl_span = self.tcx.def_span(impl_def_id);
-            self.tcx.dcx().emit_err(errors::InherentTyOutsideNew { span: impl_span });
+            Err(self.tcx.dcx().emit_err(errors::InherentTyOutsideNew { span: impl_span }))
         }
     }
 
-    fn check_primitive_impl(&mut self, impl_def_id: LocalDefId, ty: Ty<'tcx>) {
+    fn check_primitive_impl(
+        &mut self,
+        impl_def_id: LocalDefId,
+        ty: Ty<'tcx>,
+    ) -> Result<(), ErrorGuaranteed> {
         let items = self.tcx.associated_item_def_ids(impl_def_id);
         if !self.tcx.hir().rustc_coherence_is_core() {
             if self.tcx.features().rustc_attrs {
                 for &impl_item in items {
                     if !self.tcx.has_attr(impl_item, sym::rustc_allow_incoherent_impl) {
                         let span = self.tcx.def_span(impl_def_id);
-                        self.tcx.dcx().emit_err(errors::InherentTyOutsidePrimitive {
+                        return Err(self.tcx.dcx().emit_err(errors::InherentTyOutsidePrimitive {
                             span,
                             help_span: self.tcx.def_span(impl_item),
-                        });
-                        return;
+                        }));
                     }
                 }
             } else {
@@ -108,8 +124,7 @@ impl<'tcx> InherentCollect<'tcx> {
                 if let ty::Ref(_, subty, _) = ty.kind() {
                     note = Some(errors::InherentPrimitiveTyNote { subty: *subty });
                 }
-                self.tcx.dcx().emit_err(errors::InherentPrimitiveTy { span, note });
-                return;
+                return Err(self.tcx.dcx().emit_err(errors::InherentPrimitiveTy { span, note }));
             }
         }
 
@@ -118,11 +133,12 @@ impl<'tcx> InherentCollect<'tcx> {
         } else {
             bug!("unexpected primitive type: {:?}", ty);
         }
+        Ok(())
     }
 
-    fn check_item(&mut self, id: hir::ItemId) {
+    fn check_item(&mut self, id: hir::ItemId) -> Result<(), ErrorGuaranteed> {
         if !matches!(self.tcx.def_kind(id.owner_id), DefKind::Impl { of_trait: false }) {
-            return;
+            return Ok(());
         }
 
         let id = id.owner_id.def_id;
@@ -132,10 +148,10 @@ impl<'tcx> InherentCollect<'tcx> {
             ty::Adt(def, _) => self.check_def_id(id, self_ty, def.did()),
             ty::Foreign(did) => self.check_def_id(id, self_ty, did),
             ty::Dynamic(data, ..) if data.principal_def_id().is_some() => {
-                self.check_def_id(id, self_ty, data.principal_def_id().unwrap());
+                self.check_def_id(id, self_ty, data.principal_def_id().unwrap())
             }
             ty::Dynamic(..) => {
-                self.tcx.dcx().emit_err(errors::InherentDyn { span: item_span });
+                Err(self.tcx.dcx().emit_err(errors::InherentDyn { span: item_span }))
             }
             ty::Bool
             | ty::Char
@@ -151,7 +167,7 @@ impl<'tcx> InherentCollect<'tcx> {
             | ty::FnPtr(_)
             | ty::Tuple(..) => self.check_primitive_impl(id, self_ty),
             ty::Alias(..) | ty::Param(_) => {
-                self.tcx.dcx().emit_err(errors::InherentNominal { span: item_span });
+                Err(self.tcx.dcx().emit_err(errors::InherentNominal { span: item_span }))
             }
             ty::FnDef(..)
             | ty::Closure(..)
@@ -162,7 +178,8 @@ impl<'tcx> InherentCollect<'tcx> {
             | ty::Infer(_) => {
                 bug!("unexpected impl self type of impl: {:?} {:?}", id, self_ty);
             }
-            ty::Error(_) => {}
+            // We could bail out here, but that will silence other useful errors.
+            ty::Error(_) => Ok(()),
         }
     }
 }