| use std::mem; |
| |
| use rustc_ast::visit::FnKind; |
| use rustc_ast::*; |
| use rustc_attr_parsing as attr; |
| use rustc_attr_parsing::{AttributeParser, OmitDoc, ShouldEmit}; |
| use rustc_expand::expand::AstFragment; |
| use rustc_hir as hir; |
| use rustc_hir::Target; |
| use rustc_hir::def::DefKind; |
| use rustc_hir::def::Namespace::{TypeNS, ValueNS}; |
| use rustc_hir::def_id::LocalDefId; |
| use rustc_middle::span_bug; |
| use rustc_middle::ty::{PerOwnerResolverData, TyCtxtFeed}; |
| use rustc_span::{Span, Symbol, sym}; |
| use tracing::{debug, instrument}; |
| |
| use crate::macros::MacroRulesScopeRef; |
| use crate::{ |
| ConstArgContext, ImplTraitContext, InvocationParent, ParentScope, Resolver, with_owner, |
| with_owner_tables, |
| }; |
| |
| pub(crate) fn collect_definitions<'ra>( |
| resolver: &mut Resolver<'ra, '_>, |
| fragment: &AstFragment, |
| parent_scope: ParentScope<'ra>, |
| ) -> MacroRulesScopeRef<'ra> { |
| let invocation_parent = resolver.invocation_parents[&parent_scope.expansion]; |
| debug!("new fragment to visit with invocation_parent: {invocation_parent:?}"); |
| debug_assert_eq!(resolver.current_owner.id, DUMMY_NODE_ID); |
| with_owner(resolver, invocation_parent.owner, |r| { |
| let mut visitor = DefCollector { r, invocation_parent, parent_scope }; |
| fragment.visit_with(&mut visitor); |
| visitor.parent_scope.macro_rules |
| }) |
| } |
| |
| /// Creates `DefId`s for nodes in the AST. |
| pub(crate) struct DefCollector<'a, 'ra, 'tcx> { |
| pub(crate) r: &'a mut Resolver<'ra, 'tcx>, |
| invocation_parent: InvocationParent, |
| pub(crate) parent_scope: ParentScope<'ra>, |
| } |
| |
| impl<'a, 'ra, 'tcx> DefCollector<'a, 'ra, 'tcx> { |
| pub(super) fn create_def( |
| &mut self, |
| node_id: NodeId, |
| name: Option<Symbol>, |
| def_kind: DefKind, |
| span: Span, |
| ) -> TyCtxtFeed<'tcx, LocalDefId> { |
| let parent_def = self.invocation_parent.parent_def; |
| debug!( |
| "create_def(node_id={:?}, def_kind={:?}, parent_def={:?})", |
| node_id, def_kind, parent_def |
| ); |
| self.r.create_def( |
| parent_def, |
| node_id, |
| name, |
| def_kind, |
| self.parent_scope.expansion.to_expn_id(), |
| span.with_parent(None), |
| false, |
| ) |
| } |
| |
| fn with_parent<F: FnOnce(&mut Self)>(&mut self, parent_def: LocalDefId, f: F) { |
| let orig_parent_def = mem::replace(&mut self.invocation_parent.parent_def, parent_def); |
| f(self); |
| self.invocation_parent.parent_def = orig_parent_def; |
| } |
| |
| pub(super) fn with_owner<F: FnOnce(&mut Self, TyCtxtFeed<'tcx, LocalDefId>)>( |
| &mut self, |
| owner: NodeId, |
| name: Option<Symbol>, |
| def_kind: DefKind, |
| span: Span, |
| f: F, |
| ) { |
| debug_assert_ne!(owner, DUMMY_NODE_ID); |
| debug_assert_ne!(owner, CRATE_NODE_ID); |
| // We only get here if the owner didn't exist yet. After the owner has been created, |
| // future invocations of `collect_definitions` will get the owner out of the `owners` |
| // table. |
| let parent_def = self.invocation_parent.parent_def; |
| let feed = self.r.create_def( |
| parent_def, |
| owner, |
| name, |
| def_kind, |
| self.parent_scope.expansion.to_expn_id(), |
| span.with_parent(None), |
| true, |
| ); |
| let tables = PerOwnerResolverData::new(owner, feed.key()); |
| |
| let orig_invoc_owner = mem::replace(&mut self.invocation_parent.owner, owner); |
| with_owner_tables(self, owner, tables, |this| f(this, feed)); |
| let old = mem::replace(&mut self.invocation_parent.owner, orig_invoc_owner); |
| assert_eq!(old, owner); |
| } |
| |
| fn with_impl_trait<F: FnOnce(&mut Self)>( |
| &mut self, |
| impl_trait_context: ImplTraitContext, |
| f: F, |
| ) { |
| let orig_itc = |
| mem::replace(&mut self.invocation_parent.impl_trait_context, impl_trait_context); |
| f(self); |
| self.invocation_parent.impl_trait_context = orig_itc; |
| } |
| |
| fn with_const_arg<F: FnOnce(&mut Self)>(&mut self, ctxt: ConstArgContext, f: F) { |
| let orig = mem::replace(&mut self.invocation_parent.const_arg_context, ctxt); |
| f(self); |
| self.invocation_parent.const_arg_context = orig; |
| } |
| |
| fn collect_field(&mut self, field: &'a FieldDef, index: Option<usize>) { |
| let index = |this: &Self| { |
| index.unwrap_or_else(|| { |
| let node_id = NodeId::placeholder_from_expn_id(this.parent_scope.expansion); |
| this.r.placeholder_field_indices[&node_id] |
| }) |
| }; |
| |
| if field.is_placeholder { |
| let old_index = self.r.placeholder_field_indices.insert(field.id, index(self)); |
| assert!(old_index.is_none(), "placeholder field index is reset for a node ID"); |
| self.visit_macro_invoc(field.id); |
| self.visit_invoc(field.id); |
| } else { |
| let name = field.ident.map_or_else(|| sym::integer(index(self)), |ident| ident.name); |
| let def = self.create_def(field.id, Some(name), DefKind::Field, field.span); |
| self.with_parent(def.def_id(), |this| this.brg_visit_field_def(field, def)); |
| } |
| } |
| |
| #[instrument(level = "debug", skip(self))] |
| fn visit_macro_invoc(&mut self, id: NodeId) { |
| debug!(?self.invocation_parent); |
| |
| let id = id.placeholder_to_expn_id(); |
| let old_parent = self.r.invocation_parents.insert(id, self.invocation_parent); |
| assert!(old_parent.is_none(), "parent `LocalDefId` is reset for an invocation"); |
| } |
| } |
| |
| impl<'a, 'ra, 'tcx> visit::Visitor<'a> for DefCollector<'a, 'ra, 'tcx> { |
| fn visit_item(&mut self, i: &'a Item) { |
| // Pick the def data. This need not be unique, but the more |
| // information we encapsulate into, the better |
| let mut opt_syn_ext = None; |
| let def_kind = match &i.kind { |
| ItemKind::Impl(i) => DefKind::Impl { of_trait: i.of_trait.is_some() }, |
| ItemKind::ForeignMod(..) => DefKind::ForeignMod, |
| ItemKind::Mod(..) => DefKind::Mod, |
| ItemKind::Trait(..) => DefKind::Trait, |
| ItemKind::TraitAlias(..) => DefKind::TraitAlias, |
| ItemKind::Enum(..) => DefKind::Enum, |
| ItemKind::Struct(..) => DefKind::Struct, |
| ItemKind::Union(..) => DefKind::Union, |
| ItemKind::ExternCrate(..) => DefKind::ExternCrate, |
| ItemKind::TyAlias(..) => DefKind::TyAlias, |
| ItemKind::Static(s) => DefKind::Static { |
| safety: hir::Safety::Safe, |
| mutability: s.mutability, |
| nested: false, |
| }, |
| ItemKind::Const(citem) => { |
| let is_type_const = matches!(citem.rhs_kind, ConstItemRhsKind::TypeConst { .. }); |
| DefKind::Const { is_type_const } |
| } |
| ItemKind::ConstBlock(..) => DefKind::Const { is_type_const: false }, |
| ItemKind::Fn(..) | ItemKind::Delegation(..) => DefKind::Fn, |
| ItemKind::MacroDef(ident, def) => { |
| let edition = i.span.edition(); |
| |
| // FIXME(jdonszelmann) make one of these in the resolver? |
| // FIXME(jdonszelmann) don't care about tools here maybe? Just parse what we can. |
| // Does that prevents errors from happening? maybe |
| let mut parser = AttributeParser::new( |
| &self.r.tcx.sess, |
| self.r.tcx.features(), |
| self.r.tcx().registered_tools(()), |
| ShouldEmit::Nothing, |
| ); |
| let attrs = parser.parse_attribute_list( |
| &i.attrs, |
| i.span, |
| Target::MacroDef, |
| OmitDoc::Skip, |
| std::convert::identity, |
| |_lint_id, _span, _kind| { |
| // FIXME(jdonszelmann): emit lints here properly |
| // NOTE that before new attribute parsing, they didn't happen either |
| // but it would be nice if we could change that. |
| }, |
| ); |
| |
| let ext = self.r.compile_macro(def, *ident, &attrs, i.span, i.id, edition); |
| let macro_kinds = ext.macro_kinds(); |
| opt_syn_ext = Some(ext); |
| DefKind::Macro(macro_kinds) |
| } |
| ItemKind::GlobalAsm(..) => DefKind::GlobalAsm, |
| ItemKind::Use(_) => { |
| return self.with_owner(i.id, None, DefKind::Use, i.span, |this, feed| { |
| this.brg_visit_item(i, feed); |
| }); |
| } |
| ItemKind::MacCall(..) => { |
| self.visit_macro_invoc(i.id); |
| self.brg_visit_mac_call_in_module(i.id); |
| return; |
| } |
| ItemKind::DelegationMac(..) => unreachable!(), |
| }; |
| self.with_owner( |
| i.id, |
| i.kind.ident().map(|ident| ident.name), |
| def_kind, |
| i.span, |
| |this, feed| { |
| if let Some(ext) = opt_syn_ext { |
| this.r.local_macro_map.insert(feed.def_id(), self.r.arenas.alloc_macro(ext)); |
| } |
| |
| this.with_parent(feed.def_id(), |this| { |
| this.with_impl_trait(ImplTraitContext::Existential, |this| { |
| this.brg_visit_item(i, feed) |
| }) |
| }); |
| }, |
| ); |
| } |
| |
| fn visit_block(&mut self, block: &'a Block) { |
| self.brg_visit_block(block); |
| } |
| |
| fn visit_fn(&mut self, fn_kind: FnKind<'a>, _: &AttrVec, span: Span, _: NodeId) { |
| match fn_kind { |
| FnKind::Fn( |
| ctxt, |
| _vis, |
| Fn { |
| sig: FnSig { header, decl, span: _ }, ident, generics, contract, body, .. |
| }, |
| ) if let Some(coroutine_kind) = header.coroutine_kind |
| // Foreign ones are denied, so don't create them here. |
| && ctxt != visit::FnCtxt::Foreign => |
| { |
| self.visit_ident(ident); |
| self.visit_fn_header(header); |
| self.visit_generics(generics); |
| if let Some(contract) = contract { |
| self.visit_contract(contract); |
| } |
| |
| // For async functions, we need to create their inner defs inside of a |
| // closure to match their desugared representation. Besides that, |
| // we must mirror everything that `visit::walk_fn` below does. |
| let FnDecl { inputs, output } = &**decl; |
| for param in inputs { |
| self.visit_param(param); |
| } |
| |
| let (return_id, return_span) = coroutine_kind.return_id(); |
| let return_def = |
| self.create_def(return_id, None, DefKind::OpaqueTy, return_span).def_id(); |
| self.with_parent(return_def, |this| this.visit_fn_ret_ty(output)); |
| |
| // If this async fn has no body (i.e. it's an async fn signature in a trait) |
| // then the closure_def will never be used, and we should avoid generating a |
| // def-id for it. |
| if let Some(body) = body { |
| let closure_def = self |
| .create_def(coroutine_kind.closure_id(), None, DefKind::Closure, span) |
| .def_id(); |
| self.with_parent(closure_def, |this| this.visit_block(body)); |
| } |
| } |
| FnKind::Closure(binder, Some(coroutine_kind), decl, body) => { |
| self.visit_closure_binder(binder); |
| visit::walk_fn_decl(self, decl); |
| |
| // Async closures desugar to closures inside of closures, so |
| // we must create two defs. |
| let coroutine_def = self |
| .create_def(coroutine_kind.closure_id(), None, DefKind::Closure, span) |
| .def_id(); |
| self.with_parent(coroutine_def, |this| this.visit_expr(body)); |
| } |
| _ => visit::walk_fn(self, fn_kind), |
| } |
| } |
| |
| fn visit_foreign_item(&mut self, fi: &'a ForeignItem) { |
| let (ident, def_kind) = match fi.kind { |
| ForeignItemKind::Static(StaticItem { |
| ident, |
| ty: _, |
| mutability, |
| expr: _, |
| safety, |
| define_opaque: _, |
| eii_impls: _, |
| }) => { |
| let safety = match safety { |
| ast::Safety::Unsafe(_) | ast::Safety::Default => hir::Safety::Unsafe, |
| ast::Safety::Safe(_) => hir::Safety::Safe, |
| }; |
| |
| (ident, DefKind::Static { safety, mutability, nested: false }) |
| } |
| ForeignItemKind::Fn(Fn { ident, .. }) => (ident, DefKind::Fn), |
| ForeignItemKind::TyAlias(TyAlias { ident, .. }) => (ident, DefKind::ForeignTy), |
| ForeignItemKind::MacCall(_) => { |
| self.visit_invoc_in_module(fi.id); |
| self.visit_macro_invoc(fi.id); |
| return; |
| } |
| }; |
| |
| self.with_owner(fi.id, Some(ident.name), def_kind, fi.span, |this, def| { |
| this.with_parent(def.def_id(), |this| { |
| this.build_reduced_graph_for_foreign_item(fi, ident, def); |
| visit::walk_item(this, fi) |
| }); |
| }) |
| } |
| |
| fn visit_variant(&mut self, v: &'a Variant) { |
| if v.is_placeholder { |
| self.visit_macro_invoc(v.id); |
| self.visit_invoc_in_module(v.id); |
| return; |
| } |
| let feed = self.create_def(v.id, Some(v.ident.name), DefKind::Variant, v.span); |
| self.with_parent(feed.def_id(), |this| this.brg_visit_variant(v, feed)); |
| } |
| |
| fn visit_where_predicate(&mut self, pred: &'a WherePredicate) { |
| if pred.is_placeholder { |
| self.visit_macro_invoc(pred.id); |
| self.visit_invoc(pred.id); |
| } else { |
| visit::walk_where_predicate(self, pred) |
| } |
| } |
| |
| fn visit_variant_data(&mut self, data: &'a VariantData) { |
| // The assumption here is that non-`cfg` macro expansion cannot change field indices. |
| // It currently holds because only inert attributes are accepted on fields, |
| // and every such attribute expands into a single field after it's resolved. |
| for (index, field) in data.fields().iter().enumerate() { |
| self.collect_field(field, Some(index)); |
| } |
| } |
| |
| fn visit_generic_param(&mut self, param: &'a GenericParam) { |
| if param.is_placeholder { |
| self.visit_macro_invoc(param.id); |
| self.visit_invoc(param.id); |
| return; |
| } |
| let def_kind = match param.kind { |
| GenericParamKind::Lifetime { .. } => DefKind::LifetimeParam, |
| GenericParamKind::Type { .. } => DefKind::TyParam, |
| GenericParamKind::Const { .. } => DefKind::ConstParam, |
| }; |
| self.create_def(param.id, Some(param.ident.name), def_kind, param.ident.span); |
| |
| // impl-Trait can happen inside generic parameters, like |
| // ``` |
| // fn foo<U: Iterator<Item = impl Clone>>() {} |
| // ``` |
| // |
| // In that case, the impl-trait is lowered as an additional generic parameter. |
| self.with_impl_trait(ImplTraitContext::Universal, |this| { |
| visit::walk_generic_param(this, param) |
| }); |
| } |
| |
| fn visit_assoc_item(&mut self, i: &'a AssocItem, ctxt: visit::AssocCtxt) { |
| let (ident, def_kind, ns) = match &i.kind { |
| AssocItemKind::Fn(Fn { ident, .. }) |
| | AssocItemKind::Delegation(Delegation { ident, .. }) => { |
| (*ident, DefKind::AssocFn, ValueNS) |
| } |
| AssocItemKind::Const(ConstItem { ident, rhs_kind, .. }) => ( |
| *ident, |
| DefKind::AssocConst { |
| is_type_const: matches!(rhs_kind, ConstItemRhsKind::TypeConst { .. }), |
| }, |
| ValueNS, |
| ), |
| AssocItemKind::Type(TyAlias { ident, .. }) => (*ident, DefKind::AssocTy, TypeNS), |
| AssocItemKind::MacCall(..) => { |
| self.visit_macro_invoc(i.id); |
| self.visit_assoc_item_mac_call(i, ctxt); |
| return; |
| } |
| AssocItemKind::DelegationMac(..) => { |
| span_bug!(i.span, "degation mac invoc should have already been handled") |
| } |
| }; |
| |
| self.with_owner(i.id, Some(ident.name), def_kind, i.span, |this, feed| { |
| this.with_parent(feed.def_id(), |this| { |
| this.brg_visit_assoc_item(i, ctxt, ident, ns, feed) |
| }); |
| }) |
| } |
| |
| fn visit_pat(&mut self, pat: &'a Pat) { |
| match pat.kind { |
| PatKind::MacCall(..) => { |
| self.visit_macro_invoc(pat.id); |
| self.visit_invoc(pat.id); |
| } |
| _ => visit::walk_pat(self, pat), |
| } |
| } |
| |
| fn visit_anon_const(&mut self, constant: &'a AnonConst) { |
| // `MgcaDisambiguation::Direct` is set even when MGCA is disabled, so |
| // to avoid affecting stable we have to feature gate the not creating |
| // anon consts |
| if !self.r.tcx.features().min_generic_const_args() { |
| let parent = self |
| .create_def(constant.id, None, DefKind::AnonConst, constant.value.span) |
| .def_id(); |
| return self.with_parent(parent, |this| visit::walk_anon_const(this, constant)); |
| } |
| |
| match constant.mgca_disambiguation { |
| MgcaDisambiguation::Direct => self.with_const_arg(ConstArgContext::Direct, |this| { |
| visit::walk_anon_const(this, constant); |
| }), |
| MgcaDisambiguation::AnonConst => { |
| self.with_const_arg(ConstArgContext::NonDirect, |this| { |
| let parent = this |
| .create_def(constant.id, None, DefKind::AnonConst, constant.value.span) |
| .def_id(); |
| this.with_parent(parent, |this| visit::walk_anon_const(this, constant)); |
| }) |
| } |
| }; |
| } |
| |
| #[instrument(level = "debug", skip(self))] |
| fn visit_expr(&mut self, expr: &'a Expr) { |
| debug!(?self.invocation_parent); |
| |
| let parent_def = match &expr.kind { |
| ExprKind::MacCall(..) => { |
| self.visit_macro_invoc(expr.id); |
| self.visit_invoc(expr.id); |
| return; |
| } |
| ExprKind::Closure(..) | ExprKind::Gen(..) => { |
| self.create_def(expr.id, None, DefKind::Closure, expr.span).def_id() |
| } |
| ExprKind::ConstBlock(constant) => { |
| // Under `min_generic_const_args` a `const { }` block sometimes |
| // corresponds to an anon const rather than an inline const. |
| let def_kind = match self.invocation_parent.const_arg_context { |
| ConstArgContext::Direct => DefKind::AnonConst, |
| ConstArgContext::NonDirect => DefKind::InlineConst, |
| }; |
| |
| return self.with_const_arg(ConstArgContext::NonDirect, |this| { |
| for attr in &expr.attrs { |
| visit::walk_attribute(this, attr); |
| } |
| |
| let def = |
| this.create_def(constant.id, None, def_kind, constant.value.span).def_id(); |
| this.with_parent(def, |this| visit::walk_anon_const(this, constant)); |
| }); |
| } |
| |
| // Avoid overwriting `const_arg_context` as we may want to treat const blocks |
| // as being anon consts if we are inside a const argument. |
| ExprKind::Struct(_) | ExprKind::Call(..) | ExprKind::Tup(..) | ExprKind::Array(..) => { |
| return visit::walk_expr(self, expr); |
| } |
| // FIXME(mgca): we may want to handle block labels in some manner |
| ExprKind::Block(block, _) if let [stmt] = block.stmts.as_slice() => match stmt.kind { |
| // FIXME(mgca): this probably means that mac calls that expand |
| // to semi'd const blocks are handled differently to just writing |
| // out a semi'd const block. |
| StmtKind::Expr(..) | StmtKind::MacCall(..) => return visit::walk_expr(self, expr), |
| |
| // Fallback to normal behaviour |
| StmtKind::Let(..) | StmtKind::Item(..) | StmtKind::Semi(..) | StmtKind::Empty => { |
| self.invocation_parent.parent_def |
| } |
| }, |
| |
| _ => self.invocation_parent.parent_def, |
| }; |
| |
| self.with_const_arg(ConstArgContext::NonDirect, |this| { |
| // Note in some cases the `parent_def` here may be the existing parent |
| // and this is actually a no-op `with_parent` call. |
| this.with_parent(parent_def, |this| visit::walk_expr(this, expr)) |
| }) |
| } |
| |
| fn visit_ty(&mut self, ty: &'a Ty) { |
| match ty.kind { |
| TyKind::MacCall(..) => { |
| self.visit_macro_invoc(ty.id); |
| self.visit_invoc(ty.id); |
| } |
| TyKind::ImplTrait(opaque_id, _) => { |
| let name = *self |
| .r |
| .impl_trait_names |
| .get(&ty.id) |
| .unwrap_or_else(|| span_bug!(ty.span, "expected this opaque to be named")); |
| let kind = match self.invocation_parent.impl_trait_context { |
| ImplTraitContext::Universal => DefKind::TyParam, |
| ImplTraitContext::Existential => DefKind::OpaqueTy, |
| ImplTraitContext::InBinding => return visit::walk_ty(self, ty), |
| }; |
| let id = self.create_def(opaque_id, Some(name), kind, ty.span).def_id(); |
| match self.invocation_parent.impl_trait_context { |
| // Do not nest APIT, as we desugar them as `impl_trait: bounds`, |
| // so the `impl_trait` node is not a parent to `bounds`. |
| ImplTraitContext::Universal => visit::walk_ty(self, ty), |
| ImplTraitContext::Existential => { |
| self.with_parent(id, |this| visit::walk_ty(this, ty)) |
| } |
| ImplTraitContext::InBinding => unreachable!(), |
| }; |
| } |
| _ => visit::walk_ty(self, ty), |
| } |
| } |
| |
| fn visit_stmt(&mut self, stmt: &'a Stmt) { |
| match stmt.kind { |
| StmtKind::MacCall(..) => { |
| self.brg_visit_mac_call_in_module(stmt.id); |
| self.visit_macro_invoc(stmt.id) |
| } |
| // FIXME(impl_trait_in_bindings): We don't really have a good way of |
| // introducing the right `ImplTraitContext` here for all the cases we |
| // care about, in case we want to introduce ITIB to other positions |
| // such as turbofishes (e.g. `foo::<impl Fn()>(|| {})`). |
| StmtKind::Let(ref local) => self.with_impl_trait(ImplTraitContext::InBinding, |this| { |
| visit::walk_local(this, local) |
| }), |
| _ => visit::walk_stmt(self, stmt), |
| } |
| } |
| |
| fn visit_arm(&mut self, arm: &'a Arm) { |
| if arm.is_placeholder { |
| self.visit_macro_invoc(arm.id); |
| self.visit_invoc(arm.id); |
| } else { |
| visit::walk_arm(self, arm) |
| } |
| } |
| |
| fn visit_expr_field(&mut self, f: &'a ExprField) { |
| if f.is_placeholder { |
| self.visit_macro_invoc(f.id); |
| self.visit_invoc(f.id); |
| } else { |
| visit::walk_expr_field(self, f) |
| } |
| } |
| |
| fn visit_pat_field(&mut self, fp: &'a PatField) { |
| if fp.is_placeholder { |
| self.visit_macro_invoc(fp.id); |
| self.visit_invoc(fp.id); |
| } else { |
| visit::walk_pat_field(self, fp) |
| } |
| } |
| |
| fn visit_param(&mut self, p: &'a Param) { |
| if p.is_placeholder { |
| self.visit_macro_invoc(p.id); |
| self.visit_invoc(p.id); |
| } else { |
| self.with_impl_trait(ImplTraitContext::Universal, |this| visit::walk_param(this, p)) |
| } |
| } |
| |
| // This method is called only when we are visiting an individual field |
| // after expanding an attribute on it. |
| fn visit_field_def(&mut self, field: &'a FieldDef) { |
| self.collect_field(field, None); |
| } |
| |
| fn visit_crate(&mut self, krate: &'a Crate) { |
| if krate.is_placeholder { |
| self.visit_macro_invoc(krate.id); |
| self.visit_invoc_in_module(krate.id); |
| } else { |
| // Visit attributes after items for backward compatibility. |
| // This way they can use `macro_rules` defined later. |
| |
| // We always have an invocation parent (set in `collect_definitions`) |
| // of at least the crate root, even for visiting the crate root, |
| // which would then remove the crate root from the tables |
| // list twice and try to insert it twice afterwards. |
| debug_assert_eq!(self.r.current_owner.id, CRATE_NODE_ID); |
| |
| visit::walk_list!(self, visit_item, &krate.items); |
| visit::walk_list!(self, visit_attribute, &krate.attrs); |
| self.contains_macro_use(&krate.attrs); |
| } |
| } |
| |
| fn visit_attribute(&mut self, attr: &'a Attribute) { |
| let orig_in_attr = mem::replace(&mut self.invocation_parent.in_attr, true); |
| if !attr.is_doc_comment() && attr::is_builtin_attr(attr) { |
| self.r |
| .builtin_attrs |
| .push((attr.get_normal_item().path.segments[0].ident, self.parent_scope)); |
| } |
| visit::walk_attribute(self, attr); |
| self.invocation_parent.in_attr = orig_in_attr; |
| } |
| |
| fn visit_inline_asm(&mut self, asm: &'a InlineAsm) { |
| let InlineAsm { |
| asm_macro: _, |
| template: _, |
| template_strs: _, |
| operands, |
| clobber_abis: _, |
| options: _, |
| line_spans: _, |
| } = asm; |
| for (op, _span) in operands { |
| match op { |
| InlineAsmOperand::In { expr, reg: _ } |
| | InlineAsmOperand::Out { expr: Some(expr), reg: _, late: _ } |
| | InlineAsmOperand::InOut { expr, reg: _, late: _ } => { |
| self.visit_expr(expr); |
| } |
| InlineAsmOperand::Out { expr: None, reg: _, late: _ } => {} |
| InlineAsmOperand::SplitInOut { in_expr, out_expr, reg: _, late: _ } => { |
| self.visit_expr(in_expr); |
| if let Some(expr) = out_expr { |
| self.visit_expr(expr); |
| } |
| } |
| InlineAsmOperand::Const { anon_const } => { |
| let def = self |
| .create_def( |
| anon_const.id, |
| None, |
| DefKind::InlineConst, |
| anon_const.value.span, |
| ) |
| .def_id(); |
| self.with_parent(def, |this| visit::walk_anon_const(this, anon_const)); |
| } |
| InlineAsmOperand::Sym { sym } => self.visit_inline_asm_sym(sym), |
| InlineAsmOperand::Label { block } => self.visit_block(block), |
| } |
| } |
| } |
| } |
