| use hir::map::definitions::*; |
| use hir::def_id::{CRATE_DEF_INDEX, DefIndex, DefIndexAddressSpace}; |
| use session::CrateDisambiguator; |
| |
| use syntax::ast::*; |
| use syntax::ext::hygiene::Mark; |
| use syntax::visit; |
| use syntax::symbol::keywords; |
| use syntax::symbol::Symbol; |
| use syntax::parse::token::{self, Token}; |
| use syntax_pos::Span; |
| |
| use hir::map::{ITEM_LIKE_SPACE, REGULAR_SPACE}; |
| |
| /// Creates def ids for nodes in the AST. |
| pub struct DefCollector<'a> { |
| definitions: &'a mut Definitions, |
| parent_def: Option<DefIndex>, |
| expansion: Mark, |
| pub visit_macro_invoc: Option<&'a mut dyn FnMut(MacroInvocationData)>, |
| } |
| |
| pub struct MacroInvocationData { |
| pub mark: Mark, |
| pub def_index: DefIndex, |
| } |
| |
| impl<'a> DefCollector<'a> { |
| pub fn new(definitions: &'a mut Definitions, expansion: Mark) -> Self { |
| DefCollector { |
| definitions, |
| expansion, |
| parent_def: None, |
| visit_macro_invoc: None, |
| } |
| } |
| |
| pub fn collect_root(&mut self, |
| crate_name: &str, |
| crate_disambiguator: CrateDisambiguator) { |
| let root = self.definitions.create_root_def(crate_name, |
| crate_disambiguator); |
| assert_eq!(root, CRATE_DEF_INDEX); |
| self.parent_def = Some(root); |
| } |
| |
| fn create_def(&mut self, |
| node_id: NodeId, |
| data: DefPathData, |
| address_space: DefIndexAddressSpace, |
| span: Span) |
| -> DefIndex { |
| let parent_def = self.parent_def.unwrap(); |
| debug!("create_def(node_id={:?}, data={:?}, parent_def={:?})", node_id, data, parent_def); |
| self.definitions |
| .create_def_with_parent(parent_def, node_id, data, address_space, self.expansion, span) |
| } |
| |
| pub fn with_parent<F: FnOnce(&mut Self)>(&mut self, parent_def: DefIndex, f: F) { |
| let parent = self.parent_def; |
| self.parent_def = Some(parent_def); |
| f(self); |
| self.parent_def = parent; |
| } |
| |
| fn visit_async_fn( |
| &mut self, |
| id: NodeId, |
| name: Name, |
| span: Span, |
| header: &FnHeader, |
| generics: &'a Generics, |
| decl: &'a FnDecl, |
| body: &'a Block, |
| ) { |
| let (closure_id, return_impl_trait_id) = match header.asyncness { |
| IsAsync::Async { |
| closure_id, |
| return_impl_trait_id, |
| } => (closure_id, return_impl_trait_id), |
| _ => unreachable!(), |
| }; |
| |
| // For async functions, we need to create their inner defs inside of a |
| // closure to match their desugared representation. |
| let fn_def_data = DefPathData::ValueNs(name.as_interned_str()); |
| let fn_def = self.create_def(id, fn_def_data, ITEM_LIKE_SPACE, span); |
| return self.with_parent(fn_def, |this| { |
| this.create_def(return_impl_trait_id, DefPathData::ImplTrait, REGULAR_SPACE, span); |
| |
| visit::walk_generics(this, generics); |
| visit::walk_fn_decl(this, decl); |
| |
| let closure_def = this.create_def(closure_id, |
| DefPathData::ClosureExpr, |
| REGULAR_SPACE, |
| span); |
| this.with_parent(closure_def, |this| { |
| visit::walk_block(this, body); |
| }) |
| }) |
| } |
| |
| fn visit_macro_invoc(&mut self, id: NodeId) { |
| if let Some(ref mut visit) = self.visit_macro_invoc { |
| visit(MacroInvocationData { |
| mark: id.placeholder_to_mark(), |
| def_index: self.parent_def.unwrap(), |
| }) |
| } |
| } |
| } |
| |
| impl<'a> visit::Visitor<'a> for DefCollector<'a> { |
| fn visit_item(&mut self, i: &'a Item) { |
| debug!("visit_item: {:?}", i); |
| |
| // Pick the def data. This need not be unique, but the more |
| // information we encapsulate into, the better |
| let def_data = match i.node { |
| ItemKind::Impl(..) => DefPathData::Impl, |
| ItemKind::Trait(..) => DefPathData::Trait(i.ident.as_interned_str()), |
| ItemKind::Enum(..) | ItemKind::Struct(..) | ItemKind::Union(..) | |
| ItemKind::TraitAlias(..) | ItemKind::Existential(..) | |
| ItemKind::ExternCrate(..) | ItemKind::ForeignMod(..) | ItemKind::Ty(..) => |
| DefPathData::TypeNs(i.ident.as_interned_str()), |
| ItemKind::Mod(..) if i.ident == keywords::Invalid.ident() => { |
| return visit::walk_item(self, i); |
| } |
| ItemKind::Fn( |
| ref decl, |
| ref header @ FnHeader { asyncness: IsAsync::Async { .. }, .. }, |
| ref generics, |
| ref body, |
| ) => { |
| return self.visit_async_fn( |
| i.id, |
| i.ident.name, |
| i.span, |
| header, |
| generics, |
| decl, |
| body, |
| ) |
| } |
| ItemKind::Mod(..) => DefPathData::Module(i.ident.as_interned_str()), |
| ItemKind::Static(..) | ItemKind::Const(..) | ItemKind::Fn(..) => |
| DefPathData::ValueNs(i.ident.as_interned_str()), |
| ItemKind::MacroDef(..) => DefPathData::MacroDef(i.ident.as_interned_str()), |
| ItemKind::Mac(..) => return self.visit_macro_invoc(i.id), |
| ItemKind::GlobalAsm(..) => DefPathData::Misc, |
| ItemKind::Use(..) => { |
| return visit::walk_item(self, i); |
| } |
| }; |
| let def = self.create_def(i.id, def_data, ITEM_LIKE_SPACE, i.span); |
| |
| self.with_parent(def, |this| { |
| match i.node { |
| ItemKind::Struct(ref struct_def, _) | ItemKind::Union(ref struct_def, _) => { |
| // If this is a tuple-like struct, register the constructor. |
| if !struct_def.is_struct() { |
| this.create_def(struct_def.id(), |
| DefPathData::StructCtor, |
| REGULAR_SPACE, |
| i.span); |
| } |
| } |
| _ => {} |
| } |
| visit::walk_item(this, i); |
| }); |
| } |
| |
| fn visit_use_tree(&mut self, use_tree: &'a UseTree, id: NodeId, _nested: bool) { |
| self.create_def(id, DefPathData::Misc, ITEM_LIKE_SPACE, use_tree.span); |
| visit::walk_use_tree(self, use_tree, id); |
| } |
| |
| fn visit_foreign_item(&mut self, foreign_item: &'a ForeignItem) { |
| if let ForeignItemKind::Macro(_) = foreign_item.node { |
| return self.visit_macro_invoc(foreign_item.id); |
| } |
| |
| let def = self.create_def(foreign_item.id, |
| DefPathData::ValueNs(foreign_item.ident.as_interned_str()), |
| REGULAR_SPACE, |
| foreign_item.span); |
| |
| self.with_parent(def, |this| { |
| visit::walk_foreign_item(this, foreign_item); |
| }); |
| } |
| |
| fn visit_variant(&mut self, v: &'a Variant, g: &'a Generics, item_id: NodeId) { |
| let def = self.create_def(v.node.data.id(), |
| DefPathData::EnumVariant(v.node.ident.as_interned_str()), |
| REGULAR_SPACE, |
| v.span); |
| self.with_parent(def, |this| visit::walk_variant(this, v, g, item_id)); |
| } |
| |
| fn visit_variant_data(&mut self, data: &'a VariantData, _: Ident, |
| _: &'a Generics, _: NodeId, _: Span) { |
| for (index, field) in data.fields().iter().enumerate() { |
| let name = field.ident.map(|ident| ident.name) |
| .unwrap_or_else(|| Symbol::intern(&index.to_string())); |
| let def = self.create_def(field.id, |
| DefPathData::Field(name.as_interned_str()), |
| REGULAR_SPACE, |
| field.span); |
| self.with_parent(def, |this| this.visit_struct_field(field)); |
| } |
| } |
| |
| fn visit_generic_param(&mut self, param: &'a GenericParam) { |
| let name = param.ident.as_interned_str(); |
| let def_path_data = match param.kind { |
| GenericParamKind::Lifetime { .. } => DefPathData::LifetimeParam(name), |
| GenericParamKind::Type { .. } => DefPathData::TypeParam(name), |
| }; |
| self.create_def(param.id, def_path_data, REGULAR_SPACE, param.ident.span); |
| |
| visit::walk_generic_param(self, param); |
| } |
| |
| fn visit_trait_item(&mut self, ti: &'a TraitItem) { |
| let def_data = match ti.node { |
| TraitItemKind::Method(..) | TraitItemKind::Const(..) => |
| DefPathData::ValueNs(ti.ident.as_interned_str()), |
| TraitItemKind::Type(..) => { |
| DefPathData::AssocTypeInTrait(ti.ident.as_interned_str()) |
| }, |
| TraitItemKind::Macro(..) => return self.visit_macro_invoc(ti.id), |
| }; |
| |
| let def = self.create_def(ti.id, def_data, ITEM_LIKE_SPACE, ti.span); |
| self.with_parent(def, |this| visit::walk_trait_item(this, ti)); |
| } |
| |
| fn visit_impl_item(&mut self, ii: &'a ImplItem) { |
| let def_data = match ii.node { |
| ImplItemKind::Method(MethodSig { |
| header: ref header @ FnHeader { asyncness: IsAsync::Async { .. }, .. }, |
| ref decl, |
| }, ref body) => { |
| return self.visit_async_fn( |
| ii.id, |
| ii.ident.name, |
| ii.span, |
| header, |
| &ii.generics, |
| decl, |
| body, |
| ) |
| } |
| ImplItemKind::Method(..) | ImplItemKind::Const(..) => |
| DefPathData::ValueNs(ii.ident.as_interned_str()), |
| ImplItemKind::Type(..) => DefPathData::AssocTypeInImpl(ii.ident.as_interned_str()), |
| ImplItemKind::Existential(..) => { |
| DefPathData::AssocExistentialInImpl(ii.ident.as_interned_str()) |
| }, |
| ImplItemKind::Macro(..) => return self.visit_macro_invoc(ii.id), |
| }; |
| |
| let def = self.create_def(ii.id, def_data, ITEM_LIKE_SPACE, ii.span); |
| self.with_parent(def, |this| visit::walk_impl_item(this, ii)); |
| } |
| |
| fn visit_pat(&mut self, pat: &'a Pat) { |
| match pat.node { |
| PatKind::Mac(..) => return self.visit_macro_invoc(pat.id), |
| _ => visit::walk_pat(self, pat), |
| } |
| } |
| |
| fn visit_anon_const(&mut self, constant: &'a AnonConst) { |
| let def = self.create_def(constant.id, |
| DefPathData::AnonConst, |
| REGULAR_SPACE, |
| constant.value.span); |
| self.with_parent(def, |this| visit::walk_anon_const(this, constant)); |
| } |
| |
| fn visit_expr(&mut self, expr: &'a Expr) { |
| let parent_def = self.parent_def; |
| |
| match expr.node { |
| ExprKind::Mac(..) => return self.visit_macro_invoc(expr.id), |
| ExprKind::Closure(_, asyncness, ..) => { |
| let closure_def = self.create_def(expr.id, |
| DefPathData::ClosureExpr, |
| REGULAR_SPACE, |
| expr.span); |
| self.parent_def = Some(closure_def); |
| |
| // Async closures desugar to closures inside of closures, so |
| // we must create two defs. |
| if let IsAsync::Async { closure_id, .. } = asyncness { |
| let async_def = self.create_def(closure_id, |
| DefPathData::ClosureExpr, |
| REGULAR_SPACE, |
| expr.span); |
| self.parent_def = Some(async_def); |
| } |
| } |
| ExprKind::Async(_, async_id, _) => { |
| let async_def = self.create_def(async_id, |
| DefPathData::ClosureExpr, |
| REGULAR_SPACE, |
| expr.span); |
| self.parent_def = Some(async_def); |
| } |
| _ => {} |
| }; |
| |
| visit::walk_expr(self, expr); |
| self.parent_def = parent_def; |
| } |
| |
| fn visit_ty(&mut self, ty: &'a Ty) { |
| match ty.node { |
| TyKind::Mac(..) => return self.visit_macro_invoc(ty.id), |
| TyKind::ImplTrait(node_id, _) => { |
| self.create_def(node_id, DefPathData::ImplTrait, REGULAR_SPACE, ty.span); |
| } |
| _ => {} |
| } |
| visit::walk_ty(self, ty); |
| } |
| |
| fn visit_stmt(&mut self, stmt: &'a Stmt) { |
| match stmt.node { |
| StmtKind::Mac(..) => self.visit_macro_invoc(stmt.id), |
| _ => visit::walk_stmt(self, stmt), |
| } |
| } |
| |
| fn visit_token(&mut self, t: Token) { |
| if let Token::Interpolated(nt) = t { |
| if let token::NtExpr(ref expr) = nt.0 { |
| if let ExprKind::Mac(..) = expr.node { |
| self.visit_macro_invoc(expr.id); |
| } |
| } |
| } |
| } |
| } |