Struct rustc_ast_lowering::index::NodeCollector

pub(crate) struct NodeCollector<'a, 'hir> {
    source_map: &'a SourceMap,
    bodies: &'a IndexVec<ItemLocalId, Option<&'hir Body<'hir>>>,
    nodes: IndexVec<ItemLocalId, Option<ParentedNode<'hir>>>,
    parenting: FxHashMap<LocalDefId, ItemLocalId>,
    parent_node: ItemLocalId,
    owner: LocalDefId,
    definitions: &'a Definitions,
}

A visitor that walks over the HIR and collects Nodes into a HIR map.

Fields

source_map: &'a SourceMap

Source map

bodies: &'a IndexVec<ItemLocalId, Option<&'hir Body<'hir>>>

nodes: IndexVec<ItemLocalId, Option<ParentedNode<'hir>>>

Outputs

parenting: FxHashMap<LocalDefId, ItemLocalId>

parent_node: ItemLocalId

The parent of this node

owner: LocalDefId

definitions: &'a Definitions

Implementations

impl<'a, 'hir> NodeCollector<'a, 'hir>

fn insert(&mut self, span: Span, hir_id: HirId, node: Node<'hir>)

fn with_parent<F: FnOnce(&mut Self)>(&mut self, parent_node_id: HirId, f: F)

fn insert_nested(&mut self, item: LocalDefId)

Trait Implementations

impl<'a, 'hir> Visitor<'hir> for NodeCollector<'a, 'hir>

fn nested_visit_map(&mut self) -> NestedVisitorMap<Self::Map>

Because we want to track parent items and so forth, enable deep walking so that we walk nested items in the context of their outer items.

type Map = !

fn visit_nested_item(&mut self, item: ItemId)

Invoked when a nested item is encountered. By default does nothing unless you override nested_visit_map to return other than None, in which case it will walk the item. You probably don’t want to override this method – instead, override nested_visit_map or use the “shallow” or “deep” visit patterns described on itemlikevisit::ItemLikeVisitor. The only reason to override this method is if you want a nested pattern but cannot supply a Map; see nested_visit_map for advice.

fn visit_nested_trait_item(&mut self, item_id: TraitItemId)

Like visit_nested_item(), but for trait items. See visit_nested_item() for advice on when to override this method.

fn visit_nested_impl_item(&mut self, item_id: ImplItemId)

Like visit_nested_item(), but for impl items. See visit_nested_item() for advice on when to override this method.

fn visit_nested_foreign_item(&mut self, foreign_id: ForeignItemId)

Like visit_nested_item(), but for foreign items. See visit_nested_item() for advice on when to override this method.

fn visit_nested_body(&mut self, id: BodyId)

Invoked to visit the body of a function, method or closure. Like visit_nested_item, does nothing by default unless you override nested_visit_map to return other than None, in which case it will walk the body.

fn visit_param(&mut self, param: &'hir Param<'hir>)

fn visit_item(&mut self, i: &'hir Item<'hir>)

Visits the top-level item and (optionally) nested items / impl items. See visit_nested_item for details.

fn visit_foreign_item(&mut self, fi: &'hir ForeignItem<'hir>)

fn visit_generic_param(&mut self, param: &'hir GenericParam<'hir>)

fn visit_const_param_default(&mut self, param: HirId, ct: &'hir AnonConst)

fn visit_trait_item(&mut self, ti: &'hir TraitItem<'hir>)

fn visit_impl_item(&mut self, ii: &'hir ImplItem<'hir>)

fn visit_pat(&mut self, pat: &'hir Pat<'hir>)

fn visit_arm(&mut self, arm: &'hir Arm<'hir>)

fn visit_anon_const(&mut self, constant: &'hir AnonConst)

fn visit_expr(&mut self, expr: &'hir Expr<'hir>)

fn visit_stmt(&mut self, stmt: &'hir Stmt<'hir>)

fn visit_path_segment(
    &mut self,
    path_span: Span,
    path_segment: &'hir PathSegment<'hir>
)

fn visit_ty(&mut self, ty: &'hir Ty<'hir>)

fn visit_infer(&mut self, inf: &'hir InferArg)

fn visit_trait_ref(&mut self, tr: &'hir TraitRef<'hir>)

fn visit_fn(
    &mut self,
    fk: FnKind<'hir>,
    fd: &'hir FnDecl<'hir>,
    b: BodyId,
    s: Span,
    id: HirId
)

fn visit_block(&mut self, block: &'hir Block<'hir>)

fn visit_local(&mut self, l: &'hir Local<'hir>)

fn visit_lifetime(&mut self, lifetime: &'hir Lifetime)

fn visit_vis(&mut self, visibility: &'hir Visibility<'hir>)

fn visit_variant(
    &mut self,
    v: &'hir Variant<'hir>,
    g: &'hir Generics<'hir>,
    item_id: HirId
)

fn visit_field_def(&mut self, field: &'hir FieldDef<'hir>)

fn visit_trait_item_ref(&mut self, ii: &'hir TraitItemRef)

fn visit_impl_item_ref(&mut self, ii: &'hir ImplItemRef)

fn visit_foreign_item_ref(&mut self, fi: &'hir ForeignItemRef)

fn visit_body(&mut self, b: &'v Body<'v>)

fn as_deep_visitor(&mut self) -> DeepVisitor<'_, Self>

When invoking visit_all_item_likes(), you need to supply an item-like visitor. This method converts an “intra-visit” visitor into an item-like visitor that walks the entire tree. If you use this, you probably don’t want to process the contents of nested item-like things, since the outer loop will visit them as well.

fn visit_id(&mut self, _hir_id: HirId)

fn visit_name(&mut self, _span: Span, _name: Symbol)

fn visit_ident(&mut self, ident: Ident)

fn visit_mod(&mut self, m: &'v Mod<'v>, _s: Span, n: HirId)

fn visit_generics(&mut self, g: &'v Generics<'v>)

fn visit_where_predicate(&mut self, predicate: &'v WherePredicate<'v>)

fn visit_fn_decl(&mut self, fd: &'v FnDecl<'v>)

fn visit_use(&mut self, path: &'v Path<'v>, hir_id: HirId)

fn visit_param_bound(&mut self, bounds: &'v GenericBound<'v>)

fn visit_poly_trait_ref(
    &mut self,
    t: &'v PolyTraitRef<'v>,
    m: TraitBoundModifier
)

fn visit_variant_data(
    &mut self,
    s: &'v VariantData<'v>,
    Symbol,
    &'v Generics<'v>,
    _parent_id: HirId,
    Span
)

fn visit_enum_def(
    &mut self,
    enum_definition: &'v EnumDef<'v>,
    generics: &'v Generics<'v>,
    item_id: HirId,
    Span
)

fn visit_label(&mut self, label: &'v Label)

fn visit_generic_arg(&mut self, generic_arg: &'v GenericArg<'v>)

fn visit_qpath(&mut self, qpath: &'v QPath<'v>, id: HirId, span: Span)

fn visit_path(&mut self, path: &'v Path<'v>, _id: HirId)

fn visit_generic_args(
    &mut self,
    path_span: Span,
    generic_args: &'v GenericArgs<'v>
)

fn visit_assoc_type_binding(&mut self, type_binding: &'v TypeBinding<'v>)

fn visit_attribute(&mut self, _id: HirId, _attr: &'v Attribute)

fn visit_associated_item_kind(&mut self, kind: &'v AssocItemKind)

fn visit_defaultness(&mut self, defaultness: &'v Defaultness)

Layout

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference’s “Type Layout” chapter for details on type layout guarantees.

Size: 88 bytes