Struct rustc_passes::dead::MarkSymbolVisitor

struct MarkSymbolVisitor<'tcx> {
    worklist: Vec<HirId>,
    tcx: TyCtxt<'tcx>,
    maybe_typeck_results: Option<&'tcx TypeckResults<'tcx>>,
    live_symbols: FxHashSet<HirId>,
    repr_has_repr_c: bool,
    in_pat: bool,
    inherited_pub_visibility: bool,
    ignore_variant_stack: Vec<DefId>,
    struct_constructors: FxHashMap<HirId, HirId>,
}

Fields

worklist: Vec<HirId>

tcx: TyCtxt<'tcx>

maybe_typeck_results: Option<&'tcx TypeckResults<'tcx>>

live_symbols: FxHashSet<HirId>

repr_has_repr_c: bool

in_pat: bool

inherited_pub_visibility: bool

ignore_variant_stack: Vec<DefId>

struct_constructors: FxHashMap<HirId, HirId>

Implementations

impl<'tcx> MarkSymbolVisitor<'tcx>

fn typeck_results(&self) -> &'tcx TypeckResults<'tcx>

Gets the type-checking results for the current body. As this will ICE if called outside bodies, only call when working with Expr or Pat nodes (they are guaranteed to be found only in bodies).

fn check_def_id(&mut self, def_id: DefId)

fn insert_def_id(&mut self, def_id: DefId)

fn handle_res(&mut self, res: Res)

fn lookup_and_handle_method(&mut self, id: HirId)

fn handle_field_access(&mut self, lhs: &Expr<'_>, hir_id: HirId)

fn handle_field_pattern_match(
    &mut self,
    lhs: &Pat<'_>,
    res: Res,
    pats: &[FieldPat<'_>]
)

fn mark_live_symbols(&mut self)

fn visit_node(&mut self, node: Node<'tcx>)

fn mark_as_used_if_union(&mut self, adt: &AdtDef, fields: &[Field<'_>])

Trait Implementations

impl<'tcx> Visitor<'tcx> for MarkSymbolVisitor<'tcx>

type Map = ErasedMap<'tcx>

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

The default versions of the visit_nested_XXX routines invoke this method to get a map to use. By selecting an enum variant, you control which kinds of nested HIR are visited; see NestedVisitorMap for details. By "nested HIR", we are referring to bits of HIR that are not directly embedded within one another but rather indirectly, through a table in the crate. This is done to control dependencies during incremental compilation: the non-inline bits of HIR can be tracked and hashed separately.

fn visit_nested_body(&mut self, body: 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_variant_data(
    &mut self,
    def: &'tcx VariantData<'tcx>,
    _: Symbol,
    _: &Generics<'_>,
    _: HirId,
    _: Span
)

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

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

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

fn visit_path(&mut self, path: &'tcx Path<'tcx>, _: HirId)

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

fn visit_anon_const(&mut self, c: &'tcx AnonConst)

fn visit_nested_item(&mut self, id: 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, 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, id: ImplItemId)

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

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

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

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

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 a "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_foreign_item(&mut self, i: &'v ForeignItem<'v>)

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

fn visit_block(&mut self, b: &'v Block<'v>)

fn visit_stmt(&mut self, s: &'v Stmt<'v>)

fn visit_generic_param(&mut self, p: &'v GenericParam<'v>)

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

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

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

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

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

fn visit_impl_item_ref(&mut self, ii: &'v ImplItemRef<'v>)

fn visit_trait_ref(&mut self, t: &'v TraitRef<'v>)

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_struct_field(&mut self, s: &'v StructField<'v>)

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

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

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

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

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

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

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

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, _attr: &'v Attribute)

fn visit_macro_def(&mut self, macro_def: &'v MacroDef<'v>)

fn visit_vis(&mut self, vis: &'v Spanned<VisibilityKind<'v>>)

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

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