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

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

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: &[ExprField<'_>])

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)

pub 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.

pub 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.

pub 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.

pub fn visit_nested_foreign_item(&mut self, id: ForeignItemId)

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

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

pub 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.

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

pub 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.

pub fn visit_id(&mut self, _hir_id: HirId)

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

pub fn visit_ident(&mut self, ident: Ident)

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

pub fn visit_foreign_item(&mut self, i: &'v ForeignItem<'v>)

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

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

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

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

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

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

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

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

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

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

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

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

pub fn visit_foreign_item_ref(&mut self, ii: &'v ForeignItemRef<'v>)

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

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

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

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

pub fn visit_field_def(&mut self, s: &'v FieldDef<'v>)

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

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

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

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

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

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

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

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

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

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

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

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

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

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