Struct rustc_passes::dead::MarkSymbolVisitor

struct MarkSymbolVisitor<'tcx> {
    worklist: Vec<LocalDefId>,
    tcx: TyCtxt<'tcx>,
    maybe_typeck_results: Option<&'tcx TypeckResults<'tcx>>,
    live_symbols: FxHashSet<LocalDefId>,
    repr_has_repr_c: bool,
    repr_has_repr_simd: bool,
    in_pat: bool,
    ignore_variant_stack: Vec<DefId>,
    struct_constructors: FxHashMap<LocalDefId, LocalDefId>,
    ignored_derived_traits: FxHashMap<LocalDefId, Vec<(DefId, DefId)>>,
}

Fields

worklist: Vec<LocalDefId>

tcx: TyCtxt<'tcx>

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

live_symbols: FxHashSet<LocalDefId>

repr_has_repr_c: bool

repr_has_repr_simd: bool

in_pat: bool

ignore_variant_stack: Vec<DefId>

struct_constructors: FxHashMap<LocalDefId, LocalDefId>

ignored_derived_traits: FxHashMap<LocalDefId, Vec<(DefId, DefId)>>

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 check_for_self_assign(&mut self, assign: &'tcx Expr<'tcx>)

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

fn handle_tuple_field_pattern_match(
    &mut self,
    lhs: &Pat<'_>,
    res: Res,
    pats: &[Pat<'_>],
    dotdot: DotDotPos
)

fn mark_live_symbols(&mut self)

fn should_ignore_item(&mut self, def_id: DefId) -> bool

Automatically generated items marked with rustc_trivial_field_reads will be ignored for the purposes of dead code analysis (see PR #85200 for discussion).

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

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

Trait Implementations

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

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 Self::NestedFilter.

fn visit_variant_data(&mut self, def: &'tcx VariantData<'tcx>)

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: &Path<'tcx>, _: HirId)

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

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

type Map = <Self::NestedFilter as NestedFilter<'v>>::Map

type NestedFilter = None

Override this type to control which nested HIR are visited; see NestedFilter for details. If you override this type, you must also override nested_visit_map.

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

If type NestedFilter is set to visit nested items, this method must also be overridden to provide a map to retrieve nested items.

fn visit_nested_item(&mut self, id: ItemId)

Invoked when a nested item is encountered. By default, when Self::NestedFilter is nested_filter::None, this method does nothing. You probably don’t want to override this method – instead, override Self::NestedFilter 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_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.

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 visit_id(&mut self, _hir_id: HirId)

fn visit_name(&mut self, _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_pat_field(&mut self, f: &'v PatField<'v>)

fn visit_array_length(&mut self, len: &'v ArrayLen)

fn visit_let_expr(&mut self, lex: &'v Let<'v>)

fn visit_expr_field(&mut self, field: &'v ExprField<'v>)

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

fn visit_const_param_default(&mut self, _param: HirId, ct: &'v AnonConst)

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

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

fn visit_fn_ret_ty(&mut self, ret_ty: &'v FnRetTy<'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,
    _: Span,
    id: HirId
)

fn visit_use(
    &mut self,
    path: &'v Path<'v, SmallVec<[Res<HirId>; 3]>>,
    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_foreign_item_ref(&mut self, ii: &'v ForeignItemRef)

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

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>)

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

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

fn visit_variant(&mut self, v: &'v Variant<'v>)

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

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

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_segment: &'v PathSegment<'v>)

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

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

fn visit_inline_asm(&mut self, asm: &'v InlineAsm<'v>, id: HirId)

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: 168 bytes