Struct StatCollector

struct StatCollector<'k> {
    tcx: Option<TyCtxt<'k>>,
    nodes: FxHashMap<&'static str, Node>,
    seen: FxHashSet<HirId>,
}

This type measures the size of AST and HIR nodes, by implementing the AST and HIR Visitor traits. But we don’t measure every visited type because that could cause double counting.

For example, ast::Visitor has visit_ident, but Idents are always stored inline within other AST nodes, so we don’t implement visit_ident here. In contrast, we do implement visit_expr because ast::Expr is always stored as P<ast::Expr>, and every such expression should be measured separately.

In general, a visit_foo method should be implemented here if the corresponding Foo type is always stored on its own, e.g.: P<Foo>, Box<Foo>, Vec<Foo>, Box<[Foo]>.

There are some types in the AST and HIR tree that the visitors do not have a visit_* method for, and so we cannot measure these, which is unfortunate.

Fields

tcx: Option<TyCtxt<'k>>

nodes: FxHashMap<&'static str, Node>

seen: FxHashSet<HirId>

Implementations

impl<'k> StatCollector<'k>

fn record<T>(&mut self, label: &'static str, id: Option<HirId>, val: &T)

fn record_variant<T>( &mut self, label1: &'static str, label2: &'static str, id: Option<HirId>, val: &T, )

fn record_inner<T>( &mut self, label1: &'static str, label2: Option<&'static str>, id: Option<HirId>, val: &T, )

fn print(&self, tcx: TyCtxt<'_>, title: &str, prefix: &str)

Trait Implementations

impl<'v> Visitor<'v> for StatCollector<'v>

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

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 at rustc_hir::intravisit. The only reason to override this method is if you want a nested pattern but cannot supply a TyCtxt; see maybe_tcx for advice.

fn visit_nested_trait_item(&mut self, trait_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, impl_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, 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, body_id: 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_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: &Body<'v>)

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 LetStmt<'v>)

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

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

fn visit_arm(&mut self, a: &'v Arm<'v>)

fn visit_pat(&mut self, p: &'v Pat<'v>)

fn visit_pat_field(&mut self, f: &'v PatField<'v>)

fn visit_expr(&mut self, e: &'v Expr<'v>)

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

fn visit_ty(&mut self, t: &'v Ty<'v, AmbigArg>)

All types are treated as ambiguous types for the purposes of hir visiting in order to ensure that visitors can handle infer vars without it being too error-prone.

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, p: &'v WherePredicate<'v>)

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

fn visit_use(&mut self, p: &'v UsePath<'v>, _hir_id: HirId)

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

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

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

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

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

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

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

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

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

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

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

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

fn visit_generic_args(&mut self, ga: &'v GenericArgs<'v>)

fn visit_assoc_item_constraint( &mut self, constraint: &'v AssocItemConstraint<'v>, )

fn visit_attribute(&mut self, attr: &'v Attribute)

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

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

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 maybe_tcx.

type Result = ()

The result type of the visit_* methods. Can be either (), or ControlFlow<T>.

fn maybe_tcx(&mut self) -> Self::MaybeTyCtxt

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_id(&mut self, _hir_id: HirId) -> Self::Result

fn visit_name(&mut self, _name: Symbol) -> Self::Result

fn visit_ident(&mut self, ident: Ident) -> Self::Result

fn visit_pat_expr(&mut self, expr: &'v PatExpr<'v>) -> Self::Result

fn visit_lit( &mut self, _hir_id: HirId, _lit: &'v Spanned<LitKind>, _negated: bool, ) -> Self::Result

fn visit_anon_const(&mut self, c: &'v AnonConst) -> Self::Result

fn visit_inline_const(&mut self, c: &'v ConstBlock) -> Self::Result

fn visit_const_arg(&mut self, c: &'v ConstArg<'v, AmbigArg>) -> Self::Result

All consts are treated as ambiguous consts for the purposes of hir visiting in order to ensure that visitors can handle infer vars without it being too error-prone.

fn visit_infer( &mut self, inf_id: HirId, inf_span: Span, kind: InferKind<'v>, ) -> Self::Result

fn visit_pattern_type_pattern(&mut self, p: &'v TyPat<'v>) -> Self::Result

fn visit_const_param_default( &mut self, _param: HirId, ct: &'v ConstArg<'v>, ) -> Self::Result

fn visit_fn_ret_ty(&mut self, ret_ty: &'v FnRetTy<'v>) -> Self::Result

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

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

fn visit_precise_capturing_arg( &mut self, arg: &'v PreciseCapturingArgKind<&'v Lifetime, PreciseCapturingNonLifetimeArg>, ) -> Self::Result

fn visit_poly_trait_ref(&mut self, t: &'v PolyTraitRef<'v>) -> Self::Result

fn visit_opaque_ty(&mut self, opaque: &'v OpaqueTy<'v>) -> Self::Result

fn visit_variant_data(&mut self, s: &'v VariantData<'v>) -> Self::Result

fn visit_enum_def(&mut self, enum_definition: &'v EnumDef<'v>) -> Self::Result

fn visit_label(&mut self, label: &'v Label) -> Self::Result

fn visit_qpath( &mut self, qpath: &'v QPath<'v>, id: HirId, _span: Span, ) -> Self::Result

fn visit_associated_item_kind( &mut self, kind: &'v AssocItemKind, ) -> Self::Result

fn visit_defaultness(&mut self, defaultness: &'v Defaultness) -> Self::Result

impl<'v> Visitor<'v> for StatCollector<'v>

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

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

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

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

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

fn visit_param(&mut self, p: &'v Param)

fn visit_arm(&mut self, a: &'v Arm)

fn visit_pat(&mut self, p: &'v Pat)

fn visit_expr(&mut self, e: &'v Expr)

fn visit_ty(&mut self, t: &'v Ty)

fn visit_generic_param(&mut self, g: &'v GenericParam)

fn visit_where_predicate(&mut self, p: &'v WherePredicate)

fn visit_fn(&mut self, fk: FnKind<'v>, _: Span, _: NodeId)

fn visit_assoc_item(&mut self, i: &'v AssocItem, ctxt: AssocCtxt)

fn visit_param_bound(&mut self, b: &'v GenericBound, _ctxt: BoundKind)

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

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

fn visit_path_segment(&mut self, path_segment: &'v PathSegment)

fn visit_generic_args(&mut self, g: &'v GenericArgs)

fn visit_attribute(&mut self, attr: &'v Attribute)

fn visit_expr_field(&mut self, f: &'v ExprField)

fn visit_crate(&mut self, krate: &'v Crate)

fn visit_inline_asm(&mut self, asm: &'v InlineAsm)

type Result = ()

The result type of the visit_* methods. Can be either (), or ControlFlow<T>.

fn visit_ident(&mut self, _: &'a Ident) -> Self::Result

fn visit_foreign_mod(&mut self, nm: &'a ForeignMod) -> Self::Result

fn visit_anon_const(&mut self, c: &'a AnonConst) -> Self::Result

fn visit_method_receiver_expr(&mut self, ex: &'a Expr) -> Self::Result

This method is a hack to workaround unstable of stmt_expr_attributes. It can be removed once that feature is stabilized.

fn visit_ty_pat(&mut self, t: &'a TyPat) -> Self::Result

fn visit_generics(&mut self, g: &'a Generics) -> Self::Result

fn visit_closure_binder(&mut self, b: &'a ClosureBinder) -> Self::Result

fn visit_contract(&mut self, c: &'a FnContract) -> Self::Result

fn visit_where_predicate_kind( &mut self, k: &'a WherePredicateKind, ) -> Self::Result

fn visit_trait_ref(&mut self, t: &'a TraitRef) -> Self::Result

fn visit_precise_capturing_arg( &mut self, arg: &'a PreciseCapturingArg, ) -> Self::Result

fn visit_poly_trait_ref(&mut self, t: &'a PolyTraitRef) -> Self::Result

fn visit_variant_data(&mut self, s: &'a VariantData) -> Self::Result

fn visit_label(&mut self, label: &'a Label) -> Self::Result

fn visit_lifetime( &mut self, lifetime: &'a Lifetime, _: LifetimeCtxt, ) -> Self::Result

fn visit_mac_call(&mut self, mac: &'a MacCall) -> Self::Result

fn visit_id(&mut self, _id: NodeId) -> Self::Result

fn visit_macro_def(&mut self, macro_def: &'a MacroDef) -> Self::Result

fn visit_path(&mut self, path: &'a Path) -> Self::Result

fn visit_use_tree(&mut self, use_tree: &'a UseTree) -> Self::Result

fn visit_generic_arg(&mut self, generic_arg: &'a GenericArg) -> Self::Result

fn visit_assoc_item_constraint( &mut self, constraint: &'a AssocItemConstraint, ) -> Self::Result

fn visit_vis(&mut self, vis: &'a Visibility) -> Self::Result

fn visit_fn_ret_ty(&mut self, ret_ty: &'a FnRetTy) -> Self::Result

fn visit_fn_header(&mut self, header: &'a FnHeader) -> Self::Result

fn visit_pat_field(&mut self, fp: &'a PatField) -> Self::Result

fn visit_format_args(&mut self, fmt: &'a FormatArgs) -> Self::Result

fn visit_inline_asm_sym(&mut self, sym: &'a InlineAsmSym) -> Self::Result

fn visit_capture_by(&mut self, capture_by: &'a CaptureBy) -> Self::Result

fn visit_coroutine_kind( &mut self, coroutine_kind: &'a CoroutineKind, ) -> Self::Result

fn visit_fn_decl(&mut self, fn_decl: &'a FnDecl) -> Self::Result

fn visit_qself(&mut self, qs: &'a Option<Box<QSelf>>) -> Self::Result

fn visit_nested_use_tree( &mut self, use_tree: &'a UseTree, id: NodeId, ) -> Self::Result

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: 72 bytes