Struct rustc_passes::hir_stats::StatCollector

struct StatCollector<'k> {
    krate: Option<Map<'k>>,
    nodes: FxHashMap<&'static str, Node>,
    seen: FxHashSet<Id>,
}

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

krate: Option<Map<'k>>

nodes: FxHashMap<&'static str, Node>

seen: FxHashSet<Id>

Implementations

impl<'k> StatCollector<'k>

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

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

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

fn print(&self, 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 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, 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: &'v 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 Local<'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_let_expr(&mut self, lex: &'v Let<'v>)

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

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

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

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

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

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

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_id(&mut self, _hir_id: HirId)

fn visit_name(&mut self, _name: Symbol)

fn visit_ident(&mut self, ident: Ident)

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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)

fn visit_ident(&mut self, _ident: Ident)

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

fn visit_method_receiver_expr(&mut self, ex: &'ast Expr)

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

fn visit_expr_post(&mut self, _ex: &'ast Expr)

fn visit_generics(&mut self, g: &'ast Generics)

fn visit_closure_binder(&mut self, b: &'ast ClosureBinder)

fn visit_trait_ref(&mut self, t: &'ast TraitRef)

fn visit_poly_trait_ref(&mut self, t: &'ast PolyTraitRef)

fn visit_variant_data(&mut self, s: &'ast VariantData)

fn visit_enum_def(&mut self, enum_definition: &'ast EnumDef)

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

fn visit_lifetime(&mut self, lifetime: &'ast Lifetime, _: LifetimeCtxt)

fn visit_mac_call(&mut self, mac: &'ast MacCall)

fn visit_mac_def(&mut self, _mac: &'ast MacroDef, _id: NodeId)

fn visit_path(&mut self, path: &'ast Path, _id: NodeId)

fn visit_use_tree(&mut self, use_tree: &'ast UseTree, id: NodeId, _nested: bool)

fn visit_generic_arg(&mut self, generic_arg: &'ast GenericArg)

fn visit_assoc_constraint(&mut self, constraint: &'ast AssocConstraint)

fn visit_vis(&mut self, vis: &'ast Visibility)

fn visit_fn_ret_ty(&mut self, ret_ty: &'ast FnRetTy)

fn visit_fn_header(&mut self, _header: &'ast FnHeader)

fn visit_pat_field(&mut self, fp: &'ast PatField)

fn visit_inline_asm_sym(&mut self, sym: &'ast InlineAsmSym)

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