Struct StatCollector

struct StatCollector<'k> {
    krate: Option<Map<'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

krate: Option<Map<'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, 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 [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: &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>)

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 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.

type Result = ()

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

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) -> Self::Result

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

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

fn visit_array_length(&mut self, len: &'v ArrayLen<'v>) -> 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>) -> Self::Result

fn visit_pattern_type_pattern(&mut self, _p: &'v Pat<'v>)

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 PreciseCapturingArg<'v>, ) -> 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>, item_id: HirId, ) -> Self::Result

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

fn visit_infer(&mut self, inf: &'v InferArg) -> 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, _ident: &'ast Ident) -> Self::Result

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

fn visit_method_receiver_expr(&mut self, ex: &'ast 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_generics(&mut self, g: &'ast Generics) -> Self::Result

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

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

fn visit_precise_capturing_arg(&mut self, arg: &'ast PreciseCapturingArg)

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

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

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

fn visit_variant_discr(&mut self, discr: &'ast AnonConst) -> Self::Result

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

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

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

fn visit_mac_def(&mut self, _mac: &'ast MacroDef, _id: NodeId) -> Self::Result

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

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

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

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

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

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

fn visit_fn_header(&mut self, _header: &'ast FnHeader) -> Self::Result

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

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

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

fn visit_capture_by(&mut self, _capture_by: &'ast CaptureBy) -> 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