Struct AssocItems

pub struct AssocItems {
    items: SortedIndexMultiMap<u32, Option<Symbol>, AssocItem>,
}

A list of ty::AssocItems in definition order that allows for efficient lookup by name.

When doing lookup by name, we try to postpone hygienic comparison for as long as possible since it is relatively expensive. Instead, items are indexed by Symbol and hygienic comparison is done only on items with the same name.

Fields

items: SortedIndexMultiMap<u32, Option<Symbol>, AssocItem>

Implementations

impl AssocItems

pub fn new(items_in_def_order: impl IntoIterator<Item = AssocItem>) -> Self

Constructs an AssociatedItems map from a series of ty::AssocItems in definition order.

pub fn in_definition_order(&self) -> impl '_ + Iterator<Item = &AssocItem>

Returns an iterator over associated items in the order they were defined.

New code should avoid relying on definition order. If you need a particular associated item for a known trait, make that trait a lang item instead of indexing this array.

pub fn len(&self) -> usize

pub fn filter_by_name_unhygienic( &self, name: Symbol, ) -> impl '_ + Iterator<Item = &AssocItem>

Returns an iterator over all associated items with the given name, ignoring hygiene.

Panics if name.is_empty() returns true.

pub fn find_by_ident_and_kind( &self, tcx: TyCtxt<'_>, ident: Ident, assoc_tag: AssocTag, parent_def_id: DefId, ) -> Option<&AssocItem>

Returns the associated item with the given identifier and AssocKind, if one exists. The identifier is matched hygienically.

pub fn find_by_ident_and_namespace( &self, tcx: TyCtxt<'_>, ident: Ident, ns: Namespace, parent_def_id: DefId, ) -> Option<&AssocItem>

Returns the associated item with the given identifier in the given Namespace, if one exists. The identifier is matched hygienically.

Trait Implementations

impl Clone for AssocItems

fn clone(&self) -> AssocItems

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for AssocItems

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<'__ctx> HashStable<StableHashingContext<'__ctx>> for AssocItems

fn hash_stable( &self, __hcx: &mut StableHashingContext<'__ctx>, __hasher: &mut StableHasher, )

impl PartialEq for AssocItems

fn eq(&self, other: &AssocItems) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for AssocItems

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: 48 bytes