Enum rustc_ast::ast::AssocItemKind

pub enum AssocItemKind {
    Const(Defaultness, P<Ty>, Option<P<Expr>>),
    Fn(Box<Fn>),
    TyAlias(Box<TyAlias>),
    MacCall(MacCall),
}

Represents associated item kinds.

The term “provided” in the variants below refers to the item having a default definition / body. Meanwhile, a “required” item lacks a definition / body. In an implementation, all items must be provided. The Options below denote the bodies, where Some(_) means “provided” and conversely None means “required”.

Variants

Const(Defaultness, P<Ty>, Option<P<Expr>>)

Tuple Fields

0: Defaultness

1: P<Ty>

2: Option<P<Expr>>

An associated constant, const $ident: $ty $def?; where def ::= "=" $expr? ;. If def is parsed, then the constant is provided, and otherwise required.

Fn(Box<Fn>)

Tuple Fields

0: Box<Fn>

An associated function.

TyAlias(Box<TyAlias>)

Tuple Fields

0: Box<TyAlias>

An associated type.

MacCall(MacCall)

Tuple Fields

0: MacCall

A macro expanding to associated items.

Implementations

impl AssocItemKind

pub fn defaultness(&self) -> Defaultness

Trait Implementations

impl Clone for AssocItemKind

fn clone(&self) -> AssocItemKind

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for AssocItemKind

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

Formats the value using the given formatter.

impl<__D: Decoder> Decodable<__D> for AssocItemKind

fn decode(__decoder: &mut __D) -> Result<Self, <__D as Decoder>::Error>

impl<__E: Encoder> Encodable<__E> for AssocItemKind

fn encode(&self, __encoder: &mut __E) -> Result<(), <__E as Encoder>::Error>

impl From<AssocItemKind> for ItemKind

fn from(assoc_item_kind: AssocItemKind) -> ItemKind

Performs the conversion.

impl TryFrom<ItemKind> for AssocItemKind

type Error = ItemKind

The type returned in the event of a conversion error.

fn try_from(item_kind: ItemKind) -> Result<AssocItemKind, ItemKind>

Performs the conversion.

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

Size for each variant:

• Const: 28 bytes
• Fn: 12 bytes
• TyAlias: 12 bytes
• MacCall: 68 bytes