# Enum rustc_ast::ast::AssocItemKind

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    pub enum AssocItemKind {
        Const(Box<ConstItem>),
        Fn(Box<Fn>),
        Type(Box<TyAlias>),
        MacCall(P<MacCall>),
        Delegation(Box<Delegation>),
        DelegationMac(Box<DelegationMac>),
    }

Expand description

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 `Option`s below denote the bodies, where `Some(_)` means “provided” and conversely `None` means “required”.

## Variants§

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### Const(Box<ConstItem>)

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

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### Fn(Box<Fn>)

An associated function.

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### Type(Box<TyAlias>)

An associated type.

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### MacCall(P<MacCall>)

A macro expanding to associated items.

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### Delegation(Box<Delegation>)

An associated delegation item.

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### DelegationMac(Box<DelegationMac>)

An associated list or glob delegation item.

## Implementations§

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### impl AssocItemKind

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#### pub fn defaultness(&self) -> Defaultness

## Trait Implementations§

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### impl Clone for AssocItemKind

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#### fn clone(&self) -> AssocItemKind

Returns a copy of the value. Read more
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#### fn clone_from(&mut self, source: &Self)

Performs copy-assignment from `source`. Read more
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### impl Debug for AssocItemKind

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

Formats the value using the given formatter. Read more
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### impl<__D: SpanDecoder> Decodable<__D> for AssocItemKind

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#### fn decode(__decoder: &mut __D) -> Self

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### impl<__E: SpanEncoder> Encodable<__E> for AssocItemKind

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#### fn encode(&self, __encoder: &mut __E)

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### impl From<AssocItemKind> for ItemKind

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#### fn from(assoc_item_kind: AssocItemKind) -> ItemKind

Converts to this type from the input type.
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### impl NoopVisitItemKind for AssocItemKind

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#### fn noop_visit(&mut self, visitor: &mut impl MutVisitor)

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### impl TryFrom<ItemKind> for AssocItemKind

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#### type Error = ItemKind

The type returned in the event of a conversion error.
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#### fn try_from(item_kind: ItemKind) -> Result<AssocItemKind, ItemKind>

Performs the conversion.
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### impl WalkItemKind for AssocItemKind

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#### fn walk<'a, V: Visitor<'a>>( &'a self, item: &'a Item<Self>, ctxt: AssocCtxt, visitor: &mut V, ) -> V::Result

## Auto Trait Implementations§

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### impl DynSend for AssocItemKind

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### impl DynSync for AssocItemKind

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### impl Freeze for AssocItemKind

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### impl !RefUnwindSafe for AssocItemKind

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### impl !Send for AssocItemKind

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### impl !Sync for AssocItemKind

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### impl Unpin for AssocItemKind

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### impl !UnwindSafe for AssocItemKind

## Blanket Implementations§

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### impl<T> Aligned for T

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#### const ALIGN: Alignment = _

Alignment of `Self`.
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### impl<T> Any for T
where T: 'static + ?Sized,

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#### fn type_id(&self) -> TypeId

Gets the `TypeId` of `self`. Read more
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### impl<T> Borrow<T> for T
where T: ?Sized,

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#### fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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### impl<T> BorrowMut<T> for T
where T: ?Sized,

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#### fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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### impl<T> CloneToUninit for T
where T: Clone,

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#### default unsafe fn clone_to_uninit(&self, dst: *mut T)

🔬This is a nightly-only experimental API. (`clone_to_uninit`)
Performs copy-assignment from `self` to `dst`. Read more
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### impl<T> From<T> for T

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#### fn from(t: T) -> T

Returns the argument unchanged.

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### impl<T> Instrument for T

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#### fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided `Span`, returning an `Instrumented` wrapper. Read more
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#### fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current `Span`, returning an `Instrumented` wrapper. Read more
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### impl<T, U> Into<U> for T
where U: From<T>,

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#### fn into(self) -> U

Calls `U::from(self)`.

That is, this conversion is whatever the implementation of `From<T> for U` chooses to do.

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### impl<T> IntoEither for T

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#### fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts `self` into a `Left` variant of `Either<Self, Self>` if `into_left` is `true`. Converts `self` into a `Right` variant of `Either<Self, Self>` otherwise. Read more
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#### fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

Converts `self` into a `Left` variant of `Either<Self, Self>` if `into_left(&self)` returns `true`. Converts `self` into a `Right` variant of `Either<Self, Self>` otherwise. Read more
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### impl<T> Pointable for T

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#### const ALIGN: usize = _

The alignment of pointer.
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#### type Init = T

The type for initializers.
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#### unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more
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#### unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more
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#### unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more
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#### unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more
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### impl<T> Same for T

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#### type Output = T

Should always be `Self`
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### impl<T> ToOwned for T
where T: Clone,

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#### type Owned = T

The resulting type after obtaining ownership.
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#### fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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#### fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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### impl<T, U> TryFrom<U> for T
where U: Into<T>,

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#### type Error = Infallible

The type returned in the event of a conversion error.
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#### fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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### impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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#### type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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#### fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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### impl<T> WithSubscriber for T

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#### fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
where S: Into<Dispatch>,

Attaches the provided `Subscriber` to this type, returning a `WithDispatch` wrapper. Read more
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#### fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default `Subscriber` to this type, returning a `WithDispatch` wrapper. Read more
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### impl<'a, T> Captures<'a> for T
where T: ?Sized,

## 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: 16 bytes

Size for each variant:

- `Const`: 8 bytes
- `Fn`: 8 bytes
- `Type`: 8 bytes
- `MacCall`: 8 bytes
- `Delegation`: 8 bytes
- `DelegationMac`: 8 bytes