MacroDef in rustc_ast::ast - Rust
Description: Represents a macro definition.

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## MacroDef

# Struct MacroDef

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    pub struct MacroDef {
        pub body: Box<DelimArgs>,
        pub macro_rules: bool,
        pub eii_declaration: Option<EiiDecl>,
    }

Expand description

Represents a macro definition.

## Fields§

§`body: Box<DelimArgs>`§`macro_rules: bool`

`true` if macro was defined with `macro_rules`.

§`eii_declaration: Option<EiiDecl>`

Corresponds to `#[eii_declaration(...)]`. `#[eii_declaration(...)]` is a built-in attribute macro, not a built-in attribute, because we require some name resolution to occur in the parameters of this attribute. Name resolution isn’t possible in attributes otherwise, so we encode it in the AST. During ast lowering, we turn it back into an attribute again

## Trait Implementations§

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### impl Clone for MacroDef

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

Returns a duplicate 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 MacroDef

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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 MacroDef

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

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

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

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### impl<V: MutVisitor> MutVisitable<V> for MacroDef

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#### type Extra = ()

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#### fn visit_mut(&mut self, visitor: &mut V, extra: Self::Extra) -> V::Result

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### impl<__V> MutWalkable<__V> for MacroDef
where __V: MutVisitor,

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#### fn walk_mut(&mut self, __visitor: &mut __V)

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### impl StableHash for MacroDef

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#### fn stable_hash<__Hcx: StableHashCtxt>( &self, __hcx: &mut __Hcx, __hasher: &mut StableHasher, )

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for MacroDef

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#### type Extra = ()

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#### fn visit(&'a self, visitor: &mut V, extra: Self::Extra) -> V::Result

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### impl<'__ast, __V> Walkable<'__ast, __V> for MacroDef
where __V: Visitor<'__ast>,

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#### fn walk_ref(&'__ast self, __visitor: &mut __V) -> __V::Result

## Auto Trait Implementations§

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### impl DynSend for MacroDef

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### impl DynSync for MacroDef

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### impl Freeze for MacroDef

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### impl RefUnwindSafe for MacroDef

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### impl Send for MacroDef

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### impl Sync for MacroDef

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### impl Unpin for MacroDef

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### impl UnsafeUnpin for MacroDef

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### impl UnwindSafe for MacroDef

## 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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#### unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (`clone_to_uninit`)
Performs copy-assignment from `self` to `dest`. 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> MutVisitorResult for T

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#### type Result = ()

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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

## 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