ImportKind in rustc_resolve::imports - Rust
Description: Contains data for specific kinds of imports.

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## ImportKind

# Enum ImportKind

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    pub(crate) enum ImportKind<'ra> {
        Single {
            source: Ident,
            target: Ident,
            decls: PerNS<CmCell<PendingDecl<'ra>>>,
            type_ns_only: bool,
            nested: bool,
            id: NodeId,
        },
        Glob {
            max_vis: CmCell<Option<Visibility>>,
            id: NodeId,
        },
        ExternCrate {
            source: Option<Symbol>,
            target: Ident,
            id: NodeId,
        },
        MacroUse {
            warn_private: bool,
        },
        MacroExport,
    }

Expand description

Contains data for specific kinds of imports.

## Variants§

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### Single

#### Fields

§`source: Ident`

`source` in `use prefix::source as target`.

§`target: Ident`

`target` in `use prefix::source as target`. It will directly use `source` when the format is `use prefix::source`.

§`decls: PerNS<CmCell<PendingDecl<'ra>>>`

Name declarations introduced by the import.

§`type_ns_only: bool`

`true` for `...::{self [as target]}` imports, `false` otherwise.

§`nested: bool`

Did this import result from a nested import? i.e. `use foo::{bar, baz};`

§`id: NodeId`

The ID of the `UseTree` that imported this `Import`.

In the case where the `Import` was expanded from a “nested” use tree, this id is the ID of the leaf tree. For example:

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    use foo::bar::{a, b}

If this is the import for `foo::bar::a`, we would have the ID of the `UseTree` for `a` in this field.

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### Glob

#### Fields

§`max_vis: CmCell<Option<Visibility>>`
§`id: NodeId`
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### ExternCrate

#### Fields

§`source: Option<Symbol>`
§`target: Ident`
§`id: NodeId`
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### MacroUse

#### Fields

§`warn_private: bool`

A field has been added indicating whether it should be reported as a lint, addressing issue#119301.

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### MacroExport

## Trait Implementations§

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### impl<'ra> Clone for ImportKind<'ra>

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#### fn clone(&self) -> ImportKind<'ra>

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<'ra> Debug for ImportKind<'ra>

Manually implement `Debug` for `ImportKind` because the `source/target_bindings` contain `Cell`s which can introduce infinite loops while printing.

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

Formats the value using the given formatter. Read more

## Auto Trait Implementations§

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### impl<'ra> !DynSend for ImportKind<'ra>

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### impl<'ra> !DynSync for ImportKind<'ra>

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### impl<'ra> !Freeze for ImportKind<'ra>

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### impl<'ra> !RefUnwindSafe for ImportKind<'ra>

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### impl<'ra> !Send for ImportKind<'ra>

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### impl<'ra> !Sync for ImportKind<'ra>

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### impl<'ra> Unpin for ImportKind<'ra>

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### impl<'ra> UnsafeUnpin for ImportKind<'ra>

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### impl<'ra> !UnwindSafe for ImportKind<'ra>

## 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, R> CollectAndApply<T, R> for T

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#### fn collect_and_apply<I, F>(iter: I, f: F) -> R
where I: Iterator<Item = T>, F: FnOnce(&[T]) -> R,

Equivalent to `f(&iter.collect::<Vec<_>>())`.

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#### type Output = R

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### impl<T> DynClone for T
where T: Clone,

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#### fn __clone_box(&self, _: Private) -> *mut ()

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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<K> IntoQueryKey<K> for K

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#### fn into_query_key(self) -> K

Argument conversion from `Self` to `K`. This should always be a very cheap conversion, e.g. `LocalDefId::to_def_id`.
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### impl<T> MaybeResult<T> for T

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#### type Error = !

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#### fn from(_: Result<T, <T as MaybeResult<T>>::Error>) -> T

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#### fn to_result(self) -> Result<T, <T as MaybeResult<T>>::Error>

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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<I, T, U> Upcast<I, U> for T
where U: UpcastFrom<I, T>,

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#### fn upcast(self, interner: I) -> U

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### impl<I, T> UpcastFrom<I, T> for T

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#### fn upcast_from(from: T, _tcx: I) -> T

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### impl<V, T> VZip<V> for T
where V: MultiLane<T>,

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#### fn vzip(self) -> V

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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<T> ErasedDestructor for T
where T: 'static,

## 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: 80 bytes

Size for each variant:

- `Single`: 79 bytes
- `Glob`: 11 bytes
- `ExternCrate`: 23 bytes
- `MacroUse`: 1 byte
- `MacroExport`: 0 bytes