Struct rustc_hir::OpaqueTy

source ·

pub struct OpaqueTy<'hir> {
    pub generics: &'hir Generics<'hir>,
    pub bounds: GenericBounds<'hir>,
    pub origin: OpaqueTyOrigin,
    pub lifetime_mapping: &'hir [(&'hir Lifetime, LocalDefId)],
    pub in_trait: bool,
}

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§generics: &'hir Generics<'hir>§bounds: GenericBounds<'hir>§origin: OpaqueTyOrigin§lifetime_mapping: &'hir [(&'hir Lifetime, LocalDefId)]

Return-position impl traits (and async futures) must “reify” any late-bound lifetimes that are captured from the function signature they originate from.

This is done by generating a new early-bound lifetime parameter local to the opaque which is instantiated in the function signature with the late-bound lifetime.

This mapping associated a captured lifetime (first parameter) with the new early-bound lifetime that was generated for the opaque.

§in_trait: bool

Whether the opaque is a return-position impl trait (or async future) originating from a trait method. This makes it so that the opaque is lowered as an associated type.

Struct rustc_hir::OpaqueTy

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Trait Implementations§

impl<'hir> Clone for OpaqueTy<'hir>

fn clone(&self) -> OpaqueTy<'hir>

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

impl<'hir> Debug for OpaqueTy<'hir>

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

impl<'hir, __CTX> HashStable<__CTX> for OpaqueTy<'hir>where __CTX: HashStableContext,

fn hash_stable(&self, __hcx: &mut __CTX, __hasher: &mut StableHasher)

impl<'hir> Copy for OpaqueTy<'hir>

Auto Trait Implementations§

impl<'hir> DynSend for OpaqueTy<'hir>

impl<'hir> DynSync for OpaqueTy<'hir>

impl<'hir> Freeze for OpaqueTy<'hir>

impl<'hir> RefUnwindSafe for OpaqueTy<'hir>

impl<'hir> Send for OpaqueTy<'hir>

impl<'hir> Sync for OpaqueTy<'hir>

impl<'hir> Unpin for OpaqueTy<'hir>

impl<'hir> UnwindSafe for OpaqueTy<'hir>

Blanket Implementations§

impl<T> Aligned for T

const ALIGN: Alignment = _

impl<T> Any for Twhere T: 'static + ?Sized,

fn type_id(&self) -> TypeId

impl<'tcx, T> ArenaAllocatable<'tcx, IsCopy> for Twhere T: Copy,

fn allocate_on<'a>(self, arena: &'a Arena<'tcx>) -> &'a mut T

fn allocate_from_iter<'a>( arena: &'a Arena<'tcx>, iter: impl IntoIterator<Item = T> ) -> &'a mut [T]

impl<T> Borrow<T> for Twhere T: ?Sized,

fn borrow(&self) -> &T

impl<T> BorrowMut<T> for Twhere T: ?Sized,

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

impl<T> From<T> for T

fn from(t: T) -> T

impl<T> Instrument for T

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

fn in_current_span(self) -> Instrumented<Self>

impl<T, U> Into<U> for Twhere U: From<T>,

fn into(self) -> U

impl<T> Pointable for T

const ALIGN: usize = _

type Init = T

unsafe fn init(init: <T as Pointable>::Init) -> usize

unsafe fn deref<'a>(ptr: usize) -> &'a T

unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

unsafe fn drop(ptr: usize)

impl<T> Same for T

type Output = T

impl<T> ToOwned for Twhere T: Clone,

type Owned = T

fn to_owned(&self) -> T

fn clone_into(&self, target: &mut T)

impl<T, U> TryFrom<U> for Twhere U: Into<T>,

type Error = Infallible

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

impl<T, U> TryInto<U> for Twhere U: TryFrom<T>,

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

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

impl<V, T> VZip<V> for Twhere V: MultiLane<T>,

fn vzip(self) -> V

impl<T> WithSubscriber for T

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

fn with_current_subscriber(self) -> WithDispatch<Self>

impl<'a, T> Captures<'a> for Twhere T: ?Sized,

Layout§

impl<'hir, CTX> HashStable<CTX> for OpaqueTy<'hir>
where __CTX: HashStableContext,

fn hash_stable(&self, hcx: &mut CTX, __hasher: &mut StableHasher)

impl<T> Any for T
where T: 'static + ?Sized,

impl<'tcx, T> ArenaAllocatable<'tcx, IsCopy> for T
where T: Copy,

impl<T> Borrow<T> for T
where T: ?Sized,

impl<T> BorrowMut<T> for T
where T: ?Sized,

impl<T, U> Into<U> for T
where U: From<T>,

impl<T> ToOwned for T
where T: Clone,

impl<T, U> TryFrom<U> for T
where U: Into<T>,

impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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

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

impl<'a, T> Captures<'a> for T
where T: ?Sized,