Struct rustc_hir::OpaqueTy

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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 substituted 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.

Trait Implementations§

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

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

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<'hir> Debug for OpaqueTy<'hir>

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

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

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

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

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

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

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

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

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

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<'tcx, T> ArenaAllocatable<'tcx, IsCopy> for Twhere T: Copy,

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

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

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impl<T> Borrow<T> for Twhere 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 Twhere 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> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for Twhere 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> ToOwned for Twhere 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 Twhere 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 Twhere 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.

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: 56 bytes