Enum rustc_hir::QPath

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pub enum QPath<'hir> {
    Resolved(Option<&'hir Ty<'hir>>, &'hir Path<'hir>),
    TypeRelative(&'hir Ty<'hir>, &'hir PathSegment<'hir>),
    LangItem(LangItem, Span, Option<HirId>),
}
Expand description

Represents an optionally Self-qualified value/type path or associated extension.

To resolve the path to a DefId, call qpath_res.

Variants§

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Resolved(Option<&'hir Ty<'hir>>, &'hir Path<'hir>)

Path to a definition, optionally “fully-qualified” with a Self type, if the path points to an associated item in a trait.

E.g., an unqualified path like Clone::clone has None for Self, while <Vec<T> as Clone>::clone has Some(Vec<T>) for Self, even though they both have the same two-segment Clone::clone Path.

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TypeRelative(&'hir Ty<'hir>, &'hir PathSegment<'hir>)

Type-related paths (e.g., <T>::default or <T>::Output). Will be resolved by type-checking to an associated item.

UFCS source paths can desugar into this, with Vec::new turning into <Vec>::new, and T::X::Y::method into <<<T>::X>::Y>::method, the X and Y nodes each being a TyKind::Path(QPath::TypeRelative(..)).

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LangItem(LangItem, Span, Option<HirId>)

Reference to a #[lang = "foo"] item. HirId of the inner expr.

Implementations§

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impl<'hir> QPath<'hir>

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pub fn span(&self) -> Span

Returns the span of this QPath.

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pub fn qself_span(&self) -> Span

Returns the span of the qself of this QPath. For example, () in <() as Trait>::method.

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pub fn last_segment_span(&self) -> Span

Returns the span of the last segment of this QPath. For example, method in <() as Trait>::method.

Trait Implementations§

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impl<'hir> Clone for QPath<'hir>

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

Auto Trait Implementations§

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impl<'hir> RefUnwindSafe for QPath<'hir>

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

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

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impl<'hir> Unpin for QPath<'hir>

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impl<'hir> UnwindSafe for QPath<'hir>

Blanket Implementations§

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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: 24 bytes

Size for each variant:

  • Resolved: 23 bytes
  • TypeRelative: 23 bytes
  • LangItem: 19 bytes