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§
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
.
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(..))
.
LangItem(LangItem, Span, Option<HirId>)
Reference to a #[lang = "foo"]
item. HirId
of the inner expr.
Implementations§
source§impl<'hir> QPath<'hir>
impl<'hir> QPath<'hir>
sourcepub fn qself_span(&self) -> Span
pub fn qself_span(&self) -> Span
Returns the span of the qself of this QPath
. For example, ()
in
<() as Trait>::method
.
sourcepub fn last_segment_span(&self) -> Span
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§
source§impl<'hir, __CTX> HashStable<__CTX> for QPath<'hir>where
__CTX: HashStableContext,
impl<'hir, __CTX> HashStable<__CTX> for QPath<'hir>where __CTX: HashStableContext,
fn hash_stable(&self, __hcx: &mut __CTX, __hasher: &mut StableHasher)
impl<'hir> Copy for QPath<'hir>
Auto Trait Implementations§
impl<'hir> RefUnwindSafe for QPath<'hir>
impl<'hir> !Send for QPath<'hir>
impl<'hir> !Sync for QPath<'hir>
impl<'hir> Unpin for QPath<'hir>
impl<'hir> UnwindSafe for QPath<'hir>
Blanket Implementations§
source§impl<'tcx, T> ArenaAllocatable<'tcx, IsCopy> for Twhere
T: Copy,
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]
source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere T: ?Sized,
source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
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 bytesTypeRelative
: 23 bytesLangItem
: 19 bytes