Enum rustc_hir::hir::QPath

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

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)

Reference to a #[lang = "foo"] item.

Implementations

impl<'hir> QPath<'hir>

pub fn span(&self) -> Span

Returns the span of this QPath.

pub fn qself_span(&self) -> Span

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

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

impl<'hir> Debug for QPath<'hir>

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

Formats the value using the given formatter.

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

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