Type Alias rustc_middle::ty::PolyExistentialTraitRef

pub type PolyExistentialTraitRef<'tcx> = Binder<'tcx, ExistentialTraitRef<'tcx>>;

Aliased Type

struct PolyExistentialTraitRef<'tcx> {
    value: ExistentialTraitRef<'tcx>,
    bound_vars: &'tcx List<BoundVariableKind>,
}

Fields

value: ExistentialTraitRef<'tcx>

bound_vars: &'tcx List<BoundVariableKind>

Implementations

impl<'tcx> PolyExistentialTraitRef<'tcx>

pub fn def_id(&self) -> DefId

pub fn with_self_ty( &self, tcx: TyCtxt<'tcx>, self_ty: Ty<'tcx> ) -> PolyTraitRef<'tcx>

Object types don’t have a self type specified. Therefore, when we convert the principal trait-ref into a normal trait-ref, you must give some self type. A common choice is mk_err() or some placeholder type.

Trait Implementations

impl<'tcx> Display for PolyExistentialTraitRef<'tcx>

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

Formats the value using the given formatter.

impl<'tcx> Key for PolyExistentialTraitRef<'tcx>

type CacheSelector = DefaultCacheSelector<Binder<'tcx, ExistentialTraitRef<'tcx>>>

fn default_span(&self, tcx: TyCtxt<'_>) -> Span

In the event that a cycle occurs, if no explicit span has been given for a query with key self, what span should we use?

fn key_as_def_id(&self) -> Option<DefId>

If the key is a DefId or DefId–equivalent, return that DefId. Otherwise, return None.

fn ty_def_id(&self) -> Option<DefId>

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