Type Alias ExistentialPredicate

pub type ExistentialPredicate<'tcx> = ExistentialPredicate<TyCtxt<'tcx>>;

Aliased Type

enum ExistentialPredicate<'tcx> {
    Trait(ExistentialTraitRef<TyCtxt<'tcx>>),
    Projection(ExistentialProjection<TyCtxt<'tcx>>),
    AutoTrait(DefId),
}

Variants

Trait(ExistentialTraitRef<TyCtxt<'tcx>>)

E.g., Iterator.

Projection(ExistentialProjection<TyCtxt<'tcx>>)

E.g., Iterator::Item = T.

AutoTrait(DefId)

E.g., Send.

Trait Implementations

impl<'tcx> ExistentialPredicateStableCmpExt<'tcx> for ExistentialPredicate<'tcx>

fn stable_cmp(&self, tcx: TyCtxt<'tcx>, other: &Self) -> Ordering

Compares via an ordering that will not change if modules are reordered or other changes are made to the tree. In particular, this ordering is preserved across incremental compilations.

impl<'tcx, P: PrettyPrinter<'tcx>> Print<'tcx, P> for ExistentialPredicate<'tcx>

fn print(&self, cx: &mut P) -> Result<(), PrintError>

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:

• Trait: 24 bytes
• Projection: 24 bytes
• AutoTrait: 12 bytes