Type Alias rustc_middle::ty::predicate::TraitPredicate

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

Aliased Type

struct TraitPredicate<'tcx> {
    pub trait_ref: TraitRef<TyCtxt<'tcx>>,
    pub polarity: PredicatePolarity,
}

Fields

trait_ref: TraitRef<TyCtxt<'tcx>>

polarity: PredicatePolarity

If polarity is Positive: we are proving that the trait is implemented.

If polarity is Negative: we are proving that a negative impl of this trait exists. (Note that coherence also checks whether negative impls of supertraits exist via a series of predicates.)

If polarity is Reserved: that’s a bug.

Trait Implementations

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

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

impl<'tcx> PrintTraitPredicateExt<'tcx> for TraitPredicate<'tcx>

fn print_modifiers_and_trait_path(self) -> TraitPredPrintModifiersAndPath<'tcx>

impl<'tcx> UpcastFrom<TyCtxt<'tcx>, TraitRef<TyCtxt<'tcx>>> for TraitPredicate<'tcx>

fn upcast_from(from: TraitRef<'tcx>, _tcx: TyCtxt<'tcx>) -> Self

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