Struct rustc_middle::ty::sty::TraitRef

pub struct TraitRef<'tcx> {
    pub def_id: DefId,
    pub substs: SubstsRef<'tcx>,
}

A complete reference to a trait. These take numerous guises in syntax, but perhaps the most recognizable form is in a where-clause:

T: Foo<U>

This would be represented by a trait-reference where the DefId is the DefId for the trait Foo and the substs define T as parameter 0, and U as parameter 1.

Trait references also appear in object types like Foo<U>, but in that case the Self parameter is absent from the substitutions.

Fields

def_id: DefId

substs: SubstsRef<'tcx>

Implementations

impl<'tcx> TraitRef<'tcx>

pub fn print_only_trait_path(self) -> TraitRefPrintOnlyTraitPath<'tcx>

impl<'tcx> TraitRef<'tcx>

pub fn new(def_id: DefId, substs: SubstsRef<'tcx>) -> TraitRef<'tcx>

pub fn identity(tcx: TyCtxt<'tcx>, def_id: DefId) -> TraitRef<'tcx>

Returns a TraitRef of the form P0: Foo<P1..Pn> where Pi are the parameters defined on trait.

pub fn self_ty(&self) -> Ty<'tcx>

pub fn from_method(
    tcx: TyCtxt<'tcx>,
    trait_id: DefId,
    substs: SubstsRef<'tcx>
) -> TraitRef<'tcx>

Trait Implementations

impl<'tcx> Clone for TraitRef<'tcx>

pub fn clone(&self) -> TraitRef<'tcx>

Returns a copy of the value.

pub fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<'tcx> Copy for TraitRef<'tcx>

impl<'tcx> Debug for TraitRef<'tcx>

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

Formats the value using the given formatter.

impl<'tcx, __D: TyDecoder<'tcx>> Decodable<__D> for TraitRef<'tcx>

pub fn decode(__decoder: &mut __D) -> Result<Self, <__D as Decoder>::Error>

impl<'tcx> Display for TraitRef<'tcx>

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

Formats the value using the given formatter.

impl<'tcx, __E: TyEncoder<'tcx>> Encodable<__E> for TraitRef<'tcx>

pub fn encode(&self, __encoder: &mut __E) -> Result<(), <__E as Encoder>::Error>

impl<'tcx> Eq for TraitRef<'tcx>

impl<'tcx> Hash for TraitRef<'tcx>

pub fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

pub fn hash_slice<H>(data: &[Self], state: &mut H) where
    H: Hasher, 

Feeds a slice of this type into the given Hasher.

impl<'tcx, '__ctx> HashStable<StableHashingContext<'__ctx>> for TraitRef<'tcx>

pub fn hash_stable(
    &self,
    __hcx: &mut StableHashingContext<'__ctx>,
    __hasher: &mut StableHasher
)

impl<'a, 'tcx> Lift<'tcx> for TraitRef<'a>

type Lifted = TraitRef<'tcx>

pub fn lift_to_tcx(self, tcx: TyCtxt<'tcx>) -> Option<Self::Lifted>

impl<'tcx> PartialEq<TraitRef<'tcx>> for TraitRef<'tcx>

pub fn eq(&self, other: &TraitRef<'tcx>) -> bool

This method tests for self and other values to be equal, and is used by ==.

pub fn ne(&self, other: &TraitRef<'tcx>) -> bool

This method tests for !=.

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

type Output = P

type Error = Error

pub fn print(&self, cx: P) -> Result<Self::Output, Self::Error>

impl<'tcx> Relate<'tcx> for TraitRef<'tcx>

pub fn relate<R: TypeRelation<'tcx>>(
    relation: &mut R,
    a: TraitRef<'tcx>,
    b: TraitRef<'tcx>
) -> RelateResult<'tcx, TraitRef<'tcx>>

impl<'tcx> StructuralEq for TraitRef<'tcx>

impl<'tcx> StructuralPartialEq for TraitRef<'tcx>

impl<'tcx> ToPolyTraitRef<'tcx> for TraitRef<'tcx>

pub fn to_poly_trait_ref(&self) -> PolyTraitRef<'tcx>

impl<'tcx> TypeFoldable<'tcx> for TraitRef<'tcx>

pub fn super_fold_with<__F: TypeFolder<'tcx>>(self, __folder: &mut __F) -> Self

pub fn super_visit_with<__F: TypeVisitor<'tcx>>(
    &self,
    __folder: &mut __F
) -> ControlFlow<__F::BreakTy>

pub fn fold_with<F: TypeFolder<'tcx>>(self, folder: &mut F) -> Self

pub fn visit_with<V: TypeVisitor<'tcx>>(
    &self,
    visitor: &mut V
) -> ControlFlow<V::BreakTy>

pub fn has_vars_bound_at_or_above(&self, binder: DebruijnIndex) -> bool

Returns true if self has any late-bound regions that are either bound by binder or bound by some binder outside of binder. If binder is ty::INNERMOST, this indicates whether there are any late-bound regions that appear free.

pub fn has_vars_bound_above(&self, binder: DebruijnIndex) -> bool

Returns true if this self has any regions that escape binder (and hence are not bound by it).

pub fn has_escaping_bound_vars(&self) -> bool

pub fn has_type_flags(&self, flags: TypeFlags) -> bool

pub fn has_projections(&self) -> bool

pub fn has_opaque_types(&self) -> bool

pub fn references_error(&self) -> bool

pub fn has_param_types_or_consts(&self) -> bool

pub fn has_infer_regions(&self) -> bool

pub fn has_infer_types(&self) -> bool

pub fn has_infer_types_or_consts(&self) -> bool

pub fn needs_infer(&self) -> bool

pub fn has_placeholders(&self) -> bool

pub fn needs_subst(&self) -> bool

pub fn has_free_regions(&self) -> bool

"Free" regions in this context means that it has any region that is not (a) erased or (b) late-bound.

pub fn has_erased_regions(&self) -> bool

pub fn has_erasable_regions(&self) -> bool

True if there are any un-erased free regions.

pub fn is_global(&self) -> bool

Indicates whether this value references only 'global' generic parameters that are the same regardless of what fn we are in. This is used for caching.

pub fn has_late_bound_regions(&self) -> bool

True if there are any late-bound regions

pub fn still_further_specializable(&self) -> bool

Indicates whether this value still has parameters/placeholders/inference variables which could be replaced later, in a way that would change the results of impl specialization.