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>

pub fn print_only_trait_name(self) -> TraitRefPrintOnlyTraitName<'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
) -> Binder<'tcx, 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>

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

Returns a copy of the value.

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

Performs copy-assignment from source.

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

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

Formats the value using the given formatter.

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

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

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

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

Formats the value using the given formatter.

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

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

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

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

Feeds this value into the given Hasher.

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>

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

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

type Lifted = TraitRef<'tcx>

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

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

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

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

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

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

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

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

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

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

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

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

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

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.

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).

fn has_escaping_bound_vars(&self) -> bool

fn definitely_has_type_flags(&self, tcx: TyCtxt<'tcx>, flags: TypeFlags) -> bool

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

fn has_projections(&self) -> bool

fn has_opaque_types(&self) -> bool

fn references_error(&self) -> bool

fn potentially_has_param_types_or_consts(&self) -> bool

fn definitely_has_param_types_or_consts(&self, tcx: TyCtxt<'tcx>) -> bool

fn has_infer_regions(&self) -> bool

fn has_infer_types(&self) -> bool

fn has_infer_types_or_consts(&self) -> bool

fn needs_infer(&self) -> bool

fn has_placeholders(&self) -> bool

fn potentially_needs_subst(&self) -> bool

fn definitely_needs_subst(&self, tcx: TyCtxt<'tcx>) -> bool

fn has_free_regions(&self, tcx: TyCtxt<'tcx>) -> bool

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

fn has_erased_regions(&self) -> bool

fn has_erasable_regions(&self, tcx: TyCtxt<'tcx>) -> bool

True if there are any un-erased free regions.

fn is_known_global(&self) -> bool

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

fn is_global(&self, tcx: TyCtxt<'tcx>) -> 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.

fn has_late_bound_regions(&self) -> bool

True if there are any late-bound regions

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.

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

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

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

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

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: 16 bytes