Struct rustc_mir::monomorphize::Instance

pub struct Instance<'tcx> {
    pub def: InstanceDef<'tcx>,
    pub substs: &'tcx Slice<Kind<'tcx>>,
}

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Fields

def: InstanceDef<'tcx>

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substs: &'tcx Slice<Kind<'tcx>>

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Methods

impl<'a, 'tcx> Instance<'tcx>

pub fn ty(&self, tcx: TyCtxt<'a, 'tcx, 'tcx>) -> &'tcx TyS<'tcx>

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impl<'a, 'b, 'tcx> Instance<'tcx>

pub fn new(def_id: DefId, substs: &'tcx Slice<Kind<'tcx>>) -> Instance<'tcx>

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pub fn mono(tcx: TyCtxt<'a, 'tcx, 'b>, def_id: DefId) -> Instance<'tcx>

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pub fn def_id(&self) -> DefId

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pub fn resolve(     tcx: TyCtxt<'a, 'tcx, 'tcx>,     param_env: ParamEnv<'tcx>,     def_id: DefId,     substs: &'tcx Slice<Kind<'tcx>> ) -> Option<Instance<'tcx>>

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Resolve a (def_id, substs) pair to an (optional) instance -- most commonly, this is used to find the precise code that will run for a trait method invocation, if known.

Returns None if we cannot resolve Instance to a specific instance. For example, in a context like this,

fn foo<T: Debug>(t: T) { ... }

trying to resolve Debug::fmt applied to T will yield None, because we do not know what code ought to run. (Note that this setting is also affected by the RevealMode in the parameter environment.)

Presuming that coherence and type-check have succeeded, if this method is invoked in a monomorphic context (i.e., like during codegen), then it is guaranteed to return Some.

pub fn resolve_closure(     tcx: TyCtxt<'a, 'tcx, 'tcx>,     def_id: DefId,     substs: ClosureSubsts<'tcx>,     requested_kind: ClosureKind ) -> Instance<'tcx>

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Trait Implementations

impl<'tcx> Clone for Instance<'tcx>

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

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<'tcx> Copy for Instance<'tcx>

impl<'tcx> Encodable for Instance<'tcx>

fn encode<__S>(&self, s: &mut __S) -> Result<(), <__S as Encoder>::Error> where     __S: Encoder,

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impl<'tcx> TypeFoldable<'tcx> for Instance<'tcx>

fn super_fold_with<'gcx, F>(&self, folder: &mut F) -> Instance<'tcx> where     'gcx: 'tcx,     F: TypeFolder<'gcx, 'tcx>,

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fn super_visit_with<V>(&self, visitor: &mut V) -> bool where     V: TypeVisitor<'tcx>,

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

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

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

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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_regions_bound_above(&self, binder: DebruijnIndex) -> bool

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

fn has_escaping_regions(&self) -> bool

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

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fn has_projections(&self) -> bool

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fn references_error(&self) -> bool

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fn has_param_types(&self) -> bool

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fn has_self_ty(&self) -> bool

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fn has_infer_types(&self) -> bool

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fn needs_infer(&self) -> bool

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fn has_skol(&self) -> bool

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fn needs_subst(&self) -> bool

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fn has_re_skol(&self) -> bool

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fn has_closure_types(&self) -> bool

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fn has_free_regions(&self) -> bool

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

fn has_erasable_regions(&self) -> bool

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True if there any any un-erased free regions.

fn is_global(&self) -> bool

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

fn has_late_bound_regions(&self) -> bool

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True if there are any late-bound regions

fn visit_tys_shallow<impl FnMut(Ty<'tcx>) -> bool>(     &self,     visit: impl FnMut(Ty<'tcx>) -> bool ) -> bool where     impl FnMut(Ty<'tcx>) -> bool: FnMut(&'tcx TyS<'tcx>) -> bool,

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A visitor that does not recurse into types, works like fn walk_shallow in Ty.

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

type Lifted = Instance<'tcx>

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fn lift_to_tcx(&self, tcx: TyCtxt<'b, 'gcx, 'tcx>) -> Option<Instance<'tcx>>

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impl<'tcx> Display for Instance<'tcx>

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

Formats the value using the given formatter.

impl<'tcx> Debug for Instance<'tcx>

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

Formats the value using the given formatter.

impl<'tcx> Eq for Instance<'tcx>

fn assert_receiver_is_total_eq(&self)

impl<'a, 'tcx> HashStable<StableHashingContext<'a>> for Instance<'tcx>

fn hash_stable<W>(     &self,     __ctx: &mut StableHashingContext<'a>,     __hasher: &mut StableHasher<W> ) where     W: StableHasherResult,

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impl<'tcx> Hash for Instance<'tcx>

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

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> Decodable for Instance<'tcx>

fn decode<__D>(d: &mut __D) -> Result<Instance<'tcx>, <__D as Decoder>::Error> where     __D: Decoder,

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impl<'tcx> PartialEq<Instance<'tcx>> for Instance<'tcx>

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

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

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

This method tests for !=.