Struct rustc::ty::instance::Instance [−][src]
pub struct Instance<'tcx> { pub def: InstanceDef<'tcx>, pub substs: &'tcx Substs<'tcx>, }
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Fields
def: InstanceDef<'tcx>
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substs: &'tcx Substs<'tcx>
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Methods
impl<'a, 'tcx> Instance<'tcx>
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impl<'a, 'tcx> Instance<'tcx>
pub fn ty(&self, tcx: TyCtxt<'a, 'tcx, 'tcx>) -> Ty<'tcx>
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pub fn ty(&self, tcx: TyCtxt<'a, 'tcx, 'tcx>) -> Ty<'tcx>
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impl<'a, 'b, 'tcx> Instance<'tcx>
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impl<'a, 'b, 'tcx> Instance<'tcx>
pub fn new(def_id: DefId, substs: &'tcx Substs<'tcx>) -> Instance<'tcx>
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pub fn new(def_id: DefId, substs: &'tcx Substs<'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 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 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 Substs<'tcx>
) -> Option<Instance<'tcx>>
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pub fn resolve(
tcx: TyCtxt<'a, 'tcx, 'tcx>,
param_env: ParamEnv<'tcx>,
def_id: DefId,
substs: &'tcx Substs<'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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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<'a, 'tcx> HashStable<StableHashingContext<'a>> for Instance<'tcx>
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impl<'a, 'tcx> HashStable<StableHashingContext<'a>> for Instance<'tcx>
fn hash_stable<W: StableHasherResult>(
&self,
__ctx: &mut StableHashingContext<'a>,
__hasher: &mut StableHasher<W>
)
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fn hash_stable<W: StableHasherResult>(
&self,
__ctx: &mut StableHashingContext<'a>,
__hasher: &mut StableHasher<W>
)
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impl<'tcx> Key for Instance<'tcx>
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impl<'tcx> Key for Instance<'tcx>
fn query_crate(&self) -> CrateNum
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fn query_crate(&self) -> CrateNum
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Given an instance of this key, what crate is it referring to? This is used to find the provider. Read more
fn default_span(&self, tcx: TyCtxt) -> Span
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fn default_span(&self, tcx: TyCtxt) -> Span
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In the event that a cycle occurs, if no explicit span has been given for a query with key self
, what span should we use? Read more
impl<'tcx> Copy for Instance<'tcx>
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impl<'tcx> Copy for Instance<'tcx>
impl<'tcx> Clone for Instance<'tcx>
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impl<'tcx> Clone for Instance<'tcx>
fn clone(&self) -> Instance<'tcx>
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fn clone(&self) -> Instance<'tcx>
Returns a copy of the value. Read more
fn clone_from(&mut self, source: &Self)
1.0.0[src]
fn clone_from(&mut self, source: &Self)
Performs copy-assignment from source
. Read more
impl<'tcx> PartialEq for Instance<'tcx>
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impl<'tcx> PartialEq for Instance<'tcx>
fn eq(&self, other: &Instance<'tcx>) -> bool
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fn eq(&self, other: &Instance<'tcx>) -> bool
This method tests for self
and other
values to be equal, and is used by ==
. Read more
fn ne(&self, other: &Instance<'tcx>) -> bool
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fn ne(&self, other: &Instance<'tcx>) -> bool
This method tests for !=
.
impl<'tcx> Eq for Instance<'tcx>
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impl<'tcx> Eq for Instance<'tcx>
fn assert_receiver_is_total_eq(&self)
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fn assert_receiver_is_total_eq(&self)
impl<'tcx> Hash for Instance<'tcx>
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impl<'tcx> Hash for Instance<'tcx>
fn hash<__H: Hasher>(&self, state: &mut __H)
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fn hash<__H: Hasher>(&self, state: &mut __H)
Feeds this value into the given [Hasher
]. Read more
fn hash_slice<H>(data: &[Self], state: &mut H) where
H: Hasher,
1.3.0[src]
fn hash_slice<H>(data: &[Self], state: &mut H) where
H: Hasher,
Feeds a slice of this type into the given [Hasher
]. Read more
impl<'tcx> Debug for Instance<'tcx>
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impl<'tcx> Debug for Instance<'tcx>
fn fmt(&self, f: &mut Formatter) -> Result
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fn fmt(&self, f: &mut Formatter) -> Result
Formats the value using the given formatter. Read more
impl<'tcx> Encodable for Instance<'tcx>
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impl<'tcx> Encodable for Instance<'tcx>
fn encode<__S: Encoder>(&self, s: &mut __S) -> Result<(), __S::Error>
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fn encode<__S: Encoder>(&self, s: &mut __S) -> Result<(), __S::Error>
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impl<'tcx> Decodable for Instance<'tcx>
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impl<'tcx> Decodable for Instance<'tcx>
fn decode<__D: Decoder>(d: &mut __D) -> Result<Instance<'tcx>, __D::Error>
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fn decode<__D: Decoder>(d: &mut __D) -> Result<Instance<'tcx>, __D::Error>
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impl<'tcx> Display for Instance<'tcx>
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impl<'tcx> Display for Instance<'tcx>
fn fmt(&self, f: &mut Formatter) -> Result
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fn fmt(&self, f: &mut Formatter) -> Result
Formats the value using the given formatter. Read more
impl<'a, 'tcx> Lift<'tcx> for Instance<'a>
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impl<'a, 'tcx> Lift<'tcx> for Instance<'a>
type Lifted = Instance<'tcx>
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fn lift_to_tcx<'b, 'gcx>(
&self,
tcx: TyCtxt<'b, 'gcx, 'tcx>
) -> Option<Instance<'tcx>>
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fn lift_to_tcx<'b, 'gcx>(
&self,
tcx: TyCtxt<'b, 'gcx, 'tcx>
) -> Option<Instance<'tcx>>
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impl<'tcx> TypeFoldable<'tcx> for Instance<'tcx>
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impl<'tcx> TypeFoldable<'tcx> for Instance<'tcx>
fn super_fold_with<'gcx: 'tcx, F: TypeFolder<'gcx, 'tcx>>(
&self,
folder: &mut F
) -> Self
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fn super_fold_with<'gcx: 'tcx, F: TypeFolder<'gcx, 'tcx>>(
&self,
folder: &mut F
) -> Self
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fn super_visit_with<V: TypeVisitor<'tcx>>(&self, visitor: &mut V) -> bool
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fn super_visit_with<V: TypeVisitor<'tcx>>(&self, visitor: &mut V) -> bool
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fn fold_with<'gcx: 'tcx, F: TypeFolder<'gcx, 'tcx>>(
&self,
folder: &mut F
) -> Self
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fn fold_with<'gcx: 'tcx, F: TypeFolder<'gcx, 'tcx>>(
&self,
folder: &mut F
) -> Self
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fn visit_with<V: TypeVisitor<'tcx>>(&self, visitor: &mut V) -> bool
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fn visit_with<V: TypeVisitor<'tcx>>(&self, visitor: &mut V) -> bool
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fn has_regions_bound_at_or_above(&self, binder: DebruijnIndex) -> bool
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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. Read more
fn has_regions_bound_above(&self, binder: DebruijnIndex) -> bool
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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). Read more
fn has_escaping_regions(&self) -> bool
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fn has_escaping_regions(&self) -> bool
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fn has_type_flags(&self, flags: TypeFlags) -> 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 has_projections(&self) -> bool
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fn references_error(&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_param_types(&self) -> bool
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fn has_self_ty(&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 has_infer_types(&self) -> bool
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fn needs_infer(&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 has_skol(&self) -> bool
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fn needs_subst(&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_re_skol(&self) -> bool
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fn has_closure_types(&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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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. Read more
fn has_erasable_regions(&self) -> bool
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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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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. Read more
fn has_late_bound_regions(&self) -> bool
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fn has_late_bound_regions(&self) -> bool
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True if there are any late-bound regions