Struct rustc_middle::ty::OpaqueHiddenType
source · Fields§
§span: Span
The span of this particular definition of the opaque type. So for example:
type Foo = impl Baz;
fn bar() -> Foo {
// ^^^ This is the span we are looking for!
}
In cases where the fn returns (impl Trait, impl Trait)
or
other such combinations, the result is currently
over-approximated, but better than nothing.
ty: Ty<'tcx>
The type variable that represents the value of the opaque type that we require. In other words, after we compile this function, we will be created a constraint like:
Foo<'a, T> = ?C
where ?C
is the value of this type variable. =) It may
naturally refer to the type and lifetime parameters in scope
in this function, though ultimately it should only reference
those that are arguments to Foo
in the constraint above. (In
other words, ?C
should not include 'b
, even though it’s a
lifetime parameter on foo
.)
Implementations§
source§impl<'tcx> OpaqueHiddenType<'tcx>
impl<'tcx> OpaqueHiddenType<'tcx>
pub fn report_mismatch(&self, other: &Self, tcx: TyCtxt<'tcx>)
pub fn remap_generic_params_to_declaration_params(
self,
opaque_type_key: OpaqueTypeKey<'tcx>,
tcx: TyCtxt<'tcx>,
ignore_errors: bool,
origin: OpaqueTyOrigin
) -> Self
Trait Implementations§
source§impl<'tcx> Clone for OpaqueHiddenType<'tcx>
impl<'tcx> Clone for OpaqueHiddenType<'tcx>
source§fn clone(&self) -> OpaqueHiddenType<'tcx>
fn clone(&self) -> OpaqueHiddenType<'tcx>
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moresource§impl<'tcx> Debug for OpaqueHiddenType<'tcx>
impl<'tcx> Debug for OpaqueHiddenType<'tcx>
source§impl<'tcx, '__ctx> HashStable<StableHashingContext<'__ctx>> for OpaqueHiddenType<'tcx>
impl<'tcx, '__ctx> HashStable<StableHashingContext<'__ctx>> for OpaqueHiddenType<'tcx>
fn hash_stable(
&self,
__hcx: &mut StableHashingContext<'__ctx>,
__hasher: &mut StableHasher
)
source§impl<'tcx> TypeFoldable<'tcx> for OpaqueHiddenType<'tcx>
impl<'tcx> TypeFoldable<'tcx> for OpaqueHiddenType<'tcx>
source§fn try_fold_with<__F: FallibleTypeFolder<'tcx>>(
self,
__folder: &mut __F
) -> Result<Self, __F::Error>
fn try_fold_with<__F: FallibleTypeFolder<'tcx>>(
self,
__folder: &mut __F
) -> Result<Self, __F::Error>
source§impl<'tcx> TypeVisitable<'tcx> for OpaqueHiddenType<'tcx>
impl<'tcx> TypeVisitable<'tcx> for OpaqueHiddenType<'tcx>
source§fn visit_with<__V: TypeVisitor<'tcx>>(
&self,
__visitor: &mut __V
) -> ControlFlow<__V::BreakTy>
fn visit_with<__V: TypeVisitor<'tcx>>(
&self,
__visitor: &mut __V
) -> ControlFlow<__V::BreakTy>
source§fn has_vars_bound_at_or_above(&self, binder: DebruijnIndex) -> bool
fn has_vars_bound_at_or_above(&self, binder: DebruijnIndex) -> bool
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 moresource§fn has_vars_bound_above(&self, binder: DebruijnIndex) -> bool
fn has_vars_bound_above(&self, binder: DebruijnIndex) -> bool
true
if this type has any regions that escape binder
(and
hence are not bound by it). Read moresource§fn has_escaping_bound_vars(&self) -> bool
fn has_escaping_bound_vars(&self) -> bool
true
if this type has regions that are not a part of the type.
For example, for<'a> fn(&'a i32)
return false
, while fn(&'a i32)
would return true
. The latter can occur when traversing through the
former. Read morefn has_type_flags(&self, flags: TypeFlags) -> bool
fn has_projections(&self) -> bool
fn has_opaque_types(&self) -> bool
fn references_error(&self) -> bool
fn error_reported(&self) -> Result<(), ErrorGuaranteed>
fn has_non_region_param(&self) -> bool
fn has_infer_regions(&self) -> bool
fn has_infer_types(&self) -> bool
fn has_non_region_infer(&self) -> bool
fn needs_infer(&self) -> bool
fn has_placeholders(&self) -> bool
fn needs_subst(&self) -> bool
source§fn has_free_regions(&self) -> bool
fn has_free_regions(&self) -> bool
fn has_erased_regions(&self) -> bool
source§fn has_erasable_regions(&self) -> bool
fn has_erasable_regions(&self) -> bool
source§fn is_global(&self) -> bool
fn is_global(&self) -> bool
source§fn has_late_bound_regions(&self) -> bool
fn has_late_bound_regions(&self) -> bool
source§fn still_further_specializable(&self) -> bool
fn still_further_specializable(&self) -> bool
impl
specialization. Read moreimpl<'tcx> Copy for OpaqueHiddenType<'tcx>
Auto Trait Implementations§
impl<'tcx> !RefUnwindSafe for OpaqueHiddenType<'tcx>
impl<'tcx> !Send for OpaqueHiddenType<'tcx>
impl<'tcx> !Sync for OpaqueHiddenType<'tcx>
impl<'tcx> Unpin for OpaqueHiddenType<'tcx>
impl<'tcx> !UnwindSafe for OpaqueHiddenType<'tcx>
Blanket Implementations§
source§impl<'tcx, T> ArenaAllocatable<'tcx, IsCopy> for Twhere
T: Copy,
impl<'tcx, T> ArenaAllocatable<'tcx, IsCopy> for Twhere
T: Copy,
fn allocate_on<'a>(self, arena: &'a Arena<'tcx>) -> &'a mut T
fn allocate_from_iter<'a>(
arena: &'a Arena<'tcx>,
iter: impl IntoIterator<Item = T>
) -> &'a mut [T] ⓘ
source§impl<Tcx, T> DepNodeParams<Tcx> for Twhere
Tcx: DepContext,
T: for<'a> HashStable<StableHashingContext<'a>> + Debug,
impl<Tcx, T> DepNodeParams<Tcx> for Twhere
Tcx: DepContext,
T: for<'a> HashStable<StableHashingContext<'a>> + Debug,
default fn fingerprint_style() -> FingerprintStyle
source§default fn to_fingerprint(&self, tcx: Tcx) -> Fingerprint
default fn to_fingerprint(&self, tcx: Tcx) -> Fingerprint
default fn to_debug_str(&self, _: Tcx) -> String
source§default fn recover(
_: Tcx,
_: &DepNode<<Tcx as DepContext>::DepKind>
) -> Option<T>
default fn recover(
_: Tcx,
_: &DepNode<<Tcx as DepContext>::DepKind>
) -> Option<T>
DepNode
,
something which is needed when forcing DepNode
s during red-green
evaluation. The query system will only call this method if
fingerprint_style()
is not FingerprintStyle::Opaque
.
It is always valid to return None
here, in which case incremental
compilation will treat the query as having changed instead of forcing it. Read moresource§impl<T, R> InternIteratorElement<T, R> for T
impl<T, R> InternIteratorElement<T, R> for T
type Output = R
fn intern_with<I, F>(iter: I, f: F) -> <T as InternIteratorElement<T, R>>::Outputwhere
I: Iterator<Item = T>,
F: FnOnce(&[T]) -> R,
source§impl<T> MaybeResult<T> for T
impl<T> MaybeResult<T> for T
source§impl<'tcx, T> ToPredicate<'tcx, T> for T
impl<'tcx, T> ToPredicate<'tcx, T> for T
fn to_predicate(self, _tcx: TyCtxt<'tcx>) -> T
source§impl<Tcx, T> Value<Tcx> for Twhere
Tcx: DepContext,
impl<Tcx, T> Value<Tcx> for Twhere
Tcx: DepContext,
default fn from_cycle_error(tcx: Tcx, _: &[QueryInfo]) -> T
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