Enum rustc_middle::traits::SelectionError
source · pub enum SelectionError<'tcx> {
Unimplemented,
OutputTypeParameterMismatch(Box<SelectionOutputTypeParameterMismatch<'tcx>>),
TraitNotObjectSafe(DefId),
NotConstEvaluatable(NotConstEvaluatable),
Overflow(OverflowError),
ErrorReporting,
OpaqueTypeAutoTraitLeakageUnknown(DefId),
}Variants§
Unimplemented
The trait is not implemented.
OutputTypeParameterMismatch(Box<SelectionOutputTypeParameterMismatch<'tcx>>)
After a closure impl has selected, its “outputs” were evaluated
(which for closures includes the “input” type params) and they
didn’t resolve. See confirm_poly_trait_refs for more.
TraitNotObjectSafe(DefId)
The trait pointed by DefId is not object safe.
NotConstEvaluatable(NotConstEvaluatable)
A given constant couldn’t be evaluated.
Overflow(OverflowError)
Exceeded the recursion depth during type projection.
ErrorReporting
Signaling that an error has already been emitted, to avoid multiple errors being shown.
OpaqueTypeAutoTraitLeakageUnknown(DefId)
Computing an opaque type’s hidden type caused an error (e.g. a cycle error). We can thus not know whether the hidden type implements an auto trait, so we should not presume anything about it.
Trait Implementations§
source§impl<'tcx> Clone for SelectionError<'tcx>
impl<'tcx> Clone for SelectionError<'tcx>
source§fn clone(&self) -> SelectionError<'tcx>
fn clone(&self) -> SelectionError<'tcx>
Returns a copy of the value. Read more
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
Performs copy-assignment from
source. Read moresource§impl<'tcx> Debug for SelectionError<'tcx>
impl<'tcx> Debug for SelectionError<'tcx>
source§impl<'tcx> From<OverflowError> for SelectionError<'tcx>
impl<'tcx> From<OverflowError> for SelectionError<'tcx>
source§fn from(overflow_error: OverflowError) -> SelectionError<'tcx>
fn from(overflow_error: OverflowError) -> SelectionError<'tcx>
Converts to this type from the input type.
source§impl<'tcx> TypeVisitable<TyCtxt<'tcx>> for SelectionError<'tcx>
impl<'tcx> TypeVisitable<TyCtxt<'tcx>> for SelectionError<'tcx>
source§fn visit_with<__V: TypeVisitor<TyCtxt<'tcx>>>(
&self,
__visitor: &mut __V
) -> ControlFlow<__V::BreakTy>
fn visit_with<__V: TypeVisitor<TyCtxt<'tcx>>>( &self, __visitor: &mut __V ) -> ControlFlow<__V::BreakTy>
Auto Trait Implementations§
impl<'tcx> !RefUnwindSafe for SelectionError<'tcx>
impl<'tcx> Send for SelectionError<'tcx>
impl<'tcx> Sync for SelectionError<'tcx>
impl<'tcx> Unpin for SelectionError<'tcx>
impl<'tcx> !UnwindSafe for SelectionError<'tcx>
Blanket Implementations§
source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere T: ?Sized,
source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more
source§impl<T, R> CollectAndApply<T, R> for T
impl<T, R> CollectAndApply<T, R> for T
source§impl<P> IntoQueryParam<P> for P
impl<P> IntoQueryParam<P> for P
fn into_query_param(self) -> P
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> TypeVisitableExt<'tcx> for Twhere
T: TypeVisitable<TyCtxt<'tcx>>,
impl<'tcx, T> TypeVisitableExt<'tcx> for Twhere T: TypeVisitable<TyCtxt<'tcx>>,
source§fn has_vars_bound_at_or_above(&self, binder: DebruijnIndex) -> bool
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.source§fn has_vars_bound_above(&self, binder: DebruijnIndex) -> bool
fn has_vars_bound_above(&self, binder: DebruijnIndex) -> bool
Returns
true if this type has any regions that escape binder (and
hence are not bound by it).source§fn has_escaping_bound_vars(&self) -> bool
fn has_escaping_bound_vars(&self) -> bool
Return
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_inherent_projections(&self) -> bool
fn has_opaque_types(&self) -> bool
fn has_generators(&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 has_infer(&self) -> bool
fn has_placeholders(&self) -> bool
fn has_non_region_placeholders(&self) -> bool
fn has_param(&self) -> bool
source§fn has_free_regions(&self) -> bool
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.
fn has_erased_regions(&self) -> bool
source§fn has_erasable_regions(&self) -> bool
fn has_erasable_regions(&self) -> bool
True if there are any un-erased free regions.
source§fn is_global(&self) -> bool
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.
source§fn has_late_bound_regions(&self) -> bool
fn has_late_bound_regions(&self) -> bool
True if there are any late-bound regions
source§fn has_non_region_late_bound(&self) -> bool
fn has_non_region_late_bound(&self) -> bool
True if there are any late-bound non-region variables
source§fn has_late_bound_vars(&self) -> bool
fn has_late_bound_vars(&self) -> bool
True if there are any late-bound variables
source§fn still_further_specializable(&self) -> bool
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.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, cycle: &[QueryInfo], _guar: ErrorGuaranteed ) -> 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
Size for each variant:
Unimplemented: 0 bytesOutputTypeParameterMismatch: 15 bytesTraitNotObjectSafe: 11 bytesNotConstEvaluatable: 1 byteOverflow: 1 byteErrorReporting: 0 bytesOpaqueTypeAutoTraitLeakageUnknown: 11 bytes