Enum rustc_infer::infer::SubregionOrigin
source · pub enum SubregionOrigin<'tcx> {
Subtype(Box<TypeTrace<'tcx>>),
RelateObjectBound(Span),
RelateParamBound(Span, Ty<'tcx>, Option<Span>),
RelateRegionParamBound(Span),
Reborrow(Span),
ReborrowUpvar(Span, UpvarId),
DataBorrowed(Ty<'tcx>, Span),
ReferenceOutlivesReferent(Ty<'tcx>, Span),
CompareImplItemObligation {
span: Span,
impl_item_def_id: LocalDefId,
trait_item_def_id: DefId,
},
CheckAssociatedTypeBounds {
parent: Box<SubregionOrigin<'tcx>>,
impl_item_def_id: LocalDefId,
trait_item_def_id: DefId,
},
AscribeUserTypeProvePredicate(Span),
}
Expand description
The origin of a r1 <= r2
constraint.
See error_reporting
module for more details
Variants§
Subtype(Box<TypeTrace<'tcx>>)
Arose from a subtyping relation
RelateObjectBound(Span)
When casting &'a T
to an &'b Trait
object,
relating 'a
to 'b
RelateParamBound(Span, Ty<'tcx>, Option<Span>)
Some type parameter was instantiated with the given type, and that type must outlive some region.
RelateRegionParamBound(Span)
The given region parameter was instantiated with a region that must outlive some other region.
Reborrow(Span)
Creating a pointer b
to contents of another reference
ReborrowUpvar(Span, UpvarId)
Creating a pointer b
to contents of an upvar
DataBorrowed(Ty<'tcx>, Span)
Data with type Ty<'tcx>
was borrowed
ReferenceOutlivesReferent(Ty<'tcx>, Span)
(&’a &’b T) where a >= b
CompareImplItemObligation
Comparing the signature and requirements of an impl method against the containing trait.
CheckAssociatedTypeBounds
Checking that the bounds of a trait’s associated type hold for a given impl
AscribeUserTypeProvePredicate(Span)
Implementations§
source§impl<'tcx> SubregionOrigin<'tcx>
impl<'tcx> SubregionOrigin<'tcx>
pub fn to_constraint_category(&self) -> ConstraintCategory<'tcx>
source§impl<'tcx> SubregionOrigin<'tcx>
impl<'tcx> SubregionOrigin<'tcx>
pub fn span(&self) -> Span
pub fn from_obligation_cause<F>(
cause: &ObligationCause<'tcx>,
default: F
) -> Selfwhere
F: FnOnce() -> Self,
Trait Implementations§
source§impl<'tcx> Clone for SubregionOrigin<'tcx>
impl<'tcx> Clone for SubregionOrigin<'tcx>
source§fn clone(&self) -> SubregionOrigin<'tcx>
fn clone(&self) -> SubregionOrigin<'tcx>
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moreAuto Trait Implementations§
impl<'tcx> !RefUnwindSafe for SubregionOrigin<'tcx>
impl<'tcx> !Send for SubregionOrigin<'tcx>
impl<'tcx> !Sync for SubregionOrigin<'tcx>
impl<'tcx> Unpin for SubregionOrigin<'tcx>
impl<'tcx> !UnwindSafe for SubregionOrigin<'tcx>
Blanket Implementations§
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: 32 bytes
Size for each variant:
Subtype
: 12 bytesRelateObjectBound
: 8 bytesRelateParamBound
: 28 bytesRelateRegionParamBound
: 8 bytesReborrow
: 8 bytesReborrowUpvar
: 20 bytesDataBorrowed
: 20 bytesReferenceOutlivesReferent
: 20 bytesCompareImplItemObligation
: 20 bytesCheckAssociatedTypeBounds
: 20 bytesAscribeUserTypeProvePredicate
: 8 bytes