Enum rustc_infer::infer::RegionResolutionError

pub enum RegionResolutionError<'tcx> {
    ConcreteFailure(SubregionOrigin<'tcx>, Region<'tcx>, Region<'tcx>),
    GenericBoundFailure(SubregionOrigin<'tcx>, GenericKind<'tcx>, Region<'tcx>),
    SubSupConflict(RegionVid, RegionVariableOrigin, SubregionOrigin<'tcx>, Region<'tcx>, SubregionOrigin<'tcx>, Region<'tcx>),
    UpperBoundUniverseConflict(RegionVid, RegionVariableOrigin, UniverseIndex, SubregionOrigin<'tcx>, Region<'tcx>),
    MemberConstraintFailure {
        span: Span,
        hidden_ty: Ty<'tcx>,
        member_region: Region<'tcx>,
    },
}

Variants

ConcreteFailure

ConcreteFailure(o, a, b):

o requires that a <= b, but this does not hold

Tuple Fields of ConcreteFailure

0: SubregionOrigin<'tcx>1: Region<'tcx>2: Region<'tcx>

GenericBoundFailure

`GenericBoundFailure(p, s, a)

The parameter/associated-type p must be known to outlive the lifetime a (but none of the known bounds are sufficient).

Tuple Fields of GenericBoundFailure

0: SubregionOrigin<'tcx>1: GenericKind<'tcx>2: Region<'tcx>

SubSupConflict

SubSupConflict(v, v_origin, sub_origin, sub_r, sup_origin, sup_r):

Could not infer a value for v (which has origin v_origin) because sub_r <= v (due to sub_origin) but v <= sup_r (due to sup_origin) and sub_r <= sup_r does not hold.

Tuple Fields of SubSupConflict

0: RegionVid1: RegionVariableOrigin2: SubregionOrigin<'tcx>3: Region<'tcx>4: SubregionOrigin<'tcx>5: Region<'tcx>

UpperBoundUniverseConflict

Indicates a 'b: 'a constraint where 'a is in a universe that cannot name the placeholder 'b.

Tuple Fields of UpperBoundUniverseConflict

0: RegionVid1: RegionVariableOrigin2: UniverseIndex3: SubregionOrigin<'tcx>4: Region<'tcx>

MemberConstraintFailure

Indicates a failure of a MemberConstraint. These arise during impl trait processing explicitly – basically, the impl trait’s hidden type included some region that it was not supposed to.

Fields of MemberConstraintFailure

span: Spanhidden_ty: Ty<'tcx>member_region: Region<'tcx>

Trait Implementations

impl<'tcx> Clone for RegionResolutionError<'tcx>

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

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<'tcx> Debug for RegionResolutionError<'tcx>

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

Formats the value using the given formatter.

Layout

Note: Most layout information is completely unstable and may be different between compiler versions and platforms. 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: 144 bytes