Enum rustc_trait_selection::infer::RegionResolutionError

pub enum RegionResolutionError<'tcx> {
    ConcreteFailure(SubregionOrigin<'tcx>, &'tcx RegionKind, &'tcx RegionKind),
    GenericBoundFailure(SubregionOrigin<'tcx>, GenericKind<'tcx>, &'tcx RegionKind),
    SubSupConflict(RegionVid, RegionVariableOrigin, SubregionOrigin<'tcx>, &'tcx RegionKind, SubregionOrigin<'tcx>, &'tcx RegionKind),
    UpperBoundUniverseConflict(RegionVid, RegionVariableOrigin, UniverseIndex, SubregionOrigin<'tcx>, &'tcx RegionKind),
}

Variants

ConcreteFailure(SubregionOrigin<'tcx>, &'tcx RegionKind, &'tcx RegionKind)

ConcreteFailure(o, a, b):

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

Tuple Fields of ConcreteFailure

0: SubregionOrigin<'tcx>1: &'tcx RegionKind2: &'tcx RegionKind

GenericBoundFailure(SubregionOrigin<'tcx>, GenericKind<'tcx>, &'tcx RegionKind)

`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: &'tcx RegionKind

SubSupConflict(RegionVid, RegionVariableOrigin, SubregionOrigin<'tcx>, &'tcx RegionKind, SubregionOrigin<'tcx>, &'tcx RegionKind)

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: &'tcx RegionKind4: SubregionOrigin<'tcx>5: &'tcx RegionKind

UpperBoundUniverseConflict(RegionVid, RegionVariableOrigin, UniverseIndex, SubregionOrigin<'tcx>, &'tcx RegionKind)

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: &'tcx RegionKind

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: 144 bytes

Size for each variant:

• ConcreteFailure: 52 bytes
• GenericBoundFailure: 68 bytes
• SubSupConflict: 140 bytes
• UpperBoundUniverseConflict: 108 bytes