Enum RegionErrorKind

pub(crate) enum RegionErrorKind<'tcx> {
    TypeTestError {
        type_test: TypeTest<'tcx>,
    },
    UnexpectedHiddenRegion {
        span: Span,
        hidden_ty: Ty<'tcx>,
        key: OpaqueTypeKey<'tcx>,
        member_region: Region<'tcx>,
    },
    BoundUniversalRegionError {
        longer_fr: RegionVid,
        error_element: RegionElement,
        placeholder: PlaceholderRegion,
    },
    RegionError {
        fr_origin: NllRegionVariableOrigin,
        longer_fr: RegionVid,
        shorter_fr: RegionVid,
        is_reported: bool,
    },
}

Variants

TypeTestError

A generic bound failure for a type test (T: 'a).

Fields

type_test: TypeTest<'tcx>

UnexpectedHiddenRegion

An unexpected hidden region for an opaque type.

Fields

span: Span

The span for the member constraint.

hidden_ty: Ty<'tcx>

The hidden type.

key: OpaqueTypeKey<'tcx>

The opaque type.

member_region: Region<'tcx>

The unexpected region.

BoundUniversalRegionError

Higher-ranked subtyping error.

Fields

longer_fr: RegionVid

The placeholder free region.

error_element: RegionElement

The region element that erroneously must be outlived by longer_fr.

placeholder: PlaceholderRegion

The placeholder region.

RegionError

Any other lifetime error.

Fields

fr_origin: NllRegionVariableOrigin

The origin of the region.

longer_fr: RegionVid

The region that should outlive shorter_fr.

shorter_fr: RegionVid

The region that should be shorter, but we can’t prove it.

is_reported: bool

Indicates whether this is a reported error. We currently only report the first error encountered and leave the rest unreported so as not to overwhelm the user.

Trait Implementations

impl<'tcx> Clone for RegionErrorKind<'tcx>

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

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<'tcx> Debug for RegionErrorKind<'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 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: 72 bytes

Size for each variant:

• TypeTestError: 72 bytes
• UnexpectedHiddenRegion: 48 bytes
• BoundUniversalRegionError: 56 bytes
• RegionError: 40 bytes