Enum rustc_borrowck::diagnostics::region_errors::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

Fields

type_test: TypeTest<'tcx>

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

UnexpectedHiddenRegion

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.

An unexpected hidden region for an opaque type.

BoundUniversalRegionError

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.

Higher-ranked subtyping error.

RegionError

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.

Any other lifetime error.

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: 80 bytes

Size for each variant:

• TypeTestError: 79 bytes
• UnexpectedHiddenRegion: 47 bytes
• BoundUniversalRegionError: 47 bytes
• RegionError: 27 bytes