Enum RegionVariableOrigin 

pub enum RegionVariableOrigin<'tcx> {
    Misc(Span),
    PatternRegion(Span),
    BorrowRegion(Span),
    Autoref(Span),
    Coercion(Span),
    RegionParameterDefinition(Span, Symbol),
    BoundRegion(Span, BoundRegionKind, BoundRegionConversionTime),
    UpvarRegion(UpvarId, Span),
    Nll(NllRegionVariableOrigin<'tcx>),
}

Reasons to create a region inference variable.

See error_reporting module for more details.

Variants

Misc(Span)

Region variables created for ill-categorized reasons.

They mostly indicate places in need of refactoring.

PatternRegion(Span)

Regions created by a &P or [...] pattern.

BorrowRegion(Span)

Regions created by & operator.

Autoref(Span)

Regions created as part of an autoref of a method receiver.

Coercion(Span)

Regions created as part of an automatic coercion.

RegionParameterDefinition(Span, Symbol)

Region variables created as the values for early-bound regions.

FIXME(@lcnr): This should also store a DefId, similar to TypeVariableOrigin.

BoundRegion(Span, BoundRegionKind, BoundRegionConversionTime)

Region variables created when instantiating a binder with existential variables, e.g. when calling a function or method.

UpvarRegion(UpvarId, Span)

Nll(NllRegionVariableOrigin<'tcx>)

This origin is used for the inference variables that we create during NLL region processing.

Implementations

impl<'tcx> RegionVariableOrigin<'tcx>

pub fn span(&self) -> Span

Trait Implementations

impl<'tcx> Clone for RegionVariableOrigin<'tcx>

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

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<'tcx> Debug for RegionVariableOrigin<'tcx>

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

Formats the value using the given formatter.

impl<'tcx> Copy for RegionVariableOrigin<'tcx>

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: 24 bytes

Size for each variant:

• Misc: 12 bytes
• PatternRegion: 12 bytes
• BorrowRegion: 12 bytes
• Autoref: 12 bytes
• Coercion: 12 bytes
• RegionParameterDefinition: 16 bytes
• BoundRegion: 24 bytes
• UpvarRegion: 24 bytes
• Nll: 20 bytes