Enum rustc_middle::ty::UpvarCapture

pub enum UpvarCapture<'tcx> {
    ByValue(Option<Span>),
    ByRef(UpvarBorrow<'tcx>),
}

Information describing the capture of an upvar. This is computed during typeck, specifically by regionck.

Variants

ByValue(Option<Span>)

Upvar is captured by value. This is always true when the closure is labeled move, but can also be true in other cases depending on inference.

If the upvar was inferred to be captured by value (e.g. move was not used), then the Span points to a usage that required it. There may be more than one such usage (e.g. || { a; a; }), in which case we pick an arbitrary one.

ByRef(UpvarBorrow<'tcx>)

Upvar is captured by reference.

Trait Implementations

impl<'tcx> Clone for UpvarCapture<'tcx>

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

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<'tcx> Copy for UpvarCapture<'tcx>

impl<'tcx> Debug for UpvarCapture<'tcx>

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

Formats the value using the given formatter.

impl<'tcx, __D: TyDecoder<'tcx>> Decodable<__D> for UpvarCapture<'tcx>

fn decode(__decoder: &mut __D) -> Result<Self, <__D as Decoder>::Error>

impl<'tcx, __E: TyEncoder<'tcx>> Encodable<__E> for UpvarCapture<'tcx>

fn encode(&self, __encoder: &mut __E) -> Result<(), <__E as Encoder>::Error>

impl<'tcx, '__ctx> HashStable<StableHashingContext<'__ctx>> for UpvarCapture<'tcx>

fn hash_stable(
    &self,
    __hcx: &mut StableHashingContext<'__ctx>,
    __hasher: &mut StableHasher
)

impl<'tcx> PartialEq<UpvarCapture<'tcx>> for UpvarCapture<'tcx>

fn eq(&self, other: &UpvarCapture<'tcx>) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &UpvarCapture<'tcx>) -> bool

This method tests for !=.

impl<'tcx> StructuralPartialEq for UpvarCapture<'tcx>