Struct rustc_middle::ty::CaptureInfo[][src]

pub struct CaptureInfo<'tcx> {
    pub capture_kind_expr_id: Option<HirId>,
    pub path_expr_id: Option<HirId>,
    pub capture_kind: UpvarCapture<'tcx>,
}

Part of MinCaptureInformationMap; describes the capture kind (&, &mut, move) for a particular capture as well as identifying the part of the source code that triggered this capture to occur.

Fields

capture_kind_expr_id: Option<HirId>

Expr Id pointing to use that resulted in selecting the current capture kind

Eg:

let mut t = (0,1);

let c = || {
    println!("{}",t); // L1
    t.1 = 4; // L2
};

capture_kind_expr_id will point to the use on L2 and path_expr_id will point to the use on L1.

If the user doesn’t enable feature capture_disjoint_fields (RFC 2229) then, it is possible that we don’t see the use of a particular place resulting in capture_kind_expr_id being None. In such case we fallback on uvpars_mentioned for span.

Eg:

let x = 5;

let c = || {
    let _ = x
};

In this example, if capture_disjoint_fields is not set, then x will be captured, but we won’t see it being used during capture analysis, since it’s essentially a discard.

path_expr_id: Option<HirId>

Expr Id pointing to use that resulted the corresponding place being captured

See capture_kind_expr_id for example.

capture_kind: UpvarCapture<'tcx>

Capture mode that was selected

Trait Implementations

impl<'tcx> Clone for CaptureInfo<'tcx>[src]

impl<'tcx> Copy for CaptureInfo<'tcx>[src]

impl<'tcx> Debug for CaptureInfo<'tcx>[src]

impl<'tcx, __D: TyDecoder<'tcx>> Decodable<__D> for CaptureInfo<'tcx>[src]

impl<'tcx, __E: TyEncoder<'tcx>> Encodable<__E> for CaptureInfo<'tcx>[src]

impl<'tcx, '__ctx> HashStable<StableHashingContext<'__ctx>> for CaptureInfo<'tcx>[src]

impl<'tcx> PartialEq<CaptureInfo<'tcx>> for CaptureInfo<'tcx>[src]

impl<'tcx> StructuralPartialEq for CaptureInfo<'tcx>[src]

impl<'tcx> TypeFoldable<'tcx> for CaptureInfo<'tcx>[src]

Auto Trait Implementations

impl<'tcx> RefUnwindSafe for CaptureInfo<'tcx>

impl<'tcx> !Send for CaptureInfo<'tcx>

impl<'tcx> !Sync for CaptureInfo<'tcx>

impl<'tcx> Unpin for CaptureInfo<'tcx>

impl<'tcx> UnwindSafe for CaptureInfo<'tcx>

Blanket Implementations

impl<T> Any for T where
    T: 'static + ?Sized
[src]

impl<'tcx, T> ArenaAllocatable<'tcx, ()> for T where
    T: Copy
[src]

impl<T> Borrow<T> for T where
    T: ?Sized
[src]

impl<T> BorrowMut<T> for T where
    T: ?Sized
[src]

impl<'a, T> Captures<'a> for T where
    T: ?Sized
[src]

impl<T> From<T> for T[src]

impl<T, U> Into<U> for T where
    U: From<T>, 
[src]

impl<T> MaybeResult<T> for T[src]

type Error = !

impl<'tcx, T> Subst<'tcx> for T where
    T: TypeFoldable<'tcx>, 
[src]

impl<T> ToOwned for T where
    T: Clone
[src]

type Owned = T

The resulting type after obtaining ownership.

impl<T, U> TryFrom<U> for T where
    U: Into<T>, 
[src]

type Error = Infallible

The type returned in the event of a conversion error.

impl<T, U> TryInto<U> for T where
    U: TryFrom<T>, 
[src]

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.

impl<T> WithConstness for T[src]