Struct rustc_middle::ty::closure::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]

fn clone(&self) -> CaptureInfo<'tcx>[src]

Returns a copy of the value. Read more

fn clone_from(&mut self, source: &Self)1.0.0[src]

Performs copy-assignment from source. Read more

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

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

Formats the value using the given formatter. Read more

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

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

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

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

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

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

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

fn eq(&self, other: &CaptureInfo<'tcx>) -> bool[src]

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

fn ne(&self, other: &CaptureInfo<'tcx>) -> bool[src]

This method tests for !=.

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

fn super_fold_with<__F: TypeFolder<'tcx>>(self, __folder: &mut __F) -> Self[src]

fn super_visit_with<__F: TypeVisitor<'tcx>>(
    &self,
    __folder: &mut __F
) -> ControlFlow<__F::BreakTy>
[src]

fn fold_with<F: TypeFolder<'tcx>>(self, folder: &mut F) -> Self[src]

fn visit_with<V: TypeVisitor<'tcx>>(
    &self,
    visitor: &mut V
) -> ControlFlow<V::BreakTy>
[src]

fn has_vars_bound_at_or_above(&self, binder: DebruijnIndex) -> bool[src]

Returns true if self has any late-bound regions that are either bound by binder or bound by some binder outside of binder. If binder is ty::INNERMOST, this indicates whether there are any late-bound regions that appear free. Read more

fn has_vars_bound_above(&self, binder: DebruijnIndex) -> bool[src]

Returns true if this self has any regions that escape binder (and hence are not bound by it). Read more

fn has_escaping_bound_vars(&self) -> bool[src]

fn has_type_flags(&self, flags: TypeFlags) -> bool[src]

fn has_projections(&self) -> bool[src]

fn has_opaque_types(&self) -> bool[src]

fn references_error(&self) -> bool[src]

fn has_param_types_or_consts(&self) -> bool[src]

fn has_infer_regions(&self) -> bool[src]

fn has_infer_types(&self) -> bool[src]

fn has_infer_types_or_consts(&self) -> bool[src]

fn needs_infer(&self) -> bool[src]

fn has_placeholders(&self) -> bool[src]

fn needs_subst(&self) -> bool[src]

fn has_free_regions(&self) -> bool[src]

“Free” regions in this context means that it has any region that is not (a) erased or (b) late-bound. Read more

fn has_erased_regions(&self) -> bool[src]

fn has_erasable_regions(&self) -> bool[src]

True if there are any un-erased free regions.

fn is_global(&self) -> bool[src]

Indicates whether this value references only ‘global’ generic parameters that are the same regardless of what fn we are in. This is used for caching. Read more

fn has_late_bound_regions(&self) -> bool[src]

True if there are any late-bound regions

fn still_further_specializable(&self) -> bool[src]

Indicates whether this value still has parameters/placeholders/inference variables which could be replaced later, in a way that would change the results of impl specialization. Read more

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

impl<'tcx> StructuralPartialEq 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]

pub fn type_id(&self) -> TypeId[src]

Gets the TypeId of self. Read more

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

pub fn allocate_on(Self, &'a Arena<'tcx>) -> &'a mut T[src]

pub fn allocate_from_iter(
    &'a Arena<'tcx>,
    impl IntoIterator<Item = T>
) -> &'a mut [T]

Notable traits for &'_ [u8]

impl<'_> Read for &'_ [u8]impl<'_> Write for &'_ mut [u8]
[src]

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

pub fn borrow(&self) -> &T[src]

Immutably borrows from an owned value. Read more

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

pub fn borrow_mut(&mut self) -> &mut T[src]

Mutably borrows from an owned value. Read more

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

pub fn from(t: T) -> T[src]

Performs the conversion.

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

pub fn into(self) -> U[src]

Performs the conversion.

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

type Error = !

pub fn from(Result<T, <T as MaybeResult<T>>::Error>) -> T[src]

pub fn to_result(self) -> Result<T, <T as MaybeResult<T>>::Error>[src]

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

pub fn subst_spanned(Self, TyCtxt<'tcx>, &[GenericArg<'tcx>], Option<Span>) -> T[src]

fn subst(self, tcx: TyCtxt<'tcx>, substs: &[GenericArg<'tcx>]) -> Self[src]

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

type Owned = T

The resulting type after obtaining ownership.

pub fn to_owned(&self) -> T[src]

Creates owned data from borrowed data, usually by cloning. Read more

pub fn clone_into(&self, target: &mut T)[src]

🔬 This is a nightly-only experimental API. (toowned_clone_into)

recently added

Uses borrowed data to replace owned data, usually by cloning. Read more

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.

pub fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>[src]

Performs the conversion.

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.

pub fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>[src]

Performs the conversion.

impl<T> WithConstness for T[src]

fn with_constness(self, constness: Constness) -> ConstnessAnd<Self>[src]

fn with_const(self) -> ConstnessAnd<Self>[src]

fn without_const(self) -> ConstnessAnd<Self>[src]

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