Struct rustc_const_eval::check_consts::qualifs::NeedsDrop
source · pub struct NeedsDrop;
Expand description
Constant containing an ADT that implements Drop
.
This must be ruled out because implicit promotion would remove side-effects
that occur as part of dropping that value. N.B., the implicit promotion has
to reject const Drop implementations because even if side-effects are ruled
out through other means, the execution of the drop could diverge.
Trait Implementations§
source§impl Qualif for NeedsDrop
impl Qualif for NeedsDrop
source§const ANALYSIS_NAME: &'static str = "flow_needs_drop"
const ANALYSIS_NAME: &'static str = "flow_needs_drop"
The name of the file used to debug the dataflow analysis that computes this qualif.
source§const IS_CLEARED_ON_MOVE: bool = true
const IS_CLEARED_ON_MOVE: bool = true
Whether this
Qualif
is cleared when a local is moved from.source§fn in_qualifs(qualifs: &ConstQualifs) -> bool
fn in_qualifs(qualifs: &ConstQualifs) -> bool
Extracts the field of
ConstQualifs
that corresponds to this Qualif
.source§fn in_adt_inherently<'tcx>(
cx: &ConstCx<'_, 'tcx>,
adt: AdtDef<'tcx>,
_: GenericArgsRef<'tcx>,
) -> bool
fn in_adt_inherently<'tcx>( cx: &ConstCx<'_, 'tcx>, adt: AdtDef<'tcx>, _: GenericArgsRef<'tcx>, ) -> bool
source§fn deref_structural<'tcx>(_cx: &ConstCx<'_, 'tcx>) -> bool
fn deref_structural<'tcx>(_cx: &ConstCx<'_, 'tcx>) -> bool
Returns
true
if this Qualif
behaves sructurally for pointers and references:
the pointer/reference qualifies if and only if the pointee qualifies. Read moresource§const ALLOW_PROMOTED: bool = false
const ALLOW_PROMOTED: bool = false
Whether this
Qualif
might be evaluated after the promotion and can encounter a promoted.Auto Trait Implementations§
impl Freeze for NeedsDrop
impl RefUnwindSafe for NeedsDrop
impl Send for NeedsDrop
impl Sync for NeedsDrop
impl Unpin for NeedsDrop
impl UnwindSafe for NeedsDrop
Blanket Implementations§
source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more
source§impl<T, R> CollectAndApply<T, R> for T
impl<T, R> CollectAndApply<T, R> for T
source§impl<T> Filterable for T
impl<T> Filterable for T
source§fn filterable(
self,
filter_name: &'static str,
) -> RequestFilterDataProvider<T, fn(_: DataRequest<'_>) -> bool>
fn filterable( self, filter_name: &'static str, ) -> RequestFilterDataProvider<T, fn(_: DataRequest<'_>) -> bool>
Creates a filterable data provider with the given name for debugging. Read more
source§impl<T> Instrument for T
impl<T> Instrument for T
source§fn instrument(self, span: Span) -> Instrumented<Self>
fn instrument(self, span: Span) -> Instrumented<Self>
source§fn in_current_span(self) -> Instrumented<Self>
fn in_current_span(self) -> Instrumented<Self>
source§impl<T> IntoEither for T
impl<T> IntoEither for T
source§fn into_either(self, into_left: bool) -> Either<Self, Self>
fn into_either(self, into_left: bool) -> Either<Self, Self>
Converts
self
into a Left
variant of Either<Self, Self>
if into_left
is true
.
Converts self
into a Right
variant of Either<Self, Self>
otherwise. Read moresource§fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
Converts
self
into a Left
variant of Either<Self, Self>
if into_left(&self)
returns true
.
Converts self
into a Right
variant of Either<Self, Self>
otherwise. Read moresource§impl<P> IntoQueryParam<P> for P
impl<P> IntoQueryParam<P> for P
fn into_query_param(self) -> P
source§impl<T> MaybeResult<T> for T
impl<T> MaybeResult<T> for T
source§impl<I, T, U> Upcast<I, U> for Twhere
U: UpcastFrom<I, T>,
impl<I, T, U> Upcast<I, U> for Twhere
U: UpcastFrom<I, T>,
source§impl<I, T> UpcastFrom<I, T> for T
impl<I, T> UpcastFrom<I, T> for T
fn upcast_from(from: T, _tcx: I) -> T
source§impl<Tcx, T> Value<Tcx> for Twhere
Tcx: DepContext,
impl<Tcx, T> Value<Tcx> for Twhere
Tcx: DepContext,
default fn from_cycle_error( tcx: Tcx, cycle_error: &CycleError, _guar: ErrorGuaranteed, ) -> T
source§impl<T> WithSubscriber for T
impl<T> WithSubscriber for T
source§fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
source§fn with_current_subscriber(self) -> WithDispatch<Self>
fn with_current_subscriber(self) -> WithDispatch<Self>
impl<'a, T> Captures<'a> for Twhere
T: ?Sized,
impl<T> ErasedDestructor for Twhere
T: 'static,
impl<T> MaybeSendSync for T
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: 0 bytes