Struct rustc_const_eval::interpret::stack::LocalState
source · pub struct LocalState<'tcx, Prov: Provenance = CtfeProvenance> {
value: LocalValue<Prov>,
layout: Cell<Option<TyAndLayout<'tcx>>>,
}
Expand description
State of a local variable including a memoized layout
Fields§
§value: LocalValue<Prov>
§layout: Cell<Option<TyAndLayout<'tcx>>>
Don’t modify if Some
, this is only used to prevent computing the layout twice.
Avoids computing the layout of locals that are never actually initialized.
Implementations§
source§impl<'tcx, Prov: Provenance> LocalState<'tcx, Prov>
impl<'tcx, Prov: Provenance> LocalState<'tcx, Prov>
pub fn make_live_uninit(&mut self)
sourcepub fn as_mplace_or_imm(
&self,
) -> Option<Either<(Pointer<Option<Prov>>, MemPlaceMeta<Prov>), Immediate<Prov>>>
pub fn as_mplace_or_imm( &self, ) -> Option<Either<(Pointer<Option<Prov>>, MemPlaceMeta<Prov>), Immediate<Prov>>>
This is a hack because Miri needs a way to visit all the provenance in a LocalState
without having a layout or TyCtxt
available, and we want to keep the Operand
type
private.
sourcepub(super) fn access(&self) -> InterpResult<'tcx, &Operand<Prov>>
pub(super) fn access(&self) -> InterpResult<'tcx, &Operand<Prov>>
Read the local’s value or error if the local is not yet live or not live anymore.
sourcepub(super) fn access_mut(&mut self) -> InterpResult<'tcx, &mut Operand<Prov>>
pub(super) fn access_mut(&mut self) -> InterpResult<'tcx, &mut Operand<Prov>>
Overwrite the local. If the local can be overwritten in place, return a reference
to do so; otherwise return the MemPlace
to consult instead.
Trait Implementations§
source§impl<'tcx, Prov: Clone + Provenance> Clone for LocalState<'tcx, Prov>
impl<'tcx, Prov: Clone + Provenance> Clone for LocalState<'tcx, Prov>
source§fn clone(&self) -> LocalState<'tcx, Prov>
fn clone(&self) -> LocalState<'tcx, Prov>
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moreAuto Trait Implementations§
impl<'tcx, Prov = CtfeProvenance> !Freeze for LocalState<'tcx, Prov>
impl<'tcx, Prov = CtfeProvenance> !RefUnwindSafe for LocalState<'tcx, Prov>
impl<'tcx, Prov> Send for LocalState<'tcx, Prov>where
Prov: Send,
impl<'tcx, Prov = CtfeProvenance> !Sync for LocalState<'tcx, Prov>
impl<'tcx, Prov> Unpin for LocalState<'tcx, Prov>where
Prov: Unpin,
impl<'tcx, Prov = CtfeProvenance> !UnwindSafe for LocalState<'tcx, Prov>
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
source§impl<T> CloneToUninit for Twhere
T: Clone,
impl<T> CloneToUninit for Twhere
T: Clone,
source§unsafe fn clone_to_uninit(&self, dst: *mut T)
unsafe fn clone_to_uninit(&self, dst: *mut T)
clone_to_uninit
)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>
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>
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>
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: Unable to compute type layout, possibly due to this type having generic parameters. Layout can only be computed for concrete, fully-instantiated types.