Struct PlaceTy

pub struct PlaceTy<'tcx, Prov: Provenance = CtfeProvenance> {
    place: Place<Prov>,
    pub layout: TyAndLayout<'tcx>,
}

An evaluated place, together with its type.

This may reference a stack frame by its index, so PlaceTy should generally not be kept around for longer than a single operation. Popping and then pushing a stack frame can make PlaceTy point to the wrong destination. If the interpreter has multiple stacks, stack switching will also invalidate a PlaceTy.

Fields

place: Place<Prov>

layout: TyAndLayout<'tcx>

Implementations

impl<'tcx, Prov: Provenance> PlaceTy<'tcx, Prov>

pub(super) fn place(&self) -> &Place<Prov>

pub fn as_mplace_or_local( &self, ) -> Either<MPlaceTy<'tcx, Prov>, (Local, Option<Size>, usize, TyAndLayout<'tcx>)>

A place is either an mplace or some local.

pub fn assert_mem_place(&self) -> MPlaceTy<'tcx, Prov>

Trait Implementations

impl<'tcx, Prov: Clone + Provenance> Clone for PlaceTy<'tcx, Prov>

fn clone(&self) -> PlaceTy<'tcx, Prov>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<Prov: Provenance> Debug for PlaceTy<'_, Prov>

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

Formats the value using the given formatter.

impl<'tcx, Prov: Provenance> From<MPlaceTy<'tcx, Prov>> for PlaceTy<'tcx, Prov>

fn from(mplace: MPlaceTy<'tcx, Prov>) -> Self

Converts to this type from the input type.

impl<'tcx, Prov: Provenance> Projectable<'tcx, Prov> for PlaceTy<'tcx, Prov>

fn layout(&self) -> TyAndLayout<'tcx>

Get the layout.

fn meta(&self) -> MemPlaceMeta<Prov>

Get the metadata of a wide value.

fn offset_with_meta<M: Machine<'tcx, Provenance = Prov>>( &self, offset: Size, mode: OffsetMode, meta: MemPlaceMeta<Prov>, layout: TyAndLayout<'tcx>, ecx: &InterpCx<'tcx, M>, ) -> InterpResult<'tcx, Self>

Offset the value by the given amount, replacing the layout and metadata.

fn to_op<M: Machine<'tcx, Provenance = Prov>>( &self, ecx: &InterpCx<'tcx, M>, ) -> InterpResult<'tcx, OpTy<'tcx, M::Provenance>>

Convert this to an OpTy. This might be an irreversible transformation, but is useful for reading from this thing.

fn len<M: Machine<'tcx, Provenance = Prov>>( &self, ecx: &InterpCx<'tcx, M>, ) -> InterpResult<'tcx, u64>

Get the length of a slice/string/array stored here.

fn offset<M: Machine<'tcx, Provenance = Prov>>( &self, offset: Size, layout: TyAndLayout<'tcx>, ecx: &InterpCx<'tcx, M>, ) -> InterpResult<'tcx, Self>

fn transmute<M: Machine<'tcx, Provenance = Prov>>( &self, layout: TyAndLayout<'tcx>, ecx: &InterpCx<'tcx, M>, ) -> InterpResult<'tcx, Self>

This does an offset-by-zero, which is effectively a transmute. Note however that not all transmutes are supported by all projectables – specifically, if this is an OpTy or ImmTy, the new layout must have almost the same ABI as the old one (only changing the valid_range is allowed and turning integers into pointers).

impl<'tcx, Prov: Provenance> Writeable<'tcx, Prov> for PlaceTy<'tcx, Prov>

fn to_place(&self) -> PlaceTy<'tcx, Prov>

fn force_mplace<M: Machine<'tcx, Provenance = Prov>>( &self, ecx: &mut InterpCx<'tcx, M>, ) -> InterpResult<'tcx, MPlaceTy<'tcx, Prov>>

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.