Struct rustc_const_eval::interpret::MPlaceTy

pub struct MPlaceTy<'tcx, Prov: Provenance = AllocId> {
    mplace: MemPlace<Prov>,
    pub layout: TyAndLayout<'tcx>,
    pub align: Align,
}

A MemPlace with its layout. Constructing it is only possible in this module.

Fields

mplace: MemPlace<Prov>

layout: TyAndLayout<'tcx>

align: Align

rustc does not have a proper way to represent the type of a field of a repr(packed) struct: it needs to have a different alignment than the field type would usually have. So we represent this here with a separate field that “overwrites” layout.align. This means layout.align should never be used for a MPlaceTy!

Implementations

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

pub fn fake_alloc_zst(layout: TyAndLayout<'tcx>) -> Self

Produces a MemPlace that works for ZST but nothing else. Conceptually this is a new allocation, but it doesn’t actually create an allocation so you don’t need to worry about memory leaks.

pub fn from_aligned_ptr( ptr: Pointer<Option<Prov>>, layout: TyAndLayout<'tcx> ) -> Self

pub fn from_aligned_ptr_with_meta( ptr: Pointer<Option<Prov>>, layout: TyAndLayout<'tcx>, meta: MemPlaceMeta<Prov> ) -> Self

pub fn map_provenance( self, f: impl FnOnce(Option<Prov>) -> Option<Prov> ) -> Self

Adjust the provenance of the main pointer (metadata is unaffected).

pub(super) fn mplace(&self) -> &MemPlace<Prov>

pub fn ptr(&self) -> Pointer<Option<Prov>>

pub fn to_ref(&self, cx: &impl HasDataLayout) -> Immediate<Prov>

Trait Implementations

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

fn clone(&self) -> MPlaceTy<'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 MPlaceTy<'_, Prov>

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

Formats the value using the given formatter.

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

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

Converts to this type from the input type.

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: Hash + Provenance> Hash for MPlaceTy<'tcx, Prov>

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl<'tcx, Prov: PartialEq + Provenance> PartialEq<MPlaceTy<'tcx, Prov>> for MPlaceTy<'tcx, Prov>

fn eq(&self, other: &MPlaceTy<'tcx, Prov>) -> bool

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

fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<'tcx, Prov: Provenance> Projectable<'tcx, Prov> for MPlaceTy<'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<'mir, M: Machine<'mir, 'tcx, Provenance = Prov>>( &self, offset: Size, meta: MemPlaceMeta<Prov>, layout: TyAndLayout<'tcx>, ecx: &InterpCx<'mir, 'tcx, M> ) -> InterpResult<'tcx, Self>

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

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

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

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

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

impl<'tcx, Prov: Provenance> Readable<'tcx, Prov> for MPlaceTy<'tcx, Prov>

fn as_mplace_or_imm(&self) -> Either<MPlaceTy<'tcx, Prov>, ImmTy<'tcx, Prov>>

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

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

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

impl<'tcx, Prov: Eq + Provenance> Eq for MPlaceTy<'tcx, Prov>

impl<'tcx, Prov: Provenance> StructuralEq for MPlaceTy<'tcx, Prov>

impl<'tcx, Prov: Provenance> StructuralPartialEq for 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.