Struct rustc_const_eval::interpret::MPlaceTy

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

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

Fields

mplace: MemPlace<Tag>

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, Tag: Provenance> MPlaceTy<'tcx, Tag>

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

Produces a MemPlace that works for ZST but nothing else

pub fn offset(
    &self,
    offset: Size,
    meta: MemPlaceMeta<Tag>,
    layout: TyAndLayout<'tcx>,
    cx: &impl HasDataLayout
) -> InterpResult<'tcx, Self>

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

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

pub(crate) fn len(&self, cx: &impl HasDataLayout) -> InterpResult<'tcx, u64>

pub(super) fn vtable(&self) -> Scalar<Tag>

Trait Implementations

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

fn clone(&self) -> MPlaceTy<'tcx, Tag>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<'tcx, Tag: Debug + Provenance> Debug for MPlaceTy<'tcx, Tag>

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

Formats the value using the given formatter.

impl<'tcx, Tag: Provenance> Deref for MPlaceTy<'tcx, Tag>

type Target = MemPlace<Tag>

The resulting type after dereferencing.

fn deref(&self) -> &MemPlace<Tag>

Dereferences the value.

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

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

Converts to this type from the input type.

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

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

Converts to this type from the input type.

impl<'tcx, Tag: Provenance> From<&mut MPlaceTy<'tcx, Tag>> for OpTy<'tcx, Tag>

fn from(mplace: &mut MPlaceTy<'tcx, Tag>) -> Self

Converts to this type from the input type.

impl<'tcx, Tag: Provenance> From<&mut MPlaceTy<'tcx, Tag>> for PlaceTy<'tcx, Tag>

fn from(mplace: &mut MPlaceTy<'tcx, Tag>) -> Self

Converts to this type from the input type.

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

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

Converts to this type from the input type.

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

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

Converts to this type from the input type.

impl<'tcx, Tag: Hash + Provenance> Hash for MPlaceTy<'tcx, Tag>

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, 

Feeds a slice of this type into the given Hasher.

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

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

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

fn ne(&self, other: &MPlaceTy<'tcx, Tag>) -> bool

This method tests for !=.

impl<'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> Value<'mir, 'tcx, M> for MPlaceTy<'tcx, M::PointerTag>

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

Gets this value’s layout.

fn to_op(
    &self,
    _ecx: &InterpCx<'mir, 'tcx, M>
) -> InterpResult<'tcx, OpTy<'tcx, M::PointerTag>>

Makes this into an OpTy.

fn from_mem_place(mplace: MPlaceTy<'tcx, M::PointerTag>) -> Self

Creates this from an MPlaceTy.

fn project_downcast(
    &self,
    ecx: &InterpCx<'mir, 'tcx, M>,
    variant: VariantIdx
) -> InterpResult<'tcx, Self>

Projects to the given enum variant.

fn project_field(
    &self,
    ecx: &InterpCx<'mir, 'tcx, M>,
    field: usize
) -> InterpResult<'tcx, Self>

Projects to the n-th field.

impl<'tcx, Tag: Copy + Provenance> Copy for MPlaceTy<'tcx, Tag>

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

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

impl<'tcx, Tag: Provenance> StructuralPartialEq for MPlaceTy<'tcx, Tag>

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.