Struct rustc_const_eval::interpret::OpTy

pub struct OpTy<'tcx, Prov: Provenance = AllocId> {
    op: Operand<Prov>,
    pub layout: TyAndLayout<'tcx>,
    pub align: Option<Align>,
}

Fields

op: Operand<Prov>

layout: TyAndLayout<'tcx>

align: Option<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 an OpTy! None means “alignment does not matter since this is a by-value operand” (Operand::Immediate); this field is only relevant for Operand::Indirect. Also CTFE ignores alignment anyway, so this is for Miri only.

Implementations

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

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

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

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

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

pub fn try_as_mplace(&self) -> Result<MPlaceTy<'tcx, Prov>, ImmTy<'tcx, Prov>>

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

Trait Implementations

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

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

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<'tcx, Prov: Debug + Provenance> Debug for OpTy<'tcx, Prov>

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

Formats the value using the given formatter.

impl<'tcx, Prov: Provenance> Deref for OpTy<'tcx, Prov>

type Target = Operand<Prov>

The resulting type after dereferencing.

fn deref(&self) -> &Operand<Prov>

Dereferences the value.

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<&mut MPlaceTy<'tcx, Prov>> for OpTy<'tcx, Prov>

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

Converts to this type from the input type.

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

fn from(val: ImmTy<'tcx, Prov>) -> Self

Converts to this type from the input type.

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<'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> Value<'mir, 'tcx, M> for OpTy<'tcx, M::Provenance>

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

Gets this value’s layout.

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

Makes this into an OpTy, in a cheap way that is good for reading.

fn from_op(op: &OpTy<'tcx, M::Provenance>) -> Self

Creates this from an OpTy.

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.

fn to_op_for_proj(
    &self,
    ecx: &InterpCx<'mir, 'tcx, M>
) -> InterpResult<'tcx, OpTy<'tcx, M::Provenance>>

Makes this into an OpTy, in a potentially more expensive way that is good for projections.

impl<'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> ValueMut<'mir, 'tcx, M> for OpTy<'tcx, M::Provenance>

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

Gets this value’s layout.

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

Makes this into an OpTy, in a cheap way that is good for reading.

fn to_op_for_proj(
    &self,
    _ecx: &mut InterpCx<'mir, 'tcx, M>
) -> InterpResult<'tcx, OpTy<'tcx, M::Provenance>>

Makes this into an OpTy, in a potentially more expensive way that is good for projections.

fn from_op(op: &OpTy<'tcx, M::Provenance>) -> Self

Creates this from an OpTy.

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

Projects to the given enum variant.

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

Projects to the n-th field.

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.