Struct rustc_const_eval::interpret::place::MPlaceTy
source · pub struct MPlaceTy<'tcx, Prov: Provenance = AllocId> {
mplace: MemPlace<Prov>,
pub layout: TyAndLayout<'tcx>,
pub align: Align,
}
Expand description
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§
source§impl<'tcx, Prov: Provenance> MPlaceTy<'tcx, Prov>
impl<'tcx, Prov: Provenance> MPlaceTy<'tcx, Prov>
sourcepub fn fake_alloc_zst(layout: TyAndLayout<'tcx>) -> Self
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.
sourcepub(crate) fn offset_with_meta(
&self,
offset: Size,
meta: MemPlaceMeta<Prov>,
layout: TyAndLayout<'tcx>,
cx: &impl HasDataLayout
) -> InterpResult<'tcx, Self>
pub(crate) fn offset_with_meta( &self, offset: Size, meta: MemPlaceMeta<Prov>, layout: TyAndLayout<'tcx>, cx: &impl HasDataLayout ) -> InterpResult<'tcx, Self>
Offset the place in memory and change its metadata.
This can go wrong very easily if you give the wrong layout for the new place!
sourcepub fn offset(
&self,
offset: Size,
layout: TyAndLayout<'tcx>,
cx: &impl HasDataLayout
) -> InterpResult<'tcx, Self>
pub fn offset( &self, offset: Size, layout: TyAndLayout<'tcx>, cx: &impl HasDataLayout ) -> InterpResult<'tcx, Self>
Offset the place in memory.
This can go wrong very easily if you give the wrong layout for the new place!
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(crate) fn len(&self, cx: &impl HasDataLayout) -> InterpResult<'tcx, u64>
Trait Implementations§
source§impl<'tcx, Prov: Provenance> Deref for MPlaceTy<'tcx, Prov>
impl<'tcx, Prov: Provenance> Deref for MPlaceTy<'tcx, Prov>
source§impl<'tcx, Prov: PartialEq + Provenance> PartialEq<MPlaceTy<'tcx, Prov>> for MPlaceTy<'tcx, Prov>
impl<'tcx, Prov: PartialEq + Provenance> PartialEq<MPlaceTy<'tcx, Prov>> for MPlaceTy<'tcx, Prov>
source§impl<'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> Value<'mir, 'tcx, M> for MPlaceTy<'tcx, M::Provenance>
impl<'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> Value<'mir, 'tcx, M> for MPlaceTy<'tcx, M::Provenance>
source§fn layout(&self) -> TyAndLayout<'tcx>
fn layout(&self) -> TyAndLayout<'tcx>
source§fn to_op_for_read(
&self,
_ecx: &InterpCx<'mir, 'tcx, M>
) -> InterpResult<'tcx, OpTy<'tcx, M::Provenance>>
fn to_op_for_read( &self, _ecx: &InterpCx<'mir, 'tcx, M> ) -> InterpResult<'tcx, OpTy<'tcx, M::Provenance>>
OpTy
, in a cheap way that is good for reading.source§fn project_downcast(
&self,
ecx: &InterpCx<'mir, 'tcx, M>,
variant: VariantIdx
) -> InterpResult<'tcx, Self>
fn project_downcast( &self, ecx: &InterpCx<'mir, 'tcx, M>, variant: VariantIdx ) -> InterpResult<'tcx, Self>
source§fn project_field(
&self,
ecx: &InterpCx<'mir, 'tcx, M>,
field: usize
) -> InterpResult<'tcx, Self>
fn project_field( &self, ecx: &InterpCx<'mir, 'tcx, M>, field: usize ) -> InterpResult<'tcx, Self>
source§fn to_op_for_proj(
&self,
ecx: &InterpCx<'mir, 'tcx, M>
) -> InterpResult<'tcx, OpTy<'tcx, M::Provenance>>
fn to_op_for_proj( &self, ecx: &InterpCx<'mir, 'tcx, M> ) -> InterpResult<'tcx, OpTy<'tcx, M::Provenance>>
OpTy
, in a potentially more expensive way that is good for projections.source§impl<'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> ValueMut<'mir, 'tcx, M> for MPlaceTy<'tcx, M::Provenance>
impl<'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> ValueMut<'mir, 'tcx, M> for MPlaceTy<'tcx, M::Provenance>
source§fn layout(&self) -> TyAndLayout<'tcx>
fn layout(&self) -> TyAndLayout<'tcx>
source§fn to_op_for_read(
&self,
_ecx: &InterpCx<'mir, 'tcx, M>
) -> InterpResult<'tcx, OpTy<'tcx, M::Provenance>>
fn to_op_for_read( &self, _ecx: &InterpCx<'mir, 'tcx, M> ) -> InterpResult<'tcx, OpTy<'tcx, M::Provenance>>
OpTy
, in a cheap way that is good for reading.source§fn to_op_for_proj(
&self,
_ecx: &mut InterpCx<'mir, 'tcx, M>
) -> InterpResult<'tcx, OpTy<'tcx, M::Provenance>>
fn to_op_for_proj( &self, _ecx: &mut InterpCx<'mir, 'tcx, M> ) -> InterpResult<'tcx, OpTy<'tcx, M::Provenance>>
OpTy
, in a potentially more expensive way that is good for projections.source§fn project_downcast(
&self,
ecx: &mut InterpCx<'mir, 'tcx, M>,
variant: VariantIdx
) -> InterpResult<'tcx, Self>
fn project_downcast( &self, ecx: &mut InterpCx<'mir, 'tcx, M>, variant: VariantIdx ) -> InterpResult<'tcx, Self>
source§fn project_field(
&self,
ecx: &mut InterpCx<'mir, 'tcx, M>,
field: usize
) -> InterpResult<'tcx, Self>
fn project_field( &self, ecx: &mut InterpCx<'mir, 'tcx, M>, field: usize ) -> InterpResult<'tcx, Self>
impl<'tcx, Prov: Copy + Provenance> Copy for 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>
Auto Trait Implementations§
impl<'tcx, Prov = AllocId> !RefUnwindSafe for MPlaceTy<'tcx, Prov>
impl<'tcx, Prov = AllocId> !Send for MPlaceTy<'tcx, Prov>
impl<'tcx, Prov = AllocId> !Sync for MPlaceTy<'tcx, Prov>
impl<'tcx, Prov> Unpin for MPlaceTy<'tcx, Prov>where Prov: Unpin,
impl<'tcx, Prov = AllocId> !UnwindSafe for MPlaceTy<'tcx, Prov>
Blanket Implementations§
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.