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.

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§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!

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

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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.

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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!

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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!

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

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

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

Trait Implementations§

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

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

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl<'tcx, Prov: Debug + Provenance> Debug for MPlaceTy<'tcx, Prov>

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

Formats the value using the given formatter. Read more
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impl<'tcx, Prov: Provenance> Deref for MPlaceTy<'tcx, Prov>

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type Target = MemPlace<Prov>

The resulting type after dereferencing.
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fn deref(&self) -> &MemPlace<Prov>

Dereferences the value.
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impl<'tcx, Prov: Provenance> From<&MPlaceTy<'tcx, Prov>> for OpTy<'tcx, Prov>

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

Converts to this type from the input type.
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impl<'tcx, Prov: Provenance> From<&MPlaceTy<'tcx, Prov>> for PlaceTy<'tcx, Prov>

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

Converts to this type from the input type.
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impl<'tcx, Prov: Provenance> From<&mut MPlaceTy<'tcx, Prov>> for OpTy<'tcx, Prov>

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

Converts to this type from the input type.
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impl<'tcx, Prov: Provenance> From<&mut MPlaceTy<'tcx, Prov>> for PlaceTy<'tcx, Prov>

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

Converts to this type from the input type.
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impl<'tcx, Prov: Provenance> From<MPlaceTy<'tcx, Prov>> for OpTy<'tcx, Prov>

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

Converts to this type from the input type.
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impl<'tcx, Prov: Provenance> From<MPlaceTy<'tcx, Prov>> for PlaceTy<'tcx, Prov>

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

Converts to this type from the input type.
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impl<'tcx, Prov: Hash + Provenance> Hash for MPlaceTy<'tcx, Prov>

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

Feeds this value into the given Hasher. Read more
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fn hash_slice<H>(data: &[Self], state: &mut H)where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher. Read more
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impl<'tcx, Prov: PartialEq + Provenance> PartialEq<MPlaceTy<'tcx, Prov>> for MPlaceTy<'tcx, Prov>

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

This method tests for self and other values to be equal, and is used by ==.
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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.
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impl<'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> Value<'mir, 'tcx, M> for MPlaceTy<'tcx, M::Provenance>

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

Gets this value’s layout.
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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.
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fn from_op(op: &OpTy<'tcx, M::Provenance>) -> Self

Creates this from an OpTy. Read more
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fn project_downcast( &self, ecx: &InterpCx<'mir, 'tcx, M>, variant: VariantIdx ) -> InterpResult<'tcx, Self>

Projects to the given enum variant.
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fn project_field( &self, ecx: &InterpCx<'mir, 'tcx, M>, field: usize ) -> InterpResult<'tcx, Self>

Projects to the n-th field.
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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.
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impl<'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> ValueMut<'mir, 'tcx, M> for MPlaceTy<'tcx, M::Provenance>

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

Gets this value’s layout.
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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.
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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.
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fn from_op(op: &OpTy<'tcx, M::Provenance>) -> Self

Creates this from an OpTy. Read more
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fn project_downcast( &self, ecx: &mut InterpCx<'mir, 'tcx, M>, variant: VariantIdx ) -> InterpResult<'tcx, Self>

Projects to the given enum variant.
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fn project_field( &self, ecx: &mut InterpCx<'mir, 'tcx, M>, field: usize ) -> InterpResult<'tcx, Self>

Projects to the n-th field.
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impl<'tcx, Prov: Copy + Provenance> Copy for MPlaceTy<'tcx, Prov>

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

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

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

Auto Trait Implementations§

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impl<'tcx, Prov = AllocId> !RefUnwindSafe for MPlaceTy<'tcx, Prov>

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impl<'tcx, Prov = AllocId> !Send for MPlaceTy<'tcx, Prov>

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impl<'tcx, Prov = AllocId> !Sync for MPlaceTy<'tcx, Prov>

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impl<'tcx, Prov> Unpin for MPlaceTy<'tcx, Prov>where Prov: Unpin,

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impl<'tcx, Prov = AllocId> !UnwindSafe for MPlaceTy<'tcx, Prov>

Blanket Implementations§

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impl<T> Any for Twhere T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for Twhere T: ?Sized,

const: unstable · source§

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for Twhere T: ?Sized,

const: unstable · source§

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

const: unstable · source§

fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for Twhere U: From<T>,

const: unstable · source§

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> ToOwned for Twhere T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for Twhere U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
const: unstable · source§

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for Twhere U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
const: unstable · source§

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.

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.