Struct AllocRefMut

pub struct AllocRefMut<'a, 'tcx, Prov: Provenance, Extra, Bytes: AllocBytes = Box<[u8]>> {
    alloc: &'a mut Allocation<Prov, Extra, Bytes>,
    range: AllocRange,
    tcx: TyCtxt<'tcx>,
    alloc_id: AllocId,
}

A reference to some allocation that was already bounds-checked for the given region and had the on-access machine hooks run.

Fields

alloc: &'a mut Allocation<Prov, Extra, Bytes>

range: AllocRange

tcx: TyCtxt<'tcx>

alloc_id: AllocId

Implementations

impl<'a, 'tcx, Prov: Provenance, Extra, Bytes: AllocBytes> AllocRefMut<'a, 'tcx, Prov, Extra, Bytes>

Reading and writing.

pub fn as_ref<'b>(&'b self) -> AllocRef<'b, 'tcx, Prov, Extra, Bytes>

pub fn write_scalar( &mut self, range: AllocRange, val: Scalar<Prov>, ) -> InterpResult<'tcx>

range is relative to this allocation reference, not the base of the allocation.

pub fn write_ptr_sized( &mut self, offset: Size, val: Scalar<Prov>, ) -> InterpResult<'tcx>

offset is relative to this allocation reference, not the base of the allocation.

pub fn write_uninit(&mut self, range: AllocRange) -> InterpResult<'tcx>

Mark the given sub-range (relative to this allocation reference) as uninitialized.

pub fn write_uninit_full(&mut self) -> InterpResult<'tcx>

Mark the entire referenced range as uninitialized

pub fn clear_provenance(&mut self) -> InterpResult<'tcx>

Remove all provenance in the reference range.

Layout

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.

Size: 40 bytes