Struct rustc_const_eval::transform::check_consts::qualifs::NeedsDrop
source · pub struct NeedsDrop;
Expand description
Constant containing an ADT that implements Drop
.
This must be ruled out because implicit promotion would remove side-effects
that occur as part of dropping that value. N.B., the implicit promotion has
to reject const Drop implementations because even if side-effects are ruled
out through other means, the execution of the drop could diverge.
Trait Implementations§
source§impl Qualif for NeedsDrop
impl Qualif for NeedsDrop
source§const ANALYSIS_NAME: &'static str = "flow_needs_drop"
const ANALYSIS_NAME: &'static str = "flow_needs_drop"
The name of the file used to debug the dataflow analysis that computes this qualif.
source§const IS_CLEARED_ON_MOVE: bool = true
const IS_CLEARED_ON_MOVE: bool = true
Whether this
Qualif
is cleared when a local is moved from.source§fn in_qualifs(qualifs: &ConstQualifs) -> bool
fn in_qualifs(qualifs: &ConstQualifs) -> bool
Extracts the field of
ConstQualifs
that corresponds to this Qualif
.source§fn in_adt_inherently<'tcx>(
cx: &ConstCx<'_, 'tcx>,
adt: AdtDef<'tcx>,
_: GenericArgsRef<'tcx>
) -> bool
fn in_adt_inherently<'tcx>( cx: &ConstCx<'_, 'tcx>, adt: AdtDef<'tcx>, _: GenericArgsRef<'tcx> ) -> bool
source§const ALLOW_PROMOTED: bool = false
const ALLOW_PROMOTED: bool = false
Whether this
Qualif
might be evaluated after the promotion and can encounter a promoted.Auto Trait Implementations§
impl RefUnwindSafe for NeedsDrop
impl Send for NeedsDrop
impl Sync for NeedsDrop
impl Unpin for NeedsDrop
impl UnwindSafe for NeedsDrop
Blanket Implementations§
source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere T: ?Sized,
source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more
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: 0 bytes