Struct rustc_const_eval::interpret::Frame
source · [−]pub struct Frame<'mir, 'tcx, Prov: Provenance = AllocId, Extra = ()> {
pub body: &'mir Body<'tcx>,
pub instance: Instance<'tcx>,
pub extra: Extra,
pub return_to_block: StackPopCleanup,
pub return_place: PlaceTy<'tcx, Prov>,
pub locals: IndexVec<Local, LocalState<'tcx, Prov>>,
tracing_span: SpanGuard,
pub loc: Result<Location, Span>,
}Expand description
A stack frame.
Fields
body: &'mir Body<'tcx>The MIR for the function called on this frame.
instance: Instance<'tcx>The def_id and substs of the current function.
extra: ExtraExtra data for the machine.
return_to_block: StackPopCleanupWork to perform when returning from this function.
return_place: PlaceTy<'tcx, Prov>The location where the result of the current stack frame should be written to, and its layout in the caller.
locals: IndexVec<Local, LocalState<'tcx, Prov>>The list of locals for this stack frame, stored in order as
[return_ptr, arguments..., variables..., temporaries...].
The locals are stored as Option<Value>s.
None represents a local that is currently dead, while a live local
can either directly contain Scalar or refer to some part of an Allocation.
Do not access this directly; always go through the machine hook!
tracing_span: SpanGuardThe span of the tracing crate is stored here.
When the guard is dropped, the span is exited. This gives us
a full stack trace on all tracing statements.
loc: Result<Location, Span>If this is Err, we are not currently executing any particular statement in
this frame (can happen e.g. during frame initialization, and during unwinding on
frames without cleanup code).
We basically abuse Result as Either.
Needs to be public because ConstProp does unspeakable things to it.
Implementations
sourceimpl<'mir, 'tcx, Prov: Provenance> Frame<'mir, 'tcx, Prov>
impl<'mir, 'tcx, Prov: Provenance> Frame<'mir, 'tcx, Prov>
pub fn with_extra<Extra>(self, extra: Extra) -> Frame<'mir, 'tcx, Prov, Extra>
sourceimpl<'mir, 'tcx, Prov: Provenance, Extra> Frame<'mir, 'tcx, Prov, Extra>
impl<'mir, 'tcx, Prov: Provenance, Extra> Frame<'mir, 'tcx, Prov, Extra>
sourcepub fn current_loc(&self) -> Result<Location, Span>
pub fn current_loc(&self) -> Result<Location, Span>
Get the current location within the Frame.
If this is Err, we are not currently executing any particular statement in
this frame (can happen e.g. during frame initialization, and during unwinding on
frames without cleanup code).
We basically abuse Result as Either.
Used by priroda.
sourcepub fn current_source_info(&self) -> Option<&SourceInfo>
pub fn current_source_info(&self) -> Option<&SourceInfo>
Return the SourceInfo of the current instruction.
pub fn current_span(&self) -> Span
Auto Trait Implementations
impl<'mir, 'tcx, Prov = AllocId, Extra = ()> !RefUnwindSafe for Frame<'mir, 'tcx, Prov, Extra>
impl<'mir, 'tcx, Prov = AllocId, Extra = ()> !Send for Frame<'mir, 'tcx, Prov, Extra>
impl<'mir, 'tcx, Prov = AllocId, Extra = ()> !Sync for Frame<'mir, 'tcx, Prov, Extra>
impl<'mir, 'tcx, Prov, Extra> Unpin for Frame<'mir, 'tcx, Prov, Extra>where
Extra: Unpin,
Prov: Unpin,
'tcx: 'mir,
impl<'mir, 'tcx, Prov = AllocId, Extra = ()> !UnwindSafe for Frame<'mir, 'tcx, Prov, Extra>
Blanket Implementations
sourceimpl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
const: unstable · sourcefn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
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.