Struct rustc_trait_selection::solve::search_graph::StackEntry

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struct StackEntry<I: Interner> {
    input: CanonicalInput<I>,
    available_depth: Limit,
    reached_depth: StackDepth,
    non_root_cycle_participant: Option<StackDepth>,
    encountered_overflow: bool,
    has_been_used: HasBeenUsed,
    provisional_result: Option<QueryResult<I>>,
}

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§input: CanonicalInput<I>§available_depth: Limit§reached_depth: StackDepth

The maximum depth reached by this stack entry, only up-to date for the top of the stack and lazily updated for the rest.

§non_root_cycle_participant: Option<StackDepth>

Whether this entry is a non-root cycle participant.

We must not move the result of non-root cycle participants to the global cache. See SearchGraph::cycle_participants for more details. We store the highest stack depth of a head of a cycle this goal is involved in. This necessary to soundly cache its provisional result.

§encountered_overflow: bool§has_been_used: HasBeenUsed§provisional_result: Option<QueryResult<I>>

Starts out as None and gets set when rerunning this goal in case we encounter a cycle.

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impl<I: Interner> Debug for StackEntry<I>

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

Formats the value using the given formatter. Read more

Auto Trait Implementations§

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impl<I> DynSend for StackEntry<I>
where <I as Interner>::DefiningOpaqueTypes: DynSend, <I as Interner>::CanonicalVars: DynSend, <I as Interner>::PredefinedOpaques: DynSend, <I as Interner>::ParamEnv: DynSend, <I as Interner>::Predicate: DynSend, <I as Interner>::ExternalConstraints: DynSend, <I as Interner>::GenericArgs: DynSend,

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impl<I> DynSync for StackEntry<I>
where <I as Interner>::DefiningOpaqueTypes: DynSync, <I as Interner>::CanonicalVars: DynSync, <I as Interner>::PredefinedOpaques: DynSync, <I as Interner>::ParamEnv: DynSync, <I as Interner>::Predicate: DynSync, <I as Interner>::ExternalConstraints: DynSync, <I as Interner>::GenericArgs: DynSync,

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impl<I> Freeze for StackEntry<I>
where <I as Interner>::DefiningOpaqueTypes: Freeze, <I as Interner>::CanonicalVars: Freeze, <I as Interner>::PredefinedOpaques: Freeze, <I as Interner>::ParamEnv: Freeze, <I as Interner>::Predicate: Freeze, <I as Interner>::ExternalConstraints: Freeze, <I as Interner>::GenericArgs: Freeze,

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impl<I> RefUnwindSafe for StackEntry<I>
where <I as Interner>::DefiningOpaqueTypes: RefUnwindSafe, <I as Interner>::CanonicalVars: RefUnwindSafe, <I as Interner>::PredefinedOpaques: RefUnwindSafe, <I as Interner>::ParamEnv: RefUnwindSafe, <I as Interner>::Predicate: RefUnwindSafe, <I as Interner>::ExternalConstraints: RefUnwindSafe, <I as Interner>::GenericArgs: RefUnwindSafe,

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impl<I> Send for StackEntry<I>
where <I as Interner>::DefiningOpaqueTypes: Send, <I as Interner>::CanonicalVars: Send, <I as Interner>::PredefinedOpaques: Send, <I as Interner>::ParamEnv: Send, <I as Interner>::Predicate: Send, <I as Interner>::ExternalConstraints: Send, <I as Interner>::GenericArgs: Send,

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impl<I> Sync for StackEntry<I>
where <I as Interner>::DefiningOpaqueTypes: Sync, <I as Interner>::CanonicalVars: Sync, <I as Interner>::PredefinedOpaques: Sync, <I as Interner>::ParamEnv: Sync, <I as Interner>::Predicate: Sync, <I as Interner>::ExternalConstraints: Sync, <I as Interner>::GenericArgs: Sync,

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impl<I> Unpin for StackEntry<I>
where <I as Interner>::DefiningOpaqueTypes: Unpin, <I as Interner>::CanonicalVars: Unpin, <I as Interner>::PredefinedOpaques: Unpin, <I as Interner>::ParamEnv: Unpin, <I as Interner>::Predicate: Unpin, <I as Interner>::ExternalConstraints: Unpin, <I as Interner>::GenericArgs: Unpin,

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impl<I> UnwindSafe for StackEntry<I>
where <I as Interner>::DefiningOpaqueTypes: UnwindSafe, <I as Interner>::CanonicalVars: UnwindSafe, <I as Interner>::PredefinedOpaques: UnwindSafe, <I as Interner>::ParamEnv: UnwindSafe, <I as Interner>::Predicate: UnwindSafe, <I as Interner>::ExternalConstraints: UnwindSafe, <I as Interner>::GenericArgs: UnwindSafe,

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Alignment of Self.
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Equivalent to f(&iter.collect::<Vec<_>>()).

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type Output = R

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fn into_query_param(self) -> P

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type Error = !

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default fn from_cycle_error( tcx: Tcx, cycle_error: &CycleError, _guar: ErrorGuaranteed ) -> T

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Note: Unable to compute type layout, possibly due to this type having generic parameters. Layout can only be computed for concrete, fully-instantiated types.