ProofTreeBuilder

rustc_next_trait_solver::solve::inspect::build

Struct ProofTreeBuilder 

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pub(crate) struct ProofTreeBuilder<D, I = I>
where
    D: SolverDelegate<Interner = I>,
    I: Interner,
{
    state: Option<Box<Option<Probe<I>>>>,
    _infcx: PhantomData<D>,
}
Expand description

We need to know whether to build a prove tree while evaluating. We pass a ProofTreeBuilder with state: Some(None) into the search graph which then causes the initial EvalCtxt::compute_goal to actually build a proof tree which then gets written into the state.

Building the proof tree for a single evaluation step happens via the EvaluationStepBuilder which is updated by the EvalCtxt when appropriate.

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§state: Option<Box<Option<Probe<I>>>>§_infcx: PhantomData<D>

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impl<D: SolverDelegate<Interner = I>, I: Interner> ProofTreeBuilder<D>

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pub(crate) fn new() -> ProofTreeBuilder<D>

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pub(crate) fn new_noop() -> ProofTreeBuilder<D>

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pub(crate) fn is_noop(&self) -> bool

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pub(crate) fn new_evaluation_step( &mut self, var_values: CanonicalVarValues<I>, ) -> EvaluationStepBuilder<D>

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pub(crate) fn finish_evaluation_step( &mut self, goal_evaluation_step: EvaluationStepBuilder<D>, )

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pub(crate) fn unwrap(self) -> Probe<I>

Auto Trait Implementations§

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impl<D, I> DynSend for ProofTreeBuilder<D, I>
where D: DynSend, <I as Interner>::CanonicalVarKinds: DynSend, <I as Interner>::ImplId: DynSend, <I as Interner>::GenericArgs: DynSend, <I as Interner>::ExternalConstraints: DynSend, <I as Interner>::ParamEnv: DynSend, <I as Interner>::Predicate: DynSend,

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impl<D, I> DynSync for ProofTreeBuilder<D, I>
where D: DynSync, <I as Interner>::CanonicalVarKinds: DynSync, <I as Interner>::ImplId: DynSync, <I as Interner>::GenericArgs: DynSync, <I as Interner>::ExternalConstraints: DynSync, <I as Interner>::ParamEnv: DynSync, <I as Interner>::Predicate: DynSync,

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impl<D, I> Freeze for ProofTreeBuilder<D, I>

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impl<D, I> RefUnwindSafe for ProofTreeBuilder<D, I>
where D: RefUnwindSafe, <I as Interner>::CanonicalVarKinds: RefUnwindSafe, <I as Interner>::ImplId: RefUnwindSafe, <I as Interner>::GenericArgs: RefUnwindSafe, <I as Interner>::ExternalConstraints: RefUnwindSafe, <I as Interner>::ParamEnv: RefUnwindSafe, <I as Interner>::Predicate: RefUnwindSafe,

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impl<D, I> Send for ProofTreeBuilder<D, I>
where D: Send, <I as Interner>::CanonicalVarKinds: Send, <I as Interner>::ImplId: Send, <I as Interner>::GenericArgs: Send, <I as Interner>::ExternalConstraints: Send, <I as Interner>::ParamEnv: Send, <I as Interner>::Predicate: Send,

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impl<D, I> Sync for ProofTreeBuilder<D, I>
where D: Sync, <I as Interner>::CanonicalVarKinds: Sync, <I as Interner>::ImplId: Sync, <I as Interner>::GenericArgs: Sync, <I as Interner>::ExternalConstraints: Sync, <I as Interner>::ParamEnv: Sync, <I as Interner>::Predicate: Sync,

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impl<D, I> Unpin for ProofTreeBuilder<D, I>
where D: Unpin,

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impl<D, I> UnwindSafe for ProofTreeBuilder<D, I>
where D: UnwindSafe, <I as Interner>::CanonicalVarKinds: UnwindSafe, <I as Interner>::ImplId: UnwindSafe, <I as Interner>::GenericArgs: UnwindSafe, <I as Interner>::ExternalConstraints: UnwindSafe, <I as Interner>::ParamEnv: UnwindSafe, <I as Interner>::Predicate: UnwindSafe,

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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: 8 bytes