rustc_trait_selection::solve

Struct EvalCtxt

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pub struct EvalCtxt<'a, D, I = I>
where
    D: SolverDelegate<Interner = I>,
    I: Interner,
{
    delegate: &'a D,
    variables: <I as Interner>::CanonicalVars,
    current_goal_kind: CurrentGoalKind,
    pub(super) var_values: CanonicalVarValues<I>,
    predefined_opaques_in_body: <I as Interner>::PredefinedOpaques,
    pub(super) max_input_universe: UniverseIndex,
    pub(super) search_graph: &'a mut SearchGraph<SearchGraphDelegate<D>, I>,
    nested_goals: NestedGoals<I>,
    pub(super) origin_span: <I as Interner>::Span,
    tainted: Result<(), NoSolution>,
    pub(super) inspect: ProofTreeBuilder<D, I>,
}

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§delegate: &'a D§variables: <I as Interner>::CanonicalVars§current_goal_kind: CurrentGoalKind§var_values: CanonicalVarValues<I>§predefined_opaques_in_body: <I as Interner>::PredefinedOpaques§max_input_universe: UniverseIndex§search_graph: &'a mut SearchGraph<SearchGraphDelegate<D>, I>§nested_goals: NestedGoals<I>§origin_span: <I as Interner>::Span§tainted: Result<(), NoSolution>§inspect: ProofTreeBuilder<D, I>

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impl<D, I> EvalCtxt<'_, D, I>
where D: SolverDelegate<Interner = I>, I: Interner,

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pub fn instantiate_normalizes_to_term( &mut self, goal: Goal<I, NormalizesTo<I>>, term: <I as Interner>::Term, )

When normalizing an associated item, constrain the expected term to term.

We know term to always be a fully unconstrained inference variable, so eq should never fail here. However, in case term contains aliases, we emit nested AliasRelate goals to structurally normalize the alias.

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pub fn structurally_instantiate_normalizes_to_term( &mut self, goal: Goal<I, NormalizesTo<I>>, term: AliasTerm<I>, )

Unlike instantiate_normalizes_to_term this instantiates the expected term with a rigid alias. Using this is pretty much always wrong.

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impl<'a, D, I> DynSend for EvalCtxt<'a, D, I>
where <I as Interner>::CanonicalVars: DynSend, <I as Interner>::PredefinedOpaques: DynSend, <I as Interner>::Span: DynSend, D: DynSync + DynSend, <I as Interner>::GenericArgs: DynSend, <I as Interner>::ParamEnv: DynSend, <I as Interner>::Term: DynSend, <I as Interner>::Predicate: DynSend, <I as Interner>::DefiningOpaqueTypes: DynSend, <I as Interner>::DefId: DynSend, <I as Interner>::GenericArg: DynSend, <I as Interner>::ExternalConstraints: DynSend,

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impl<'a, D, I> DynSync for EvalCtxt<'a, D, I>
where <I as Interner>::CanonicalVars: DynSync, <I as Interner>::PredefinedOpaques: DynSync, <I as Interner>::Span: DynSync, D: DynSync, <I as Interner>::GenericArgs: DynSync, <I as Interner>::ParamEnv: DynSync, <I as Interner>::Term: DynSync, <I as Interner>::Predicate: DynSync, <I as Interner>::DefiningOpaqueTypes: DynSync, <I as Interner>::DefId: DynSync, <I as Interner>::GenericArg: DynSync, <I as Interner>::ExternalConstraints: DynSync,

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impl<'a, D, I> Freeze for EvalCtxt<'a, D, I>
where <I as Interner>::CanonicalVars: Freeze, <I as Interner>::PredefinedOpaques: Freeze, <I as Interner>::Span: Freeze, <I as Interner>::GenericArgs: Freeze,

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impl<'a, D, I> RefUnwindSafe for EvalCtxt<'a, D, I>
where <I as Interner>::CanonicalVars: RefUnwindSafe, <I as Interner>::PredefinedOpaques: RefUnwindSafe, <I as Interner>::Span: RefUnwindSafe, D: RefUnwindSafe, <I as Interner>::GenericArgs: RefUnwindSafe, <I as Interner>::ParamEnv: RefUnwindSafe, <I as Interner>::Term: RefUnwindSafe, <I as Interner>::Predicate: RefUnwindSafe, <I as Interner>::DefId: RefUnwindSafe, <I as Interner>::DefiningOpaqueTypes: RefUnwindSafe, <I as Interner>::GenericArg: RefUnwindSafe, <I as Interner>::ExternalConstraints: RefUnwindSafe,

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impl<'a, D, I> Send for EvalCtxt<'a, D, I>
where <I as Interner>::CanonicalVars: Send, <I as Interner>::PredefinedOpaques: Send, <I as Interner>::Span: Send, D: Sync + Send, <I as Interner>::GenericArgs: Send, <I as Interner>::ParamEnv: Send, <I as Interner>::DefiningOpaqueTypes: Send, <I as Interner>::Term: Send, <I as Interner>::Predicate: Send, <I as Interner>::DefId: Send, <I as Interner>::ExternalConstraints: Send, <I as Interner>::GenericArg: Send,

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impl<'a, D, I> Sync for EvalCtxt<'a, D, I>
where <I as Interner>::CanonicalVars: Sync, <I as Interner>::PredefinedOpaques: Sync, <I as Interner>::Span: Sync, D: Sync, <I as Interner>::GenericArgs: Sync, <I as Interner>::ParamEnv: Sync, <I as Interner>::Term: Sync, <I as Interner>::Predicate: Sync, <I as Interner>::DefId: Sync, <I as Interner>::DefiningOpaqueTypes: Sync, <I as Interner>::GenericArg: Sync, <I as Interner>::ExternalConstraints: Sync,

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impl<'a, D, I> Unpin for EvalCtxt<'a, D, I>
where <I as Interner>::CanonicalVars: Unpin, <I as Interner>::PredefinedOpaques: Unpin, <I as Interner>::Span: Unpin, <I as Interner>::GenericArgs: Unpin, D: Unpin, <I as Interner>::ParamEnv: Unpin, <I as Interner>::Term: Unpin, <I as Interner>::Predicate: Unpin, <I as Interner>::DefId: Unpin,

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impl<'a, D, I = <D as SolverDelegate>::Interner> !UnwindSafe for EvalCtxt<'a, D, I>

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fn collect_and_apply<I, F>(iter: I, f: F) -> R
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Equivalent to f(&iter.collect::<Vec<_>>()).

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type Output = R

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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.