Trait rustc_trait_selection::traits::util::Elaboratable

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pub trait Elaboratable<I>
where I: Interner,
{ // Required methods fn predicate(&self) -> <I as Interner>::Predicate; fn child(&self, clause: <I as Interner>::Clause) -> Self; fn child_with_derived_cause( &self, clause: <I as Interner>::Clause, span: <I as Interner>::Span, parent_trait_pred: Binder<I, TraitPredicate<I>>, index: usize, ) -> Self; }
Expand description

Describes how to elaborate an obligation into a sub-obligation.

Required Methods§

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fn predicate(&self) -> <I as Interner>::Predicate

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fn child(&self, clause: <I as Interner>::Clause) -> Self

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fn child_with_derived_cause( &self, clause: <I as Interner>::Clause, span: <I as Interner>::Span, parent_trait_pred: Binder<I, TraitPredicate<I>>, index: usize, ) -> Self

Object Safety§

This trait is not object safe.

Implementations on Foreign Types§

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impl<'tcx> Elaboratable<TyCtxt<'tcx>> for (Clause<'tcx>, Span)

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fn predicate(&self) -> Predicate<'tcx>

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fn child(&self, clause: Clause<'tcx>) -> (Clause<'tcx>, Span)

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fn child_with_derived_cause( &self, clause: Clause<'tcx>, _span: Span, _parent_trait_pred: Binder<TyCtxt<'tcx>, TraitPredicate<TyCtxt<'tcx>>>, _index: usize, ) -> (Clause<'tcx>, Span)

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impl<'tcx> Elaboratable<TyCtxt<'tcx>> for (Predicate<'tcx>, Span)

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fn predicate(&self) -> Predicate<'tcx>

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fn child(&self, clause: Clause<'tcx>) -> (Predicate<'tcx>, Span)

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fn child_with_derived_cause( &self, clause: Clause<'tcx>, _span: Span, _parent_trait_pred: Binder<TyCtxt<'tcx>, TraitPredicate<TyCtxt<'tcx>>>, _index: usize, ) -> (Predicate<'tcx>, Span)

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impl<'tcx> Elaboratable<TyCtxt<'tcx>> for Clause<'tcx>

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fn predicate(&self) -> Predicate<'tcx>

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fn child(&self, clause: Clause<'tcx>) -> Clause<'tcx>

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fn child_with_derived_cause( &self, clause: Clause<'tcx>, _span: Span, _parent_trait_pred: Binder<TyCtxt<'tcx>, TraitPredicate<TyCtxt<'tcx>>>, _index: usize, ) -> Clause<'tcx>

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impl<'tcx> Elaboratable<TyCtxt<'tcx>> for Predicate<'tcx>

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fn predicate(&self) -> Predicate<'tcx>

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fn child(&self, clause: Clause<'tcx>) -> Predicate<'tcx>

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fn child_with_derived_cause( &self, clause: Clause<'tcx>, _span: Span, _parent_trait_pred: Binder<TyCtxt<'tcx>, TraitPredicate<TyCtxt<'tcx>>>, _index: usize, ) -> Predicate<'tcx>

Implementors§

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impl<'tcx> Elaboratable<TyCtxt<'tcx>> for Obligation<'tcx, Predicate<'tcx>>

For Obligation, a sub-obligation is combined with the current obligation’s param-env and cause code.