Elaboratable in rustc_trait_selection::traits::util - Rust
Description: Describes how to elaborate an obligation into a sub-obligation.

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## Elaboratable

# Trait 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

## Dyn Compatibility§

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

## 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.

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### impl<I> Elaboratable<I> for ClauseWithSupertraitSpan<I>
where I: Interner,