Trait rustc_trait_selection::traits::util::Elaboratable

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;
}

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

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

Object Safety

This trait is not object safe.

Implementations on Foreign Types

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

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

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

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)

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

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

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

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)

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

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

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

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

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

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

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

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

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.