Trait rustc_middle::ty::TypeSuperFoldable

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pub trait TypeSuperFoldable<I>: TypeFoldable<I>
where I: Interner,
{ // Required method fn try_super_fold_with<F>( self, folder: &mut F ) -> Result<Self, <F as FallibleTypeFolder<I>>::Error> where F: FallibleTypeFolder<I>; // Provided method fn super_fold_with<F>(self, folder: &mut F) -> Self where F: TypeFolder<I> { ... } }

Required Methods§

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fn try_super_fold_with<F>( self, folder: &mut F ) -> Result<Self, <F as FallibleTypeFolder<I>>::Error>
where F: FallibleTypeFolder<I>,

Provides a default fold for a recursive type of interest. This should only be called within TypeFolder methods, when a non-custom traversal is desired for the value of the type of interest passed to that method. For example, in MyFolder::try_fold_ty(ty), it is valid to call ty.try_super_fold_with(self), but any other folding should be done with xyz.try_fold_with(self).

Provided Methods§

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fn super_fold_with<F>(self, folder: &mut F) -> Self
where F: TypeFolder<I>,

A convenient alternative to try_super_fold_with for use with infallible folders. Do not override this method, to ensure coherence with try_super_fold_with.

Object Safety§

This trait is not object safe.

Implementors§

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impl<'tcx> TypeSuperFoldable<TyCtxt<'tcx>> for Const<'tcx>

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

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impl<'tcx> TypeSuperFoldable<TyCtxt<'tcx>> for Ty<'tcx>

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impl<I, T> TypeSuperFoldable<I> for Binder<I, T>
where I: Interner, T: TypeFoldable<I>,