Trait rustc_middle::ty::fold::TypeFoldable

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

This trait is implemented for every type that can be folded, providing the skeleton of the traversal.

To implement this conveniently, use the derive macro located in rustc_macros.

This trait is a sub-trait of TypeVisitable. This is because many TypeFolder instances use the methods in TypeVisitableExt while folding, which means in practice almost every foldable type needs to also be visitable. (However, there are some types that are visitable without being foldable.)

Required Methods§

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

The entry point for folding. To fold a value t with a folder f call: t.try_fold_with(f).

For most types, this just traverses the value, calling try_fold_with on each field/element.

For types of interest (such as Ty), the implementation of this method calls a folder method specifically for that type (such as F::try_fold_ty). This is where control transfers from TypeFoldable to TypeFolder.

Provided Methods§

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

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

Object Safety§

This trait is not object safe.

Implementations on Foreign Types§

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for &'tcx [InlineAsmTemplatePiece]

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fn try_fold_with<F: FallibleTypeFolder<TyCtxt<'tcx>>>( self, _folder: &mut F, ) -> Result<Self, F::Error>

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for &'tcx [Span]

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fn try_fold_with<F: FallibleTypeFolder<TyCtxt<'tcx>>>( self, _folder: &mut F, ) -> Result<Self, F::Error>

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for ByRef

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fn try_fold_with<F: FallibleTypeFolder<TyCtxt<'tcx>>>( self, _: &mut F, ) -> Result<Self, F::Error>

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fn fold_with<F: TypeFolder<TyCtxt<'tcx>>>(self, _: &mut F) -> Self

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for InlineAsmTemplatePiece

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fn try_fold_with<F: FallibleTypeFolder<TyCtxt<'tcx>>>( self, _: &mut F, ) -> Result<Self, F::Error>

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fn fold_with<F: TypeFolder<TyCtxt<'tcx>>>(self, _: &mut F) -> Self

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for Res

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fn try_fold_with<F: FallibleTypeFolder<TyCtxt<'tcx>>>( self, _: &mut F, ) -> Result<Self, F::Error>

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fn fold_with<F: TypeFolder<TyCtxt<'tcx>>>(self, _: &mut F) -> Self

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for CoroutineKind

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fn try_fold_with<F: FallibleTypeFolder<TyCtxt<'tcx>>>( self, _: &mut F, ) -> Result<Self, F::Error>

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fn fold_with<F: TypeFolder<TyCtxt<'tcx>>>(self, _: &mut F) -> Self

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for MatchSource

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fn try_fold_with<F: FallibleTypeFolder<TyCtxt<'tcx>>>( self, _: &mut F, ) -> Result<Self, F::Error>

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fn fold_with<F: TypeFolder<TyCtxt<'tcx>>>(self, _: &mut F) -> Self

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for Safety

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fn try_fold_with<F: FallibleTypeFolder<TyCtxt<'tcx>>>( self, _: &mut F, ) -> Result<Self, F::Error>

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fn fold_with<F: TypeFolder<TyCtxt<'tcx>>>(self, _: &mut F) -> Self

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for InlineAsmRegOrRegClass

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fn try_fold_with<F: FallibleTypeFolder<TyCtxt<'tcx>>>( self, _: &mut F, ) -> Result<Self, F::Error>

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fn fold_with<F: TypeFolder<TyCtxt<'tcx>>>(self, _: &mut F) -> Self

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for Abi

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fn try_fold_with<F: FallibleTypeFolder<TyCtxt<'tcx>>>( self, _: &mut F, ) -> Result<Self, F::Error>

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fn fold_with<F: TypeFolder<TyCtxt<'tcx>>>(self, _: &mut F) -> Self

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for Size

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fn try_fold_with<F: FallibleTypeFolder<TyCtxt<'tcx>>>( self, _: &mut F, ) -> Result<Self, F::Error>

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fn fold_with<F: TypeFolder<TyCtxt<'tcx>>>(self, _: &mut F) -> Self

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for InlineAsmOptions

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fn try_fold_with<F: FallibleTypeFolder<TyCtxt<'tcx>>>( self, _: &mut F, ) -> Result<Self, F::Error>

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fn fold_with<F: TypeFolder<TyCtxt<'tcx>>>(self, _: &mut F) -> Self

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for NodeId

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fn try_fold_with<F: FallibleTypeFolder<TyCtxt<'tcx>>>( self, _: &mut F, ) -> Result<Self, F::Error>

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fn fold_with<F: TypeFolder<TyCtxt<'tcx>>>(self, _: &mut F) -> Self

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for HirId

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fn try_fold_with<F: FallibleTypeFolder<TyCtxt<'tcx>>>( self, _: &mut F, ) -> Result<Self, F::Error>

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fn fold_with<F: TypeFolder<TyCtxt<'tcx>>>(self, _: &mut F) -> Self

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for DefId

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fn try_fold_with<F: FallibleTypeFolder<TyCtxt<'tcx>>>( self, _: &mut F, ) -> Result<Self, F::Error>

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fn fold_with<F: TypeFolder<TyCtxt<'tcx>>>(self, _: &mut F) -> Self

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for LocalDefId

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fn try_fold_with<F: FallibleTypeFolder<TyCtxt<'tcx>>>( self, _: &mut F, ) -> Result<Self, F::Error>

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fn fold_with<F: TypeFolder<TyCtxt<'tcx>>>(self, _: &mut F) -> Self

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for Span

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fn try_fold_with<F: FallibleTypeFolder<TyCtxt<'tcx>>>( self, _: &mut F, ) -> Result<Self, F::Error>

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fn fold_with<F: TypeFolder<TyCtxt<'tcx>>>(self, _: &mut F) -> Self

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for ErrorGuaranteed

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fn try_fold_with<F: FallibleTypeFolder<TyCtxt<'tcx>>>( self, _: &mut F, ) -> Result<Self, F::Error>

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fn fold_with<F: TypeFolder<TyCtxt<'tcx>>>(self, _: &mut F) -> Self

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for Ident

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fn try_fold_with<F: FallibleTypeFolder<TyCtxt<'tcx>>>( self, _: &mut F, ) -> Result<Self, F::Error>

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fn fold_with<F: TypeFolder<TyCtxt<'tcx>>>(self, _: &mut F) -> Self

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for Symbol

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fn try_fold_with<F: FallibleTypeFolder<TyCtxt<'tcx>>>( self, _: &mut F, ) -> Result<Self, F::Error>

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fn fold_with<F: TypeFolder<TyCtxt<'tcx>>>(self, _: &mut F) -> Self

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for FieldIdx

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fn try_fold_with<F: FallibleTypeFolder<TyCtxt<'tcx>>>( self, _: &mut F, ) -> Result<Self, F::Error>

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fn fold_with<F: TypeFolder<TyCtxt<'tcx>>>(self, _: &mut F) -> Self

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for VariantIdx

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fn try_fold_with<F: FallibleTypeFolder<TyCtxt<'tcx>>>( self, _: &mut F, ) -> Result<Self, F::Error>

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fn fold_with<F: TypeFolder<TyCtxt<'tcx>>>(self, _: &mut F) -> Self

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impl<'tcx, T: TypeFoldable<TyCtxt<'tcx>> + Debug + Clone> TypeFoldable<TyCtxt<'tcx>> for Spanned<T>

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fn try_fold_with<F: FallibleTypeFolder<TyCtxt<'tcx>>>( self, folder: &mut F, ) -> Result<Self, F::Error>

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impl<I> TypeFoldable<I> for bool
where I: Interner,

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fn try_fold_with<F>( self, _: &mut F, ) -> Result<bool, <F as FallibleTypeFolder<I>>::Error>
where F: FallibleTypeFolder<I>,

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fn fold_with<F>(self, _: &mut F) -> bool
where F: TypeFolder<I>,

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impl<I> TypeFoldable<I> for u16
where I: Interner,

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fn try_fold_with<F>( self, _: &mut F, ) -> Result<u16, <F as FallibleTypeFolder<I>>::Error>
where F: FallibleTypeFolder<I>,

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fn fold_with<F>(self, _: &mut F) -> u16
where F: TypeFolder<I>,

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impl<I> TypeFoldable<I> for u32
where I: Interner,

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fn try_fold_with<F>( self, _: &mut F, ) -> Result<u32, <F as FallibleTypeFolder<I>>::Error>
where F: FallibleTypeFolder<I>,

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fn fold_with<F>(self, _: &mut F) -> u32
where F: TypeFolder<I>,

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impl<I> TypeFoldable<I> for u64
where I: Interner,

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fn try_fold_with<F>( self, _: &mut F, ) -> Result<u64, <F as FallibleTypeFolder<I>>::Error>
where F: FallibleTypeFolder<I>,

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fn fold_with<F>(self, _: &mut F) -> u64
where F: TypeFolder<I>,

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impl<I> TypeFoldable<I> for ()
where I: Interner,

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fn try_fold_with<F>( self, _: &mut F, ) -> Result<(), <F as FallibleTypeFolder<I>>::Error>
where F: FallibleTypeFolder<I>,

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fn fold_with<F>(self, _: &mut F)
where F: TypeFolder<I>,

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impl<I> TypeFoldable<I> for usize
where I: Interner,

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fn try_fold_with<F>( self, _: &mut F, ) -> Result<usize, <F as FallibleTypeFolder<I>>::Error>
where F: FallibleTypeFolder<I>,

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fn fold_with<F>(self, _: &mut F) -> usize
where F: TypeFolder<I>,

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impl<I> TypeFoldable<I> for String
where I: Interner,

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fn try_fold_with<F>( self, _: &mut F, ) -> Result<String, <F as FallibleTypeFolder<I>>::Error>
where F: FallibleTypeFolder<I>,

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fn fold_with<F>(self, _: &mut F) -> String
where F: TypeFolder<I>,

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impl<I, A, B, C> TypeFoldable<I> for (A, B, C)
where I: Interner, A: TypeFoldable<I>, B: TypeFoldable<I>, C: TypeFoldable<I>,

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fn try_fold_with<F>( self, folder: &mut F, ) -> Result<(A, B, C), <F as FallibleTypeFolder<I>>::Error>
where F: FallibleTypeFolder<I>,

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impl<I, T> TypeFoldable<I> for Option<T>
where I: Interner, T: TypeFoldable<I>,

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fn try_fold_with<F>( self, folder: &mut F, ) -> Result<Option<T>, <F as FallibleTypeFolder<I>>::Error>
where F: FallibleTypeFolder<I>,

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impl<I, T> TypeFoldable<I> for Box<T>
where I: Interner, T: TypeFoldable<I>,

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fn try_fold_with<F>( self, folder: &mut F, ) -> Result<Box<T>, <F as FallibleTypeFolder<I>>::Error>
where F: FallibleTypeFolder<I>,

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impl<I, T> TypeFoldable<I> for Rc<T>
where I: Interner, T: TypeFoldable<I>,

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fn try_fold_with<F>( self, folder: &mut F, ) -> Result<Rc<T>, <F as FallibleTypeFolder<I>>::Error>
where F: FallibleTypeFolder<I>,

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impl<I, T> TypeFoldable<I> for Vec<T>
where I: Interner, T: TypeFoldable<I>,

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fn try_fold_with<F>( self, folder: &mut F, ) -> Result<Vec<T>, <F as FallibleTypeFolder<I>>::Error>
where F: FallibleTypeFolder<I>,

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impl<I, T, E> TypeFoldable<I> for Result<T, E>
where I: Interner, T: TypeFoldable<I>, E: TypeFoldable<I>,

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fn try_fold_with<F>( self, folder: &mut F, ) -> Result<Result<T, E>, <F as FallibleTypeFolder<I>>::Error>
where F: FallibleTypeFolder<I>,

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impl<I, T, Ix> TypeFoldable<I> for IndexVec<Ix, T>
where I: Interner, T: TypeFoldable<I>, Ix: Idx,

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fn try_fold_with<F>( self, folder: &mut F, ) -> Result<IndexVec<Ix, T>, <F as FallibleTypeFolder<I>>::Error>
where F: FallibleTypeFolder<I>,

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impl<I, T, U> TypeFoldable<I> for (T, U)
where I: Interner, T: TypeFoldable<I>, U: TypeFoldable<I>,

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fn try_fold_with<F>( self, folder: &mut F, ) -> Result<(T, U), <F as FallibleTypeFolder<I>>::Error>
where F: FallibleTypeFolder<I>,

Implementors§

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for &'tcx List<LocalDefId>

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for &'tcx List<Const<'tcx>>

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for &'tcx List<Ty<'tcx>>

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for &'tcx List<PlaceElem<'tcx>>

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for &'tcx List<PolyExistentialPredicate<'tcx>>

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for PlaceBase

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for ProjectionKind

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for rustc_middle::infer::canonical::Certainty

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for rustc_middle::mir::consts::Const<'tcx>

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for ConstValue<'tcx>

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for CovTerm

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for CoverageKind

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for MappingKind

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for Op

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for BindingForm<'tcx>

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for LocalInfo<'tcx>

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for MentionedItem<'tcx>

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for VarDebugInfoContents<'tcx>

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for ErrorHandled

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for Scalar

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for ConstraintCategory<'tcx>

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for ReturnConstraint

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for AggregateKind<'tcx>

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for BinOp

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for rustc_middle::mir::syntax::BorrowKind

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for CallSource

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for rustc_middle::mir::syntax::CastKind

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for FakeReadCause

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for InlineAsmOperand<'tcx>

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for MirPhase

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for NonDivergingIntrinsic<'tcx>

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for NullOp<'tcx>

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for Operand<'tcx>

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for RetagKind

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for Rvalue<'tcx>

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for StatementKind<'tcx>

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for TerminatorKind<'tcx>

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for UnOp

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for UnwindAction

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for UnwindTerminateReason

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for IsConstable

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for ObligationCauseCode<'tcx>

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for Reveal

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for WellFormedLoc

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for OutlivesBound<'tcx>

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for OverflowError

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for rustc_middle::ty::abstract_const::CastKind

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for NotConstEvaluatable

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for Adjust<'tcx>

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for AutoBorrow<'tcx>

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for AutoBorrowMutability

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for PointerCoercion

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for AdtKind

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for AssocKind

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for rustc_middle::ty::closure::BorrowKind

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for UpvarCapture

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for ExprKind

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for ValTree<'tcx>

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for Asyncness

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for ClosureKind

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for ImplSubject<'tcx>

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for InferConst

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for InstanceDef<'tcx>

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for ReifyReason

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for PatternKind<'tcx>

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for BoundRegionKind

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for UpvarArgs<'tcx>

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for UserType<'tcx>

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for rustc_middle::hir::place::Place<'tcx>

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for Projection<'tcx>

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for QueryRegionConstraints<'tcx>

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for MemberConstraint<'tcx>

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for Scope

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for BasicBlocks<'tcx>

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for Cache

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for rustc_middle::mir::consts::UnevaluatedConst<'tcx>

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for BlockMarkerId

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for BranchInfo

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for BranchSpan

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for CodeRegion

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for ConditionId

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for ConditionInfo

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for CounterId

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for DecisionInfo

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for Expression

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for ExpressionId

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for FunctionCoverageInfo

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for MCDCBranchSpan

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for MCDCDecisionSpan

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for Mapping

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for CtfeProvenance

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for AllocId

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for GlobalId<'tcx>

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for CoroutineLayout<'tcx>

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for CoroutineSavedLocal

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for CoroutineSavedTy<'tcx>

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for Statement<'tcx>

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for BasicBlock

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for BasicBlockData<'tcx>

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for BlockTailInfo

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for Body<'tcx>

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for CoroutineInfo<'tcx>

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for Local

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for LocalDecl<'tcx>

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for MirSource<'tcx>

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for Promoted

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for SourceInfo

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for SourceScope

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for SourceScopeData<'tcx>

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for SourceScopeLocalData

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for UserTypeProjection

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for UserTypeProjections

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for VarDebugInfo<'tcx>

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for VarDebugInfoFragment<'tcx>

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for ConstOperand<'tcx>

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for CopyNonOverlapping<'tcx>

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for rustc_middle::mir::syntax::Place<'tcx>

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for SwitchTargets

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for PlaceTy<'tcx>

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for Terminator<'tcx>

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for DropckOutlivesResult<'tcx>

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for NormalizationResult<'tcx>

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for AscribeUserType<'tcx>

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for Eq<'tcx>

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for ProvePredicate<'tcx>

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for Subtype<'tcx>

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for ExternalConstraints<'tcx>

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for ExternalConstraintsData<'tcx>

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for NestedNormalizationGoals<'tcx>

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for PredefinedOpaques<'tcx>

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for DerivedCause<'tcx>

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for IfExpressionCause<'tcx>

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for ImplDerivedCause<'tcx>

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for InternedObligationCauseCode<'tcx>

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for MatchExpressionArmCause<'tcx>

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for ObligationCause<'tcx>

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for UnifyReceiverContext<'tcx>

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for Adjustment<'tcx>

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for OverloadedDeref<'tcx>

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for AssocItem

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for CaptureInfo

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for CapturedPlace<'tcx>

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for UpvarId

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for UpvarPath

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for Expr<'tcx>

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for rustc_middle::ty::consts::Const<'tcx>

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for GenericArg<'tcx>

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for UserArgs<'tcx>

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for UserSelfTy<'tcx>

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for Instance<'tcx>

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for Pattern<'tcx>

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

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

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for TraitPredPrintModifiersAndPath<'tcx>

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for TraitRefPrintOnlyTraitName<'tcx>

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for TraitRefPrintOnlyTraitPath<'tcx>

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for TraitRefPrintSugared<'tcx>

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for BoundRegion

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for LateParamRegion

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for Region<'tcx>

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for BoundVar

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for ClosureSizeProfileData<'tcx>

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for ImplHeader<'tcx>

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for InstantiatedPredicates<'tcx>

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for OpaqueHiddenType<'tcx>

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for OpaqueTypeKey<'tcx>

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for ParamEnv<'tcx>

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for Placeholder<BoundRegion>

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for Placeholder<BoundVar>

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for Placeholder<BoundTy>

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for Term<'tcx>

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

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for ParamConst

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for ParamTy

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for CanonicalUserTypeAnnotation<'tcx>

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for UserTypeAnnotationIndex

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for CanonicalVarInfos<'tcx>

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for GenericArgsRef<'tcx>

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impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for Clauses<'tcx>

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impl<'tcx, N> TypeFoldable<TyCtxt<'tcx>> for ImplSource<'tcx, N>
where N: TypeFoldable<TyCtxt<'tcx>>,

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impl<'tcx, N> TypeFoldable<TyCtxt<'tcx>> for ImplSourceUserDefinedData<'tcx, N>
where N: TypeFoldable<TyCtxt<'tcx>>,

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impl<'tcx, O> TypeFoldable<TyCtxt<'tcx>> for AssertKind<O>
where O: TypeFoldable<TyCtxt<'tcx>>,

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impl<'tcx, R> TypeFoldable<TyCtxt<'tcx>> for QueryResponse<'tcx, R>
where R: TypeFoldable<TyCtxt<'tcx>>,

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impl<'tcx, T> TypeFoldable<TyCtxt<'tcx>> for ClearCrossCrate<T>
where T: TypeFoldable<TyCtxt<'tcx>>,

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impl<'tcx, T> TypeFoldable<TyCtxt<'tcx>> for Normalize<T>
where T: TypeFoldable<TyCtxt<'tcx>>,

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impl<'tcx, T> TypeFoldable<TyCtxt<'tcx>> for ParamEnvAnd<'tcx, T>
where T: TypeFoldable<TyCtxt<'tcx>>,

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impl<'tcx, V, T> TypeFoldable<TyCtxt<'tcx>> for ProjectionElem<V, T>
where T: TypeFoldable<TyCtxt<'tcx>>, V: TypeFoldable<TyCtxt<'tcx>>,

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impl<I> TypeFoldable<I> for ExistentialPredicate<I>

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impl<I> TypeFoldable<I> for ClauseKind<I>

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impl<I> TypeFoldable<I> for PredicateKind<I>

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impl<I> TypeFoldable<I> for AliasRelationDirection
where I: Interner,

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impl<I> TypeFoldable<I> for AliasTyKind
where I: Interner,

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impl<I> TypeFoldable<I> for BoundConstness
where I: Interner,

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impl<I> TypeFoldable<I> for CanonicalTyVarKind
where I: Interner,

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impl<I> TypeFoldable<I> for CanonicalVarKind<I>

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impl<I> TypeFoldable<I> for FloatTy
where I: Interner,

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impl<I> TypeFoldable<I> for InferTy
where I: Interner,

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impl<I> TypeFoldable<I> for IntVarValue
where I: Interner,

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impl<I> TypeFoldable<I> for Movability
where I: Interner,

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impl<I> TypeFoldable<I> for Mutability
where I: Interner,

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impl<I> TypeFoldable<I> for PredicatePolarity
where I: Interner,

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impl<I> TypeFoldable<I> for Variance
where I: Interner,

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impl<I> TypeFoldable<I> for BuiltinImplSource
where I: Interner,

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impl<I> TypeFoldable<I> for rustc_middle::ty::solve::Certainty
where I: Interner,

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impl<I> TypeFoldable<I> for GoalSource
where I: Interner,

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impl<I> TypeFoldable<I> for MaybeCause
where I: Interner,

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impl<I> TypeFoldable<I> for ProbeKind<I>

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impl<I> TypeFoldable<I> for rustc_type_ir::const_kind::UnevaluatedConst<I>

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impl<I> TypeFoldable<I> for AliasTerm<I>

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impl<I> TypeFoldable<I> for CoercePredicate<I>
where I: Interner, <I as Interner>::Ty: TypeFoldable<I>,

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impl<I> TypeFoldable<I> for ExistentialProjection<I>

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impl<I> TypeFoldable<I> for ExistentialTraitRef<I>

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impl<I> TypeFoldable<I> for NormalizesTo<I>
where I: Interner, AliasTerm<I>: TypeFoldable<I>, <I as Interner>::Term: TypeFoldable<I>,

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impl<I> TypeFoldable<I> for ProjectionPredicate<I>
where I: Interner, AliasTerm<I>: TypeFoldable<I>, <I as Interner>::Term: TypeFoldable<I>,

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impl<I> TypeFoldable<I> for SubtypePredicate<I>
where I: Interner, <I as Interner>::Ty: TypeFoldable<I>,

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impl<I> TypeFoldable<I> for TraitPredicate<I>
where I: Interner, TraitRef<I>: TypeFoldable<I>,

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impl<I> TypeFoldable<I> for TraitRef<I>

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impl<I> TypeFoldable<I> for AliasTy<I>

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impl<I> TypeFoldable<I> for FnSig<I>
where I: Interner, <I as Interner>::Tys: TypeFoldable<I>, <I as Interner>::Safety: TypeFoldable<I>, <I as Interner>::Abi: TypeFoldable<I>,

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impl<I> TypeFoldable<I> for TypeAndMut<I>
where I: Interner, <I as Interner>::Ty: TypeFoldable<I>,

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impl<I> TypeFoldable<I> for NoSolution
where I: Interner,

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impl<I> TypeFoldable<I> for Response<I>

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impl<I> TypeFoldable<I> for CanonicalVarInfo<I>

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impl<I> TypeFoldable<I> for CanonicalVarValues<I>
where I: Interner, <I as Interner>::GenericArgs: TypeFoldable<I>,

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impl<I> TypeFoldable<I> for ClosureArgs<I>
where I: Interner, <I as Interner>::GenericArgs: TypeFoldable<I>,

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impl<I> TypeFoldable<I> for CoroutineArgs<I>
where I: Interner, <I as Interner>::GenericArgs: TypeFoldable<I>,

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impl<I> TypeFoldable<I> for CoroutineClosureArgs<I>
where I: Interner, <I as Interner>::GenericArgs: TypeFoldable<I>,

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impl<I> TypeFoldable<I> for CoroutineClosureSignature<I>
where I: Interner, <I as Interner>::Ty: TypeFoldable<I>, <I as Interner>::Safety: TypeFoldable<I>, <I as Interner>::Abi: TypeFoldable<I>,

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impl<I> TypeFoldable<I> for DebruijnIndex
where I: Interner,

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impl<I> TypeFoldable<I> for GenSig<I>
where I: Interner, <I as Interner>::Ty: TypeFoldable<I>,

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impl<I> TypeFoldable<I> for RegionVid
where I: Interner,

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impl<I> TypeFoldable<I> for UniverseIndex
where I: Interner,

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impl<I, A> TypeFoldable<I> for OutlivesPredicate<I, A>
where I: Interner, A: TypeFoldable<I>, <I as Interner>::Region: TypeFoldable<I>,

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impl<I, P> TypeFoldable<I> for Goal<I, P>
where I: Interner, <I as Interner>::ParamEnv: TypeFoldable<I>, P: TypeFoldable<I>,

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impl<I, P> TypeFoldable<I> for QueryInput<I, P>

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impl<I, T> !TypeFoldable<I> for EarlyBinder<I, T>
where I: Interner,

For early binders, you should first call instantiate before using any visitors.

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

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impl<I, T> TypeFoldable<I> for State<I, T>

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impl<I, V> TypeFoldable<I> for Canonical<I, V>

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impl<T, I> TypeFoldable<I> for ExpectedFound<T>
where I: Interner, T: TypeFoldable<I>,