Trait chalk_ir::fold::TypeSuperFoldable

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pub trait TypeSuperFoldable<I: Interner>: TypeFoldable<I> {
    // Required method
    fn try_super_fold_with<E>(
        self,
        folder: &mut dyn FallibleTypeFolder<I, Error = E>,
        outer_binder: DebruijnIndex,
    ) -> Result<Self, E>;

    // Provided method
    fn super_fold_with(
        self,
        folder: &mut dyn TypeFolder<I>,
        outer_binder: DebruijnIndex,
    ) -> Self { ... }
}

Expand description

For types where “fold” invokes a callback on the TypeFolder, the TypeSuperFoldable trait captures the recursive behavior that folds all the contents of the type.

Required Methods§

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fn try_super_fold_with<E>( self, folder: &mut dyn FallibleTypeFolder<I, Error = E>, outer_binder: DebruijnIndex, ) -> Result<Self, E>

Recursively folds the value.

Provided Methods§

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fn super_fold_with( self, folder: &mut dyn TypeFolder, outer_binder: DebruijnIndex, ) -> Self

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.