Trait charcoal::traversal::Visitor[−][src]

pub trait Visitor {
    type Target: Traversable;
    type Output;
    fn visit<C>(
        &mut self, 
        traversable: impl Borrow<Self::Target>, 
        cursor: CursorResult<C>
    ) -> VisitorDirection<C, Self::Output>
    where
        C: From<<Self::Target as Traversable>::Cursor> + Into<<Self::Target as Traversable>::Cursor> + Clone + Debug + Eq;
}

Iterator-like structures which control a traversable tree’s cursor and use it to read information from the tree.

Normal visitors cannot mutate trees without the use of interior mutability. See VisitorMut for a mutable version of this trait.

Associated Types

type Target: Traversable[src]

The target type which will be traversed by the visitor.

type Output[src]

The final value produced by the visitor.

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Required methods

fn visit<C>(
    &mut self,
    traversable: impl Borrow<Self::Target>,
    cursor: CursorResult<C>
) -> VisitorDirection<C, Self::Output> where
    C: From<<Self::Target as Traversable>::Cursor> + Into<<Self::Target as Traversable>::Cursor> + Clone + Debug + Eq, [src]

Visit the provided node, returning further directions for traversal.

Panics

Required to panic if called after a Stop value has already been produced. May also panic for other reasons, as appropriate and specified by the documentation on the trait implementation.

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Implementations on Foreign Types

impl<T: Visitor> Visitor for &mut T[src]

type Target = T::Target

type Output = T::Output

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Implementors

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