Trait Folder

Source

pub trait Folder<'a> {
    type NodeTy: Node;
    type Out;
    type Context: Clone;

    // Required method
    fn visit_up(
        &mut self,
        node: &'a Self::NodeTy,
        context: Self::Context,
        children: Vec<Self::Out>,
    ) -> VortexResult<FoldUp<Self::Out>>;

    // Provided method
    fn visit_down(
        &mut self,
        _node: &'a Self::NodeTy,
        context: Self::Context,
    ) -> VortexResult<FoldDown<Self::Out, Self::Context>> { ... }
}