Method pre

src/graph/directed/order.rs:22–24

Returns the vertices in preorder.

(&self)

impl DepthFirstOrders {
    /// Returns the vertices in preorder.
    pub fn pre(&self) -> Iter<'_, usize> {
        self.pre_order.iter()
    }

    /// Returns the vertices in postorder
    pub fn post(&self) -> Iter<'_, usize> {