udgraph 0.8.0

Universal dependency graphs
Documentation 
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/// Graph processing error.
#[derive(Debug, thiserror::Error, Eq, PartialEq)]
#[non_exhaustive]
pub enum Error {
    #[error("dependent {dependent:?} is out of bounds for graph with {node_count:?} vertices")]
    DependentOutOfBounds { dependent: usize, node_count: usize },

    #[error("head {head:?} is out of bounds for graph with {node_count:?} vertices")]
    HeadOutOfBounds { head: usize, node_count: usize },
}