Struct DepGraphMut

pub struct DepGraphMut<'a> { /* private fields */ }

A mutable graph view.

This data structure provides a mutable view of a CoNLL-U dependency graph. The view can be used to retrieve the dependents of a head or the head of a dependent. In addition, the add_deprel method can be used to add dependency relations to the graph.

Implementations

impl<'a> DepGraphMut<'a>

pub fn add_deprel<S>(&mut self, triple: DepTriple<S>) -> Result<(), Error>

where S: Into<String>,

Add a dependency relation between head and dependent.

If dependent already has a head relation, this relation is removed to ensure single-headedness.

pub fn dependents(&self, head: usize) -> impl Iterator<Item = DepTriple<&str>>

Return an iterator over the dependents of head.

pub fn head(&self, dependent: usize) -> Option<DepTriple<&str>>

Return the head relation of dependent, if any.

pub fn remove_head_rel(&mut self, dependent: usize) -> Option<DepTriple<String>>

Remove relation of a token to its head.

Returns the index of the head iff a head was removed.

pub fn len(&self) -> usize

Get the number of nodes in the dependency graph.

This is equal to the number of tokens, plus one root node.

Trait Implementations

impl<'a> Index<usize> for DepGraphMut<'a>

type Output = Node

The returned type after indexing.

fn index(&self, idx: usize) -> &Self::Output

Performs the indexing (container[index]) operation.

impl<'a> IndexMut<usize> for DepGraphMut<'a>

fn index_mut(&mut self, idx: usize) -> &mut Self::Output

Performs the mutable indexing (container[index]) operation.