Struct EmptyNodeList 

pub struct EmptyNodeList;

An empty node list implementation

This is a concrete implementation of NodeList that represents an empty list. It’s used by primitives like empty-node-list.

Implementations

impl EmptyNodeList

pub fn new() -> Self

Trait Implementations

impl Clone for EmptyNodeList

fn clone(&self) -> EmptyNodeList

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for EmptyNodeList

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for EmptyNodeList

fn default() -> Self

Returns the “default value” for a type.

impl NodeList for EmptyNodeList

fn is_empty(&self) -> bool

Check if the node list is empty

fn first(&self) -> Option<Box<dyn Node>>

Get the first node

fn rest(&self) -> Box<dyn NodeList>

Get the rest of the node list (all but first)

fn length(&self) -> usize

Get the length of the node list

fn get(&self, _index: usize) -> Option<Box<dyn Node>>

Get node at index