Struct Link 

pub struct Link { /* private fields */ }

Stores a link structure.

Implementations

impl Link

pub fn new() -> Link

Creates a new link.

pub fn head(&self) -> Option<Box<Variable>>

Gets the first item of the link.

pub fn tip(&self) -> Option<Box<Variable>>

Gets the last item of the link.

pub fn tail(&self) -> Link

Gets the tail of the link.

The tail is the whole link except the first item.

pub fn neck(&self) -> Link

Gets the neck of the link.

The neck is the whole link except the last item.

pub fn is_empty(&self) -> bool

Returns true if the link is empty.

pub fn add(&self, other: &Link) -> Link

Adds another link.

pub fn push(&mut self, v: &Variable) -> Result<(), String>

Pushes a variable to the link.

Trait Implementations

impl Clone for Link

fn clone(&self) -> Link

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Link

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

Formats the value using the given formatter.

impl Default for Link

fn default() -> Link

Returns the “default value” for a type.