Struct perplex::item_set::Item

pub struct Item { /* fields omitted */ }

A single item.

Methods

impl Item

pub fn rule(&self) -> RuleId

Get the rule this item represents.

pub fn lookahead(&self) -> TerminalId

Get the lookahead terminal of this item.

pub fn marker(&self) -> usize

Get the position of the marker within the rule.

pub fn action(&self) -> Option<(Symbol, Action)>

Get the action associated with this item.

pub fn set_action(&mut self, action: Option<(Symbol, Action)>)

Change the action of this item.

pub fn pretty<'a>(     &'a self,     grammar: &'a Grammar ) -> Pretty<&'a Grammar, &'a Self>

Get a pretty printer for this item.

pub fn is_shift(&self) -> bool

Whether this item has a shift action.

pub fn is_reduce(&self) -> bool

Whether this item has a reduce action.

pub fn has_action(&self) -> bool

Whether this item has an action.

Trait Implementations

impl Debug for Item

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

Formats the value using the given formatter.

impl Copy for Item

impl Clone for Item

fn clone(&self) -> Item

Returns a copy of the value.

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

Performs copy-assignment from source.

impl PartialEq for Item

fn eq(&self, other: &Item) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Item) -> bool

This method tests for !=.

impl Eq for Item

impl Hash for Item

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given [Hasher].

fn hash_slice<H>(data: &[Self], state: &mut H) where     H: Hasher,

Feeds a slice of this type into the given [Hasher].