Struct cfg::rule::Rule

pub struct Rule {
    pub rhs: Vec<Symbol>,
    pub history_id: HistoryId,
    /* private fields */
}

Typical grammar rule representation.

Fields

rhs: Vec<Symbol>

The rule’s right-hand side.

history_id: HistoryId

The rule’s history.

Implementations

impl Rule

pub fn new(lhs: Symbol, rhs: Vec<Symbol>, history_id: HistoryId) -> Self

Creates a new rule.

Trait Implementations

impl Clone for Rule

fn clone(&self) -> Rule

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Rule

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

Formats the value using the given formatter.

impl GrammarRule for Rule

fn lhs(&self) -> Symbol

Returns the rule’s left-hand side.

fn rhs(&self) -> &[Symbol]

Returns the rule’s right-hand side.

fn history_id(&self) -> HistoryId

Returns a reference to the history carried with the rule.

fn as_ref(&self) -> RuleRef<'_>