Struct RuleRef

pub struct RuleRef {
    pub variable: usize,
    pub index: usize,
}

A reference to a grammar rule

Fields

variable: usize

The identifier of the variable

index: usize

The index of the rule for the variable

Implementations

impl RuleRef

pub fn new(variable: usize, index: usize) -> RuleRef

Creates a new rule reference

pub fn get_rule_in<'g>(&self, grammar: &'g Grammar) -> &'g Rule

Gets the referenced rule in the grammar

Panics

Panic when the rule’s head cannot be found in the grammar

Trait Implementations

impl Clone for RuleRef

fn clone(&self) -> RuleRef

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for RuleRef

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

Formats the value using the given formatter.

impl PartialEq for RuleRef

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for RuleRef

impl Eq for RuleRef

impl StructuralPartialEq for RuleRef