Enum branchy::Symbol

pub enum Symbol<Nt, T> {
    Nonterminal(Nt),
    Terminal(T),
}

Used to describe non-terminal and terminal symbols in Rules and grammar input sequences for Expander::expand().

Variants

Nonterminal(Nt)

Variant for non-terminal symbols - ones which can be further expanded, can appear on left-hand side of rules and cannot appear in a successful expansion result.

Terminal(T)

Variant for terminal symbols - ones which will not be replaced during expansion, cannot appear on left-hand side of rules and will be the only ones in a successful expansion result.

Methods

impl<Nt, T> Symbol<Nt, T>

pub fn is_terminal(&self) -> bool

pub fn is_nonterminal(&self) -> bool

pub fn unwrap_nonterm(self) -> Nt

pub fn expect_nonterm(self, message: &'static str) -> Nt

pub fn unwrap_term(self) -> T

pub fn expect_term(self, message: &'static str) -> T

Trait Implementations

impl<Nt: Clone, T: Clone> Clone for Symbol<Nt, T>

fn clone(&self) -> Symbol<Nt, T>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<Nt: Copy, T: Copy> Copy for Symbol<Nt, T>

impl<Nt: Debug, T: Debug> Debug for Symbol<Nt, T>

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

Formats the value using the given formatter.

impl<Nt: PartialEq, T: PartialEq> PartialEq<Symbol<Nt, T>> for Symbol<Nt, T>

fn eq(&self, other: &Symbol<Nt, T>) -> bool

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

fn ne(&self, other: &Symbol<Nt, T>) -> bool

This method tests for !=.

impl<Nt, T> StructuralPartialEq for Symbol<Nt, T>