Enum Atom

pub enum Atom {
    Terminal(Lit),
    NonTerminal(Ident),
    Sub(Box<Production>),
    Choice(Box<Production>, Vec<Production>),
    Repeat(Box<Atom>),
    Repeat1(Box<Atom>),
    Optional(Box<Atom>),
    LookAhead(Box<Atom>),
    LookAheadNot(Box<Atom>),
}

Atom ::= '(' Production ')'
       | '[' Production ('|' Production)* ']'
       | Terminal
       | NonTerminal

Variants

Terminal(Lit)

NonTerminal(Ident)

Sub(Box<Production>)

Choice(Box<Production>, Vec<Production>)

Repeat(Box<Atom>)

Repeat1(Box<Atom>)

Optional(Box<Atom>)

LookAhead(Box<Atom>)

LookAheadNot(Box<Atom>)

Trait Implementations

impl Debug for Atom

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

Formats the value using the given formatter.

impl Parse for Atom

fn parse(input: ParseStream<'_>) -> Result<Self>