Struct RuleBuilder 

pub struct RuleBuilder<'a> { /* private fields */ }

The rule builder.

Implementations

impl<'a> RuleBuilder<'a>

pub fn new(grammar: &'a mut Cfg) -> RuleBuilder<'a>

Creates a rule builder.

impl<'a> RuleBuilder<'a>

pub fn rule(self, lhs: Symbol) -> RuleBuilder<'a>

Starts building a new rule with the given LHS.

pub fn history(self, history: History) -> RuleBuilder<'a>

Assigns the rule history, which is used on the next call to rhs, or overwritten by a call to rhs_with_history.

pub fn rhs(self, syms: impl AsRef<[Symbol]>) -> RuleBuilder<'a>

Adds a rule alternative to the grammar. If history wasn’t provided, the rule has the Default history.

pub fn rhs_with_history( self, syms: impl AsRef<[Symbol]>, history: History, ) -> RuleBuilder<'a>

Adds a rule alternative with the given RHS and history to the grammar.

pub fn rhs_with_linked_history( self, syms: impl AsRef<[Symbol]>, linked_history: LinkedHistoryNode, ) -> RuleBuilder<'a>

Adds a rule alternative with the given RHS and history to the grammar.

pub fn precedenced_rule(self, lhs: Symbol) -> PrecedencedRuleBuilder<'a>

Starts building a new precedenced rule.