Module cfg::rule

This module defines grammar rules. Each rule in a context-free grammar consists of a single symbol on its left-hand side and an array of symbols on its right-hand side. In this library, each rule carries additional value called “history.”

Modules

• builder
  Grammar rules can be built with the builder pattern.
• cfg_rule

Structs

• RuleRef
  References rule’s components.

Traits

• AsRuleRef
  Trait for rules of a context-free grammar.