class Arborist::Optional

• Arborist::Optional
• Reference
• Object

Defined in:

arborist.cr

Constructors

• .new(exp : Arborist::Apply | Arborist::Choice | Arborist::Dot | Arborist::MutexAlt | Arborist::NegLookAhead | Arborist::Optional | Arborist::PosLookAhead | Arborist::Repetition | Arborist::RepetitionOnePlus | Arborist::Sequence | Arborist::Terminal)

Instance Method Summary

• #eval(matcher) : ParseTree | Nil

  returns Array(ParseTree) | Nil

• #label(label : String) : Optional
• #label : String | Nil
• #label=(label : String | Nil)
• #preorder_traverse(matcher, visit : Expr -> _, visited_nodes : Set(Expr))
• #to_s

  Returns a nicely readable and concise string representation of this object, typically intended for users.

Constructor Detail

Instance Method Detail