class Arborist::MutexAlt

• Arborist::MutexAlt
• Reference
• Object

Overview

Mutually exclusive terminal alternation A terminal expression, like Terminal, that captures a set of mutually exclusive equal-length strings. If this is ever extended to strings of different length, then none of the strings in the set may be a substring of another string in the set. The range operator can be implemented in terms of this expression. e.g. "a" | "b" | "c" e.g. "abc" | "def" | "xyz"

Defined in:

arborist.cr

Constructors

• .new(strings : Set(String))

Instance Method Summary

• #eval(matcher) : ParseTree | Nil

  returns String | Nil

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

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

Constructor Detail

Instance Method Detail