Class: Fabulator::Grammar::Expr::Rules

Inherits:

Object

• Object
• Fabulator::Grammar::Expr::Rules

Defined in:

lib/fabulator/grammar/expr/rules.rb

Instance Method Summary

• #add_alternative(a) ⇒ Object
• #initialize ⇒ Rules constructor

  A new instance of Rules.

• #to_regex ⇒ Object

Constructor Details

#initialize ⇒ Rules

Returns a new instance of Rules.

# File 'lib/fabulator/grammar/expr/rules.rb', line 3

def initialize
  @alternatives = [ ]
end

Instance Method Details

#add_alternative(a) ⇒ Object

# File 'lib/fabulator/grammar/expr/rules.rb', line 7

def add_alternative(a)
  @alternatives << a
end

#to_regex ⇒ Object

# File 'lib/fabulator/grammar/expr/rules.rb', line 11

def to_regex
  Regexp.union(@alternatives.collect{|a| a.to_regex })
end