class Dry::Logic::Rule

def self.method_added(meth)
  super
  if meth == :call
    alias_method :[], :call
  end
end

def and(other)
  Conjunction.new(self, other)
end

def curry(*args)
  if arity > 0
    new(predicate.curry(*args))
  else
    self
  end
end

def each?
  predicate.is_a?(Rule::Each)
end

def initialize(predicate, options = {})
  @predicate = predicate
  @options = options
end

def negation
  Negation.new(self)
end

def new(predicate)
  self.class.new(predicate, options)
end

def or(other)
  Disjunction.new(self, other)
end

def predicate_id
  predicate.id
end

def then(other)
  Implication.new(self, other)
end

def type
  raise NotImplementedError
end

def xor(other)
  ExclusiveDisjunction.new(self, other)
end