class Dentaku::AST::Xor

def self.max_param_count
  Float::INFINITY
end

def self.min_param_count
  1
end

def value(context = {})
  if @args.empty?
    raise Dentaku::ArgumentError.for(
      :too_few_arguments,
      function_name: 'XOR()', at_least: 1, given: 0
    ), 'XOR() requires at least one argument'
  end
  true_arg_count = 0
  @args.each do |arg|
    case arg.value(context)
    when TrueClass
      true_arg_count += 1
      break if true_arg_count > 1
    when FalseClass, nil
      next
    else
      raise Dentaku::ArgumentError.for(
        :incompatible_type,
        function_name: 'XOR()', expect: :logical, actual: arg.class
      ), 'XOR() requires arguments to be logical expressions'
    end
  end
  true_arg_count == 1
end