module Either

# File lib/either.rb, line 17
def self.match(e, left:, right:)
  if e.right?
    right.call(e.send(:val))
  elsif e.left?
    left.call(e.send(:val))
  end
end

# File lib/either.rb, line 4
def self.new(&block)
  val = begin
          block.call()
        rescue Exception => e
          e
        end
  if val.nil? || val.is_a?(Exception)
    Left.new(val)
  else
    Right.new(val)
  end
end