mxhold/lifelike

module Lifelike
  class LifelikeError < StandardError
  end

  class InsufficientValidCharacterError < LifelikeError
    def initialize(valid_characters)
      super 'Insufficient characters for determining life/death. ' \
        'Expected two of the following characters: ' \
        "#{valid_characters.map { |c| "\"#{c}\"" }.join(', ') }"
    end
  end

  class UnexpectedCharacterError < LifelikeError
    def initialize(character, expected:)
      super "Unexpected character: \"#{character}\" " \
        "Expected: #{expected.map { |c| "\"#{c}\"" }.join(' or ')}"
    end
  end

  class UnparsableRuleStringError < LifelikeError
    def initialize(rule_string)
      super "Unparsable rule string: \"#{rule_string}\" " \
        'Expected something like: "B3/S23"'
    end
  end
end