Ruby custom error classes: inheritance of the message attribute.

my_custom_error.rb

# Ruby custom error classes: inheritance of the message attribute.
#
# Create a custom exception class in Ruby.
#
# ===== Example:
#
#   begin
#     raise MyCustomError.new(my_object), "a message"
#   rescue MyCustomError => e
#     puts e.message # => "a message"
#     puts e.object.inspect # => my_object: {...}
#   end
#
# See:: https://stackoverflow.com/a/16108216/2334082
#
class MyCustomError < StandardError
  attr_reader :object

  def initialize(object = nil)
    super I18n.t('error...')
    @object = object
  end
end