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Contents
# = Uninheritable
#
# Allows an object to declare itself as unable to be subclassed. The
# technique behind this is very simple (redefinition of #inherited), so this
# just provides an easier way to do the same thing with a consistent error
# message.
#
# == Usage
#
# class A
# extend Uninheritable
# end
#
# class B < A; end # => raises TypeError
#
# == AUTHORS
#
# * Austin Ziegler
#
# == COPYRIGHT
#
# Copyright (c) 2003 Austin Ziegler
#
# == LICENSE
#
# Ruby License
#
# This module is free software. You may use, modify, and/or redistribute this
# software under the same terms as Ruby.
#
# This program is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
# FOR A PARTICULAR PURPOSE.
#
# = Uninheritable
#
# Allows an object to declare itself as unable to be subclassed. The
# technique behind this is very simple (redefinition of #inherited), so this
# just provides an easier way to do the same thing with a consistent error
# message.
#
module Uninheritable
# Redefines a class's #inherited definition to prevent subclassing of the
# class extended by this module.
def inherited(klass)
raise TypeError, "Class #{self} cannot be subclassed."
end
end
Version data entries
11 entries across 11 versions & 2 rubygems