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class Class
# Rubinius
if defined?(Class.__subclasses__)
def descendents
subclasses = []
__subclasses__.each {|k| subclasses << k; subclasses.concat k.descendents }
subclasses
end
else
# MRI
begin
ObjectSpace.each_object(Class.new) {}
def descendents
subclasses = []
ObjectSpace.each_object(class << self; self; end) do |k|
subclasses << k unless k == self
end
subclasses
end
# JRuby
rescue StandardError
def descendents
subclasses = []
ObjectSpace.each_object(Class) do |k|
subclasses << k if k < self
end
subclasses.uniq!
subclasses
end
end
end
end
class Object
def remove_subclasses_of(*superclasses) #:nodoc:
Class.remove_class(*subclasses_of(*superclasses))
end
# Exclude this class unless it's a subclass of our supers and is defined.
# We check defined? in case we find a removed class that has yet to be
# garbage collected. This also fails for anonymous classes -- please
# submit a patch if you have a workaround.
def subclasses_of(*superclasses) #:nodoc:
subclasses = []
superclasses.each do |klass|
subclasses.concat klass.descendents.select {|k| k.name.blank? || k.reachable?}
end
subclasses
end
def extended_by #:nodoc:
ancestors = class << self; ancestors end
ancestors.select { |mod| mod.class == Module } - [ Object, Kernel ]
end
def extend_with_included_modules_from(object) #:nodoc:
object.extended_by.each { |mod| extend mod }
end
end
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