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class Object
def remove_subclasses_of(*superclasses) #:nodoc:
Class.remove_class(*subclasses_of(*superclasses))
end
def subclasses_of(*superclasses) #:nodoc:
subclasses = []
# 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.
ObjectSpace.each_object(Class) do |k|
if superclasses.any? { |superclass| k < superclass } &&
(k.name.blank? || eval("defined?(::#{k}) && ::#{k}.object_id == k.object_id"))
subclasses << k
end
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
unless defined? instance_exec # 1.9
module InstanceExecMethods #:nodoc:
end
include InstanceExecMethods
# Evaluate the block with the given arguments within the context of
# this object, so self is set to the method receiver.
#
# From Mauricio's http://eigenclass.org/hiki/bounded+space+instance_exec
def instance_exec(*args, &block)
begin
old_critical, Thread.critical = Thread.critical, true
n = 0
n += 1 while respond_to?(method_name = "__instance_exec#{n}")
InstanceExecMethods.module_eval { define_method(method_name, &block) }
ensure
Thread.critical = old_critical
end
begin
send(method_name, *args)
ensure
InstanceExecMethods.module_eval { remove_method(method_name) } rescue nil
end
end
end
end
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