class Class #:nodoc: # Unassociates the class with its subclasses and removes the subclasses # themselves. # # Integer.remove_subclasses # => [Bignum, Fixnum] # Fixnum # => NameError: uninitialized constant Fixnum def remove_subclasses Object.remove_subclasses_of(self) end # Returns an array with the names of the subclasses of +self+ as strings. # # Integer.subclasses # => ["Bignum", "Fixnum"] def subclasses Object.subclasses_of(self).map { |o| o.to_s } end # Removes the classes in +klasses+ from their parent module. # # Ordinary classes belong to some module via a constant. This method computes # that constant name from the class name and removes it from the module it # belongs to. # # Object.remove_class(Integer) # => [Integer] # Integer # => NameError: uninitialized constant Integer # # Take into account that in general the class object could be still stored # somewhere else. # # i = Integer # => Integer # Object.remove_class(Integer) # => [Integer] # Integer # => NameError: uninitialized constant Integer # i.subclasses # => ["Bignum", "Fixnum"] # Fixnum.superclass # => Integer def remove_class(*klasses) klasses.flatten.each do |klass| # Skip this class if there is nothing bound to this name next unless defined?(klass.name) basename = klass.to_s.split("::").last parent = klass.parent # Skip this class if it does not match the current one bound to this name next unless parent.const_defined?(basename) && klass = parent.const_get(basename) parent.instance_eval { remove_const basename } unless parent == klass end end end