Sha256: f2eb21cc47e0b9d27c5a4aa3a26b8a33e766760e1010cc9adfdb38d36b945a30
Contents?: true
Size: 884 Bytes
Versions: 4
Compression:
Stored size: 884 Bytes
Contents
# frozen_string_literal: true
require "active_support/ruby_features"
class Class
# Returns an array with all classes that are < than its receiver.
#
# class C; end
# C.descendants # => []
#
# class B < C; end
# C.descendants # => [B]
#
# class A < B; end
# C.descendants # => [B, A]
#
# class D < C; end
# C.descendants # => [B, A, D]
def descendants
ObjectSpace.each_object(singleton_class).reject do |k|
k.singleton_class? || k == self
end
end unless ActiveSupport::RubyFeatures::CLASS_SUBCLASSES
# Returns an array with the direct children of +self+.
#
# class Foo; end
# class Bar < Foo; end
# class Baz < Bar; end
#
# Foo.subclasses # => [Bar]
def subclasses
descendants.select { |descendant| descendant.superclass == self }
end unless ActiveSupport::RubyFeatures::CLASS_SUBCLASSES
end
Version data entries
4 entries across 4 versions & 1 rubygems