diff options
Diffstat (limited to 'activesupport/lib/active_support/core_ext/class/subclasses.rb')
| -rw-r--r-- | activesupport/lib/active_support/core_ext/class/subclasses.rb | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/activesupport/lib/active_support/core_ext/class/subclasses.rb b/activesupport/lib/active_support/core_ext/class/subclasses.rb index 8a21c71a42..10a7c787f6 100644 --- a/activesupport/lib/active_support/core_ext/class/subclasses.rb +++ b/activesupport/lib/active_support/core_ext/class/subclasses.rb @@ -6,7 +6,20 @@ class Class # Test if this Ruby supports each_object against singleton_class ObjectSpace.each_object(Numeric.singleton_class) {} - def descendants # :nodoc: + # 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 descendants = [] ObjectSpace.each_object(singleton_class) do |k| descendants.unshift k unless k == self @@ -14,7 +27,7 @@ class Class descendants end rescue StandardError # JRuby 9.0.4.0 and earlier - def descendants # :nodoc: + def descendants descendants = [] ObjectSpace.each_object(Class) do |k| descendants.unshift k if k < self |