Feature #9779: Add Module#descendents

• Status: Open
• Assignee: -
• Target version: -

[shugo (Shugo Maeda)]

Now classes have links to their subclasses, so how about to add Module#descendents?

class X
end

class Y < X
end

class Z < Y
end

p X.descendents    #=> [X, Y, Z]

module A
end

module B
  include A
end

module C
  include A
end

p A.descendents    #=> [A, C, B]

One of my own use cases is to implement AspectJ like pointcut which matches all subclasses of the given class.

Considerations:

• Should the return value of Module#descendents include self?
• Should the return value of Module#descendents include singleton classes?

I attach a patch, where the return value includes both self and singleton classes.

[shugo (Shugo Maeda)]

s/descendents/descendants/

[naruse (Yui NARUSE)]

• Target version deleted (2.2.0)

[jeremyevans0 (Jeremy Evans)]

• Related to Feature #14394: Class.descendants added