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Added methods for removing subclasses -- couldnt make it work with th…

…e regular nested-module approach (ObjectSpace was being difficult), so this is a straight inclusion

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@506 5ecf4fe2-1ee6-0310-87b1-e25e094e27de
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1 parent 1369623 commit c37e8d365b9470a593668476fc9be0af6da2e812 @dhh dhh committed Jan 25, 2005
@@ -0,0 +1,24 @@
+class Object #:nodoc:
+ def remove_subclasses_of(superclass)
+ subclasses_of(superclass).each { |subclass| Object.send(:remove_const, subclass) rescue nil }
+ end
+
+ def subclasses_of(superclass)
+ subclasses = []
+ ObjectSpace.each_object(Class) do |k|
+ next if !k.ancestors.include?(superclass) || superclass == k || k.to_s.include?("::") || subclasses.include?(k.to_s)
+ subclasses << k.to_s
+ end
+ subclasses
+ end
+end
+
+class Class #:nodoc:
+ def remove_subclasses
+ Object.remove_subclasses_of(self)
+ end
+
+ def subclasses
+ Object.subclasses_of(self)
+ end
+end
@@ -0,0 +1,21 @@
+require 'test/unit'
+require File.dirname(__FILE__) + '/../../lib/core_ext/object_and_class'
+
+class A; end
+class B < A; end
+class C < B; end
+class D < A; end
+
+class ClassExtTest < Test::Unit::TestCase
+ def test_methods
+ assert defined?(B)
+ assert defined?(C)
+ assert defined?(D)
+
+ A.remove_subclasses
+
+ assert !defined?(B)
+ assert !defined?(C)
+ assert !defined?(D)
+ end
+end

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