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