Forum: Ruby-core [Ruby 1.9-Bug#3769][Open] Removing Predefined Constants

Bug #3769: Removing Predefined Constants
http://redmine.ruby-lang.org/issues/show/3769

Author: Run Paint Run Run
Status: Open, Priority: Low
Category: core
ruby -v: ruby 1.9.3dev (2010-08-30 trunk 29147) [i686-linux]

The documentation for Module#remove_const states "Predefined classes and 
singleton objects (such as true) cannot be removed", but I believe the 
example below illustrates that they can. Is this a documentation or 
implementation bug?

  run@paint:~ →  cat /tmp/remove_const.rb
  Module.constants.grep(/(?<!Object)$/).tap do |c|
    c.each    {|_|  Object.class_eval{ remove_const _} }
    p c.select{|_| Object.const_defined? _}
  end
  run@paint:~ →  ruby -vw /tmp/remove_const.rb
  ruby 1.9.3dev (2010-08-30 trunk 29147) [i686-linux]
  []

Issue #3769 has been updated by Run Paint Run Run.

File mod-remove-const.patch added

> Category changed from core to DOC

Assuming this means the docs are at fault, the attached removes the last 
sentence "Predefined classes and singleton objects (such as <i>true</i>) 
cannot be removed." on the basis that my above description proves the 
first clause wrong, and the latter is implied by the fact that methods 
such as #constants don't regard _true_ as a constant, either.
----------------------------------------
http://redmine.ruby-lang.org/issues/show/3769

Issue #3769 has been updated by Nobuyoshi Nakada.

Status changed from Open to Closed
% Done changed from 0 to 100

This issue was solved with changeset r29519.
Run Paint, thank you for reporting this issue.
Your contribution to Ruby is greatly appreciated.
May Ruby be with you.