charesc gem reloaded

charesc.rb

class Module
  m = instance_method(:const_missing)
  
  define_method :const_missing do |name|
    if name.to_s =~ /^U([0-9a-fA-F]{4})$/
      [$1.to_i(16)].pack("U*")
    else
      m.bind(self).call(name)
    end
  end
end

puts U0123 # => ģ
puts U0041 # => A
puts Fred  # => raise NameError: uninitialized constant Fred