activesupport/lib/active_support/core_ext/name_error.rb


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# Add a +missing_name+ method to NameError instances.
class NameError < StandardError
  
  # Add a method to obtain the missing name from a NameError.
  def missing_name
    $1 if /((::)?([A-Z]\w*)(::[A-Z]\w*)*)$/ =~ message
  end
  
  # Was this exception raised because the given name was missing?
  def missing_name?(name)
    missing_name == name.to_s
  end
  
end