Proposed API for controller error reporting

reporting_controller.rb

class TestController < ApplicationController
  report RuntimeError, :status => 411, :error_code => :oh_noes
  report ArgumentError, :status => 407, :error_code => :eeep do |exception, report|
    report[:nartiploom] = Time.now
    report[:banditry] = exception.class.name
  end
  report IndexError, :status => 404
  def index
    case params[:boom]
    when 'arg'
      raise ArgumentError, 'arg'
    when 'fish'
      {}.fetch 5
    else
      raise 'oops'
    end
  end
end