allowing objects to specify exception types

gistfile1.rb

class Share
  def call
    list.each do |address|
      referral = new_referral(address)

      # All else being equal, I'd probably prefer a caller-specified
      # fallback strategy
      referral.save do
        @unsaved << referral
      end
    end
  end
  
  def new_referral(address)
    Referral.new(address)
  end
end

class Referral
  class Invalid < StandardError; end
  
  def save
    # ... 
    # if invalid:
    if block_given? then yield else raise Invalid end
  end
end

Interesting approach. I've been playing with this.
It reads like the block should run during the save. Or in other words, save do looks like something that happens during a successful save. But this does nicely remove the explicit reference to the exception class.

Another approach is to accept an explicit :on_error option which takes a callable.

…

On Dec 24, 2011 10:01 AM, "Jim Gay" < ***@***.***> wrote: Interesting approach. I've been playing with this. It reads like the block should run during the save. Or in other words, `save do` looks like something that happens during a successful save. But this does nicely remove the explicit reference to the exception class. --- Reply to this email directly or view it on GitHub: https://gist.github.com/1516514

Thanks for your thoughts on this!