From: Brian Mitchell <binary42@...>
Date: 2007-12-08T07:41:24+09:00
Subject: Re: Clarification of retry change

On Dec 7, 2007 4:56 PM, Michal Suchanek <hramrach@centrum.cz> wrote:
> Hello
>
> When talking about the places where retry is allowed .. what does this
> imply for retry inside if, case, and while?
>
> I do not really use retry nor am I familiar with the grammar trees you
> keep talking about. Just want to remind that there are branching
> constructs inside which the retry might make sense (when placed inside
> a rescue).

I'm not the authority in this case, but those should be working fine
after this change. This mainly deals with any code run by calling a
method inside the rescue. In these cases, you would have to use some
sort of control mechanism to externalize the need to execute the retry
[0].

Brian.

[0]: Something might look like this.. more work but it works. I'm not
sure many will have a case to need something like this.

def retry?
  catch :retry do
    yield
    return false
  end
  true
end

def indirect_retry
  throw :retry
end

rescued = false
begin
  p :begin
  raise
rescue
  p :rescue
  ret = retry? do
    indirect_retry unless rescued
  end

  if ret
    rescued = true
    retry
  end
ensure
  p :ensure
end