Re: Help with Exceptions!

[tmoran@bix.com]

>In some cases, you *do* want to re-execute the same statement. For example,
>if you query the user for a number, and you get something else:
  If the user still enters 'something else' after being asked for a number
17 times, it should be clear that the prompt is not sufficiently clear,
and one might expect the next input to be the user's foot through the
screen.  The recursive solution has the advantage over a loop that it
might give a storage_error or something beforehand, thus saving the cost
of a monitor.
  Or one could abandon the 're-execute the same statement' approach for:
for p in prompt'range loop
  begin
    Put(prompt(p));
    Get ...
    return;
  exception
    when data_error =>
      if p = prompt'last then raise User_Doesnt_Get_It;end if;
  end;
end loop;
with ever more explicit and simple prompts till you give up on the user.