Re: Whether to raise exception or End_of_List function

[Kilgallen@SpamCop.net (Larry Kilgallen)]

In article <68RK7.3295$AQ3.467408@news6-win.server.ntlworld.com>, "chris.danx" <chris.danx@ntlworld.com> writes:

>> My question is which is the better solution; Exception or a End_of_List
>> function and which would have fewer side effects?
> 
> Have both!  i.e. an End_Of_List function for when you need to know when
> you've reached the end of a list, and an exception for when you fall of the
> list and attempt to use it.

"Have both" is exactly equivalent to "have a function", since if there
is a function and the caller ignores it _some_ action must be taken.
Raising an exception in such circumstances is much more in the Ada
tradition than returning a random entry from the middle of the list :-)