From: Preben Randhol <randhol+abuse@pvv.org>
Subject: Whether to raise exception or End_of_List function
Date: Wed, 21 Nov 2001 15:17:52 +0000 (UTC)
Date: 2001-11-21T15:17:52+00:00 [thread overview]
Message-ID: <slrn9vnh96.55u.randhol+abuse@kiuk0156.chembio.ntnu.no> (raw)
Hi
I have made a simple double linked list that I use in the application I
develop. Before somebody suggest I use some other libraries I want to
say that I made this double linked list to learn Ada 95 and get aware of
different problems/aspects of implementing this, so at least for this
application I want to keep it for now.
The list code can be viewed here: http://www.pvv.org/~randhol/Ada95/List/
Note that the code is still rough, I haven't removed some debugging
functions/procedures etc...
I put this into a package:
package Examine_List is
new Double_Linked_List (Data_Type => Natural);
Main_Examine : Examine_List.List_Type := Examine_List.New_List;
And use the Main_Examine. So far it has worked nicely, but now I came to
that at one place (at least) in my application I have to go from the
current position of the iterator until the end of the list. I cannot
know the current position of the list iterator so I cannot use a
for-loop. If I want to use a while loop however there are the problem of
knowing when the end of the list is reached. I guess I can make a
function End_of_List (which must also work if one try to backwards in
the list) or I can just raise an exception when the user tries to
step off the list.
My question is which is the better solution; Exception or a End_of_List
function and which would have fewer side effects?
Thanks in advance.
Preben
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next reply other threads:[~2001-11-21 15:17 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-11-21 15:17 Preben Randhol [this message]
2001-11-21 16:32 ` Whether to raise exception or End_of_List function Preben Randhol
2001-11-21 16:51 ` Mark Biggar
2001-11-21 17:00 ` Preben Randhol
2001-11-21 17:01 ` Larry Kilgallen
2001-11-21 17:03 ` Preben Randhol
2001-11-21 19:34 ` Ed Falis
2001-11-21 17:04 ` chris.danx
2001-11-21 17:09 ` chris.danx
2001-11-21 22:00 ` Larry Kilgallen
2001-11-21 17:11 ` Jeffrey Carter
2001-11-21 17:53 ` Stephen Leake
2001-11-21 18:51 ` Preben Randhol
2001-11-22 3:53 ` Nick Roberts
2001-11-22 10:23 ` Preben Randhol
2001-11-23 14:37 ` Preben Randhol
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