Re: What would you like in Ada202X?

[Adam Beneschan <adam@irvine.com>]

On Thursday, May 10, 2012 8:51:43 AM UTC-7, ytomino wrote:
> On Friday, May 11, 2012 12:25:08 AM UTC+9, Adam Beneschan wrote:
> > On Thursday, May 10, 2012 12:18:52 AM UTC-7, ytomino wrote:

> 
> Eh? I've switched to new Google Groups, too. I copied this link from "Paste this link into an email or chat:". It seems to work for me.

Ah, OK, that works for me too.  It doesn't work when I click on the link, even though the link is highlighted and invites me to click on it.  So when I do, I just get the page that says "Welcome to the new Google Groups".  Welcome, indeed.  I've said this multiple times before, but every time Google improves Google Groups they make it worse.  On the other hand, the new Google Groups does have some cool features, such as ... ummm ... having the word "new" in the title.  That's a cool feature, right?  Right?

Anyway, I looked over the thread, and it's one I was involved a lot in.  As I see it, it boils down to (1) End_Of_File should never be used on standard input, because that could cause problems if standard input is not a file.  It could require the program to attempt to read input from the user at the wrong time.  (2) If End_Of_File is used on a File_Type, implementations can always get things to work reasonably when the file is a disk file, and no language change is needed.

What *might* be useful, though, is an overloaded Get_Line that also returns End_Of_File as an OUT Boolean.  This would solve the problem of requiring an exception to determine when end-of-file occurs, without requiring the program to call End_Of_File before Get_Line which doesn't really work with standard input.

                      -- Adam






> The title is "Get_Line problem (GNAT bug?)", at Dec 2006. Please search.
> You may remember it because you had joined in this thread. (I had not joined :-)