[swift-evolution] Improvement proposal: change overflow behavior in successor()/predecessor() methods for Int types

[Dmitri Gribenko]

On Thu, Apr 7, 2016 at 11:27 AM, Vladimir.S <svabox at gmail.com> wrote:
> OK, thank you for the clarification Dmitri.
> If these methods are going away - no possible problems :-)
> Will we have some kind of .next() method for integers in new indexing model
> and in Swift 3.0 in general?

There would be no need to.  Collection will have a .successor(of:)
method that returns the next index after the given one.

> (But actually I don't agree that there is all OK with these functions in
> current version of Swift. "Not designed" - understand, but they can be
> used(so they will! be used) "out of the box", even Int8 has these methods,
> Int32.max is just 2GB for [Int8] etc..
> Yes, in case of using successor() only with Int64 only for indices of Array
> - all looks like OK.)

I can see that, but when you know that you are dealing with an
integer, isn't "+ 1" a more common and readable notation?

Dmitri

-- 
main(i,j){for(i=2;;i++){for(j=2;j<i;j++){if(!(i%j)){j=0;break;}}if
(j){printf("%d\n",i);}}} /*Dmitri Gribenko <gribozavr at gmail.com>*/