Re: [rust-dev] Adding "else" on "for" loops, like Python

[Simon Sapin]

Le 11/08/2013 23:18, Jens Nockert a écrit :
for i in iterations {
   …
   if converged {
     break;
   }
}
if iterations.finished() {
   fail!("Oh noes, it did not converge");
}

The only way to implement .finished() non destructively (so that, when 
returning false, it does not eat an element) is with a Peekable iterator 
as in this pull request:

https://github.com/mozilla/rust/pull/8428

Then .finished() is .peek().is_none().

But this is unnecessary overhead if you don’t otherwise use .peek(). The 
for-loop already knows how it exited.

--
Simon Sapin
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