<div dir="ltr"><div class="gmail_extra"><div class="gmail_quote">On Thu, Dec 10, 2015 at 2:55 PM, Riley Testut via swift-evolution <span dir="ltr"><<a href="mailto:swift-evolution@swift.org" target="_blank">swift-evolution@swift.org</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div style="word-wrap:break-word"><div style="margin:0px;line-height:normal">I think native swift collections with support for weak references for their contents would be very useful, and in more places than just listed above. I don’t think Array could be easily extended to support it (what happens if a value is released? does everything shift down? do they keep their indices?), but Set and Dictionary (where the keys and/or values could be weak, akin to NSMapTable) would be good candidates IMO.</div><div style="margin:0px;line-height:normal"></div></div></blockquote></div><div class="gmail_extra"><br></div>Seems like an interesting direction to me, using value types as keys and weak references in a dictionary-like data structure seems like a fequent use case. A proposal in this area should include not just the API, but also a discussion of the implementation strategy.</div><div class="gmail_extra"><br></div><div class="gmail_extra">Dmitri<br><div><br></div>-- <br><div class="gmail_signature">main(i,j){for(i=2;;i++){for(j=2;j<i;j++){if(!(i%j)){j=0;break;}}if<br>(j){printf("%d\n",i);}}} /*Dmitri Gribenko <<a href="mailto:gribozavr@gmail.com" target="_blank">gribozavr@gmail.com</a>>*/</div>
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