On Sun, Apr 17, 2016 at 11:10 AM, Matthew Johnson via swift-evolution <swift-evolution@swift.org> wrote: > These extension points are effectively “optional protocol requirements”.
I'm sorry, but they are not optional requirements. They are workarounds for a language issue -- inability to make conditionally-available methods customizable by a conforming type. 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 <griboz...@gmail.com>*/ _______________________________________________ swift-evolution mailing list swift-evolution@swift.org https://lists.swift.org/mailman/listinfo/swift-evolution