Would this require a review/proposal, since it involves an API change? On Mon, Dec 7, 2015 at 2:08 PM, Dmitri Gribenko via swift-dev < swift-dev@swift.org> wrote:
> Hi, > > If someone looks for a starter project in the standard library with > intermediate complexity (prior experience with Swift generics > required), here's one. > > This is in the area of existential sequence and collection wrappers. > > Upgrading AnyForwardCollection to AnyRandomAccessCollection works: > > (swift) AnyRandomAccessCollection(AnyForwardCollection([1,2,3])) > // r2 : AnyRandomAccessCollection<Int>? = > Optional(Swift.AnyRandomAccessCollection<Swift.Int>(_box: > Swift._CollectionBox<Swift.Array<Swift.Int>>)) > > Seems like we don't provide APIs to upgrade AnySequence to Any*Collection: > > (swift) AnyRandomAccessCollection(AnySequence([1,2,3])) > <REPL Input>:1:1: error: cannot invoke initializer for type > 'AnyRandomAccessCollection<_>' with an argument list of type > '(AnySequence<Int>)' > > Of course, this should work without copying the underlying collection. > > https://bugs.swift.org/browse/SR-119 > > 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-dev mailing list > swift-dev@swift.org > https://lists.swift.org/mailman/listinfo/swift-dev >
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