> On 22. Sep 2017, at 23:55, Ben Cohen <ben_co...@apple.com> wrote: > > In order to be able to use pos… this function would need to be converted from > it’s current signature (that takes a concrete Range) to be generic over any > RangeExpression.In this case of this method, the range is optional – and in > case of nil (which is the default) there would be insufficient context to > determine the actual type of the RangeExpression. So we’d need to have an > overload instead. > > But none of this ought to be necessary, because constant time slicing and > index sharing means we don’t need to have functions take optional range > arguments any more. Instead you can just write str[pos...].range(of: “f”).
That makes sense. > > Except... this technique has a bug in it for this particular method when used > on substrings, that we need to fix before that can be used instead. Hoping > for that to be fixed on master soon... Good to know! Regards, Martin > >> On Sep 21, 2017, at 2:44 AM, Martin R via swift-users <swift-users@swift.org >> <mailto:swift-users@swift.org>> wrote: >> >> The range(of:options:range:locale:) method of StringProtocol does not accept >> a partial range as search range. Example (Xcode 9, Swift 4): >> >> let str = "foo" >> let pos = str.startIndex >> let r = str.range(of: "f", range: pos...) >> // error: cannot convert value of type 'PartialRangeFrom<String.Index>' >> // to expected argument type 'Range<String.Index>?' >> >> Is that because it is an NSString method imported to Swift? Would it make >> sense to file an enhancement request? >> >> Regards, Martin >> >> _______________________________________________ >> swift-users mailing list >> swift-users@swift.org <mailto:swift-users@swift.org> >> https://lists.swift.org/mailman/listinfo/swift-users >
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