Hi Jiannan, I think you’ll get a better answer to your question on the ‘swift-dev’ list, actually.
Hope this helps, - Tony > On Dec 2, 2017, at 9:08 AM, Cao, Jiannan via swift-corelibs-dev > <swift-corelibs-dev@swift.org> wrote: > > Hi everyone, > > I'd like to discuss the relation between RangeReplaceableCollection and > MutableCollection > > MutableCollection is a Collection type that can { set } any element with > subscript(position: Index). (and also { set } for subscript(range: > Range<Index>)) > > RangeReplaceableCollection requires a function replaceRange(_:with:) > > If a type conforms to RangeReplaceableCollection, it means any of its range > can be replaced, that includes the situation to replace only one element. > So if some type conforms to RangeReplaceableCollection, it is sufficient to > be a MutableCollection. > So I think the RangeReplaceableCollection should conforms to > MutableCollection should inherits from MutableCollection. > > Thanks! > Jiannan > > > _______________________________________________ > swift-corelibs-dev mailing list > swift-corelibs-dev@swift.org > https://lists.swift.org/mailman/listinfo/swift-corelibs-dev _______________________________________________ swift-corelibs-dev mailing list swift-corelibs-dev@swift.org https://lists.swift.org/mailman/listinfo/swift-corelibs-dev