Hi.
I was looking to implement SE-0174
<https://github.com/apple/swift-evolution/blob/master/proposals/0174-filter-range-replaceable.md>
(Change filter to return an associated type) but noticed that a different
RangeReplaceableCollection.filter implementation had already been added in
fd2ac31 to make String.filter return a String.
The RangeReplaceableCollection.filter implementation in SE-0174 eagerly
enumerates self to filter its elements:
var result = Self()
for element in self {
if try isIncluded(element) {
result.append(element)
}
}
return result
whereas the current implementation creates Self from a lazy filter:
return try Self(self.lazy.filter(isIncluded))
Which of these implementations is preferred for SE-0174?
The intended behavior of SE-0174 is already there with Data, Set, String, etc.
returning Self when filtered. As far as I can tell the only remaining work is
to add the associated type and specify the type alias in a few places to
disambiguate which implementation is used to satisfy the Sequence protocol,
essentially making this a non functional change. Or am I missing something?
Regards,
David_______________________________________________
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