Should the reverse iterators on strings and vectors be removed?

[Kimundi]

Most common iterators also implement DoubleEndedIterator, which means we can turn an Iterator into an reverse Iterator. The replacement would look like this:

"foo".rev_iter()             -> "foo".iter().invert()
"foo".byte_rev_iter()        -> "foo".byte_iter().invert()
"foo".char_offset_rev_iter() -> "foo".char_offset_iter().invert()
"foo".split_rev_iter()       -> "foo".split_iter().invert()

[bluss]

Fyi, splitn_iter is not a double-ended iterator today, because "split on 'x' 5 times from the front" is not easily reversible. If you change the definition to "split on 'x' 5 times from either end we take elements from", it would be, but that's an inconsistent step away from other double ended iterators.

(On the others, I'm sympathetic. 18 iterator methods is a lot.)

[Kimundi]

Ah, didn't realize that. We'd have to keep splitn separate then.