monarch_dodra:
It's not used in phobos (as far as I know of anyways). It *could* be implemented in SortedRange's BinaryFind though.
Recently SortedRanges were changed, now they don't need to be random access ranges, so this is possible and I think it's good:
https://issues.dlang.org/show_bug.cgi?id=12763 Bye, bearophile