Support iterating over pairs in foreach
In !3913 (closed), foreach (IN ZIP_LISTS)
is proposed. Related is foreach (first second IN LISTS)
which takes two items from the lists each iteration. This requires a policy as mentioned in this discussion. @purpleKarrot proposes foreach (TUPLE)
to signal this case. foreach (IN TUPLES)
might also work.
Cc: @brad.king @zaufi