pair_of_list
Lib.pair_of_list : 'a list -> 'a * 'a
Turns a two-element list into a pair.
pair_of_list [x, y]
returns (x, y)
.
Fails if applied to a list that is not of length 2.
Lib.singleton_of_list
,
Lib.triple_of_list
,
Lib.quadruple_of_list