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Diffstat (limited to 'src/Utils.ml')
| -rw-r--r-- | src/Utils.ml | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/src/Utils.ml b/src/Utils.ml index a285e869..16ee7252 100644 --- a/src/Utils.ml +++ b/src/Utils.ml @@ -1,3 +1,20 @@ +(* Split a list at a given index [i] (the first list contains all the elements + up to element of index [i], not included, the second one contains the remaining + elements. Note that the first returned list has length [i]. +*) +let rec list_split_at (ls : 'a list) (i : int) = + if i < 0 then raise (Invalid_argument "list_split_at take positive integers") + else if i = 0 then ([], ls) + else + match ls with + | [] -> + raise + (Failure + "The int given to list_split_at should be <= the list's length") + | x :: ls' -> + let ls1, ls2 = list_split_at ls' (i - 1) in + (x :: ls1, ls2) + exception Found (** Utility exception |